{"id":40768,"date":"2025-05-30T11:15:01","date_gmt":"2025-05-30T03:15:01","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/40768.html"},"modified":"2025-05-30T11:15:01","modified_gmt":"2025-05-30T03:15:01","slug":"%e3%80%90springboot%e3%80%91%e4%bb%8e%e9%9b%b6%e5%bc%80%e5%a7%8b%e5%85%a8%e9%9d%a2%e8%a7%a3%e6%9e%90spring-iocdi-%e4%ba%8c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/40768.html","title":{"rendered":"\u3010SpringBoot\u3011\u4ece\u96f6\u5f00\u59cb\u5168\u9762\u89e3\u6790Spring Ioc&DI (\u4e8c)"},"content":{"rendered":"

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u672c\u7bc7\u535a\u5ba2\u7ed9\u5927\u5bb6\u5e26\u6765\u7684\u662fSpringBoot\u7684\u77e5\u8bc6\u70b9, \u672c\u7bc7 \u63a5\u7eed\u4e0a\u7bc7, \u4ecb\u7ecdSpring IoC & DI \u76f8\u5173\u77e5\u8bc6. \u7531\u4e8e\u7eed \u4e0a\u7bc7\u6587\u7ae0\u7684\u5185\u5bb9\u6765\u8bb2, \u6240\u4ee5\u76ee\u5f55\u4ece 3 \u5f00\u59cb. 🐎\u6587\u7ae0\u4e13\u680f: JavaEE\u8fdb\u9636 👉gitte\u94fe\u63a5: \u85af\u6761\u4e0d\u8981\u756a\u8304\u9171 🚀\u82e5\u6709\u95ee\u9898 \u8bc4\u8bba\u533a\u89c1 \u2764 <\/font>\u6b22\u8fce\u5927\u5bb6\u70b9\u8d5e \u8bc4\u8bba \u6536\u85cf \u5206\u4eab \u5982\u679c\u4f60\u4e0d\u77e5\u9053\u5206\u4eab\u7ed9\u8c01,\u90a3\u5c31\u5206\u4eab\u7ed9\u85af\u6761. \u4f60\u4eec\u7684\u652f\u6301\u662f\u6211\u4e0d\u65ad\u521b\u4f5c\u7684\u52a8\u529b .<\/font><\/p>\n<\/p>\n

\u738b\u5b50,\u516c\u4e3b\u8bf7\u9605🚀<\/font><\/h4>\n
    \n
  • \u8981\u5f00\u5fc3<\/li>\n
  • \n
      \n
    • \u8981\u5feb\u4e50<\/li>\n
    • \n
        \n
      • \u987a\u4fbf\u8fdb\u6b65<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
      • 3. loC\u8be6\u89e3<\/font><\/li>\n
      • \n
          \n
        • 3.1 Bean\u7684\u5b58\u50a8<\/font><\/li>\n
        • \n
            \n
          • 3.1.1 @Controller（\u63a7\u5236\u5668\u5b58\u50a8）<\/font><\/li>\n
          • 3.1.2 @Service（\u670d\u52a1\u5b58\u50a8）<\/font><\/li>\n
          • 3.1.3 @Repository（\u4ed3\u5e93\u5b58\u50a8) <\/font><\/li>\n
          • 3.1.4 @Component（\u7ec4\u4ef6\u5b58\u50a8）<\/font><\/li>\n
          • 3.1.5 @Configuration（\u914d\u7f6e\u5b58\u50a8）<\/font><\/li>\n<\/ul>\n<\/li>\n
          • 3.2 \u4e3a\u4ec0\u4e48\u9700\u8981\u90a3\u4e48\u591a\u7c7b\u6ce8\u89e3.<\/font><\/li>\n
          • 3.3 \u65b9\u6cd5\u6ce8\u89e3 @Bean<\/font><\/li>\n
          • \n
              \n
            • 3.3.1 \u65b9\u6cd5\u6ce8\u89e3\u8981\u914d\u5408\u7c7b\u6ce8\u89e3\u4f7f\u7528<\/font><\/li>\n
            • 3.3.2 \u5b9a\u4e49\u591a\u4e2a\u5bf9\u8c61<\/font><\/li>\n
            • 3.3.3 \u91cd\u540d\u547d Bean<\/font><\/li>\n<\/ul>\n<\/li>\n
            • 3.4 \u626b\u63cf\u8def\u5f84<\/font><\/li>\n<\/ul>\n<\/li>\n
            • 4. DI \u8be6\u89e3<\/font><\/li>\n
            • \n
                \n
              • 4.1 \u5c5e\u6027\u6ce8\u5165<\/font><\/li>\n
              • 4.2 \u6784\u9020\u65b9\u6cd5\u6ce8\u5165<\/font><\/li>\n
              • 4.3 Setter \u6ce8\u5165<\/font><\/li>\n
              • 4.4 \u4e09\u79cd\u6ce8\u5165\u7684\u4f18\u7f3a\u70b9(\u9762\u8bd5\u9898)<\/font><\/li>\n
              • 4.5 @Autowired\u5b58\u5728\u95ee\u9898<\/font><\/li>\n
              • \n
                  \n
                • 4.5.1 @Autowird \u4e0e @Resource\u7684\u533a\u522b?(\u5e38\u89c1\u9762\u8bd5\u9898)<\/font><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
                • 5. \u603b\u7ed3<\/font><\/li>\n
                • \n
                    \n
                  • 5.1 Spring, Spring Boot \u548cSpring MVC\u7684\u5173\u7cfb\u4ee5\u53ca\u533a\u522b<\/font><\/li>\n
                  • 5.2 \u5e38\u89c1\u6ce8\u89e3\u6709\u54ea\u4e9b? \u4f5c\u7528\u5206\u522b\u662f\u4ec0\u4e48? (\u5e38\u89c1\u9762\u8bd5\u9898) <\/font><\/li>\n
                  • <\/font><\/li>\n
                  • \n
                      \n
                    • <\/font><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

                      \u8981\u5f00\u5fc3<\/h2>\n

                      \u8981\u5feb\u4e50<\/h3>\n

                      \u987a\u4fbf\u8fdb\u6b65<\/h4>\n

                      3. loC\u8be6\u89e3<\/font><\/h2>\n

                      <\/font> \u77e5\u9053\u4e86 Spring IoC \u548c DI \u7684\u57fa\u672c\u64cd\u4f5c, \u63a5\u4e0b\u6765\u6211\u4eec\u6765\u7cfb\u7edf\u7684\u5b66\u4e60Spring IoC \u548c DI \u7684\u64cd\u4f5c. \u524d\u9762\u6211\u4eec\u63d0\u5230 IoC \u63a7\u5236\u53cd\u8f6c，\u5c31\u662f\u5c06\u5bf9\u8c61\u7684\u63a7\u5236\u6743\u4ea4\u7ed9Spring\u7684IOC\u5bb9\u5668，\u7531IoC\u5bb9\u5668\u521b\u5efa\u53ca\u7ba1\u7406\u5bf9\u8c61\u3002\u8fd9\u5176\u5b9e\u5c31\u662fbean\u7684\u5b58\u50a8.<\/font><\/p>\n

                      3.1 Bean\u7684\u5b58\u50a8<\/font><\/h3>\n

                      <\/font> \u5728\u524d\u9762\u7684\u5165\u95e8\u6848\u4f8b\u4e2d，\u8981\u628a\u67d0\u4e2a\u5bf9\u8c61\u4ea4\u7ed9 IoC \u5bb9\u5668\u7ba1\u7406，\u9700\u8981\u5728\u7c7b\u4e0a\u6dfb\u52a0\u4e00\u4e2a\u6ce8\u89e3： @Component <\/font> \u800cSpring\u6846\u67b6\u4e3a\u4e86\u66f4\u597d\u7684\u670d\u52a1web\u5e94\u7528\u7a0b\u5e8f, \u63d0\u4f9b\u4e86\u66f4\u4e30\u5bcc\u7684\u6ce8\u89e3. <\/font> <\/font> \u5171\u6709\u4e24\u7c7b\u6ce8\u89e3\u7c7b\u578b\u53ef\u4ee5\u5b9e\u73b0： <\/font> <\/font> 1. \u7c7b\u6ce8\u89e3：@Controller\u3001@Service\u3001@Repository\u3001@Component\u3001@Configuration. <\/font> 2. \u65b9\u6cd5\u6ce8\u89e3： @Bean <\/font><\/font><\/p>\n

                      3.1.1 @Controller（\u63a7\u5236\u5668\u5b58\u50a8）<\/font><\/h4>\n

                      <\/font> \u4f7f\u7528 @Controller \u5b58\u50a8 bean \u7684\u4ee3\u7801\u5982\u4e0b\u6240\u793a： <\/font><\/p>\n

                      @Controller<\/span> \/\/ \u5c06\u5bf9\u8c61\u5b58\u50a8\u5230 Spring \u4e2d<\/span>
                      \npublic<\/span> class<\/span> HelloController<\/span> {<\/span>
                      \n public<\/span> void<\/span> sayHi<\/span>(<\/span>)<\/span> {<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"hi, userController…"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u5982\u4f55\u89c2\u5bdf\u8fd9\u4e2a\u5bf9\u8c61\u5df2\u7ecf\u5b58\u5728Spring\u5bb9\u5668\u5f53\u4e2d\u4e86\u5462? <\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \npublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \nApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \nHelloController<\/span> bean =<\/span> context.<\/span>getBean<\/span>(<\/span>HelloController<\/span>.<\/span>class<\/span>)<\/span>;<\/span>
                      \nSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>bean)<\/span>;<\/span>
                      \nbean.<\/span>sayHi<\/span>(<\/span>)<\/span>;<\/span>
                      \n}<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> ApplicationContext \u7ffb\u8bd1\u8fc7\u6765\u5c31\u662f: Spring \u4e0a\u4e0b\u6587.\u56e0\u4e3a\u5bf9\u8c61\u90fd\u4ea4\u7ed9 Spring \u7ba1\u7406\u4e86，\u6240\u4ee5\u83b7\u53d6\u5bf9\u8c61\u8981\u4ece Spring \u4e2d\u83b7\u53d6，\u90a3\u4e48\u5c31\u5f97\u5148\u5f97\u5230 Spring \u7684\u4e0a\u4e0b\u6587. <\/font> <\/font> \u8fd0\u884c\u7a0b\u5e8f,\u5e76\u89c2\u5bdf\u8fd0\u884c\u7ed3\u679c: <\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" <\/font> \u53d1\u73b0\u6210\u529f\u4eceSpring \u4e2d\u83b7\u53d6\u5230 Controller \u5bf9\u8c61,\u5e76\u6267\u884c Controler.sayHi \u65b9\u6cd5. <\/font><\/p>\n

                      <\/font> \u5982\u679c\u628a@Controller <\/font>\u5220\u6389, \u518d\u89c2\u5bdf\u8fd0\u884c\u7ed3\u679c <\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" <\/font> \u62a5\u9519\u63d0\u793a: \u627e\u4e0d\u5230\u7c7b\u578b\u4e3a: com.bite.ioc.controller.HelloController \u7684bean. <\/font> <\/font> \u83b7\u53d6bean\u5bf9\u8c61\u7684\u5176\u4ed6\u65b9\u5f0f <\/font> <\/font> \u4e0a\u8ff0\u4ee3\u7801\u662f\u6839\u636e\u7c7b\u578b\u6765\u67e5\u627e\u5bf9\u8c61, \u5982\u679cSpring\u5bb9\u5668\u4e2d, \u540c\u4e00\u4e2a\u7c7b\u578b\u5b58\u5728\u591a\u4e2abean\u7684\u8bdd, \u600e\u4e48\u6765\u83b7\u53d6\u5462? <\/font> <\/font> ApplicationContext \u4e5f\u63d0\u4f9b\u4e86\u5176\u4ed6\u83b7\u53d6bean\u7684\u65b9\u5f0f, ApplicationContext \u83b7\u53d6bean\u5bf9\u8c61\u7684\u529f\u80fd, \u662f\u7236\u7c7bBeanFactory\u63d0\u4f9b\u7684\u529f\u80fd. <\/font><\/p>\n

                      public<\/span> interface<\/span> BeanFactory<\/span> {<\/span><\/p>\n

                      \/\/…<\/span><\/p>\n

                      \/\/ 1. \u6839\u636ebean\u540d\u79f0\u83b7\u53d6bean<\/span>
                      \n Object<\/span> getBean<\/span>(<\/span>String<\/span> var1)<\/span> throws<\/span> BeansException<\/span>;<\/span>
                      \n \/\/ 2. \u6839\u636ebean\u540d\u79f0\u548c\u7c7b\u578b\u83b7\u53d6bean<\/span>
                      \n <<\/span>T<\/span>><\/span><\/span> T<\/span> getBean<\/span>(<\/span>String<\/span> var1,<\/span> Class<\/span><<\/span>T<\/span>><\/span><\/span> var2)<\/span> throws<\/span> BeansException<\/span>;<\/span>
                      \n \/\/ 3. \u6309bean\u540d\u79f0\u548c\u6784\u9020\u51fd\u6570\u53c2\u6570\u52a8\u6001\u521b\u5efabean,\u53ea\u9002\u2f64\u4e8e\u5177\u6709\u539f\u578b(prototype)\u4f5c\u2f64\u57df\u7684bean<\/span>
                      \n Object<\/span> getBean<\/span>(<\/span>String<\/span> var1,<\/span> Object<\/span>.<\/span>.<\/span>.<\/span> var2)<\/span> throws<\/span> BeansException<\/span>;<\/span>
                      \n \/\/ 4. \u6839\u636e\u7c7b\u578b\u83b7\u53d6bean<\/span>
                      \n <<\/span>T<\/span>><\/span><\/span> T<\/span> getBean<\/span>(<\/span>Class<\/span><<\/span>T<\/span>><\/span><\/span> var1)<\/span> throws<\/span> BeansException<\/span>;<\/span>
                      \n \/\/ 5. \u6309bean\u7c7b\u578b\u548c\u6784\u9020\u51fd\u6570\u53c2\u6570\u52a8\u6001\u521b\u5efabean, \u53ea\u9002\u2f64\u4e8e\u5177\u6709\u539f\u578b(prototype)\u4f5c\u2f64\u57df\u7684bean<\/span>
                      \n <<\/span>T<\/span>><\/span><\/span> T<\/span> getBean<\/span>(<\/span>Class<\/span><<\/span>T<\/span>><\/span><\/span> var1,<\/span> Object<\/span>.<\/span>.<\/span>.<\/span> var2)<\/span> throws<\/span> BeansException<\/span>;<\/span><\/p>\n

                      \/\/…<\/span>
                      \n }<\/span><\/p>\n

                      <\/font> \u5e38\u7528\u7684\u662f\u4e0a\u8ff01,2,4\u79cd, \u8fd9\u4e09\u79cd\u65b9\u5f0f,\u83b7\u53d6\u5230\u7684bean\u662f\u4e00\u6837\u7684\u3002\u5176\u4e2d1,2\u79cd\u90fd\u6d89\u53ca\u5230\u6839\u636e\u540d\u79f0\u6765\u83b7\u53d6\u5bf9\u8c61. bean\u7684\u540d\u79f0<\/font>\u662f\u4ec0\u4e48\u5462? <\/font> <\/font> Spring bean \u662f Spring\u6846\u67b6 \u5728\u8fd0\u884c\u65f6\u7ba1\u7406\u7684\u5bf9\u8c61, Spring \u4f1a\u7ed9\u7ba1\u7406\u7684\u5bf9\u8c61\u8d77\u4e00\u4e2a\u540d\u5b57. \u6bd4\u5982\u5b66\u6821\u7ba1\u7406\u5b66\u751f, \u4f1a\u7ed9\u6bcf\u4e2a\u5b66\u751f\u5206\u914d\u4e00\u4e2a\u5b66\u53f7, \u6839\u636e\u5b66\u53f7, \u5c31\u53ef\u4ee5\u627e\u5230\u5bf9\u5e94\u7684\u5b66\u751f. Spring\u4e5f\u662f\u5982\u6b64, \u7ed9\u6bcf\u4e2a\u5bf9\u8c61\u8d77\u4e00\u4e2a\u540d\u5b57, \u6839\u636eBean\u7684\u540d\u79f0(BeanId)\u5c31\u53ef\u4ee5\u83b7\u53d6\u5230\u5bf9\u5e94\u7684\u5bf9\u8c61. <\/font> <\/font><\/p>\n

                      Bean \u547d\u540d\u7ea6\u5b9a , \u5b98\u65b9\u6587\u6863\u662f\u8fd9\u6837\u8bf4\u660e\u7684 Bean\u5b98\u65b9\u6587\u6863👇<\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" <\/font> \u7a0b\u5e8f\u5f00\u53d1\u4eba\u5458\u4e0d\u9700\u8981\u4e3abean\u6307\u5b9a\u540d\u79f0(BeanId), \u5982\u679c\u6ca1\u6709\u663e\u5f0f\u7684\u63d0\u4f9b\u540d\u79f0(BeanId)，Spring\u5bb9\u5668\u5c06\u4e3a\u8be5 bean\u751f\u6210\u552f\u4e00\u7684\u540d\u79f0. <\/font> <\/font> \u4e00\u822c\u6765\u8bf4, bean\u540d\u79f0\u4ee5\u5c0f\u5199\u5b57\u6bcd\u5f00\u5934，\u7136\u540e\u4f7f\u7528\u9a7c\u5cf0\u5f0f\u5927\u5c0f\u5199 <\/font> <\/font><\/p>\n

                      \u6bd4\u5982: \u7c7b\u540d: UserController, Bean\u7684\u540d\u79f0\u4e3a: userController <\/font> \u7c7b\u540d: AccountManager, Bean\u7684\u540d\u79f0\u4e3a: accountManager<\/font> \u7c7b\u540d: AccountService, Bean\u7684\u540d\u79f0\u4e3a: accountService <\/font><\/font><\/p>\n

                      <\/font> \u4e5f\u6709\u4e00\u4e9b\u7279\u6b8a\u60c5\u51b5, \u5f53\u6709\u591a\u4e2a\u5b57\u7b26\u5e76\u4e14\u7b2c\u4e00\u4e2a\u548c\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u90fd\u662f\u5927\u5199\u65f6, \u5c06\u4fdd\u7559\u539f\u59cb\u7684\u5927\u5c0f\u5199. <\/font> <\/font><\/p>\n

                      \u6bd4\u5982 \u7c7b\u540d: UController, Bean\u7684\u540d\u79f0\u4e3a: UController<\/font> \u7c7b\u540d: AManager, Bean\u7684\u540d\u79f0\u4e3a: AManager <\/font><\/font><\/p>\n

                      <\/font> \u6839\u636e\u547d\u540d\u89c4\u5219, \u6211\u4eec\u6765\u83b7\u53d6Bean, \u987a\u4fbf\u9a8c\u8bc1\u7b2c\u4e00,\u4e8c,\u56db\u79cd\u65b9\u6cd5\u83b7\u53d6\u7684Bean\u5bf9\u8c61\u662f\u5426\u76f8\u540c <\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \npublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \nApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \nHelloController<\/span> bean =<\/span> context.<\/span>getBean<\/span>(<\/span>HelloController<\/span>.<\/span>class<\/span>)<\/span>;<\/span>
                      \nHelloController<\/span> bean1 =<\/span> context.<\/span>getBean<\/span>(<\/span>"helloController"<\/span>,<\/span> HelloController<\/span>.<\/span>class<\/span>)<\/span>;<\/span>
                      \nHelloController<\/span> bean2 =<\/span> (<\/span>HelloController<\/span>)<\/span>context.<\/span>getBean<\/span>(<\/span>"helloController"<\/span>)<\/span>;<\/span>
                      \nSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>bean)<\/span>;<\/span>
                      \nSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>bean1)<\/span>;<\/span>
                      \nSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>bean2)<\/span>;<\/span>
                      \n}<\/span>
                      \n}<\/span><\/p>\n

                      <\/font><\/p>\n

                      \u7a0b\u5e8f\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b: <\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" <\/font> \u53ef\u4ee5\u770b\u5230\u5730\u5740\u4e00\u6837, \u8bf4\u660e\u5bf9\u8c61\u662f\u4e00\u4e2a\u3002 <\/font><\/p>\n

                      <\/font> ApplicationContext \u548c BeanFactory\u7684\u533a\u522b（\u5e38\u89c1\u9762\u8bd5\u9898） <\/font> <\/font> \u2460 \u7ee7\u627f\u5173\u7cfb\u548c\u529f\u80fd\u65b9\u9762\u6765\u8bf4：Spring \u5bb9\u5668\u6709\u4e24\u4e2a\u9876\u7ea7\u7684\u63a5\u53e3：BeanFactory \u548c ApplicationContext\u3002\u5176\u4e2d BeanFactory \u63d0\u4f9b\u4e86\u57fa\u7840\u7684\u8bbf\u95ee\u5bb9\u5668\u7684\u80fd\u529b，\u800c ApplicationContext \u5c5e\u4e8e BeanFactory \u7684\u5b50\u7c7b，\u5b83\u9664\u4e86\u7ee7\u627f\u4e86 BeanFactory \u7684\u6240\u6709\u529f\u80fd\u4e4b\u5916，\u5b83\u8fd8\u62e5\u6709\u72ec\u7279\u7684\u7279\u6027，\u8fd8\u6dfb\u52a0\u4e86\u5bf9\u56fd\u9645\u5316\u652f\u6301\u3001\u8d44\u6e90\u8bbf\u95ee\u652f\u6301\u3001\u4ee5\u53ca\u4e8b\u4ef6\u4f20\u64ad\u7b49\u65b9\u9762\u7684\u652f\u6301. \u2461 \u4ece\u6027\u80fd\u65b9\u9762\u6765\u8bf4：ApplicationContext(\u997f\u6c49) \u662f\u4e00\u6b21\u6027\u52a0\u8f7d\u5e76\u521d\u59cb\u5316\u6240\u6709\u7684 Bean \u5bf9\u8c61，\u800cBeanFactory(\u61d2\u6c49) \u662f\u9700\u8981\u90a3\u4e2a\u624d\u53bb\u52a0\u8f7d\u90a3\u4e2a，\u56e0\u6b64\u66f4\u52a0\u8f7b\u91cf. (\u7a7a\u95f4\u6362\u65f6\u95f4) <\/font><\/p>\n

                      3.1.2 @Service（\u670d\u52a1\u5b58\u50a8）<\/font><\/h4>\n

                      <\/font> \u4f7f\u7528 @Service <\/font>\u5b58\u50a8 bean \u7684\u4ee3\u7801\u5982\u4e0b\u6240\u793a： <\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \npublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \nApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \nUserService<\/span> bean =<\/span> context.<\/span>getBean<\/span>(<\/span>UserService<\/span>.<\/span>class<\/span>)<\/span>;<\/span>
                      \nbean.<\/span>doService<\/span>(<\/span>)<\/span>;<\/span>
                      \n}<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u8bfb\u53d6 bean \u7684\u4ee3\u7801： <\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \npublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \nApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \nUserService<\/span> bean =<\/span> context.<\/span>getBean<\/span>(<\/span>UserService<\/span>.<\/span>class<\/span>)<\/span>;<\/span>
                      \nbean.<\/span>doService<\/span>(<\/span>)<\/span>;<\/span>
                      \n}<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u83b7\u53d6\u6210\u529f <\/font> \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                      3.1.3 @Repository（\u4ed3\u5e93\u5b58\u50a8) <\/font><\/h4>\n

                      <\/font> \u4f7f\u7528 @Repository <\/font>\u5b58\u50a8 bean \u7684\u4ee3\u7801\u5982\u4e0b\u6240\u793a： <\/font><\/p>\n

                      @Repository<\/span>
                      \npublic<\/span> class<\/span> UserRepo<\/span> {<\/span>
                      \n public<\/span> void<\/span> doRepo<\/span>(<\/span>)<\/span> {<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"do Repo…"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u8bfb\u53d6 bean \u7684\u4ee3\u7801： <\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \npublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \nApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \nUserRepo<\/span> bean3 =<\/span> context.<\/span>getBean<\/span>(<\/span>UserRepo<\/span>.<\/span>class<\/span>)<\/span>;<\/span>
                      \nbean3.<\/span>doRepo<\/span>(<\/span>)<\/span>;<\/span>
                      \n}<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u89c2\u5bdf\u8fd0\u884c\u7ed3\u679c, \u53d1\u73b0\u6210\u529f\u4eceSpring \u4e2d\u83b7\u53d6\u5230 UserRepo \u5bf9\u8c61, \u5e76\u6267\u884c UserRepo \u7684 doRepo\u65b9\u6cd5. <\/font><\/p>\n

                      3.1.4 @Component（\u7ec4\u4ef6\u5b58\u50a8）<\/font><\/h4>\n

                      <\/font> \u4f7f\u7528 @Repository \u5b58\u50a8 bean \u7684\u4ee3\u7801\u5982\u4e0b\u6240\u793a： <\/font><\/p>\n

                      @Component<\/span>
                      \npublic<\/span> class<\/span> UserComponent<\/span> {<\/span>
                      \n public<\/span> void<\/span> doComponent<\/span>(<\/span>)<\/span> {<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"do component…"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u8bfb\u53d6\u7684\u4ee3\u7801: <\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \npublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \nApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \nUserComponent<\/span> bean1 =<\/span> context.<\/span>getBean<\/span>(<\/span>UserComponent<\/span>.<\/span>class<\/span>)<\/span>;<\/span>
                      \nbean1.<\/span>doComponent<\/span>(<\/span>)<\/span>;<\/span>
                      \n}<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u89c2\u5bdf\u8fd0\u884c\u7ed3\u679c, \u53d1\u73b0\u6210\u529f\u4eceSpring\u4e2d\u83b7\u53d6\u5230UserComponent \u5bf9\u8c61 , \u5e76\u6267\u884cUserRepository \u7684 doComponent \u65b9\u6cd5.<\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                      3.1.5 @Configuration（\u914d\u7f6e\u5b58\u50a8）<\/font><\/h4>\n

                      <\/font> \u4f7f\u7528 @Configuration<\/font> \u5b58\u50a8 bean \u7684\u4ee3\u7801\u5982\u4e0b\u6240\u793a： <\/font><\/p>\n

                      @Configuration<\/span>
                      \npublic<\/span> class<\/span> UserConfig<\/span> {<\/span>
                      \n public<\/span> void<\/span> doConfig<\/span>(<\/span>)<\/span> {<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"do Config…"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u8bfb\u53d6bean \u4ee3\u7801: <\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \n ApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \n UserConfig<\/span> bean2 =<\/span> context.<\/span>getBean<\/span>(<\/span>UserConfig<\/span>.<\/span>class<\/span>)<\/span>;<\/span>
                      \n bean2.<\/span>doConfig<\/span>(<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u89c2\u5bdf\u8fd0\u884c\u7ed3\u679c, \u53d1\u73b0\u6210\u529f\u4eceSpring\u4e2d\u83b7\u53d6\u5230 UserConfig \u5bf9\u8c61, \u5e76\u6267\u884c doConfig \u65b9\u6cd5.<\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                      3.2 \u4e3a\u4ec0\u4e48\u9700\u8981\u90a3\u4e48\u591a\u7c7b\u6ce8\u89e3.<\/font><\/h3>\n

                      <\/font> \u8fd9\u548c\u524d\u9762\u8bb2\u7684\u5e94\u7528\u5206\u5c42\u662f\u547c\u5e94\u7684. \u8ba9\u7a0b\u5e8f\u5458\u770b\u5230\u7c7b\u6ce8\u89e3\u4e4b\u540e，\u5c31\u80fd\u76f4\u63a5\u4e86\u89e3\u5f53\u524d\u7c7b\u7684\u7528\u9014. <\/font> <\/font> @Controller：<\/font>\u63a7\u5236\u5c42, \u63a5\u6536\u8bf7\u6c42, \u5bf9\u8bf7\u6c42\u8fdb\u884c\u5904\u7406, \u5e76\u8fdb\u884c\u54cd\u5e94. @Service： <\/font>\u4e1a\u52a1\u903b\u8f91\u5c42, \u5904\u7406\u5177\u4f53\u7684\u4e1a\u52a1\u903b\u8f91. @Repository：<\/font>\u6570\u636e\u8bbf\u95ee\u5c42，\u4e5f\u79f0\u4e3a\u6301\u4e45\u5c42. \u8d1f\u8d23\u6570\u636e\u8bbf\u95ee\u64cd\u4f5c. @Configuration：<\/font>\u914d\u7f6e\u5c42. \u5904\u7406\u9879\u76ee\u4e2d\u7684\u4e00\u4e9b\u914d\u7f6e\u4fe1\u606f. <\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" <\/font> \u4e0a\u8ff0\u7c7b\u6ce8\u89e3\u4e4b\u95f4\u7684\u5173\u7cfb: <\/font> <\/font> \u67e5\u770b @Controller \/ @Service \/ @Repository \/ @Configuration <\/font>\u7b49\u6ce8\u89e3\u7684\u6e90\u7801\u53d1\u73b0： <\/font> \u5b9e\u8fd9\u4e9b\u6ce8\u89e3\u91cc\u9762\u90fd\u6709\u4e00\u4e2a\u6ce8\u89e3 @Component <\/font>\u5b83\u4eec\u672c\u8eab\u5c31\u662f\u5c5e\u4e8e @Component <\/font> \u7684"\u5b50\u7c7b". @Component <\/font>\u662f\u4e00\u4e2a\u5143\u6ce8\u89e3，\u4e5f\u5c31\u662f\u8bf4\u53ef\u4ee5\u6ce8\u89e3\u5176\u4ed6\u7c7b\u6ce8\u89e3. @Controller , @Service ,@Repository <\/font>\u7b49. \u8fd9\u4e9b\u6ce8\u89e3\u88ab\u79f0\u4e3a @Component <\/font>\u7684\u884d\u751f\u6ce8\u89e3.<\/font> \u5728\u4f7f\u7528\u7684\u65f6\u5019, @Component \u53ef\u4ee5\u4ee3\u66ff\u4e0a\u8ff0\u56db\u4e2a\u6ce8\u89e3,\u4f46\u662f\u4e0d\u5efa\u8bae\u8fd9\u4e48\u505a\u3002\u4e0d\u7136\u5206\u5c42\u4e0d\u5c31\u767d\u5206\u4e86.\u540c\u65f6\u4ee3\u7801\u53ef\u8bfb\u6027\u4e0d\u9ad8.<\/font><\/p>\n

                      3.3 \u65b9\u6cd5\u6ce8\u89e3 @Bean<\/font><\/h3>\n

                      <\/font> \u7c7b\u6ce8\u89e3\u662f\u6dfb\u52a0\u5230\u67d0\u4e2a\u7c7b\u4e0a\u7684， \u4f46\u662f\u5b58\u5728\u4e24\u4e2a\u95ee\u9898: 1. \u4f7f\u7528\u5916\u90e8\u5305\u91cc\u7684\u7c7b, \u6ca1\u529e\u6cd5\u6dfb\u52a0\u7c7b\u6ce8\u89e3\u3002 2. \u4e00\u4e2a\u7c7b, \u9700\u8981\u591a\u4e2a\u5bf9\u8c61, \u6bd4\u5982\u591a\u4e2a\u6570\u636e\u6e90\u3002 \u8fd9\u79cd\u573a\u666f, \u6211\u4eec\u5c31\u9700\u8981\u4f7f\u7528\u65b9\u6cd5\u6ce8\u89e3 @Bean<\/font><\/font><\/font><\/p>\n

                      <\/font> <\/font> \u65b9\u6cd5\u6ce8\u89e3@Bean\u7684\u4f7f\u7528 <\/font> <\/font><\/p>\n

                      public<\/span> class<\/span> BeanConfig<\/span> {<\/span>
                      \n @Bean<\/span>
                      \n public<\/span> UserInfo<\/span> UCInfo<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"wangwu"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u8bfb\u53d6bean\u4ee3\u7801 <\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \n ApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \n UserInfo<\/span> bean =<\/span> (<\/span>UserInfo<\/span>)<\/span> context.<\/span>getBean<\/span>(<\/span>"UCInfo"<\/span>)<\/span>;<\/span>
                      \nSystem<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>bean)<\/span>;<\/span>
                      \n}<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u8fd0\u884c\u7a0b\u5e8f,\u53d1\u73b0\u62a5\u9519\u4e86, \u62a5\u9519\u4fe1\u606f: A component required a bean named \u2018UCInfo\u2019 that could not be found. \u627e\u4e0d\u5230\u8be5 bean. \u8fd9\u53c8\u662f\u4e3a\u4ec0\u4e48?<\/font><\/p>\n

                      3.3.1 \u65b9\u6cd5\u6ce8\u89e3\u8981\u914d\u5408\u7c7b\u6ce8\u89e3\u4f7f\u7528<\/font><\/h4>\n

                      <\/font> \u5728 Spring \u6846\u67b6\u7684\u8bbe\u8ba1\u4e2d，\u65b9\u6cd5\u6ce8\u89e3 @Bean <\/font>\u8981\u914d\u5408\u7c7b\u6ce8\u89e3\u624d\u80fd\u5c06\u5bf9\u8c61\u6b63\u5e38\u7684\u5b58\u50a8\u5230 Spring \u5bb9\u5668\u4e2d，\u5982\u4e0b\u4ee3\u7801\u6240\u793a： <\/font><\/p>\n

                      @Configuration<\/span>
                      \npublic<\/span> class<\/span> BeanConfig<\/span> {<\/span>
                      \n @Bean<\/span>
                      \n public<\/span> UserInfo<\/span> UCInfo<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"wangwu"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u8fd0\u884c\u7a0b\u5e8f, \u7ed3\u679c\u5982\u4e0b: <\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                      3.3.2 \u5b9a\u4e49\u591a\u4e2a\u5bf9\u8c61<\/font><\/h4>\n

                      <\/font> \u5bf9\u4e8e\u540c\u4e00\u4e2a\u7c7b, \u5982\u4f55\u5b9a\u4e49\u591a\u4e2a\u5bf9\u8c61\u5462? <\/font><\/p>\n

                      @Configuration<\/span>
                      \npublic<\/span> class<\/span> BeanConfig<\/span> {<\/span>
                      \n @Bean<\/span>
                      \n public<\/span> UserInfo<\/span> userInfo<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"zhangsan"<\/span>)<\/span>;<\/span>
                      \n }<\/span><\/p>\n

                      @Bean<\/span>
                      \n public<\/span> UserInfo<\/span> userInfo1<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"lisi"<\/span>)<\/span>;<\/span>
                      \n }<\/span><\/p>\n

                      @Bean<\/span>
                      \n public<\/span> UserInfo<\/span> UCInfo<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"wangwu"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u5b9a\u4e49\u4e86\u591a\u4e2a\u5bf9\u8c61\u7684\u8bdd, \u6211\u4eec\u6839\u636e\u7c7b\u578b\u83b7\u53d6\u5bf9\u8c61, \u83b7\u53d6\u7684\u662f\u54ea\u4e2a\u5bf9\u8c61\u5462? <\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \n ApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \n UserInfo<\/span> beanConfig =<\/span> context.<\/span>getBean<\/span>(<\/span>UserInfo<\/span>.<\/span>class<\/span>)<\/span>;<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>beanConfig)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u8fd0\u884c\u7ed3\u679c: <\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" <\/font> \u62a5\u9519\u4fe1\u606f\u663e\u793a: \u671f\u671b\u53ea\u6709\u4e00\u4e2a\u5339\u914d,\u7ed3\u679c\u53d1\u73b0\u4e86\u4e09\u4e2a userInfo,userInfo1,UCInfo,\u53ef\u4ee5\u770b\u51fa\u6765, @Bean \u6ce8\u89e3\u7684bean, bean\u7684\u540d\u79f0\u5c31\u662f\u5b83\u7684\u65b9\u6cd5\u540d \u63a5\u4e0b\u6765\u6211\u4eec\u6839\u636e\u540d\u79f0\u6765\u83b7\u53d6bean\u5bf9\u8c61\u3002 <\/font><\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \n ApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \n UserInfo<\/span> beanConfig =<\/span> (<\/span>UserInfo<\/span>)<\/span> context.<\/span>getBean<\/span>(<\/span>"userInfo"<\/span>)<\/span>;<\/span>
                      \n UserInfo<\/span> beanConfig1 =<\/span> (<\/span>UserInfo<\/span>)<\/span> context.<\/span>getBean<\/span>(<\/span>"userInfo1"<\/span>)<\/span>;<\/span>
                      \n UserInfo<\/span> beanConfig2 =<\/span> (<\/span>UserInfo<\/span>)<\/span> context.<\/span>getBean<\/span>(<\/span>"UCInfo"<\/span>)<\/span>;<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>beanConfig)<\/span>;<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>beanConfig1)<\/span>;<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>beanConfig2)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u8fd0\u884c\u7ed3\u679c: <\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                      3.3.3 \u91cd\u540d\u547d Bean<\/font><\/h4>\n

                      <\/font> \u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e name \u5c5e\u6027\u7ed9 Bean \u5bf9\u8c61\u8fdb\u884c\u91cd\u547d\u540d\u64cd\u4f5c，\u5982\u4e0b\u4ee3\u7801\u6240\u793a： <\/font><\/p>\n

                      @Configuration<\/span>
                      \npublic<\/span> class<\/span> BeanConfig<\/span> {<\/span>
                      \n @Bean<\/span>(<\/span>name=<\/span>{<\/span>"u1"<\/span>,<\/span>"userInfo"<\/span>}<\/span>)<\/span>
                      \n public<\/span> UserInfo<\/span> userInfo<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"zhangsan"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u6b64\u65f6\u6211\u4eec\u4f7f\u7528 u1 \u5c31\u53ef\u4ee5\u83b7\u53d6\u5230 User \u5bf9\u8c61\u4e86，\u5982\u4e0b\u4ee3\u7801\u6240\u793a： <\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \n ApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \n UserInfo<\/span> beanConfig =<\/span> (<\/span>UserInfo<\/span>)<\/span> context.<\/span>getBean<\/span>(<\/span>"u1"<\/span>)<\/span>;<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>beanConfig)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      3.4 \u626b\u63cf\u8def\u5f84<\/font><\/h3>\n

                      <\/font> \u542f\u52a8\u7c7b\u9ed8\u8ba4\u626b\u63cf\u7684\u8303\u56f4\u662fSpringBoot\u542f\u52a8\u7c7b\u6240\u5728\u5305\u53ca\u5176\u5b50\u5305 \u3002<\/font><\/p>\n

                      <\/font> \u5728\u4e0a\u8ff0 \u91cd\u547d\u540dBean\u4ee3\u7801\u5199\u5b8c\u4e4b\u540e,\u4fdd\u6301\u4ee3\u7801\u4e0d\u53d8, \u5c06\u542f\u52a8\u7c7b\u653e\u5230 controller \u76ee\u5f55\u4e0b,\u518d\u6b21\u542f\u52a8\u7a0b\u5e8f,\u6709\u5982\u4e0b\u7ed3\u679c: <\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" <\/font> \u62a5\u9519\u4fe1\u606f: \u627e\u4e0d\u5230\u540d\u4e3a UCInfo \u7684Bean\u5bf9\u8c61\u3002 <\/font> <\/font> <\/font> \u518d\u628a\u542f\u52a8\u7c7b \u653e\u5230 UCInfo bean\u5bf9\u8c61\u6240\u5728\u7684\u76ee\u5f55, \u542f\u52a8\u7a0b\u5e8f: <\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" <\/font> \u53d1\u73b0\u7a0b\u5e8f\u8fd0\u884c\u6210\u529f. <\/font> <\/font> \u90a3\u95ee\u9898\u6765\u4e86, \u5982\u679c\u6211\u5c31\u662f\u60f3\u628a\u542f\u52a8\u7c7b\u653e\u5728 UCInfo bean\u5bf9\u8c61 \u4e0d\u5728\u7684\u76ee\u5f55\u91cc, \u8fd8\u60f3\u8981\u7a0b\u5e8f\u6b63\u5e38\u6267\u884c, \u600e\u4e48\u529e? <\/font><\/p>\n

                      \u7ed9\u542f\u52a8\u7c7b\u52a0\u4e0a @ComponentScan \u6ce8\u89e3. \u5c31\u53ef\u4ee5\u505a\u5230\u4e86. \u5f53\u7136, \u5b9e\u9645\u5f00\u53d1\u4e2d\u4e0d\u5efa\u8bae\u8fd9\u4e48\u505a. \u8001\u8001\u5b9e\u5b9e\u628a\u542f\u52a8\u7c7b\u7684\u4f4d\u7f6e\u653e\u597d\u5c31\u884c. \u80e1\u641e\u516b\u641e\u7684, \u663e\u5f97\u6709\u4e9b\u82b1\u91cc\u80e1\u54e8\u3002 <\/font><\/p>\n

                      <\/font> \u524d\u9762\u6ca1\u6709\u7ed9\u542f\u52a8\u7c7b\u914d\u7f6e @ComponentScan\u6ce8\u89e3\u4e3a\u4ec0\u4e48\u7a0b\u5e8f\u4e5f\u53ef\u4ee5\u6b63\u5e38\u6267\u884c\u5462? \u70b9\u8fc7\u53bb\u770b\u542f\u52a8\u7c7b\u6ce8\u89e3\u7684\u6e90\u7801👇<\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                      <\/font> \u53d1\u73b0: @ComponentScan<\/font> \u6ce8\u89e3\u867d\u7136\u6ca1\u6709\u663e\u5f0f\u914d\u7f6e，\u4f46\u662f\u5b9e\u9645\u4e0a\u5df2\u7ecf\u5305\u542b\u5728\u4e86\u542f\u52a8\u7c7b\u58f0\u660e\u6ce8\u89e3 @SpringBootApplication <\/font> \u4e2d\u4e86<\/font><\/p>\n

                      <\/font> \u63a8\u8350\u505a\u6cd5: \u542f\u52a8\u7c7b\u653e\u5728\u6211\u4eec\u5e0c\u671b\u626b\u63cf\u7684\u5305\u7684\u8def\u5f84\u4e0b, \u8fd9\u6837\u6211\u4eec\u5b9a\u4e49\u7684bean\u5c31\u90fd\u53ef\u4ee5\u88ab\u626b\u63cf\u5230 \u3002<\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                      4. DI \u8be6\u89e3<\/font><\/h2>\n

                      <\/font> \u4f9d\u8d56\u6ce8\u5165\u662f\u4e00\u4e2a\u8fc7\u7a0b，\u662f\u6307IoC\u5bb9\u5668\u5728\u521b\u5efaBean\u65f6, \u53bb\u63d0\u4f9b\u8fd0\u884c\u65f6\u6240\u4f9d\u8d56\u7684\u8d44\u6e90，\u800c\u8d44\u6e90\u6307\u7684\u5c31\u662f\u5bf9\u8c61. \u5728\u4e0b\u9762\u7a0b\u5e8f\u6848\u4f8b\u4e2d，\u4f7f\u7528\u4e86 @Autowired<\/font> \u8fd9\u4e2a\u6ce8\u89e3，\u5b8c\u6210\u4e86\u4f9d\u8d56\u6ce8\u5165\u7684\u64cd\u4f5c. \u7b80\u5355\u6765\u8bf4, \u5c31\u662f\u628a\u5bf9\u8c61\u53d6\u51fa\u6765\u653e\u5230\u67d0\u4e2a\u7c7b\u7684\u5c5e\u6027\u4e2d. <\/font> <\/font> \u5173\u4e8e\u4f9d\u8d56\u6ce8\u5165, Spring\u4e5f\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e86\u4e09\u79cd\u65b9\u5f0f: 1. \u5c5e\u6027\u6ce8\u5165(Field Injection). 2. \u6784\u9020\u65b9\u6cd5\u6ce8\u5165(Constructor Injection). 3. Setter \u6ce8\u5165(Setter Injection).<\/font><\/font><\/p>\n

                      4.1 \u5c5e\u6027\u6ce8\u5165<\/font><\/h3>\n

                      <\/font> \u4f7f\u7528 @Autowired <\/font>\u5c06 Service \u7c7b\u6ce8\u5165\u5230 Controller \u7c7b\u4e2d\u3002 <\/font> <\/font> Service \u7c7b\u7684\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b： <\/font><\/p>\n

                      @Service<\/span>
                      \npublic<\/span> class<\/span> UserService<\/span> {<\/span><\/p>\n

                      public<\/span> void<\/span> doService<\/span>(<\/span>)<\/span> {<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"do Service…"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> Controller \u7c7b\u7684\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b： <\/font><\/p>\n

                      @Controller<\/span>
                      \npublic<\/span> class<\/span> UserController<\/span> {<\/span><\/p>\n

                      @Autowired<\/span>
                      \n private<\/span> UserService<\/span> userService;<\/span><\/p>\n

                      public<\/span> void<\/span> sayHi<\/span>(<\/span>)<\/span> {<\/span>
                      \n userService.<\/span>doService<\/span>(<\/span>)<\/span>;<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"hi,user Controller"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u83b7\u53d6 Controller \u4e2d\u7684 sayHi \u65b9\u6cd5： <\/font><\/p>\n

                      @SpringBootApplication<\/span>
                      \npublic<\/span> class<\/span> DemoApplication<\/span> {<\/span>
                      \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
                      \n ApplicationContext<\/span> context =<\/span> SpringApplication<\/span>.<\/span>run<\/span>(<\/span>DemoApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
                      \n UserController<\/span> bean =<\/span> context.<\/span>getBean<\/span>(<\/span>"userController"<\/span>,<\/span>UserController<\/span>.<\/span>class<\/span>)<\/span>;<\/span>
                      \n bean.<\/span>sayHi<\/span>(<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" <\/font> \u53bb\u6389@Autowired , \u518d\u8fd0\u884c\u4e00\u4e0b\u7a0b\u5e8f\u770b\u770b\u7ed3\u679c\u3002 <\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                      4.2 \u6784\u9020\u65b9\u6cd5\u6ce8\u5165<\/font><\/h3>\n

                      \u5982\u679c\u6dfb\u52a0\u6784\u9020\u51fd\u6570,\u4e00\u5b9a\u8981\u628a\u65e0\u53c2\u6784\u9020\u51fd\u6570\u663e\u793a\u6dfb\u52a0\u3002 <\/font> \u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u662f\u5728\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u4e2d\u5b9e\u73b0\u6ce8\u5165，\u5982\u4e0b\u4ee3\u7801\u6240\u793a： <\/font><\/p>\n

                      @Controller<\/span>
                      \npublic<\/span> class<\/span> UserController<\/span> {<\/span>
                      \n \/\/\u6784\u9020\u65b9\u6cd5\u6ce8\u5165<\/span>
                      \n private<\/span> UserService<\/span> userService;<\/span><\/p>\n

                      public<\/span> UserController<\/span>(<\/span>)<\/span> {<\/span>}<\/span><\/p>\n

                      @Autowired<\/span>
                      \n public<\/span> UserController<\/span>(<\/span>UserService<\/span> userService)<\/span> {<\/span>
                      \n this<\/span>.<\/span>userService =<\/span> userService;<\/span>
                      \n }<\/span><\/p>\n

                      public<\/span> void<\/span> sayHi<\/span>(<\/span>)<\/span> {<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"hi, UserController…"<\/span>)<\/span>;<\/span>
                      \n userService.<\/span>doService<\/span>(<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u6ce8\u610f\u4e8b\u9879：\u5982\u679c\u7c7b\u53ea\u6709\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5，\u90a3\u4e48 @Autowired <\/font>\u6ce8\u89e3\u53ef\u4ee5\u7701\u7565；\u5982\u679c\u7c7b\u4e2d\u6709\u591a\u4e2a\u6784\u9020\u65b9\u6cd5，\u90a3\u4e48\u9700\u8981\u6dfb\u52a0\u4e0a @Autowired <\/font>\u6765\u660e\u786e\u6307\u5b9a\u5230\u5e95\u4f7f\u7528\u54ea\u4e2a\u6784\u9020\u65b9\u6cd5\u3002 \u5982\u679c\u672a\u6307\u5b9a,\u9ed8\u8ba4\u4f7f\u7528\u65e0\u53c2\u7684\u6784\u9020\u51fd\u6570\u3002<\/font><\/p>\n

                      4.3 Setter \u6ce8\u5165<\/font><\/h3>\n

                      <\/font> Setter \u6ce8\u5165\u548c\u5c5e\u6027\u7684 Setter \u65b9\u6cd5\u5b9e\u73b0\u7c7b\u4f3c，\u53ea\u4e0d\u8fc7\u5728\u8bbe\u7f6e set \u65b9\u6cd5\u7684\u65f6\u5019\u9700\u8981\u52a0\u4e0a @Autowired<\/font> \u6ce8\u89e3 ，\u5982\u4e0b\u4ee3\u7801\u6240\u793a： <\/font><\/p>\n

                      @Controller<\/span>
                      \npublic<\/span> class<\/span> UserController<\/span> {<\/span><\/p>\n

                      \/\/setter\u65b9\u6cd5\u6ce8\u5165<\/span>
                      \n private<\/span> UserService<\/span> userService;<\/span><\/p>\n

                      @Autowired<\/span>
                      \n public<\/span> void<\/span> setUserService<\/span>(<\/span>UserService<\/span> userService)<\/span> {<\/span>
                      \n this<\/span>.<\/span>userService =<\/span> userService;<\/span>
                      \n }<\/span><\/p>\n

                      public<\/span> void<\/span> sayHi<\/span>(<\/span>)<\/span> {<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"hi, UserController…"<\/span>)<\/span>;<\/span>
                      \n userService.<\/span>doService<\/span>(<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      4.4 \u4e09\u79cd\u6ce8\u5165\u7684\u4f18\u7f3a\u70b9(\u9762\u8bd5\u9898)<\/font><\/h3>\n

                      <\/font> \u2160 \u5c5e\u6027\u6ce8\u5165: <\/font><\/p>\n

                      \u4f18\u70b9: \u7b80\u6d01，\u4f7f\u7528\u65b9\u4fbf； \u7f3a\u70b9: \u53ea\u80fd\u7528\u4e8e IoC \u5bb9\u5668，\u5982\u679c\u662f\u975e IoC \u5bb9\u5668\u4e0d\u53ef\u7528\u3002\u4e0d\u80fd\u6ce8\u5165\u4e00\u4e2aFinal\u4fee\u9970\u7684\u5c5e\u6027\u3002<\/font> <\/font><\/p>\n

                      \u2161 \u6784\u9020\u51fd\u6570\u6ce8\u5165(Spring 4.X\u63a8\u8350)<\/font><\/p>\n

                      \u4f18\u70b9: \u53ef\u4ee5\u6ce8\u5165final \u4fee\u9970\u7684\u5c5e\u6027; \u6ce8\u5165\u7684\u5bf9\u8c61\u4e0d\u4f1a\u88ab\u4fee\u6539; \u6784\u9020\u65b9\u6cd5\u662f\u5728\u7c7b\u52a0\u8f7d\u9636\u6bb5\u5c31\u4f1a\u6267\u6027\u7684\u65b9\u6cd5.\u4f9d\u8d56\u5bf9\u8c61\u5728\u4f7f\u7528\u524d\u4e00\u5b9a\u4f1a\u88ab\u5b8c\u5168\u521d\u59cb\u5316; \u6784\u9020\u65b9\u6cd5\u662fJDK\u652f\u6301\u7684, \u66f4\u6362\u4efb\u4f55\u6846\u67b6,\u4ed6\u90fd\u662f\u9002\u7528\u7684, \u6240\u4ee5\u901a\u7528\u6027\u597d\u3002 \u7f3a\u70b9: \u6ce8\u5165\u591a\u4e2a\u5bf9\u8c61\u65f6, \u4ee3\u7801\u4f1a\u6bd4\u8f83\u7e41\u7410\u3002<\/font><\/p>\n

                      \u2162 Setter\u6ce8\u5165 (Spring 3.X\u63a8\u8350)<\/font><\/p>\n

                      \u4f18\u70b9: \u65b9\u4fbf\u5728\u7c7b\u5b9e\u4f8b\u4e4b\u540e, \u91cd\u65b0\u5bf9\u8be5\u5bf9\u8c61\u8fdb\u884c\u914d\u7f6e\u6216\u8005\u6ce8\u5165\u3002 \u7f3a\u70b9: \u4e0d\u80fd\u6ce8\u5165\u4e00\u4e2aFinal\u4fee\u9970\u7684\u5c5e\u6027 \u25aa \u6ce8\u5165\u5bf9\u8c61\u53ef\u80fd\u4f1a\u88ab\u6539\u53d8, \u56e0\u4e3a setter \u65b9\u6cd5\u53ef\u80fd\u4f1a\u88ab\u591a\u6b21\u8c03\u7528, \u5c31\u6709\u88ab\u4fee\u6539\u7684\u98ce\u9669.<\/font><\/p>\n

                      4.5 @Autowired\u5b58\u5728\u95ee\u9898<\/font><\/h3>\n

                      <\/font> \u5f53\u540c\u4e00\u7c7b\u578b\u5b58\u5728\u591a\u4e2abean\u65f6,\u5355\u72ec \u4f7f\u7528@Autowired<\/font>\u4f1a\u5b58\u5728\u627e\u4e0d\u5230Bean\u5bf9\u8c61\u7684\u95ee\u9898.<\/font><\/p>\n

                      @Configuration<\/span>
                      \npublic<\/span> class<\/span> BeanConfig<\/span> {<\/span>
                      \n @Bean<\/span>(<\/span>name=<\/span>{<\/span>"u1"<\/span>,<\/span>"userInfo"<\/span>}<\/span>)<\/span>
                      \n public<\/span> UserInfo<\/span> userInfo<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"zhangsan"<\/span>)<\/span>;<\/span>
                      \n }<\/span><\/p>\n

                      @Bean<\/span>
                      \n public<\/span> UserInfo<\/span> userInfo1<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"lisi"<\/span>)<\/span>;<\/span>
                      \n }<\/span><\/p>\n

                      @Bean<\/span>
                      \n public<\/span> UserInfo<\/span> UCInfo<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"wangwu"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      @Service<\/span>
                      \npublic<\/span> class<\/span> UserService<\/span> {<\/span>
                      \n \/\/\u6ce8\u5165UserInfo<\/span>
                      \n @Autowired<\/span>
                      \n private<\/span> UserInfo<\/span> userInfo;<\/span>
                      \n public<\/span> void<\/span> doService<\/span>(<\/span>)<\/span> {<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"do Service…"<\/span>)<\/span>;<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>userInfo)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u8fd0\u884c\u7a0b\u5e8f,\u67e5\u770b\u7ed3\u679c. <\/font><\/p>\n

                      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                      <\/font> <\/font> \u5982\u679c\u60f3\u8981\u83b7\u53d6\u5230\u67d0\u4e00\u4e2a bean\u5bf9\u8c61, \u5c31\u5f97\u7528\u5230 \u6ce8\u89e3\u4e86.<\/font><\/p>\n

                      \u603b\u5171\u6709\u4e09\u4e2a\u6ce8\u89e3:<\/font><\/p>\n

                      \u2460 @Primary \u2461 @Qualifier \u2462 @Resource <\/font> <\/font> \u4f7f\u7528 @Primary<\/font> \u6ce8\u89e3：\u5f53\u5b58\u5728\u591a\u4e2a\u76f8\u540c\u7c7b\u578b\u7684Bean\u6ce8\u5165\u65f6，\u52a0\u4e0a@Primary <\/font>\u6ce8\u89e3，\u6765\u786e\u5b9a\u9ed8\u8ba4\u7684\u5b9e\u73b0. <\/font><\/font><\/font><\/font><\/p>\n

                      @Configuration<\/span>
                      \npublic<\/span> class<\/span> BeanConfig<\/span> {<\/span>
                      \n @Bean<\/span>(<\/span>name=<\/span>{<\/span>"u1"<\/span>,<\/span>"userInfo"<\/span>}<\/span>)<\/span>
                      \n public<\/span> UserInfo<\/span> userInfo<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"zhangsan"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n @Primary<\/span>
                      \n @Bean<\/span>
                      \n public<\/span> UserInfo<\/span> userInfo1<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"lisi"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n @Bean<\/span>
                      \n public<\/span> UserInfo<\/span> UCInfo<\/span>(<\/span>)<\/span> {<\/span>
                      \n return<\/span> new<\/span> UserInfo<\/span>(<\/span>"wangwu"<\/span>)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u4f7f\u7528@Qualifier <\/font>\u6ce8\u89e3：\u6307\u5b9a\u5f53\u524d\u8981\u6ce8\u5165\u7684 bean \u5bf9\u8c61\u3002 \u5728@Qualifier<\/font>\u7684value\u5c5e\u6027\u4e2d，\u6307\u5b9a\u6ce8\u5165\u7684bean\u7684\u540d\u79f0\u3002 \u2022 @Qualifier<\/font> \u6ce8\u89e3\u4e0d\u80fd\u5355\u72ec\u4f7f\u7528，\u5fc5\u987b\u914d\u5408\u3002@Autowired<\/font> \u4f7f\u7528 \u3002<\/font><\/p>\n

                      \u2022 @Qualifier<\/font> \u7684\u4f18\u5148\u7ea7\u9ad8\u4e8e @Autowired <\/font>, \u5982\u679c\u67e5\u627e @Autowired <\/font> \u5bf9\u5e94\u7684\u7c7b\u578b,\u53ea\u6709\u4e00\u4e2a,\u4f46\u662f\u540d\u79f0\u548c @Qualifier<\/font> \u540d\u79f0\u4e0d\u4e00\u6837,\u6ce8\u5165\u4e5f\u662f\u5931\u8d25\u7684 \u3002<\/font><\/p>\n

                      @Service<\/span>
                      \npublic<\/span> class<\/span> UserService<\/span> {<\/span>
                      \n \/\/\u6ce8\u5165UserInfo<\/span>
                      \n @Qualifier<\/span>(<\/span>"userInfo1"<\/span>)<\/span>\/\/\u6307\u5b9auserInfo1<\/span>
                      \n @Autowired<\/span>
                      \n private<\/span> UserInfo<\/span> userInfo;<\/span>
                      \n public<\/span> void<\/span> doService<\/span>(<\/span>)<\/span> {<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"do Service…"<\/span>)<\/span>;<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>userInfo)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      <\/font> \u4f7f\u7528 @Resource <\/font>\u6ce8\u89e3：\u662f\u6309\u7167bean\u7684\u540d\u79f0\u8fdb\u884c\u6ce8\u5165\u3002\u901a\u8fc7name\u5c5e\u6027\u6307\u5b9a\u8981\u6ce8\u5165\u7684bean\u7684\u540d\u79f0\u3002 <\/font><\/p>\n

                      @Service<\/span>
                      \npublic<\/span> class<\/span> UserService<\/span> {<\/span>
                      \n \/\/\u6ce8\u5165UserInfo<\/span>
                      \n @Resource<\/span>(<\/span>name =<\/span> "UCInfo"<\/span>)<\/span>\/\/\u6307\u5b9a UCInfo<\/span>
                      \n @Autowired<\/span>
                      \n private<\/span> UserInfo<\/span> userInfo;<\/span>
                      \n public<\/span> void<\/span> doService<\/span>(<\/span>)<\/span> {<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"do Service…"<\/span>)<\/span>;<\/span>
                      \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>userInfo)<\/span>;<\/span>
                      \n }<\/span>
                      \n}<\/span><\/p>\n

                      4.5.1 @Autowird \u4e0e @Resource\u7684\u533a\u522b?(\u5e38\u89c1\u9762\u8bd5\u9898)<\/font><\/h4>\n

                      @Autowired \u662fspring\u6846\u67b6\u63d0\u4f9b\u7684\u6ce8\u89e3，\u800c @Resource \u662fJDK\u63d0\u4f9b\u7684\u6ce8\u89e3\u3002 <\/font> <\/font><\/p>\n

                      @Autowired \u9ed8\u8ba4\u662f\u6309\u7167\u7c7b\u578b\u6ce8\u5165，\u800c @Resource \u662f\u6309\u7167\u540d\u79f0+\u7c7b\u578b\u6ce8\u5165. <\/font> \u76f8\u6bd4\u4e8e @Autowired \u6765\u8bf4，@Resource \u652f\u6301\u66f4\u591a\u7684\u53c2\u6570\u8bbe\u7f6e，\u4f8b\u5982 name \u8bbe\u7f6e，\u6839\u636e\u540d\u79f0\u83b7\u53d6 Bean\u3002 <\/font> <\/font><\/p>\n

                      5. \u603b\u7ed3<\/font><\/h2>\n

                      5.1 Spring, Spring Boot \u548cSpring MVC\u7684\u5173\u7cfb\u4ee5\u53ca\u533a\u522b<\/font><\/h3>\n

                      <\/font> Spring: \u7b80\u5355\u6765\u8bf4, Spring \u662f\u4e00\u4e2a\u5f00\u53d1\u5e94\u7528\u6846\u67b6，<\/font>\u4ec0\u4e48\u6837\u7684\u6846\u67b6\u5462，\u6709\u8fd9\u4e48\u51e0\u4e2a\u6807\u7b7e：\u8f7b\u91cf\u7ea7\u3001\u4e00\u7ad9\u5f0f\u3001\u6a21\u5757\u5316，\u5176\u76ee\u7684\u662f\u7528\u4e8e\u7b80\u5316\u4f01\u4e1a\u7ea7\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1.<\/font><\/p>\n

                      Spring\u7684\u4e3b\u8981\u529f\u80fd: \u7ba1\u7406\u5bf9\u8c61，\u4ee5\u53ca\u5bf9\u8c61\u4e4b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb, \u9762\u5411\u5207\u9762\u7f16\u7a0b, \u6570\u636e\u5e93\u4e8b\u52a1\u7ba1\u7406, \u6570\u636e\u8bbf\u95ee, web\u6846\u67b6\u652f\u6301\u7b49.<\/font><\/p>\n

                      Spring\u5177\u5907\u9ad8\u5ea6\u53ef\u5f00\u653e\u6027, \u5e76\u4e0d\u5f3a\u5236\u4f9d\u8d56Spring, \u5f00\u53d1\u8005\u53ef\u4ee5\u81ea\u7531\u9009\u62e9Spring\u7684\u90e8\u5206\u6216\u8005\u5168\u90e8, Spring\u53ef\u4ee5\u65e0\u7f1d\u7ee7\u627f\u7b2c\u65b9\u6846\u67b6, \u6bd4\u5982\u6570\u636e\u8bbf\u95ee\u6846\u67b6(Hibernate , JPA), web\u6846\u67b6(\u5982Struts\u3001JSF)\u3002<\/font><\/p>\n

                      <\/font> Spring MVC: Spring MVC\u662fSpring\u7684\u4e00\u4e2a\u5b50\u6846\u67b6, <\/font> Spring\u8bde\u751f\u4e4b\u540e, \u5927\u5bb6\u89c9\u5f97\u5f88\u597d\u7528, \u4e8e\u662f\u6309\u7167MVC\u6a21\u5f0f\u8bbe\u8ba1\u4e86\u4e00\u4e2a MVC\u6846\u67b6(\u4e00\u4e9b\u7528Spring \u89e3\u8026\u7684\u7ec4\u4ef6), \u4e3b\u8981\u7528\u4e8e\u5f00\u53d1 Web \u5e94\u7528\u548c\u7f51\u7edc\u63a5\u53e3，\u6240\u4ee5, Spring MVC \u662f\u4e00\u4e2aWeb\u6846\u67b6. <\/font><\/p>\n

                      Spring MVC\u57fa\u4e8eSpring\u8fdb\u884c\u5f00\u53d1\u7684, \u5929\u751f\u7684\u4e0eSpring\u6846\u67b6\u96c6\u6210. \u53ef\u4ee5\u8ba9\u6211\u4eec\u66f4\u7b80\u6d01\u7684\u8fdb\u884cWeb\u5c42\u5f00\u53d1, \u652f\u6301\u7075\u6d3b\u7684 URL \u5230\u9875\u9762\u63a7\u5236\u5668\u7684\u6620\u5c04, \u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u7ea6\u5b9a\u5927\u4e8e\u914d\u7f6e\u7684\u5951\u7ea6\u5f0f\u7f16\u7a0b\u652f\u6301, \u975e\u5e38\u5bb9\u6613\u4e0e\u5176\u4ed6\u89c6\u56fe\u6846\u67b6\u96c6\u6210，\u5982 Velocity, FreeMarker\u7b49 <\/font><\/p>\n

                      Spring Boot: Spring Boot \u662f\u5bf9 Spring \u7684\u4e00\u4e2a\u5c01\u88c5, \u4e3a\u4e86\u7b80\u5316Spring\u5e94\u7528\u7684\u5f00\u53d1\u800c\u51fa\u73b0\u7684，\u4e2d\u5c0f\u578b\u4f01\u4e1a，\u6ca1\u6709\u6210\u672c\u7814\u7a76\u81ea\u5df1\u7684\u6846\u67b6, \u4f7f\u7528 Spring Boot \u53ef\u4ee5\u66f4\u52a0\u5feb\u901f\u7684\u642d\u5efa\u6846\u67b6, \u964d\u7ea7\u5f00\u53d1\u6210\u672c, \u8ba9\u5f00\u53d1\u4eba\u5458\u66f4\u52a0\u4e13\u6ce8\u4e8e Spring \u5e94\u7528\u7684\u5f00\u53d1，\u800c\u65e0\u9700\u8fc7\u591a\u5173\u6ce8 XML \u7684\u914d\u7f6e\u548c\u4e00\u4e9b\u5e95\u5c42\u7684\u5b9e\u73b0.<\/font><\/p>\n

                      Spring Boot \u662f\u4e2a\u811a\u624b\u67b6, \u63d2\u62d4\u5f0f\u642d\u5efa\u9879\u76ee, \u53ef\u4ee5\u5feb\u901f\u7684\u96c6\u6210\u5176\u4ed6\u6846\u67b6\u8fdb\u6765. \u6bd4\u5982\u60f3\u4f7f\u7528 SpringBoot \u5f00\u53d1 Web \u9879\u76ee, \u53ea\u9700\u8981\u5f15\u5165 Spring MVC\u6846\u67b6\u5373\u53ef, Web\u5f00\u53d1\u7684\u5de5\u4f5c\u662f SpringMVC \u5b8c\u6210\u7684, \u800c\u4e0d\u662f SpringBoot, \u60f3\u5b8c\u6210\u6570\u636e\u8bbf\u95ee, \u53ea\u9700\u8981\u5f15\u5165 Mybatis\u6846\u67b6 \u5373\u53ef.<\/font><\/p>\n

                      Spring Boot \u53ea\u662f\u8f85\u52a9\u7b80\u5316\u9879\u76ee\u5f00\u53d1\u7684, \u8ba9\u5f00\u53d1\u53d8\u5f97\u66f4\u52a0\u7b80\u5355, \u751a\u81f3\u4e0d\u9700\u8981\u989d\u5916\u7684 web\u670d\u52a1\u5668, \u76f4\u63a5\u751f\u6210 jar\u5305 \u6267\u884c\u5373\u53ef<\/font><\/p>\n

                      \u4e00\u53e5\u8bdd\u603b\u7ed3: Spring MVC \u548c Spring Boot\u90fd\u5c5e\u4e8eSpring，Spring MVC \u662f\u57fa\u4e8eSpring\u7684\u4e00\u4e2aMVC \u6846\u67b6，\u800c Spring Boot \u662f\u57fa\u4e8eSpring\u7684\u4e00\u5957\u5feb\u901f\u5f00\u53d1\u6574\u5408\u5305. <\/font><\/p>\n

                      5.2 \u5e38\u89c1\u6ce8\u89e3\u6709\u54ea\u4e9b? \u4f5c\u7528\u5206\u522b\u662f\u4ec0\u4e48? (\u5e38\u89c1\u9762\u8bd5\u9898) <\/font><\/h3>\n

                      <\/font> \u4e0a\u4e00\u7bc7\u6587\u7ae0\u548c\u8fd9\u7bc7\u6587\u7ae0\u8bb2\u8fc7\u7684\u6240\u6709\u6ce8\u89e3\u90fd\u662f\u7b54\u6848. <\/font> <\/font> <\/font><\/p>\n

                      <\/font> <\/font><\/p>\n

                      <\/font><\/h3>\n

                      <\/font> <\/font><\/p>\n

                      <\/font> <\/font><\/p>\n

                      <\/font><\/h4>\n

                      <\/font><\/p>\n

                      \u672c\u7bc7\u535a\u5ba2\u5230\u8fd9\u91cc\u5c31\u7ed3\u675f\u5566, \u611f\u8c22\u89c2\u770b \u2764\u2764\u2764<\/font> <\/font><\/p>\n

                      🐎\u671f\u5f85\u4e0e\u4f60\u7684\u4e0b\u4e00\u6b21\u76f8\u9047😊😊😊 <\/font><\/p>\n","protected":false},"excerpt":{"rendered":"

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