AOP：Aspect Oriented Programming，\u9762\u5411\u5207\u9762\u7f16\u7a0b\u3002<\/p>\n
AOP \u7684\u6838\u5fc3\u539f\u7406\u5c31\u662f\u52a8\u6001\u751f\u6210\u4ee3\u7406\u5bf9\u8c61，\u5728\u4e0d\u6539\u52a8\u539f\u4e1a\u52a1\u4ee3\u7801\u7684\u60c5\u51b5\u4e0b，\u901a\u8fc7\u4ee3\u7406\u53bb\u62e6\u622a\u76ee\u6807\u65b9\u6cd5，\u5728\u65b9\u6cd5\u524d\u540e\u63d2\u5165\u5207\u9762\u903b\u8f91\u3002<\/p>\n<\/p>\n
\u6838\u5fc3\u601d\u60f3：\u4e1a\u52a1\u4ee3\u7801\u53ea\u5173\u5fc3\u4e1a\u52a1，\u516c\u5171\u903b\u8f91\u4ea4\u7ed9\u5207\u9762\u3002<\/p>\n
\u5178\u578b\u901a\u7528\u573a\u666f：<\/p>\n
\u65e5\u5fd7\u8bb0\u5f55\u3001\u6027\u80fd\u7edf\u8ba1\u3001\u6743\u9650\u6821\u9a8c\u3001\u4e8b\u52a1\u63a7\u5236\u3001\u5f02\u5e38\u5904\u7406\u3001\u57cb\u70b9\u3002<\/p>\n
\u4f8b\u5b50：Spring \u7684 @Transactional \u5e95\u5c42\u5c31\u662f AOP\u3002<\/p>\n
JoinPoint \u8fde\u63a5\u70b9 \u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u88ab\u5207\u9762\u5207\u5165\u7684\u70b9\u3002<\/p>\n
Spring AOP \u53ea\u652f\u6301\u65b9\u6cd5\u7ea7\u522b\u7684\u8fde\u63a5\u70b9（\u53ea\u80fd\u62e6\u622a\u65b9\u6cd5\u6267\u884c，\u4e0d\u80fd\u62e6\u622a\u5b57\u6bb5\u3001\u6784\u9020\u51fd\u6570）\u3002<\/p>\n
\u7b80\u5355\u8bf4：Spring \u91cc，\u6240\u6709\u76ee\u6807\u5bf9\u8c61\u7684\u65b9\u6cd5\u90fd\u662f\u8fde\u63a5\u70b9\u3002<\/p>\n<\/li>\n
Pointcut \u5207\u70b9 \u5339\u914d\u89c4\u5219，\u7528\u6765\u7b5b\u9009\u54ea\u4e9b\u8fde\u63a5\u70b9\u9700\u8981\u88ab\u5207\u9762\u589e\u5f3a\u3002<\/p>\n
\u901a\u8fc7\u8868\u8fbe\u5f0f\u5339\u914d\u65b9\u6cd5，\u53ea\u6709\u5339\u914d\u4e0a\u7684\u65b9\u6cd5\u624d\u4f1a\u6267\u884c\u901a\u77e5\u3002<\/p>\n
JoinPoint \u662f\u5019\u9009\u70b9\u4f4d，Pointcut \u662f\u6311\u9009\u89c4\u5219\u3002<\/p>\n<\/li>\n
Weaving \u7ec7\u5165 \u628a\u5207\u9762\u903b\u8f91\u5e94\u7528\u5230\u76ee\u6807\u5bf9\u8c61，\u751f\u6210\u4ee3\u7406\u5bf9\u8c61\u7684\u8fc7\u7a0b\u3002 Spring AOP \u662f\u8fd0\u884c\u671f\u7ec7\u5165：\u7a0b\u5e8f\u8fd0\u884c\u7684\u65f6\u5019，\u52a8\u6001\u751f\u6210\u4ee3\u7406\u5bf9\u8c61\u3002<\/p>\n
AspectJ \u652f\u6301\u7f16\u8bd1\u671f\u7ec7\u5165\u3001\u7c7b\u52a0\u8f7d\u671f\u7ec7\u5165\u3002<\/p>\n
\u2705 @Aspect\u3001@Pointcut\u3001@Before\u3001@Around \u8fd9\u4e9b\u6ce8\u89e3\u5305\u540d\u662f org.aspectj.lang.annotation，\u6765\u81ea AspectJ，\u4f46\u662f\u6267\u884c\u5f15\u64ce\u662f Spring<\/p>\n<\/li>\n
\u26a0\ufe0f \u91cd\u70b9\u533a\u5206：Spring AOP \u2260 AspectJ<\/p>\n
Spring AOP \u4f7f\u7528 AspectJ \u7684\u5207\u70b9\u8bed\u6cd5\u548c\u6ce8\u89e3，\u4f46\u662f\u52a8\u6001\u4ee3\u7406\u5b9e\u73b0；<\/p>\n
AspectJ \u662f\u5b8c\u6574 AOP \u6846\u67b6，\u7f16\u8bd1\u671f\u4fee\u6539\u5b57\u8282\u7801\u3002<\/p>\n
\u7efc\u5408：<\/p>\n
\u5207\u9762 (Aspect) <\/span>\u5b9a\u4e49<\/span>\u5207\u5165\u70b9 (Pointcut) <\/span>\u4e0e<\/span>\u901a\u77e5 (Advice) <\/span>，<\/span><\/p>\n \u7ec7\u5165 (Weaving)\u00a0 <\/span>\u5207\u9762（Aspect）<\/span>\u5230<\/span>\u76ee\u6807 (Target)<\/span>\u7684<\/span>\u8fde\u63a5\u70b9 (JoinPoint) <\/span>\u5904，<\/span><\/p>\n \u6700\u7ec8\u751f\u6210<\/span>\u4ee3\u7406 (Proxy) <\/span>\u5bf9\u5916\u63d0\u4f9b\u8c03\u7528\u3002<\/span><\/p>\n<\/p>\n AOP \u6838\u5fc3\u7ec4\u4ef6\u5173\u7cfb\u56fe<\/p>\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 Aspect\u3010\u5207\u9762\u3011 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2193 Weaving\u3010\u7ec7\u5165\u3011（\u628a\u589e\u5f3a\u4ee3\u7801\u5d4c\u5165\u76ee\u6807）<\/p>\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 JoinPoint\u3010\u8fde\u63a5\u70b9\u3011 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2193<\/p>\n Proxy\u3010\u4ee3\u7406\u5bf9\u8c61\u3011（\u5305\u88c5Target，\u5bf9\u5916\u66b4\u9732）<\/p>\n \u4e3e\u4f8b\u5b50：<\/p>\n Aspect (\u4e8b\u52a1\u5207\u9762)<\/p>\n \u251c Pointcut：\u5339\u914d\u5e26\u6709 @Transactional \u6ce8\u89e3\u7684\u65b9\u6cd5<\/p>\n \u2514 Advice：\u4e8b\u52a1\u7ba1\u7406\u903b\u8f91（\u5f00\u542f\u3001\u63d0\u4ea4\u3001\u56de\u6eda）<\/p>\n Target：\u76ee\u6807\u7684 Service<\/p>\n JoinPoint：\u88ab\u5339\u914d\u5230\u7684\u5e26\u6ce8\u89e3\u7684\u65b9\u6cd5<\/p>\n Spring \u4f1a\u81ea\u52a8\u9009\u62e9\u4ee3\u7406\u65b9\u5f0f，\u4f18\u5148\u7ea7：\u4f18\u5148 JDK \u52a8\u6001\u4ee3\u7406，\u76ee\u6807\u7c7b\u6ca1\u6709\u5b9e\u73b0\u63a5\u53e3\u65f6\u4f7f\u7528 CGLIB<\/p>\n SpringBoot 2.x \u548c3.x\u9ed8\u8ba4\u5f00\u542f CGLIB \u4ee3\u7406<\/p>\n \u5e38\u89c1\u5751：<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u540c\u4e00\u4e2a\u7c7b\u5185\u65b9\u6cd5\u4e92\u76f8\u8c03\u7528 this.xxx()，\u4e0d\u4f1a\u89e6\u53d1 AOP \u589e\u5f3a！<\/p>\n \u539f\u56e0：<\/p>\n \u00a0\u00a0\u00a0this \u662f\u539f\u59cb\u76ee\u6807\u5bf9\u8c61，\u4e0d\u662f\u4ee3\u7406\u5bf9\u8c61\u3002\u8981\u81ea\u8c03\u7528\u89e6\u53d1 AOP，\u9700\u8981\u62ff\u5230\u4ee3\u7406\u5bf9\u8c61\u8c03\u7528\u3002<\/p>\n CGLIB \u4ee3\u7406：\u4f8b\u5b50 + \u573a\u666f<\/p>\n<\/p>\n 1. \u793a\u4f8b\u4ee3\u7801<\/p>\n \u539f\u59cb\u76ee\u6807\u7c7b（\u6ca1\u6709\u5b9e\u73b0\u4efb\u4f55\u63a5\u53e3）<\/p>\n \/\/ Target，\u6ca1\u6709\u63a5\u53e3，CGLIB\u53ef\u4ee5\u4ee3\u7406 \/\/ final\u65b9\u6cd5：\u4e0d\u80fd\u88ab\u5b50\u7c7b\u91cd\u5199！CGLIB\u65e0\u6cd5\u62e6\u622a\u8fd9\u4e2a\u65b9\u6cd5 CGLIB \u8fd0\u884c\u65f6\u52a8\u6001\u751f\u6210\u7684\u5b50\u7c7b（\u4f2a\u4ee3\u7801，\u6846\u67b6\u81ea\u52a8\u751f\u6210，\u6211\u4eec\u770b\u4e0d\u5230）<\/p>\n \/\/ CGLIB\u52a8\u6001\u751f\u6210：\u7ee7\u627fUserService @Override \/\/ \u8c03\u7528\u7236\u7c7b\u539f\u59cb\u4e1a\u52a1\u65b9\u6cd5 \/\/ \u3010Advice\u589e\u5f3a\u903b\u8f91\u3011\u540e\u7f6e\u901a\u77e5 \/\/ \u2757 deleteUser \u662ffinal，\u5b50\u7c7b\u4e0d\u80fd\u91cd\u5199，\u8fd9\u91cc\u65e0\u6cd5\u751f\u6210\u589e\u5f3a\u903b\u8f91 \u4f7f\u7528<\/p>\n \/\/ Spring\u62ff\u5230\u7684Bean，\u5176\u5b9e\u662f UserService$$CGLIB \u4ee3\u7406\u5bf9\u8c61 JDK \u52a8\u6001\u4ee3\u7406<\/p>\n \u524d\u63d0：<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u76ee\u6807\u7c7b\u5fc5\u987b\u81f3\u5c11\u5b9e\u73b0 1 \u4e2a\u63a5\u53e3\u3002<\/p>\n \u9650\u5236：<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53ea\u80fd\u62e6\u622a\u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u65b9\u6cd5；<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u76ee\u6807\u7c7b\u81ea\u5df1\u65b0\u589e\u7684\u3001\u4e0d\u5728\u63a5\u53e3\u91cc\u7684\u65b9\u6cd5，\u4ee3\u7406\u5bf9\u8c61\u8c03\u7528\u4e0d\u5230\u3002<\/p>\n 1. \u5b8c\u6574\u4ee3\u7801\u793a\u4f8b<\/p>\n \u2460 \u5148\u5b9a\u4e49\u63a5\u53e3（JDK \u4ee3\u7406\u79bb\u4e0d\u5f00\u8fd9\u4e2a）<\/p>\n public interface UserService { \u2461 \u76ee\u6807\u5b9e\u73b0\u7c7b（Target，\u5b9e\u73b0\u4e0a\u9762\u63a5\u53e3）<\/p>\n \/\/ \u76ee\u6807\u7c7b，\u5b9e\u73b0\u4e86UserService\u63a5\u53e3 @Override \/\/ \u8fd9\u4e2a\u65b9\u6cd5\u4e0d\u5728\u63a5\u53e3\u91cc\u9762！\u91cd\u70b9！ \u2462 JDK \u4ee3\u7406\u5de5\u5382，\u751f\u6210\u4ee3\u7406\u5bf9\u8c61<\/p>\n import java.lang.reflect.InvocationHandler; public class JdkProxyFactory { \/\/ \u6838\u5fc3：JDK Proxy.newProxyInstance \u2463 \u6d4b\u8bd5\u8c03\u7528<\/p>\n public class Test { proxy.addUser(); \/\/ \u2705 \u5728\u63a5\u53e3\u4e2d，\u8d70\u4ee3\u7406，\u89e6\u53d1\u589e\u5f3a<\/p>\n \/\/ proxy.hello(); \/\/ \u2757\u7f16\u8bd1\u62a5\u9519！ \u3010JDK\u4ee3\u7406\u524d\u7f6e\u3011\u65b9\u6cd5\u6267\u884c\u524d 2. JDK \u52a8\u6001\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u4f2a\u4ee3\u7801（\u91cd\u70b9\u7406\u89e3）<\/p>\n JDK \u5728\u8fd0\u884c\u65f6\u81ea\u52a8\u751f\u6210 $Proxy0，implements \u63a5\u53e3，\u4e0d\u662f extends \u76ee\u6807\u7c7b！<\/p>\n \/\/ JDK\u81ea\u52a8\u751f\u6210\u7684\u4ee3\u7406\u7c7b $Proxy0 public $Proxy0(InvocationHandler h) { @Override }<\/p>\n \u5173\u952e\u70b9：$Proxy0 implements UserService \u4ee3\u7406\u7c7b\u548cUserServiceImpl\u662f\u5e73\u7ea7，\u90fd\u5b9e\u73b0\u540c\u4e00\u4e2a\u63a5\u53e3，\u6ca1\u6709\u7236\u5b50\u7ee7\u627f\u5173\u7cfb！<\/p>\n \u00a0\u6269\u5c55：<\/p>\n Spring AOP \u5e95\u5c42\u6838\u5fc3\u662f\u4ee3\u7406\u6a21\u5f0f\u3002<\/p>\n \u4e24\u79cd\u4ee3\u7406\u5b9e\u73b0：JDK \u52a8\u6001\u4ee3\u7406\u548cCGLIB \u52a8\u6001\u4ee3\u7406<\/p>\n \u4ee3\u7406\u6a21\u5f0f\u6838\u5fc3\u610f\u56fe：\u63a7\u5236\u5bf9\u76ee\u6807\u5bf9\u8c61 (Target) \u7684\u8bbf\u95ee，\u5728\u4e0d\u4fee\u6539\u76ee\u6807\u7c7b\u6e90\u7801\u7684\u524d\u63d0\u4e0b，\u5728\u65b9\u6cd5\u524d\u540e\u589e\u52a0\u989d\u5916\u903b\u8f91（Advice，\u65e5\u5fd7\u3001\u4e8b\u52a1），\u5b8c\u7f8e\u5951\u5408 AOP \u7684\u9700\u6c42\u3002<\/p>\n \u8c03\u7528\u8005 \u2192 Proxy\u4ee3\u7406\u5bf9\u8c61（\u589e\u5f3a\u903b\u8f91） \u2192 Target\u76ee\u6807\u5bf9\u8c61（\u539f\u59cb\u4e1a\u52a1）<\/p>\n \u4f46\u662f：Spring AOP \u4e0d\u53ea\u7528\u4ee3\u7406\u6a21\u5f0f<\/p>\n \u8fd8\u7528\u5230\u522b\u7684\u8bbe\u8ba1\u6a21\u5f0f，\u4f8b\u5982：<\/p>\n \u7b80\u5355\u533a\u5206<\/p>\n \u5173\u4e8e\u8bbe\u8ba1\u6a21\u5f0f，\u6211\u5199\u8fc7\u4e00\u7bc7\u535a\u5ba2\u8be6\u89e3：23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u5b8c\u6574\u8bb2\u89e3（\u573a\u666f + \u4f8b\u5b50 + \u4ee3\u7801）<\/p>\n \u8bed\u6cd5：<\/p>\n execution(\u4fee\u9970\u7b26 \u8fd4\u56de\u503c \u5305\u540d.\u7c7b\u540d.\u65b9\u6cd5\u540d(\u53c2\u6570\u5217\u8868))<\/p>\n \u901a\u914d\u7b26\u8bf4\u660e：<\/p>\n \u793a\u4f8b：<\/p>\n \/\/ \u5339\u914d com.service \u5305\u4e0b\u6240\u6709\u7c7b\u7684\u6240\u6709public\u65b9\u6cd5 \/\/ \u5339\u914d com.service\u5305\u53ca\u5176\u5b50\u5305\u4e0b\u6240\u6709\u7c7b\u6240\u6709\u65b9\u6cd5 \/\/ \u5339\u914d UserService \u7c7b\u4e0b\u6240\u6709\u65b9\u6cd5 \/\/ \u5339\u914d save\u5f00\u5934\u7684\u65b9\u6cd5 \u9664\u4e86 execution，\u8fd8\u6709\u5176\u4ed6\u5207\u70b9\u6307\u793a\u5668：<\/p>\n @annotation \u5b9e\u6218\u573a\u666f：\u81ea\u5b9a\u4e49\u6ce8\u89e3@LogRecord，\u65b9\u6cd5\u6253\u4e0a\u6ce8\u89e3\u5c31\u81ea\u52a8\u8bb0\u5f55\u64cd\u4f5c\u65e5\u5fd7\u3002<\/p>\n @Around \u524d\u7f6e\u903b\u8f91 \u2192 @Before \u2192 \u76ee\u6807\u65b9\u6cd5\u6267\u884c \u2192 @AfterReturning \u2192 @After \u2192 @Around \u540e\u7f6e\u903b\u8f91<\/p>\n @Around \u524d\u7f6e\u903b\u8f91 \u2192 @Before \u2192 \u76ee\u6807\u65b9\u6cd5\u629b\u51fa\u5f02\u5e38 \u2192 @AfterThrowing \u2192 @After<\/p>\n @AfterReturning \u4e0d\u4f1a\u6267\u884c，\u73af\u7ed5\u901a\u77e5\u91cc\u5982\u679c\u4e0d catch \u5f02\u5e38，\u5f02\u5e38\u7ee7\u7eed\u5411\u4e0a\u629b\u51fa\u3002<\/p>\n \u591a\u4e2a\u5207\u9762\u65f6，\u53ef\u4ee5\u7528@Order(int)\u6307\u5b9a\u5207\u9762\u4f18\u5148\u7ea7，\u6570\u5b57\u8d8a\u5c0f\u4f18\u5148\u7ea7\u8d8a\u9ad8\u3002<\/p>\n \u9ad8\u4f18\u5148\u7ea7\u5207\u9762：\u5148\u8fdb\u5148\u51fa，\u540e\u8fdb\u5148\u51fa\u3002<\/p>\n \u5207\u9762 A order=1，\u5207\u9762 B order=2：<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0A \u524d\u7f6e \u2192<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0B \u524d\u7f6e \u2192 \u76ee\u6807\u65b9\u6cd5 \u2192 B \u8fd4\u56de \/ \u540e\u7f6e \u2192<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0A \u8fd4\u56de \/ \u540e\u7f6e<\/p>\n \u5bf9\u5e94\u4e1a\u52a1\u573a\u666f\u7406\u89e3<\/span><\/p>\n \u5047\u8bbe\u8fd9\u4e2a\u5207\u9762\u505a\u63a5\u53e3\u8017\u65f6\u7edf\u8ba1 + \u65e5\u5fd7\u8bb0\u5f55<\/p>\n \u6982\u62ec：<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7edf\u8ba1\u63a5\u53e3\u8017\u65f6\u653e\u5728 Around，<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53c2\u6570\u6821\u9a8c\u653e Before，<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u6210\u529f\u57cb\u70b9 AfterReturning，<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8d44\u6e90\u91ca\u653e\u653e After\u3002<\/p>\n <!– spring-boot-starter-aop \u81ea\u5e26aspectj\u6ce8\u89e3\u652f\u6301 –> @Service @Aspect \/\/ \u5b9a\u4e49\u5207\u70b9：\u5339\u914dUserService\u6240\u6709\u65b9\u6cd5 \/\/ \u524d\u7f6e\u901a\u77e5 \/\/ \u8fd4\u56de\u901a\u77e5 \/\/ \u5f02\u5e38\u901a\u77e5 \/\/ \u6700\u7ec8\u901a\u77e5 \/\/ \u73af\u7ed5\u901a\u77e5，ProceedingJoinPoint\u53ea\u80fd\u7528\u5728Around \u8c03\u7528 userService.addUser("\u5f20\u4e09")，\u8f93\u51fa\u987a\u5e8f：<\/p>\n \u3010\u73af\u7ed5\u901a\u77e5\u3011\u65b9\u6cd5\u6267\u884c\u524d ProceedingJoinPoint \u662f JoinPoint \u5b50\u7c7b，\u53ea\u6709\u73af\u7ed5\u901a\u77e5\u53ef\u4ee5\u4f7f\u7528，\u8c03\u7528proceed()\u624d\u4f1a\u6267\u884c\u76ee\u6807\u65b9\u6cd5；<\/p>\n \u53ef\u4ee5\u4e0d\u8c03\u7528，\u76f4\u63a5\u62e6\u622a，\u4e5f\u53ef\u4ee5\u591a\u6b21\u8c03\u7528\u3002<\/p>\n \u4e1a\u52a1\u573a\u666f\u9700\u6c42<\/p>\n \u540e\u53f0\u7ba1\u7406\u7cfb\u7edf，\u9700\u8981\u8bb0\u5f55\u7ba1\u7406\u5458\u64cd\u4f5c\u65e5\u5fd7：<\/p>\n \u8981\u6c42：<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e1a\u52a1\u4ee3\u7801\u5b8c\u5168\u4e0d\u5199\u65e5\u5fd7\u76f8\u5173\u4ee3\u7801，\u7528 AOP \u6a2a\u5207\u7edf\u4e00\u5b9e\u73b0\u3002<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7528\u5230\u5168\u90e8 AOP \u7ec4\u4ef6：\u5207\u9762 Aspect\u3001\u5207\u70b9 Pointcut\u3001\u901a\u77e5 Advice\u3001\u8fde\u63a5\u70b9 JoinPoint<\/p>\n \u7528\u6765\u6807\u8bb0\u9700\u8981\u8bb0\u5f55\u64cd\u4f5c\u65e5\u5fd7\u7684\u63a5\u53e3<\/p>\n \/** \u64cd\u4f5c\u65e5\u5fd7\u4fdd\u5b58\u5bf9\u8c61<\/p>\n @Data \u6838\u5fc3！<\/span>\u5305\u542b\u5207\u70b9 + 5 \u79cd\u901a\u77e5<\/p>\n import org.aspectj.lang.JoinPoint; @Aspect \/\/ ========== \u5207\u70b9 Pointcut ========== \/\/ ========== \u73af\u7ed5\u901a\u77e5 Around（\u5305\u88f9\u6574\u4e2a\u76ee\u6807\u65b9\u6cd5） ========== Object result; \/\/ ========== \u524d\u7f6e\u901a\u77e5 Before ========== \/\/ ========== \u6b63\u5e38\u8fd4\u56de\u901a\u77e5 AfterReturning ========== \/\/ ========== \u5f02\u5e38\u901a\u77e5 AfterThrowing ========== \/\/ ========== \u6700\u7ec8\u901a\u77e5 After（\u7c7b\u4f3cfinally，\u65e0\u8bba\u6210\u529f\u5931\u8d25\u90fd\u6267\u884c） ========== \/\/ \u6a21\u62df\u5165\u5e93 @RestController \/\/ \u6253\u4e0a\u6ce8\u89e3，AOP\u5207\u9762\u4f1a\u62e6\u622a\u8fd9\u4e2a\u65b9\u6cd5 \/\/ \u6a21\u62df\u5f02\u5e38\u573a\u666f \u8f93\u51fa\u987a\u5e8f（\u5bf9\u5e94 AOP \u901a\u77e5\u987a\u5e8f）<\/p>\n ==== @Before \u6267\u884c：\u51c6\u5907\u6267\u884c\u3010\u65b0\u589e\u7528\u6237\u3011\u64cd\u4f5c ====<\/p>\n ===== \u76ee\u6807\u65b9\u6cd5：\u65b0\u589e\u7528\u6237\u4e1a\u52a1\u903b\u8f91\u6267\u884c =====<\/p>\n ==== @AfterReturning \u6267\u884c：\u64cd\u4f5c\u3010\u65b0\u589e\u7528\u6237\u3011\u6210\u529f，\u8fd4\u56de\u503c：\u7528\u6237\u65b0\u589e\u6210\u529f, name:zhangsan<\/p>\n ==== @After \u6267\u884c：\u64cd\u4f5c\u3010\u65b0\u589e\u7528\u6237\u3011\u6d41\u7a0b\u7ed3\u675f（finally） ==== \u5b8c\u6574\u6267\u884c\u94fe\u8def：<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0@Around \u524d\u7f6e\u4ee3\u7801 \u2192 @Before \u2192 \u76ee\u6807\u65b9\u6cd5 \u2192 @AfterReturning \u2192 @After \u2192 Around \u4e2d proceed \u6267\u884c\u5b8c\u6bd5，\u8fdb\u5165 finally \u4fdd\u5b58\u65e5\u5fd7<\/p>\n \u573a\u666f 2：\u8c03\u7528 \/user\/delete \u3010\u629b\u51fa\u5f02\u5e38\u3011<\/p>\n ==== @Before \u6267\u884c：\u51c6\u5907\u6267\u884c\u3010\u5220\u9664\u7528\u6237\u3011\u64cd\u4f5c ====<\/p>\n ===== \u76ee\u6807\u65b9\u6cd5：\u5220\u9664\u7528\u6237\u4e1a\u52a1，\u629b\u51fa\u5f02\u5e38 =====<\/p>\n ==== @AfterThrowing \u6267\u884c：\u64cd\u4f5c\u3010\u5220\u9664\u7528\u6237\u3011\u53d1\u751f\u5f02\u5e38：\u7528\u6237\u4e0d\u5b58\u5728，\u5220\u9664\u5931\u8d25<\/p>\n ==== @After \u6267\u884c：\u64cd\u4f5c\u3010\u5220\u9664\u7528\u6237\u3011\u6d41\u7a0b\u7ed3\u675f（finally） ==== \u5f02\u5e38\u94fe\u8def：<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0@Around \u524d\u7f6e \u2192 @Before \u2192 \u76ee\u6807\u629b\u5f02\u5e38 \u2192 @AfterThrowing \u2192 @After \u2192 Around \u6355\u83b7\u5f02\u5e38，\u8bb0\u5f55\u9519\u8bef\u65e5\u5fd7<\/p>\n \u2757\ufe0f\u91cd\u70b9：\u5f02\u5e38\u65f6 AfterReturning \u4e0d\u4f1a\u6267\u884c！<\/p>\n \u5bf9\u5e94 AOP \u6838\u5fc3\u540d\u8bcd\u5bf9\u7167<\/p>\n \u7528\u540e\u53f0\u64cd\u4f5c\u65e5\u5fd7\u8fd9\u4e2a\u573a\u666f\u7406\u89e3 AOP\u3002<\/p>\n \u9700\u6c42\u662f\u7edf\u4e00\u8bb0\u5f55\u7ba1\u7406\u5458\u64cd\u4f5c，\u4e0d\u60f3\u5728\u6bcf\u4e2a\u63a5\u53e3\u5199\u65e5\u5fd7\u4ee3\u7801\u3002<\/p>\n @Service \u89e3\u51b3：<\/p>\n Spring AOP \u53ea\u80fd\u62e6\u622apublic \u65b9\u6cd5，private \u65b9\u6cd5\u4e0d\u4f1a\u88ab\u4ee3\u7406\u3002<\/p>\n CGLIB \u751f\u6210\u5b50\u7c7b，final \u4e0d\u80fd\u91cd\u5199，\u589e\u5f3a\u5931\u6548\u3002<\/p>\n \u5e95\u5c42\u5c31\u662f AOP，\u53ea\u80fd\u62e6\u622a public \u65b9\u6cd5\u3002<\/p>\n \u8bb0\u4f4f @Order：\u6570\u5b57\u8d8a\u5c0f，\u5207\u9762\u8d8a\u5148\u8fdb\u5165，\u6700\u540e\u9000\u51fa\u3002<\/p>\n IOC：Inversion of Control，\u63a7\u5236\u53cd\u8f6c<\/p>\n \u662f\u4e00\u79cd\u8bbe\u8ba1\u601d\u60f3，\u4e0d\u662f Spring \u72ec\u6709\u7684，Spring \u662f IOC \u601d\u60f3\u7684\u5b9e\u73b0\u6846\u67b6\u3002<\/p>\n \u4f20\u7edf\u5f00\u53d1：\u5f00\u53d1\u8005 new \u5bf9\u8c61，\u4e3b\u52a8\u521b\u5efa\u3001\u7ba1\u7406\u5bf9\u8c61\u7684\u4f9d\u8d56（\u63a7\u5236\u6743\u5728\u7a0b\u5e8f\u5458\u624b\u4e0a）<\/p>\n<\/p>\n IOC：\u628a\u5bf9\u8c61\u521b\u5efa\u3001\u9500\u6bc1\u3001\u4f9d\u8d56\u6ce8\u5165\u7684\u63a7\u5236\u6743\u4ea4\u7ed9\u5bb9\u5668，\u7a0b\u5e8f\u5458\u4e0d\u518d\u624b\u52a8 new \u5bf9\u8c61；\u7531\u5bb9\u5668\u6765\u5b9e\u4f8b\u5316\u5bf9\u8c61\u3001\u88c5\u914d\u4f9d\u8d56\u3002<\/p>\n \u63a7\u5236\u6743\u4ece\u4ee3\u7801\u53cd\u8f6c\u5230\u5bb9\u5668，\u6240\u4ee5\u53eb\u63a7\u5236\u53cd\u8f6c\u3002<\/p>\n DI（Dependency Injection，\u4f9d\u8d56\u6ce8\u5165）：\u662f IOC \u601d\u60f3\u6700\u4e3b\u6d41\u7684\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n IOC \u662f\u601d\u60f3，DI \u662f\u624b\u6bb5\u3002<\/p>\n \u5bb9\u5668\u5728\u521b\u5efa Bean \u7684\u65f6\u5019，\u81ea\u52a8\u628a\u5bf9\u8c61\u9700\u8981\u7684\u4f9d\u8d56\u6ce8\u5165\u8fdb\u53bb\u3002（\u770b\u8fd9\u4e2a\u5177\u4f53\u7684\u4e1a\u52a1\u573a\u666f\u4f8b\u5b50）<\/span><\/p>\n \u4e00\u53e5\u8bdd\u7406\u89e3\u539f\u53e5：<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7a0b\u5e8f\u5458\u4e0d\u518d\u81ea\u5df1new A()\u3001new B()，\u4e0d\u518d\u624b\u52a8\u7ed9 A \u8bbe\u7f6e B；<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Spring \u5bb9\u5668\u8d1f\u8d23 new Bean，\u521b\u5efa A \u8fd9\u4e2a Bean \u7684\u540c\u65f6，\u81ea\u52a8\u627e\u5230 A \u9700\u8981\u7684 B，\u628a B \u585e\u7ed9 A，\u8fd9\u4e2a\u52a8\u4f5c\u5c31\u662f DI\u3002<\/p>\n \u4e1a\u52a1\u573a\u666f<\/span><\/p>\n \u7535\u5546\u4e0b\u5355\u573a\u666f： OrderService（\u4e0b\u5355）\u9700\u8981\u8c03\u7528 PayService（\u652f\u4ed8）\u3002 OrderService \u4f9d\u8d56 PayService<\/span>\u3002<\/p>\n<\/p>\n Step1：\u4e24\u4e2aService\u4ea4\u7ed9 Spring \u7ba1\u7406，\u53d8\u6210 Bean<\/p>\n @Service @Service \/\/ \u2705 \u6784\u9020\u5668\u6ce8\u5165（\u63a8\u8350） public void createOrder(Long orderId, BigDecimal money){ Step2：Spring \u5bb9\u5668\u5185\u90e8\u6267\u884c\u6d41\u7a0b（\u5bf9\u5e94\u90a3\u53e5\u8bdd）<\/p>\n @SpringBootApplication \u8f93\u51fa：<\/p>\n \u521b\u5efa\u8ba2\u5355 \u539f\u53e5\u7ffb\u8bd1\u5230\u672c\u6848\u4f8b：<\/p>\n \u5bb9\u5668\u5728\u521b\u5efa OrderService Bean \u7684\u65f6\u5019，\u81ea\u52a8\u628a\u5b83\u9700\u8981\u7684\u4f9d\u8d56 PayService \u6ce8\u5165\u8fdb\u53bb\u3002<\/p>\n \u603b\u7ed3：<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IOC = \u628a\u5bf9\u8c61\u751f\u547d\u5468\u671f\u548c\u4f9d\u8d56\u4ea4\u7ed9 Spring \u5bb9\u5668\u7ba1\u7406；<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0DI = \u5bb9\u5668\u81ea\u52a8\u7ed9 Bean \u6ce8\u5165\u4f9d\u8d56\u5c5e\u6027\u3002<\/p>\n \u5173\u952e\u8bcd\u62c6\u89e3：<\/p>\n \u53cd\u4f8b（\u4f20\u7edf\u5199\u6cd5，\u7d27\u8026\u5408）<\/p>\n public class UserController { IOC \u5199\u6cd5：<\/p>\n public class UserController { Spring IOC \u5bb9\u5668\u9876\u5c42\u63a5\u53e3\u6709\u4e24\u4e2a：<\/p>\n \u533a\u5206：<\/p>\n BeanFactory \u662f\u7b80\u964b\u7248 IOC；<\/p>\n ApplicationContext \u662f\u589e\u5f3a\u7248 BeanFactory\u3002<\/p>\n \u5bb9\u5668\u4e2d\u7ba1\u7406\u7684\u6240\u6709\u5bf9\u8c61\u53eb\u505a Bean\u3002<\/p>\n Bean \u7684\u5b9a\u4e49\u4fe1\u606f\u5b58\u5728 BeanDefinition（Bean \u5b9a\u4e49）：\u4fdd\u5b58 Bean \u7684 class \u7c7b\u578b\u3001\u4f5c\u7528\u57df\u3001\u61d2\u52a0\u8f7d\u3001\u521d\u59cb\u5316\u65b9\u6cd5\u3001\u9500\u6bc1\u65b9\u6cd5\u3001\u4f9d\u8d56\u4fe1\u606f\u7b49\u3002<\/p>\n BeanDefinition \u2260 Bean<\/p>\n \u5b9e\u4f8b BeanDefinition \u662f Bean \u7684\u5143\u6570\u636e\u63cf\u8ff0；<\/p>\n \u5bb9\u5668\u6839\u636e BeanDefinition \u53bb\u5b9e\u4f8b\u5316 Bean \u5bf9\u8c61\u3002<\/p>\n \u26a0\ufe0f \u5355\u4f8b Bean \u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168！\u591a\u7ebf\u7a0b\u5e76\u53d1\u4fee\u6539\u6210\u5458\u53d8\u91cf\u4f1a\u6709\u5e76\u53d1\u95ee\u9898\u3002<\/p>\n \u6269\u5c55：<\/p>\n<\/p>\n Q：@Autowired private UserService userService; \u8fd9\u4e2a UserService \u662f\u5168\u5c40\u552f\u4e00\u7684\u5417？<\/p>\n<\/p>\n A：<\/p>\n \u662f，\u56e0\u4e3aSpring Bean\u9ed8\u8ba4\u662f\u5168\u5c40\u552f\u4e00，\u56e0\u4e3a Spring Bean \u9ed8\u8ba4\u662f singleton（\u5355\u4f8b）\u3002<\/p>\n @Service \u6ce8\u89e3\u7684 Bean \u9ed8\u8ba4 @Scope("singleton")<\/p>\n Q：\u8fd9\u6837\u7684\u597d\u5904\u662f？<\/p>\n A：<\/p>\n 1. \u51cf\u5c11\u5bf9\u8c61\u521b\u5efa\u3001\u9500\u6bc1\u5f00\u9500，\u63d0\u5347\u6027\u80fd<\/span><\/p>\n \u5bb9\u5668\u542f\u52a8\u9636\u6bb5\u4e00\u6b21\u6027 new \u4e00\u6b21 UserServiceImpl； Controller\u3001\u5176\u4ed6 Service \u591a\u5904@Autowired\u6ce8\u5165\u65f6，\u4e0d\u518d\u91cd\u590d new \u5bf9\u8c61，\u76f4\u63a5\u8fd4\u56de\u540c\u4e00\u4e2a\u5bf9\u8c61\u5f15\u7528\u3002<\/p>\n \u5982\u679c\u662f prototype，\u6bcf\u6b21\u6ce8\u5165\u90fd new，\u9891\u7e41\u521b\u5efa\u5bf9\u8c61\u3001\u89e6\u53d1 GC，\u589e\u52a0 CPU \u4e0e GC \u538b\u529b\u3002<\/p>\n<\/p>\n 2. \u8282\u7701\u5806\u5185\u5b58<\/span><\/p>\n \u6574\u4e2a\u5bb9\u5668\u53ea\u4fdd\u7559\u4e00\u4efd UserServiceImpl \u5b9e\u4f8b\u3002<\/p>\n \u9879\u76ee\u91cc\u5927\u91cf Service\u3001Controller\u3001Dao \u90fd\u590d\u7528\u8fd9\u4e00\u4e2a\u5bf9\u8c61，\u51cf\u5c11\u5806\u4e2d\u5bf9\u8c61\u6570\u91cf\u3002<\/p>\n<\/p>\n 3. \u4e00\u6b21\u6027\u5b8c\u6210 Bean \u6240\u6709\u540e\u7f6e\u5904\u7406（AOP \u7ec7\u5165\u3001\u4f9d\u8d56\u6ce8\u5165\u3001\u521d\u59cb\u5316）<\/span><\/p>\n \u53ea\u505a\u4e00\u6b21： \u5b9e\u4f8b\u5316 \u2192 \u586b\u5145\u4f9d\u8d56（@Autowired） \u2192 \u521d\u59cb\u5316\u56de\u8c03 \u2192 AOP \u4ee3\u7406\u7ec7\u5165（\u751f\u6210 Proxy）<\/p>\n \u91cd\u70b9！\u4e8b\u52a1\u5207\u9762@Transactional\u7684\u4ee3\u7406\u53ea\u751f\u6210\u4e00\u6b21\u3002<\/p>\n \u5982\u679c\u662f prototype，\u6bcf\u6b21\u83b7\u53d6 Bean \u90fd\u8981\u91cd\u65b0\u505a\u4e00\u904d\u4ee3\u7406\u3001\u521d\u59cb\u5316，\u5f00\u9500\u5f88\u5927\u3002<\/p>\n 4. \u5bb9\u5668\u7f13\u5b58，\u83b7\u53d6 Bean \u901f\u5ea6\u5feb<\/span><\/p>\n \u5b9e\u4f8b\u521b\u5efa\u5b8c\u6210\u540e\u653e\u5165\u5bb9\u5668\u5355\u4f8b\u6c60（singletonObjects Map），\u540e\u7eed getBean \/ \u6ce8\u5165\u76f4\u63a5\u4ece Map \u62ff\u5f15\u7528，\u4e0d\u7528\u53cd\u5c04\u521b\u5efa\u5bf9\u8c61\u3002<\/p>\n<\/p>\n 5. \u9002\u5408\u65e0\u72b6\u6001\u4e1a\u52a1\u5bf9\u8c61（Service \u5929\u7136\u6ee1\u8db3）<\/span><\/p>\n UserServiceImpl \u91cc\u9762\u4e00\u822c\u4e0d\u5b58\u653e\u53ef\u53d8\u6210\u5458\u53d8\u91cf，\u53ea\u6709\u4e1a\u52a1\u65b9\u6cd5；\u65b9\u6cd5\u5185\u5c40\u90e8\u53d8\u91cf\u5728\u6808\u4e0a，\u591a\u7ebf\u7a0b\u4e92\u4e0d\u5e72\u6270，\u5929\u7136\u65e0\u72b6\u6001，\u53ef\u4ee5\u5b89\u5168\u590d\u7528\u540c\u4e00\u4e2a\u5b9e\u4f8b\u3002<\/p>\n<\/p>\n \u6982\u62ec：<\/span><\/p>\n @Service \u9ed8\u8ba4 singleton，\u5bb9\u5668\u542f\u52a8\u4ec5\u5b9e\u4f8b\u5316\u4e00\u6b21，\u6240\u6709\u6ce8\u5165\u590d\u7528\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n \u51cf\u5c11\u5bf9\u8c61\u521b\u5efa GC \u5f00\u9500\u3001\u8282\u7701\u5806\u5185\u5b58\u3002<\/p>\n \u4f9d\u8d56\u6ce8\u5165\u3001AOP \u4ee3\u7406\u3001\u521d\u59cb\u5316\u53ea\u6267\u884c\u4e00\u6b21，\u63d0\u5347\u6027\u80fd\u3002<\/p>\n Service \u672c\u8eab\u65e0\u72b6\u6001，\u9002\u5408\u591a\u7ebf\u7a0b\u590d\u7528\u3002<\/p>\n<\/p>\n （\u5173\u4e8eGC\u5f00\u9500\u548c\u8282\u7701\u5806\u5185\u5b58，\u6211\u5199\u8fc7\u4e00\u7bc7\u535a\u5ba2\u8be6\u7ec6\u8bb2\u89e3\u4e86\u8fd9\u4e2a\u8fc7\u7a0b：\u4e00\u6587\u8bb2\u61c2JVM\u4e0e\u8c03\u4f18）<\/p>\n<\/p>\n Q：\u65e2\u7136\u590d\u7528\u540c\u4e00\u4e2a\u5bf9\u8c61，\u90a3\u591a\u7ebf\u7a0b\u5e76\u53d1\u8bbf\u95ee UserServiceImpl \u4f1a\u4e0d\u4f1a\u7ebf\u7a0b\u4e0d\u5b89\u5168？<\/p>\n A：\u4e0d\u4f1a，\u524d\u63d0\u662f\u4e0d\u5b9a\u4e49\u53ef\u53d8\u6210\u5458\u53d8\u91cf\u3002<\/p>\n Spring MVC \u6bcf\u4e2a\u8bf7\u6c42\u662f\u72ec\u7acb\u7ebf\u7a0b，\u8c03\u7528 service \u65b9\u6cd5\u65f6，\u65b9\u6cd5\u5185\u7684\u5c40\u90e8\u53d8\u91cf\u5b58\u653e\u5728\u7ebf\u7a0b\u6808，\u7ebf\u7a0b\u9694\u79bb；\u53ea\u8981\u4e0d\u5728 Service \u91cc\u5199\u53ef\u4fee\u6539\u7684\u6210\u5458\u5b57\u6bb5，\u5c31\u6ca1\u6709\u5e76\u53d1\u95ee\u9898\u3002<\/p>\n<\/p>\n Q：\u4ec0\u4e48\u65f6\u5019\u4e0d\u80fd\u7528 singleton，\u8981\u6539\u6210 prototype？<\/p>\n A：\u5f53 Bean \u9700\u8981\u4fdd\u5b58\u53ef\u53d8\u7684\u6210\u5458\u72b6\u6001，\u6bcf\u4e2a\u8c03\u7528\u8005\u5fc5\u987b\u62e5\u6709\u72ec\u7acb\u5bf9\u8c61，\u6bd4\u5982\u6709\u72b6\u6001\u7684\u4e1a\u52a1\u6a21\u578b\u5bf9\u8c61\u3002<\/p>\n \u5bb9\u5668\u8c03\u7528\u7c7b\u7684\u6784\u9020\u65b9\u6cd5，\u628a\u4f9d\u8d56\u4f20\u5165\u3002<\/p>\n @Service \/\/ \u6784\u9020\u6ce8\u5165，Spring4.3+\u5355\u6784\u9020\u5668\u53ef\u7701\u7565@Autowired \u2705 \u4f18\u70b9：<\/p>\n \u5bb9\u5668\u8c03\u7528 set \u65b9\u6cd5\u6ce8\u5165\u5c5e\u6027\u3002<\/p>\n @Service @Autowired \u2705 \u9002\u5408：\u53ef\u9009\u4f9d\u8d56，\u53ef\u5728 Bean \u521b\u5efa\u540e\u4fee\u6539\u4f9d\u8d56\u3002<\/p>\n @Service \u274c \u7f3a\u70b9：<\/p>\n Spring \u5b98\u65b9\u4e0d\u63a8\u8350\u5b57\u6bb5\u6ce8\u5165，\u4f46\u662f\u4e1a\u52a1\u4ee3\u7801\u5199\u7684\u6700\u591a\u3002<\/p>\n \u8fd9\u4e2a\u6211\u4e13\u95e8\u5199\u4e86\u4e00\u7bc7\u535a\u5ba2\u8be6\u89e3，\u975e\u5e38\u8be6\u7ec6：\u4e00\u6587\u770b\u61c2@Autowired \u548c @Resource\u533a\u522b（\u9644\u4ee3\u7801）<\/p>\n \u4ee5\u5355\u4f8b\u3001\u975e\u61d2\u52a0\u8f7d Bean\u4e3a\u4f8b：<\/p>\n \u2728 AOP \u4ee3\u7406\u5bf9\u8c61\u5c31\u662f\u5728\u8fd9\u91cc\u751f\u6210\u3002<\/p>\n \u5982\u679c\u9700\u8981 AOP \u589e\u5f3a，\u8fd4\u56de\u4ee3\u7406\u5bf9\u8c61，\u5426\u5219\u8fd4\u56de\u539f\u5bf9\u8c61\u3002<\/p>\n<\/li>\n \u603b\u7ed3：\u5b9e\u4f8b\u5316 \u2192 \u586b\u5145\u5c5e\u6027 \u2192 Aware \u2192 \u524d\u7f6e\u5904\u7406\u5668 \u2192 \u521d\u59cb\u5316 \u2192 \u540e\u7f6e\u5904\u7406\u5668 (AOP) \u2192 \u4f7f\u7528 \u2192 \u9500\u6bc1<\/p>\n A \u91cc\u9762\u4f9d\u8d56 B，B \u91cc\u9762\u4f9d\u8d56 A\u3002<\/p>\n @Component \u2705 \u5355\u4f8b Bean + setter \/ \u5b57\u6bb5\u6ce8\u5165：\u53ef\u4ee5\u89e3\u51b3<\/p>\n \u274c \u6784\u9020\u5668\u6ce8\u5165\u7684\u5faa\u73af\u4f9d\u8d56：\u65e0\u6cd5\u89e3\u51b3，\u76f4\u63a5\u629b\u5f02\u5e38<\/p>\n \u274c prototype \u539f\u578b Bean：\u5b8c\u5168\u65e0\u6cd5\u89e3\u51b3<\/p>\n Spring \u5355\u4f8b\u6c60\u4e09\u7ea7\u7f13\u5b58：<\/p>\n \u89e3\u51b3\u6d41\u7a0b\u7b80\u8ff0：<\/p>\n \u91cd\u70b9：A \u521d\u59cb\u5316\u9636\u6bb5，AOP \u540e\u7f6e\u5904\u7406\u5668\u4f1a\u5224\u65ad\u8be5 Bean \u5df2\u7ecf\u63d0\u524d\u751f\u6210\u8fc7\u4ee3\u7406（earlyProxyReferences \u6807\u8bb0），\u4e0d\u518d\u91cd\u590d\u521b\u5efa\u4ee3\u7406\u3002<\/p>\n<\/li>\n \u5173\u952e\u70b9：\u63d0\u524d\u66b4\u9732\u534a\u6210\u54c1 Bean \u7684\u5f15\u7528\u3002<\/p>\n \u5982\u679c\u662f\u6784\u9020\u6ce8\u5165：\u5b9e\u4f8b\u5316\u548c\u5c5e\u6027\u6ce8\u5165\u5728\u6784\u9020\u65b9\u6cd5\u9636\u6bb5，\u5bf9\u8c61\u8fd8\u6ca1 new \u51fa\u6765，\u65e0\u6cd5\u63d0\u524d\u66b4\u9732\u5f15\u7528，\u6240\u4ee5\u65e0\u6cd5\u89e3\u51b3\u3002<\/p>\n \u5f88\u591a\u4eba\u8bef\u533a：\u4e09\u7ea7\u7f13\u5b58\u5c31\u662f\u4e3a\u4e86\u89e3\u5faa\u73af\u4f9d\u8d56\u3002<\/p>\n \u4e0d\u5b8c\u5168\u5bf9，\u4e09\u7ea7\u7f13\u5b58\u4e3b\u8981\u662f\u4e3a\u4e86\u5faa\u73af\u4f9d\u8d56\u4e0b\u540c\u65f6\u652f\u6301 AOP \u4ee3\u7406\u3002<\/p>\n \u5982\u679c\u6ca1\u6709 AOP，\u4e8c\u7ea7\u7f13\u5b58\u5c31\u8db3\u591f\u3002<\/p>\n @Configuration IOC \u662f\u63a7\u5236\u53cd\u8f6c\u601d\u60f3；<\/p>\n DI \u4f9d\u8d56\u6ce8\u5165\u662f IOC \u7684\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n BeanFactory \u61d2\u52a0\u8f7d，\u57fa\u7840 Bean \u83b7\u53d6；<\/p>\n ApplicationContext \u662f\u5b50\u63a5\u53e3，\u542f\u52a8\u9884\u5b9e\u4f8b\u5355\u4f8b Bean，\u6269\u5c55\u4e8b\u4ef6\u3001\u56fd\u9645\u5316\u7b49\u80fd\u529b\u3002<\/p>\n \u9ed8\u8ba4\u5bb9\u5668\u5237\u65b0\u65f6\u63d0\u524d\u5b9e\u4f8b\u5316；\u52a0\u4e0a@Lazy\u61d2\u52a0\u8f7d，\u7b2c\u4e00\u6b21 getBean \u624d\u521b\u5efa\u3002<\/p>\n \u6784\u9020\u6ce8\u5165\u5b98\u65b9\u63a8\u8350，\u4fdd\u8bc1\u4f9d\u8d56\u5fc5\u586b；setter \u9002\u5408\u53ef\u9009\u4f9d\u8d56；\u5b57\u6bb5\u6ce8\u5165\u53ef\u8bfb\u6027\u5dee，\u4e0d\u63a8\u8350\u3002<\/p>\n Bean \u540e\u7f6e\u5904\u7406\u5668，\u5728 Bean \u521d\u59cb\u5316\u524d\u540e\u62e6\u622a；AOP \u4ee3\u7406\u751f\u6210\u5c31\u5728postProcessAfterInitialization\u3002<\/p>\n @Component \u6253\u5728\u7c7b\u4e0a，\u7ec4\u4ef6\u626b\u63cf\u81ea\u52a8\u521b\u5efa Bean；<\/p>\n @Bean \u6253\u5728\u65b9\u6cd5\u4e0a，\u624b\u52a8\u5b9e\u4f8b\u5316\u5bf9\u8c61\u653e\u5230\u5bb9\u5668，\u9002\u5408\u5f15\u5165\u7b2c\u4e09\u65b9\u7c7b\u3002<\/p>\n IOC \u662f Spring \u7684\u6839\u57fa，AOP \u5efa\u7acb\u5728 IOC \u4e4b\u4e0a<\/p>\n \u7b80\u5355\u7406\u89e3：IOC \u8d1f\u8d23\u9020\u5bf9\u8c61，AOP \u8d1f\u8d23\u7ed9\u5bf9\u8c61\u5957\u4ee3\u7406\u589e\u5f3a\u3002<\/p><\/p>\n","protected":false},"excerpt":{"rendered":" Spring AOP \u8be6\u7ec6\u8bb2\u89e3
\n\u2502 \u251c\u2500\u2500\u2500\u2500 Pointcut\u3010\u5207\u5165\u70b9\u3011：\u5339\u914d\u89c4\u5219，\u7b5b\u9009\u54ea\u4e9bJoinPoint\u9700\u8981\u62e6\u622a \u2502
\n\u2502 \u2514\u2500\u2500\u2500\u2500 Advice\u3010\u901a\u77e5\u3011：\u5339\u914d\u540e\u8981\u6267\u884c\u7684\u589e\u5f3a\u4ee3\u7801（before\/after\u7b49） \u2502
\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n
\n \u2502 Target\u3010\u76ee\u6807\u5bf9\u8c61\u3011\u4e0a\u53ef\u88ab\u62e6\u622a\u7684\u6267\u884c\u70b9(\u65b9\u6cd5) \u2502
\n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n
\n\u4e09\u3001Spring AOP \u5e95\u5c42\u4e24\u79cd\u52a8\u6001\u4ee3\u7406\u5b9e\u73b0<\/h3>\n
1. JDK \u52a8\u6001\u4ee3\u7406<\/h4>\n
\n
2. CGLIB \u52a8\u6001\u4ee3\u7406<\/h4>\n
\n
3. \u4e24\u4e2a\u4ee3\u7406\u5bf9\u6bd4<\/h4>\n
\n
\npublic class UserService {
\n \/\/ \u666e\u901a\u65b9\u6cd5，\u53ef\u4ee5\u88ab\u5b50\u7c7b\u91cd\u5199，\u80fd\u88abAOP\u62e6\u622a
\n public void addUser() {
\n System.out.println("\u65b0\u589e\u7528\u6237，\u4e1a\u52a1\u903b\u8f91");
\n }<\/p>\n
\n public final void deleteUser() {
\n System.out.println("\u5220\u9664\u7528\u6237");
\n }
\n}<\/p>\n
\npublic class UserService$$CGLIB extends UserService {<\/p>\n
\n public void addUser() {
\n \/\/ \u3010Advice\u589e\u5f3a\u903b\u8f91\u3011\u524d\u7f6e\u901a\u77e5：\u65e5\u5fd7\/\u4e8b\u52a1
\n System.out.println("\u65b9\u6cd5\u6267\u884c\u524d：\u8bb0\u5f55\u65e5\u5fd7");<\/p>\n
\n super.addUser();<\/p>\n
\n System.out.println("\u65b9\u6cd5\u6267\u884c\u540e");
\n }<\/p>\n
\n \/\/ \u4e0d\u4f1a\u751f\u6210\u91cd\u5199\u7684deleteUser\u65b9\u6cd5
\n}<\/p>\n
\nUserService userService = context.getBean(UserService.class);
\nuserService.addUser(); \/\/ \u8d70\u4ee3\u7406，\u89e6\u53d1AOP\u589e\u5f3a \u2705
\nuserService.deleteUser(); \/\/ \u76f4\u63a5\u8c03\u7528\u7236\u7c7b\u539f\u59cb\u65b9\u6cd5，**\u4e0d\u4f1a\u89e6\u53d1AOP** \u274c <\/p>\n
\n void addUser();
\n}<\/p>\n
\npublic class UserServiceImpl implements UserService {<\/p>\n
\n public void addUser() {
\n System.out.println("\u3010\u4e1a\u52a1\u3011\u65b0\u589e\u7528\u6237");
\n }<\/p>\n
\n public void hello() {
\n System.out.println("hello，\u8fd9\u662f\u5b9e\u73b0\u7c7b\u72ec\u6709\u7684\u65b9\u6cd5");
\n }
\n}<\/p>\n
\nimport java.lang.reflect.Method;
\nimport java.lang.reflect.Proxy;<\/p>\n
\n \/\/ target：\u539f\u59cb\u76ee\u6807\u5bf9\u8c61 UserServiceImpl
\n public static UserService getProxy(UserService target) {
\n \/\/ InvocationHandler：\u56de\u8c03，\u4ee3\u7406\u65b9\u6cd5\u88ab\u8c03\u7528\u65f6\u8fdb\u5165\u8fd9\u91cc（\u5bf9\u5e94AOP\u7684Advice）
\n InvocationHandler handler = new InvocationHandler() {
\n @Override
\n public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
\n \/\/ \u524d\u7f6e\u589e\u5f3a（Advice）
\n System.out.println("\u3010JDK\u4ee3\u7406\u524d\u7f6e\u3011\u65b9\u6cd5\u6267\u884c\u524d");
\n \/\/ \u6267\u884c\u539f\u59cb\u76ee\u6807\u65b9\u6cd5
\n Object result = method.invoke(target, args);
\n \/\/ \u540e\u7f6e\u589e\u5f3a（Advice）
\n System.out.println("\u3010JDK\u4ee3\u7406\u540e\u7f6e\u3011\u65b9\u6cd5\u6267\u884c\u540e");
\n return result;
\n }
\n };<\/p>\n
\n \/\/ \u53c2\u6570：\u7c7b\u52a0\u8f7d\u5668\u3001\u3010\u63a5\u53e3\u6570\u7ec4\u3011\u3001InvocationHandler
\n return (UserService) Proxy.newProxyInstance(
\n target.getClass().getClassLoader(),
\n target.getClass().getInterfaces(), \/\/ \u2705 \u4f20\u5165\u63a5\u53e3！JDK\u4ee3\u7406\u9760\u8fd9\u4e2a\u751f\u6210\u4ee3\u7406\u7c7b
\n handler
\n );
\n }
\n}<\/p>\n
\n public static void main(String[] args) {
\n UserService target = new UserServiceImpl();
\n \/\/ \u62ff\u5230\u4ee3\u7406\u5bf9\u8c61，\u6ce8\u610f：\u4ee3\u7406\u5bf9\u8c61\u7c7b\u578b\u662f \u63a5\u53e3 UserService，\u4e0d\u662f UserServiceImpl
\n UserService proxy = JdkProxyFactory.getProxy(target);<\/p>\n
\n \/\/ proxy \u662f\u63a5\u53e3\u7c7b\u578bUserService，\u63a5\u53e3\u6ca1\u6709hello\u65b9\u6cd5，\u8c03\u7528\u4e0d\u5230\u5b9e\u73b0\u7c7b\u72ec\u6709\u7684\u65b9\u6cd5
\n }
\n}<\/p>\n\u8f93\u51fa\u7ed3\u679c<\/h4>\n
\n\u3010\u4e1a\u52a1\u3011\u65b0\u589e\u7528\u6237
\n\u3010JDK\u4ee3\u7406\u540e\u7f6e\u3011\u65b9\u6cd5\u6267\u884c\u540e<\/p>\n
\npublic class $Proxy0 implements UserService {
\n private InvocationHandler h;<\/p>\n
\n this.h = h;
\n }<\/p>\n
\n public void addUser() {
\n \/\/ \u8c03\u7528\u6211\u4eec\u5199\u7684invoke，\u6267\u884c\u589e\u5f3a\u903b\u8f91
\n h.invoke(this, addUserMethod, null);
\n }<\/p>\n\n
\u56db\u3001AOP\u5207\u70b9\u8868\u8fbe\u5f0f execution（\u6700\u5e38\u7528）<\/h3>\n
\n
\nexecution(public * com.service.*.*(..))<\/p>\n
\nexecution(* com.service..*.*(..))<\/p>\n
\nexecution(* com.service.UserService.*(..))<\/p>\n
\nexecution(* com.service..*.save*(..))<\/p>\n\n
\n\u4e94\u3001AOP\u901a\u77e5\u6267\u884c\u987a\u5e8f<\/h3>\n
\u6b63\u5e38\u6267\u884c（\u65e0\u5f02\u5e38）<\/h4>\n
\u629b\u51fa\u5f02\u5e38<\/h4>\n
\u516d\u3001\u7b80\u5355\u5b8c\u6574\u4ee3\u7801\u793a\u4f8b<\/h3>\n
\n<dependency>
\n <groupId>org.springframework.boot<\/groupId>
\n <artifactId>spring-boot-starter-aop<\/artifactId>
\n<\/dependency><\/p>\n2. \u4e1a\u52a1\u7c7b（\u76ee\u6807\u7c7b）<\/h4>\n
\npublic class UserService {
\n public void addUser(String name){
\n System.out.println("\u4e1a\u52a1：\u65b0\u589e\u7528\u6237 " + name);
\n }
\n}<\/p>\n3. \u5207\u9762\u7c7b（@Aspect + @Component）<\/h4>\n
\n@Component
\npublic class LogAspect {<\/p>\n
\n @Pointcut("execution(* com.service.UserService.*(..))")
\n public void pointCut(){}<\/p>\n
\n @Before("pointCut()")
\n public void before(JoinPoint joinPoint){
\n String methodName = joinPoint.getSignature().getName();
\n Object[] args = joinPoint.getArgs();
\n System.out.println("\u3010\u524d\u7f6e\u901a\u77e5\u3011\u65b9\u6cd5："+methodName + " \u53c2\u6570："+ Arrays.toString(args));
\n }<\/p>\n
\n @AfterReturning(value = "pointCut()", returning = "result")
\n public void afterReturn(Object result){
\n System.out.println("\u3010\u8fd4\u56de\u901a\u77e5\u3011\u65b9\u6cd5\u6b63\u5e38\u6267\u884c，\u8fd4\u56de\u503c："+result);
\n }<\/p>\n
\n @AfterThrowing(value = "pointCut()", throwing = "ex")
\n public void afterThrow(Exception ex){
\n System.out.println("\u3010\u5f02\u5e38\u901a\u77e5\u3011\u6355\u83b7\u5f02\u5e38："+ex.getMessage());
\n }<\/p>\n
\n @After("pointCut()")
\n public void after(){
\n System.out.println("\u3010\u6700\u7ec8\u901a\u77e5\u3011\u65e0\u8bba\u662f\u5426\u5f02\u5e38\u90fd\u4f1a\u6267\u884c");
\n }<\/p>\n
\n @Around("pointCut()")
\n public Object around(ProceedingJoinPoint pjp) throws Throwable {
\n System.out.println("\u3010\u73af\u7ed5\u901a\u77e5\u3011\u65b9\u6cd5\u6267\u884c\u524d");
\n \/\/ \u6267\u884c\u76ee\u6807\u65b9\u6cd5
\n Object res = pjp.proceed();
\n System.out.println("\u3010\u73af\u7ed5\u901a\u77e5\u3011\u65b9\u6cd5\u6267\u884c\u540e");
\n return res;
\n }
\n}<\/p>\n
\n\u3010\u524d\u7f6e\u901a\u77e5\u3011\u65b9\u6cd5：addUser \u53c2\u6570：[\u5f20\u4e09]
\n \u4e1a\u52a1：\u65b0\u589e\u7528\u6237 \u5f20\u4e09
\n\u3010\u8fd4\u56de\u901a\u77e5\u3011\u65b9\u6cd5\u6b63\u5e38\u6267\u884c，\u8fd4\u56de\u503c：null
\n\u3010\u6700\u7ec8\u901a\u77e5\u3011\u65e0\u8bba\u662f\u5426\u5f02\u5e38\u90fd\u4f1a\u6267\u884c
\n\u3010\u73af\u7ed5\u901a\u77e5\u3011\u65b9\u6cd5\u6267\u884c\u540e<\/p>\n\u4e03\u3001\u5b8c\u6574 AOP \u5b9e\u6218\u6848\u4f8b：\u63a5\u53e3\u64cd\u4f5c\u65e5\u5fd7\u5207\u9762<\/h3>\n
\u6b65\u9aa4 1：\u81ea\u5b9a\u4e49\u6ce8\u89e3<\/h4>\n
\n * \u6807\u8bb0\u8be5\u65b9\u6cd5\u9700\u8981\u8bb0\u5f55\u64cd\u4f5c\u65e5\u5fd7
\n *\/
\n@Target(ElementType.METHOD)
\n@Retention(RetentionPolicy.RUNTIME)
\npublic @interface OperateLog {
\n \/\/ \u64cd\u4f5c\u63cf\u8ff0：\u65b0\u589e\u7528\u6237\u3001\u4fee\u6539\u8ba2\u5355\u7b49
\n String value();
\n}<\/p>\n\u6b65\u9aa4 2：\u5b9e\u4f53\u7c7b<\/h4>\n
\npublic class OperateLogDTO {
\n private String username; \/\/ \u5f53\u524d\u64cd\u4f5c\u4eba
\n private String operateDesc; \/\/ \u64cd\u4f5c\u63cf\u8ff0
\n private String params; \/\/ \u8bf7\u6c42\u53c2\u6570
\n private String result; \/\/ \u8fd4\u56de\u7ed3\u679c
\n private Long costTime; \/\/ \u8017\u65f6ms
\n private boolean success; \/\/ \u662f\u5426\u6210\u529f
\n private String errorMsg; \/\/ \u5f02\u5e38\u4fe1\u606f
\n}<\/p>\n\u6b65\u9aa4 3：\u5207\u9762\u7c7b<\/h4>\n
\nimport org.aspectj.lang.ProceedingJoinPoint;
\nimport org.aspectj.lang.annotation.*;
\nimport org.springframework.stereotype.Component;
\nimport com.alibaba.fastjson2.JSON;<\/p>\n
\n@Component
\npublic class OperateLogAspect {<\/p>\n
\n \/\/ \u5207\u70b9\u89c4\u5219：\u62e6\u622a\u3010\u52a0\u4e86@OperateLog\u6ce8\u89e3\u3011\u7684\u65b9\u6cd5
\n @Pointcut("@annotation(operateLog)")
\n public void logPointcut(OperateLog operateLog) {
\n }<\/p>\n
\n @Around("logPointcut(operateLog)")
\n public Object around(ProceedingJoinPoint joinPoint, OperateLog operateLog) throws Throwable {
\n OperateLogDTO logDto = new OperateLogDTO();
\n long start = System.currentTimeMillis();
\n logDto.setOperateDesc(operateLog.value());
\n logDto.setUsername("admin"); \/\/ \u6a21\u62df\u4ece\u4e0a\u4e0b\u6587\u83b7\u53d6\u767b\u5f55\u7528\u6237
\n logDto.setParams(JSON.toJSONString(joinPoint.getArgs()));<\/p>\n
\n try {
\n \/\/ proceed()：\u6267\u884c\u76ee\u6807\u65b9\u6cd5，\u4e2d\u95f4\u4f1a\u89e6\u53d1@Before
\n result = joinPoint.proceed();
\n logDto.setSuccess(true);
\n logDto.setResult(JSON.toJSONString(result));
\n } catch (Throwable e) {
\n logDto.setSuccess(false);
\n logDto.setErrorMsg(e.getMessage());
\n throw e; \/\/ \u7ee7\u7eed\u5411\u4e0a\u629b\u5f02\u5e38，\u4ea4\u7ed9\u5168\u5c40\u5f02\u5e38\u5904\u7406\u5668
\n } finally {
\n long cost = System.currentTimeMillis() – start;
\n logDto.setCostTime(cost);
\n \/\/ \u6a21\u62df\u4fdd\u5b58\u65e5\u5fd7\u5230\u6570\u636e\u5e93
\n saveLog(logDto);
\n }
\n return result;
\n }<\/p>\n
\n @Before("logPointcut(operateLog)")
\n public void before(JoinPoint joinPoint, OperateLog operateLog) {
\n System.out.println("==== @Before \u6267\u884c：\u51c6\u5907\u6267\u884c\u3010" + operateLog.value() + "\u3011\u64cd\u4f5c ====");
\n }<\/p>\n
\n @AfterReturning(value = "logPointcut(operateLog)", returning = "ret")
\n public void afterReturning(JoinPoint joinPoint, OperateLog operateLog, Object ret) {
\n System.out.println("==== @AfterReturning \u6267\u884c：\u64cd\u4f5c\u3010"+operateLog.value()+"\u3011\u6210\u529f，\u8fd4\u56de\u503c：" + ret);
\n }<\/p>\n
\n @AfterThrowing(value = "logPointcut(operateLog)", throwing = "ex")
\n public void afterThrowing(JoinPoint joinPoint, OperateLog operateLog, Throwable ex) {
\n System.out.println("==== @AfterThrowing \u6267\u884c：\u64cd\u4f5c\u3010"+operateLog.value()+"\u3011\u53d1\u751f\u5f02\u5e38：" + ex.getMessage());
\n }<\/p>\n
\n @After("logPointcut(operateLog)")
\n public void after(JoinPoint joinPoint, OperateLog operateLog) {
\n System.out.println("==== @After \u6267\u884c：\u64cd\u4f5c\u3010"+operateLog.value()+"\u3011\u6d41\u7a0b\u7ed3\u675f（finally） ====");
\n }<\/p>\n
\n private void saveLog(OperateLogDTO dto) {
\n System.out.println("\u3010\u4fdd\u5b58\u64cd\u4f5c\u65e5\u5fd7\u5230DB\u3011" + JSON.toJSONString(dto));
\n }
\n}<\/p>\n\u6b65\u9aa4 4：\u76ee\u6807\u4e1a\u52a1 Controller（\u76ee\u6807 Target）<\/h4>\n
\n@RequestMapping("\/user")
\npublic class UserController {<\/p>\n
\n @OperateLog(value = "\u65b0\u589e\u7528\u6237")
\n @PostMapping("\/add")
\n public String addUser(String username, Integer age){
\n System.out.println("===== \u76ee\u6807\u65b9\u6cd5：\u65b0\u589e\u7528\u6237\u4e1a\u52a1\u903b\u8f91\u6267\u884c =====");
\n \/\/ \u6a21\u62df\u4e1a\u52a1
\n return "\u7528\u6237\u65b0\u589e\u6210\u529f, name:" + username;
\n }<\/p>\n
\n @OperateLog(value = "\u5220\u9664\u7528\u6237")
\n @PostMapping("\/delete")
\n public String deleteUser(){
\n System.out.println("===== \u76ee\u6807\u65b9\u6cd5：\u5220\u9664\u7528\u6237\u4e1a\u52a1，\u629b\u51fa\u5f02\u5e38 =====");
\n throw new RuntimeException("\u7528\u6237\u4e0d\u5b58\u5728，\u5220\u9664\u5931\u8d25");
\n }
\n}<\/p>\n
\n\u573a\u666f 1：\u8c03\u7528 \/user\/add \u3010\u6b63\u5e38\u65e0\u5f02\u5e38\u3011<\/h4>\n
\n\u3010\u4fdd\u5b58\u64cd\u4f5c\u65e5\u5fd7\u5230DB\u3011{"username":"admin","operateDesc":"\u65b0\u589e\u7528\u6237","params":
\n["zhangsan",20],"result":"\u7528\u6237\u65b0\u589e\u6210\u529f, name:zhangsan","costTime":5,"success":true,"errorMsg":null}<\/p>\n
\n\u3010\u4fdd\u5b58\u64cd\u4f5c\u65e5\u5fd7\u5230DB\u3011{"username":"admin","operateDesc":"\u5220\u9664\u7528\u6237","params":[],"result":null,"costTime":2,"success":false,"errorMsg":"\u7528\u6237\u4e0d\u5b58\u5728，\u5220\u9664\u5931\u8d25"}<\/p>\n
\n\n
AOP \u540d\u8bcd\u5728\u672c\u6848\u4f8b\u5bf9\u5e94\u7684\u4e1c\u897f<\/tr>\n \n\n Target \u76ee\u6807\u5bf9\u8c61<\/td>\n UserController<\/td>\n<\/tr>\n \n JoinPoint \u8fde\u63a5\u70b9<\/td>\n addUser ()\u3001deleteUser () \u8fd9\u4e24\u4e2a\u65b9\u6cd5（\u53ef\u88ab\u589e\u5f3a\u7684\u70b9\u4f4d）<\/td>\n<\/tr>\n \n Pointcut \u5207\u70b9<\/td>\n @annotation(OperateLog) \u5339\u914d\u89c4\u5219，\u7b5b\u9009\u54ea\u4e9b\u8fde\u63a5\u70b9\u8981\u62e6\u622a<\/td>\n<\/tr>\n \n Advice \u901a\u77e5<\/td>\n @Before \/ @Around \/ @AfterReturning \/ @AfterThrowing \/ @After \u8fd9 5 \u6bb5\u589e\u5f3a\u4ee3\u7801<\/td>\n<\/tr>\n \n Aspect \u5207\u9762<\/td>\n OperateLogAspect \u6574\u4e2a\u7c7b（\u5207\u70b9 + \u6240\u6709\u901a\u77e5\u7ec4\u5408\u5728\u4e00\u8d77）<\/td>\n<\/tr>\n \n Weaving \u7ec7\u5165<\/td>\n Spring \u542f\u52a8\u540e，\u8fd0\u884c\u671f\u521b\u5efa UserController \u7684\u4ee3\u7406\u5bf9\u8c61，\u628a\u5207\u9762\u903b\u8f91\u5d4c\u5165\u5230\u76ee\u6807\u65b9\u6cd5\u7684\u8fc7\u7a0b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u6982\u62ec<\/h4>\n
\n\u516b\u3001Spring AOP \u5e38\u89c1\u5751<\/h3>\n
\u5751 1：\u540c\u7c7b\u65b9\u6cd5\u81ea\u8c03\u7528，AOP \u5931\u6548<\/h4>\n
\npublic class UserService{
\n public void test(){
\n \/\/ this\u662f\u539f\u59cb\u5bf9\u8c61，\u4e0d\u662f\u4ee3\u7406\u5bf9\u8c61！\u5207\u9762\u4e0d\u4f1a\u89e6\u53d1
\n this.addUser("test");
\n }
\n public void addUser(String name){}
\n}<\/p>\n\u5751 2：private \u65b9\u6cd5\u4e0d\u80fd\u88ab AOP \u589e\u5f3a<\/h4>\n
\u5751 3：final \u7c7b \/final \u65b9\u6cd5\u65e0\u6cd5\u88ab CGLIB \u4ee3\u7406<\/h4>\n
\u5751 4：\u4e8b\u52a1\u6ce8\u89e3 @Transactional \u653e\u5728\u975e public \u65b9\u6cd5\u5931\u6548<\/h4>\n
\u5751 5：\u591a\u4e2a\u5207\u9762\u987a\u5e8f\u6df7\u6dc6<\/h4>\n
\nSpring IOC \u8be6\u7ec6\u8bb2\u89e3<\/h2>\n
\u4e00\u3001IOC \u662f\u4ec0\u4e48<\/h3>\n
\npublic class PayService {
\n public boolean pay(Long orderId, BigDecimal money){
\n System.out.println("\u53d1\u8d77\u652f\u4ed8");
\n return true;
\n }
\n}<\/p>\n
\npublic class OrderService {
\n private final PayService payService;<\/p>\n
\n \/\/ \u3010\u91cd\u70b9\u3011\u5bb9\u5668\u521b\u5efaOrderService Bean\u7684\u65f6\u5019，\u4f1a\u8c03\u7528\u8fd9\u4e2a\u6784\u9020\u65b9\u6cd5
\n \/\/ \u5bb9\u5668\u4ece\u5bb9\u5668\u5185\u90e8\u627e\u5230PayService Bean，\u81ea\u52a8\u4f20\u8fdb\u6765
\n public OrderService(PayService payService) {
\n this.payService = payService;
\n }<\/p>\n
\n System.out.println("\u521b\u5efa\u8ba2\u5355");
\n payService.pay(orderId, money);
\n }
\n}<\/p>\n
\npublic class IoCDemoApplication {
\n public static void main(String[] args) {
\n ApplicationContext ctx = SpringApplication.run(IoCDemoApplication.class, args);
\n \/\/ \u76f4\u63a5\u4ece\u5bb9\u5668\u62ffOrderService，\u4f9d\u8d56\u5df2\u7ecf\u6ce8\u5165\u5b8c\u6210
\n OrderService orderService = ctx.getBean(OrderService.class);
\n orderService.createOrder(1L, new BigDecimal("99"));
\n }
\n}<\/p>\n
\n\u53d1\u8d77\u652f\u4ed8<\/p>\n\u4e8c\u3001\u4e3a\u4ec0\u4e48\u8981\u7528 IOC（\u89e3\u51b3\u4ec0\u4e48\u95ee\u9898）<\/h3>\n
\n \/\/ \u786c\u7f16\u7801new，\u8026\u5408\u4e25\u91cd，\u66ff\u6362\u5b9e\u73b0\u8981\u6539\u4ee3\u7801
\n private UserService userService = new UserServiceImpl();
\n}<\/p>\n
\n \/\/ \u5bb9\u5668\u81ea\u52a8\u6ce8\u5165，\u4e0d\u9700\u8981new
\n @Autowired
\n private UserService userService;
\n}<\/p>\n\u4e09\u3001IOC \u5bb9\u5668\u6838\u5fc3\u7ec4\u4ef6<\/h3>\n
\n
\n
\n
\n
\u56db\u3001Bean：IOC \u5bb9\u5668\u7ba1\u7406\u7684\u5bf9\u8c61<\/h3>\n
Bean \u7684\u4f5c\u7528\u57df scope<\/h4>\n
\n
\u4e94\u3001\u4f9d\u8d56\u6ce8\u5165 DI \u7684 3 \u79cd\u65b9\u5f0f<\/h3>\n
1. \u6784\u9020\u5668\u6ce8\u5165（Spring \u5b98\u65b9\u63a8\u8350）<\/h4>\n
\npublic class UserController {
\n private final UserService userService;<\/p>\n
\n public UserController(UserService userService) {
\n this.userService = userService;
\n }
\n}<\/p>\n\n
2. Setter \u65b9\u6cd5\u6ce8\u5165<\/h4>\n
\npublic class UserController {
\n private UserService userService;<\/p>\n
\n public void setUserService(UserService userService) {
\n this.userService = userService;
\n }
\n}<\/p>\n3. \u5b57\u6bb5\u6ce8\u5165（@Autowired \u76f4\u63a5\u6253\u5728\u5c5e\u6027\u4e0a）<\/h4>\n
\npublic class UserController {
\n @Autowired
\n private UserService userService;
\n}<\/p>\n\n
\u6ce8\u5165\u6ce8\u89e3：@Autowired\u3001@Resource\u533a\u522b<\/h4>\n
\u516d\u3001Bean \u5b8c\u6574\u751f\u547d\u5468\u671f<\/h3>\n
\n
\n
\u4e03\u3001\u5faa\u73af\u4f9d\u8d56（IOC \u7ecf\u5178\u96be\u70b9）<\/h3>\n
\u4ec0\u4e48\u662f\u5faa\u73af\u4f9d\u8d56<\/h4>\n
\npublic class A {
\n @Autowired
\n private B b;
\n}
\n@Component
\npublic class B {
\n @Autowired
\n private A a;
\n}<\/p>\nSpring \u80fd\u89e3\u51b3\u54ea\u79cd\u5faa\u73af\u4f9d\u8d56？<\/h4>\n
\u4e09\u7ea7\u7f13\u5b58\u539f\u7406（\u9762\u8bd5\u5fc5\u95ee）<\/h4>\n
\n
\u516b\u3001Bean \u7684\u914d\u7f6e\u65b9\u5f0f<\/h3>\n
\npublic class MyConfig {
\n @Bean
\n public UserService userService(){
\n return new UserServiceImpl();
\n }
\n}<\/p>\n\u4e5d\u3001IOC \u5bb9\u5668\u542f\u52a8\u5927\u81f4\u6d41\u7a0b（ApplicationContext）<\/h3>\n
\u5341\u3001IOC \u9ad8\u9891\u9762\u8bd5\u9898\u6c47\u603b<\/h3>\n
\nIOC \u548c AOP \u7684\u5173\u7cfb\u603b\u7ed3<\/h2>\n
\n\u4e00\u3001AOP \u662f\u4ec0\u4e48
\nAOP：Aspect Oriented Programming，\u9762\u5411\u5207\u9762\u7f16\u7a0b\u3002 AOP \u7684\u6838\u5fc3\u539f\u7406\u5c31\u662f\u52a8\u6001\u751f\u6210\u4ee3\u7406\u5bf9\u8c61，\u5728\u4e0d\u6539\u52a8\u539f\u4e1a\u52a1\u4ee3\u7801\u7684\u60c5\u51b5\u4e0b，\u901a\u8fc7\u4ee3\u7406\u53bb\u62e6\u622a\u76ee\u6807\u65b9\u6cd5，\u5728\u65b9\u6cd5\u524d\u540e\u63d2\u5165\u5207\u9762\u903b\u8f91\u3002 \u6838\u5fc3\u601d\u60f3：\u4e1a\u52a1\u4ee3\u7801\u53ea\u5173\u5fc3\u4e1a\u52a1，\u516c\u5171\u903b\u8f91\u4ea4\u7ed9\u5207\u9762\u3002 \u5178\u578b\u901a\u7528\u573a\u666f： \u65e5\u5fd7\u8bb0\u5f55\u3001\u6027\u80fd\u7edf\u8ba1\u3001\u6743\u9650\u6821\u9a8c\u3001\u4e8b\u52a1\u63a7\u5236\u3001\u5f02\u5e38\u5904\u7406<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[11820,12899,4887,5220,99,101],"topic":[],"class_list":["post-113358","post","type-post","status-publish","format-standard","hentry","category-server","tag-atomgit","tag-12899","tag-aop","tag-ioc","tag-java","tag-spring"],"yoast_head":"\n