{"id":97522,"date":"2026-08-29T18:56:57","date_gmt":"2026-08-29T10:56:57","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/97522.html"},"modified":"2026-08-29T18:56:57","modified_gmt":"2026-08-29T10:56:57","slug":"javaee%e5%88%9d%e9%98%b6-%e5%a4%9a%e7%ba%bf%e7%a8%8b%ef%bc%9a%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f-%e9%98%bb%e5%a1%9e%e9%98%9f%e5%88%97","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/97522.html","title":{"rendered":"JavaEE\u521d\u9636 \u591a\u7ebf\u7a0b\uff1a\u5355\u4f8b\u6a21\u5f0f | \u963b\u585e\u961f\u5217"},"content":{"rendered":"

\u76ee\u5f55<\/p>\n

\n

Singleton \u5355\u4f8b\u6a21\u5f0f<\/p>\n

\u997f\u6c49\u6a21\u5f0f，\u8fd0\u884c\u5373\u521b\u5efa<\/p>\n

\u61d2\u6c49\u6a21\u5f0f，\u9700\u8981\u65f6\u518d\u521b\u5efa<\/p>\n

\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898<\/p>\n

\u963b\u585e\u961f\u5217<\/p>\n

\u963b\u585e\u961f\u5217\u5b9e\u73b0<\/p>\n

\u963b\u585e\u961f\u5217\u7684\u4f7f\u7528<\/p>\n

\u963b\u585e\u961f\u5217\u4f5c\u7528<\/p>\n

\n

Singleton \u5355\u4f8b\u6a21\u5f0f<\/h3>\n

\u5355\u4f8b\u6a21\u5f0f\u80fd\u4fdd\u8bc1\u67d0\u4e2a\u7c7b\u5728\u7a0b\u5e8f\u4e2d\u53ea\u5b58\u5728\u552f\u2f00\u2f00\u4efd\u5b9e\u4f8b<\/span>,\u2f7d\u4e0d\u4f1a\u521b\u5efa\u51fa\u591a\u4e2a\u5b9e\u4f8b\u3002<\/p>\n

\u5355\u4f8b\u6a21\u5f0f\u6700\u5e38\u2ec5\u7684\u5b9e\u73b0\u2f45\u7684\u662f"\u997f\u6c49"\u548c"\u61d2\u6c49"\u4e24\u79cd<\/p>\n

\u997f\u6c49\u6a21\u5f0f，\u8fd0\u884c\u5373\u521b\u5efa<\/h4>\n

class Singleton{
\n private static Singleton instance=new Singleton();
\n private static Singleton getinstance(){
\n return instance;
\n }
\n \/\/\u6784\u9020\u65b9\u6cd5\u79c1\u6709\u5316，\u4ec5\u9650\u5728Singleton\u7c7b\u4e2d\u5b9e\u4f8b\u5316，\u786e\u4fdd\u5355\u4f8b\u5316
\n private Singleton(){
\n }
\n} <\/p>\n

\u61d2\u6c49\u6a21\u5f0f，\u9700\u8981\u65f6\u518d\u521b\u5efa<\/h4>\n

class Singleton{
\n private static Object locker=new Object();
\n\/\/volatile\u4fee\u9970instance
\n private static volatile Singleton instance=null;
\n public static Singleton getinstance(){
\nif (instance==null){
\n synchronized (locker){
\n if (instance==null){
\n instance=new Singleton();
\n }
\n }
\n}
\n \/\/\u5b9e\u4f8b\u5316\u65f6\u539f\u5b50\u64cd\u4f5c
\n return instance;
\n }
\n \/\/\u6784\u9020\u65b9\u6cd5\u79c1\u6709\u5316，\u4ec5\u9650\u5728Singleton\u7c7b\u4e2d\u5b9e\u4f8b\u5316，\u786e\u4fdd\u5355\u4f8b\u5316
\n private Singleton(){
\n }
\n} <\/p>\n

\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898<\/h4>\n

\u997f\u6c49\u6a21\u5f0f\u4e0d\u5b58\u5728\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898，\u61d2\u6c49\u6a21\u5f0f\u5f53\u591a\u4e2a\u7ebf\u7a0b\u8c03\u7528getInstance\u2f45\u6cd5,\u5c31\u53ef\u80fd\u5bfc\u81f4\u521b\u5efa \u51fa\u591a\u4e2a\u5b9e\u4f8b，\u540e\u9762\u7684\u5b9e\u4f8b\u4f1a\u8986\u76d6\u524d\u9762\u5b9e\u4f8b<\/span>，\u8d44\u6e90\u6d6a\u8d39\u3002<\/p>\n

\"\"<\/p>\n

\u2f00\u65e6\u5b9e\u4f8b\u5df2\u7ecf\u521b\u5efa\u597d\u4e86,\u540e\u2faf\u518d\u591a\u7ebf\u7a0b\u73af\u5883\u8c03\u2f64getInstance\u5c31\u4e0d\u518d\u6709\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u4e86(\u4e0d\u518d\u4fee\u6539 instance \u4e86）<\/p>\n

\u4f7f\u7528\u9501\u4fdd\u8bc1\u539f\u5b50\u6027<\/p>\n

\/\/\u5224\u65ad\u662f\u5426\u9700\u8981\u52a0\u9501，\u5df2\u7ecf\u521b\u5efa\u5b9e\u4f8b\u540e\u51cf\u5c11\u8d44\u6e90\u6d6a\u8d39
\nif (instance==null){
\n synchronized (locker){
\n\/\/\u5224\u65ad\u662f\u5426\u9700\u8981\u5b9e\u4f8b\u5316
\n if (instance==null){
\n instance=new Singleton();
\n }
\n }
\n} <\/p>\n

\u901a\u8fc7volatile\u5173\u952e\u5b57\u4fee\u9970<\/p>\n

\u4f46\u7ebf\u7a0b\u5728\u52a0\u9501\u64cd\u4f5c\u65f6\u4ecd\u4f1a\u88ab\u8c03\u5ea6，\u5bfc\u81f4t1\u7ebf\u7a0b\u4e2dinstance\u4f7f\u7528\u4e86\u672a\u521d\u59cb\u5316\u7684\u5b9e\u4f8b<\/span>，\u56e0\u6b64\u9700\u8981\u52a0\u5165volatile\u907f\u514d\u91cd\u6392\u5e8f<\/p>\n

\"\"<\/p>\n

\u5bf9\u6570\u636e\u5e93\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f<\/p>\n

class DBUtil {
\n private static volatile DataSource dataSource = null;<\/p>\n

public static DataSource getInstance() {
\n if (dataSource == null) {
\n synchronized (DBUtil.class) {
\n if (dataSource == null) {
\n MysqlDataSource ds = new MysqlDataSource();
\n ds.setUrl("jdbc:mysql:\/\/127.0.0.1:3306\/java117?characterEncoding=utf8&useSSL=false");
\n ds.setUser("root");
\n ds.setPassword("2222");
\n dataSource = ds;
\n }
\n }
\n }
\n return dataSource;
\n }
\n private DBUtil{}
\n} <\/p>\n

\u963b\u585e\u961f\u5217<\/h3>\n

\u963b\u585e\u961f\u5217\u662f\u2f00\u79cd\u7279\u6b8a\u7684\u961f\u5217.\u4e5f\u9075\u5b88"\u5148\u8fdb\u5148\u51fa"\u7684\u539f\u5219，\u5177\u6709\u7ebf\u7a0b\u5b89\u5168<\/span>\u7684\u963b\u585e\u961f\u5217<\/span><\/p>\n

1.\u5f53\u961f\u5217\u6ee1\u7684\u65f6\u5019,\u7ee7\u7eed\u2f0a\u961f\u5217\u5c31\u4f1a\u963b\u585e,\u76f4\u5230\u6709\u5176\u4ed6\u7ebf\u7a0b\u4ece\u961f\u5217\u4e2d\u53d6\u2f9b\u5143\u7d20.<\/p>\n

\u00a02.\u5f53\u961f\u5217\u7a7a\u7684\u65f6\u5019,\u7ee7\u7eed\u51fa\u961f\u5217\u4e5f\u4f1a\u963b\u585e,\u76f4\u5230\u6709\u5176\u4ed6\u7ebf\u7a0b\u5f80\u961f\u5217\u4e2d\u63d2\u2f0a\u5143\u7d20.<\/p>\n

\u963b\u585e\u961f\u5217\u5b9e\u73b0<\/h4>\n

class Queue{
\nprivate int[] Arrayqueue;
\nint tail=0;
\nint head=0;
\nint size=0;
\npublic Queue(int capacity){
\n Arrayqueue=new int[capacity];
\n}
\nObject locker=new Object();
\npublic void put(int n) throws InterruptedException {
\n \/\/\u5224\u6ee1\u8fd4\u56de
\n \/\/\u7ebf\u7a0b\u5b89\u5168
\n synchronized (locker){
\n \/*if(size==Arrayqueue.length){
\n \/\/\u963b\u585e\u7b49\u5f85
\n locker.wait();
\n }*\/ \/\/wait\u88ab\u5524\u9192\u65f6\u4f1a\u91cd\u65b0\u68c0\u64e6size\u662f\u5426\u7b26\u5408\u8981\u6c42
\n while (size==Arrayqueue.length){
\n locker.wait();
\n }
\n Arrayqueue[head]=n;
\n head=(head+1)%Arrayqueue.length;
\n size++;
\n locker.notifyAll();
\n }
\n}
\npublic int take() throws InterruptedException {
\n synchronized (locker){
\n \/*if (size==0){
\n locker.wait();
\n }*\/
\n while (size==0){
\n locker.wait();
\n }
\n int n= Arrayqueue[tail];
\n tail=(tail+1)% Arrayqueue.length;
\n size–;
\n locker.notifyAll();
\n return n;
\n }
\n}
\n } <\/p>\n

\u963b\u585e\u7684\u961f\u5217\u7684\u5e94\u7528\u573a\u666f：\u751f\u4ea7\u6d88\u8d39\u8005\u6a21\u578b<\/p>\n

\u751f\u4ea7\u8005\u7ebf\u7a0b\u7528\u6765\u751f\u4ea7，\u4ea7\u51fa\u653e\u5165\u963b\u585e\u961f\u5217，\u6d88\u8d39\u8005\u7ebf\u7a0b\u4ece\u963b\u585e\u961f\u5217\u53d6\u51fa\u4ea7\u54c1\u6d88\u8d39<\/p>\n

\u963b\u585e\u961f\u5217\u7684\u4f7f\u7528<\/h4>\n

\u5728Java\u6807\u51c6\u5e93\u4e2d\u5185\u7f6e\u4e86\u963b\u585e\u961f\u5217.\u5982\u679c\u6211\u4eec\u9700\u8981\u5728\u2f00\u4e9b\u7a0b\u5e8f\u4e2d\u4f7f\u2f64\u963b\u585e\u961f\u5217,\u76f4\u63a5\u4f7f\u2f64\u6807\u51c6\u5e93\u4e2d\u7684\u5373 \u53ef.<\/p>\n

1.BlockingQueue\u662f\u2f00\u4e2a\u63a5\u2f1d.\u771f\u6b63\u5b9e\u73b0\u7c7b\u5305\u62ecLinkedBlockingQueue\/ArrayBlockingQueue\/PriorityBlockingQueue.<\/p>\n

2.put\u2f45\u6cd5\u2f64\u4e8e\u963b\u585e\u5f0f\u7684\u2f0a\u961f\u5217,take\u2f64\u4e8e\u963b\u585e\u5f0f\u7684\u51fa\u961f\u5217.<\/p>\n

3.BlockingQueue\u4e5f\u6709offer,poll,peek\u7b49\u2f45\u6cd5,\u4f46\u662f\u8fd9\u4e9b\u2f45\u6cd5\u4e0d\u5e26\u6709\u963b\u585e\u7279\u6027<\/p>\n

public static void main(String[] args) {
\n \/\/ BlockingDeque<Integer> queue=new LinkedBlockingDeque<>();
\n \/\/ BlockingQueue<Integer> queue=new ArrayBlockingQueue<>(100);
\n \/\/BlockingDeque<Integer> queue= new PriorityBlockingQueue<Integer>();
\n Queue queue=new Queue(100);
\nThread t0=new Thread(()->{
\n int n=0;
\n while (true){
\n try {
\n queue.put(n);
\n System.out.println("\u751f\u4ea7\u4e86: " + n);
\n n++;
\n } catch (InterruptedException e) {
\n throw new RuntimeException(e);
\n }
\n try {
\n Thread.sleep(1000);
\n } catch (InterruptedException e) {
\n throw new RuntimeException(e);
\n }<\/p>\n

}
\n});
\nThread t1=new Thread(()->{
\n \/\/int n=0;
\n while (true){
\n \/\/int n= 0;
\n try {
\n int n = queue.take();
\n System.out.println("\u6d88\u8d39\u4e86: " + n);
\n } catch (InterruptedException e) {
\n throw new RuntimeException(e);
\n }<\/p>\n

}
\n});
\nt0.start();
\nt1.start();
\n }<\/p>\n

\u963b\u585e\u961f\u5217\u4f5c\u7528<\/h4>\n

1.\u51cf\u5c11\u8d44\u6e90\u7ade\u4e89,\u751f\u4ea7\u6d88\u8d39\u8005\u5404\u53f8\u5176\u804c<\/p>\n

2.\u89e3\u8026\u5408<\/p>\n

\u6d4f\u89c8\u5668\u4e0b\u5355\u901a\u8fc7\u7f51\u5173\u4f20\u9012\u670d\u52a1\u5668a，\u518d\u901a\u8fc7\u670d\u52a1\u5668b\u5904\u7406\u8fd4\u56de，\u5982\u679cb\u51fa\u73b0\u95ee\u9898\u76f4\u63a5\u5f71\u54cda\u5904\u7406<\/p>\n

\"\"<\/p>\n<\/p>\n

\u901a\u8fc7\u963b\u585e\u961f\u5217 a\u4e0e\u961f\u5217\u8026\u5408，b\u4e0e\u961f\u5217\u8026\u5408<\/p>\n

\"\"<\/p>\n

3.\u524a\u5cf0\u586b\u8c37<\/p>\n

\"\"<\/p>\n

\u5f53\u67d0\u4e2a\u65f6\u95f4\u6bb5\u8bbf\u95ee\u91cf\u6fc0\u589e，\u963b\u585e\u961f\u5217\u4f1a\u5148\u63a5\u53d7\u8bbf\u95ee\u91cf，\u7b49\u5f85\u670d\u52a1\u5668\u5904\u7406，\u51cf\u7f13\u670d\u52a1\u5668\u538b\u529b<\/p>\n","protected":false},"excerpt":{"rendered":"

\u76ee\u5f55 Singleton \u5355\u4f8b\u6a21\u5f0f
\n\u997f\u6c49\u6a21\u5f0f，\u8fd0\u884c\u5373\u521b\u5efa
\n\u61d2\u6c49\u6a21\u5f0f，\u9700\u8981\u65f6\u518d\u521b\u5efa
\n\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898
\n\u963b\u585e\u961f\u5217
\n\u963b\u585e\u961f\u5217\u5b9e\u73b0
\n\u963b\u585e\u961f\u5217\u7684\u4f7f\u7528
\n\u963b\u585e\u961f\u5217\u4f5c\u7528 Singleton \u5355\u4f8b\u6a21\u5f0f
\n\u5355\u4f8b\u6a21\u5f0f\u80fd\u4fdd\u8bc1\u67d0\u4e2a\u7c7b\u5728\u7a0b\u5e8f\u4e2d\u53ea\u5b58\u5728\u552f\u2f00\u2f00\u4efd\u5b9e\u4f8b,\u2f7d\u4e0d\u4f1a\u521b\u5efa\u51fa\u591a\u4e2a\u5b9e\u4f8b\u3002
\n\u5355\u4f8b\u6a21\u5f0f\u6700\u5e38\u2ec5\u7684\u5b9e\u73b0\u2f45\u7684\u662f\\”\u997f\u6c49\\”\u548c\\”\u61d2\u6c49\\”\u4e24\u79cd
\n\u997f\u6c49\u6a21\u5f0f，\u8fd0\u884c\u5373\u521b\u5efa
\nclass Singleton{private static Singleton insta<\/p>\n","protected":false},"author":2,"featured_media":97517,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99,190],"topic":[],"class_list":["post-97522","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-java","tag-190"],"yoast_head":"\nJavaEE\u521d\u9636 \u591a\u7ebf\u7a0b\uff1a\u5355\u4f8b\u6a21\u5f0f | \u963b\u585e\u961f\u5217 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/97522.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaEE\u521d\u9636 \u591a\u7ebf\u7a0b\uff1a\u5355\u4f8b\u6a21\u5f0f | \u963b\u585e\u961f\u5217 - 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