{"id":16225,"date":"2023-02-12T17:01:18","date_gmt":"2023-02-12T09:01:18","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=16225"},"modified":"2023-02-12T17:01:22","modified_gmt":"2023-02-12T09:01:22","slug":"%e9%94%81%e4%bb%a3%e7%a0%81%e5%9d%97%e5%92%8c%e9%94%81%e6%96%b9%e6%b3%95%e6%9c%89%e5%95%a5%e5%8c%ba%e5%88%ab%e5%95%8a","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/16225.html","title":{"rendered":"\u9501\u4ee3\u7801\u5757\u548c\u9501\u65b9\u6cd5\u6709\u5565\u533a\u522b\u554a"},"content":{"rendered":"\n
\n

\u9501\u4ee3\u7801\u5757\u548c\u9501\u65b9\u6cd5\u7684\u6807\u51c6\u7684\u8bf4\u6cd5\u5e94\u8be5\u662f\u540c\u6b65\u4ee3\u7801\u5757\u548c\u540c\u6b65\u65b9\u6cd5\u3002\u533a\u522b\u662f\uff1a1.\u5199\u6cd5\uff1b2. \u9501\u7684\u8303\u56f4\uff1b3. \u9501\u7684\u7c7b\u578b\u3002\u5176\u4e2d\uff0c\u540c\u6b65\u4ee3\u7801\u5757\u662f\u5199\u5728\u65b9\u6cd5\u4e2d\u7684\uff1b\u540c\u6b65\u65b9\u6cd5\u662f\u901a\u8fc7\u5173\u952e\u5b57\u6807\u8bc6\u65b9\u6cd5\u3002<\/p>\n<\/blockquote>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u4e00\u3001\u9501\u4ee3\u7801\u5757\u548c\u9501\u65b9\u6cd5\u7684\u533a\u522b<\/strong><\/h2>\n\n\n\n

\u9501\u4ee3\u7801\u5757\u548c\u9501\u65b9\u6cd5\u7684\u6807\u51c6\u7684\u8bf4\u6cd5\u5e94\u8be5\u662f\u540c\u6b65\u4ee3\u7801\u5757\u548c\u540c\u6b65\u65b9\u6cd5\u3002\u533a\u522b\u662f\uff1a<\/p>\n\n\n\n

1.<\/strong>\u5199\u6cd5<\/strong><\/h3>\n\n\n\n

\u540c\u6b65\u4ee3\u7801\u5757\u662f\u5199\u5728\u65b9\u6cd5\u4e2d\u7684<\/p>\n\n\n\n

\u540c\u6b65\u65b9\u6cd5\u662f\u901a\u8fc7\u5173\u952e\u5b57\u6807\u8bc6\u65b9\u6cd5<\/p>\n\n\n\n

\/\/ \u540c\u6b65\u4ee3\u7801\u5757<\/p>\n\n\n\n

public void test2() {<\/p>\n\n\n\n

    synchronized (\u9501) {<\/p>\n\n\n\n

        \/\/ \u4ee3\u7801<\/p>\n\n\n\n

    }<\/p>\n\n\n\n

}<\/p>\n\n\n\n

\/\/ \u540c\u6b65\u65b9\u6cd5<\/p>\n\n\n\n

public synchronized void test1() {<\/p>\n\n\n\n

    \/\/ \u4ee3\u7801<\/p>\n\n\n\n

}<\/p>\n\n\n\n

2. <\/strong>\u9501\u7684\u8303\u56f4<\/strong><\/h3>\n\n\n\n

\u540c\u6b65\u4ee3\u7801\u5757\u7684\u8303\u56f4\u662f\u5b83\u5927\u62ec\u53f7\u6240\u5305\u542b\u7684\u6240\u6709\u4ee3\u7801<\/p>\n\n\n\n

\u540c\u6b65\u65b9\u6cd5\u7684\u8303\u56f4\u662f\u65b9\u6cd5\u4e2d\u7684\u6240\u6709\u4ee3\u7801<\/p>\n\n\n\n

3. <\/strong>\u9501\u7684\u7c7b\u578b<\/strong><\/h3>\n\n\n\n

\u540c\u6b65\u4ee3\u7801\u5757\u4f7f\u7528\u7684\u9501\u662f\u53ef\u4ee5\u81ea\u5b9a\u4e49\u7684\uff0c\u53ef\u4ee5\u662f\u4efb\u610f\u7684\u5bf9\u5e94\u6216\u8005\u7c7b(\u7c7b\u672c\u8d28\u4e5f\u662f\u4f20\u5165\u7684\u4e00\u4e2a\u5bf9\u8c61)<\/p>\n\n\n\n

\u540c\u6b65\u65b9\u6cd5\u4f7f\u7528\u7684\u9501\u662f\u56fa\u5b9a\u7684\uff0c\u6216\u8005\u8bf4\u662f\u89c4\u5b9a\u597d\u7684\u3002<\/p>\n\n\n\n

public class Test {<\/p>\n\n\n\n

  public static void main(String[] args){<\/p>\n\n\n\n

    Test t = new Test();<\/p>\n\n\n\n

    t.test3();<\/p>\n\n\n\n

  }<\/p>\n\n\n\n

  \/\/ \u4f7f\u7528\u5f53\u524d\u7c7b\u5bf9\u8c61\u4f5c\u4e3a\u9501\uff0c\u5728\u672c\u4f8b\u4e2d\u5c31\u662f\u4f7f\u7528 Test.class \u4f5c\u4e3a\u9501<\/p>\n\n\n\n

  public static synchronized void test1() {<\/p>\n\n\n\n

  }<\/p>\n\n\n\n

  \/\/ \u7b49\u540c\u4e8e<\/p>\n\n\n\n

  public void test2() {<\/p>\n\n\n\n

    synchronized (Test.class) {<\/p>\n\n\n\n

    }<\/p>\n\n\n\n

  }<\/p>\n\n\n\n

  \/\/ \u4f7f\u7528 this \u4f5c\u4e3a\u9501\uff0c\u5728\u672c\u4f8b\u4e2d\u5c31\u662f\u4f7f\u7528\u5bf9\u8c61 t \u4f5c\u4e3a\u9501<\/p>\n\n\n\n

  public synchronized void test3() {<\/p>\n\n\n\n

  }<\/p>\n\n\n\n

  \/\/ \u7b49\u540c\u4e8e<\/p>\n\n\n\n

  public void test4() {<\/p>\n\n\n\n

    synchronized (this) {<\/p>\n\n\n\n

    }<\/p>\n\n\n\n

  }<\/p>\n\n\n\n

}<\/p>\n\n\n\n

\u5ef6\u4f38\u9605\u8bfb\uff1a<\/strong><\/p>\n\n\n\n

\u4e8c\u3001Synchronized(this)\u9501\u4ee3\u7801\u5757<\/strong><\/h2>\n\n\n\n

\u7528\u5173\u952e\u5b57synchronized\u4fee\u9970\u65b9\u6cd5\u5728\u6709\u4e9b\u60c5\u51b5\u4e0b\u662f\u6709\u5f0a\u7aef\u7684\uff0c\u82e5\u662f\u6267\u884c\u8be5\u65b9\u6cd5\u6240\u9700\u7684\u65f6\u95f4\u6bd4\u8f83\u957f\uff0c\u7ebf\u7a0b1\u6267\u884c\u8be5\u65b9\u6cd5\u7684\u65f6\u5019\uff0c\u7ebf\u7a0b2\u5c31\u5fc5\u987b\u7b49\u5f85\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5c31\u53ef\u4ee5\u4f7f\u7528synchronized\u540c\u6b65\u8be5\u65b9\u6cd5\u4e2d\u4f1a\u5f15\u8d77\u7ebf\u7a0b\u5b89\u5168\u7684\u90a3\u90e8\u5206\u4ee3\u7801\uff0c\u5176\u4f59\u4e0d\u4f1a\u5f15\u8d77\u7ebf\u7a0b\u5b89\u5168\u7684\u5c31\u4e0d\u9700\u8981\u540c\u6b65\uff0c\u8fd9\u90e8\u5206\u4ee3\u7801\u5c31\u53ef\u4ee5\u591a\u7ebf\u7a0b\u5e76\u53d1\u6267\u884c\uff0c\u51cf\u5c11\u65f6\u95f4\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n\n\n\n

\u4e3e\u4f8b\uff1a\u591a\u7ebf\u7a0b\u6267\u884c\u540c\u4e00\u4e2a\u65b9\u6cd5\u65f6\uff0c\u540c\u6b65\u65b9\u6cd5\u548c\u540c\u6b65\u4ee3\u7801\u5757\u82b1\u8d39\u65f6\u95f4\u7684\u6bd4\u8f83<\/p>\n\n\n\n

synchronized\u4fee\u9970\u65b9\u6cd5\uff08\u540c\u6b65\u65b9\u6cd5\uff09<\/p>\n\n\n\n

synchronized\u4fee\u9970longTimeTask\u65b9\u6cd5\uff0c\u5176\u4e2d\u82b1\u8d39\u65f6\u95f4\u6bd4\u8f83\u957f\u7684\u4e14\u4e0e\u7ebf\u7a0b\u5b89\u5168\u65e0\u5173\u7684\u662f37-39\u884c\u4ee3\u7801\uff0c\u4f1a\u5f15\u8d77\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u7684\u662f42-46\u3002<\/p>\n\n\n\n

\u4ee5\u4e0a\u5c31\u662f\u5173\u4e8e\u9501\u4ee3\u7801\u5757\u548c\u9501\u65b9\u6cd5\u6709\u5565\u533a\u522b\u7684\u5185\u5bb9\u5e0c\u671b\u5bf9\u5927\u5bb6\u6709\u5e2e\u52a9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u9501\u4ee3\u7801\u5757\u548c\u9501\u65b9\u6cd5\u7684\u6807\u51c6\u7684\u8bf4\u6cd5\u5e94\u8be5\u662f\u540c\u6b65\u4ee3\u7801\u5757\u548c\u540c\u6b65\u65b9\u6cd5\u3002\u533a\u522b\u662f\uff1a1.\u5199\u6cd5\uff1b2. \u9501\u7684\u8303\u56f4\uff1b3. \u9501\u7684\u7c7b\u578b\u3002\u5176\u4e2d […]","protected":false},"author":1,"featured_media":16226,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/16225"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=16225"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/16225\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/16226"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=16225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=16225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=16225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}