{"id":11568,"date":"2023-11-28T22:25:16","date_gmt":"2023-11-28T14:25:16","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=11568"},"modified":"2023-12-11T11:20:57","modified_gmt":"2023-12-11T03:20:57","slug":"spring-zhong-shen-me-shi-tong-zhi-advice","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/spring-zhong-shen-me-shi-tong-zhi-advice\/","title":{"rendered":"Spring\u4e2d\u4ec0\u4e48\u662f\u901a\u77e5(Advice)?"},"content":{"rendered":"<p>\u5728Spring\u6846\u67b6\u4e2d\uff0c\u901a\u77e5\uff08Advice\uff09\u662f\u9762\u5411\u5207\u9762\u7f16\u7a0b\uff08AOP\uff09\u7684\u6838\u5fc3\u6982\u5ff5\u4e4b\u4e00\u3002\u901a\u77e5\u5b9a\u4e49\u4e86\u5728\u76ee\u6807\u65b9\u6cd5\u6267\u884c\u7684\u4e0d\u540c\u9636\u6bb5\uff0c\u5207\u9762\u8981\u6267\u884c\u7684\u5177\u4f53\u64cd\u4f5c\u3002\u901a\u77e5\u7684\u4f5c\u7528\u662f\u5141\u8bb8\u5f00\u53d1\u8005\u5c06\u6a2a\u5207\u5173\u6ce8\u70b9\uff08cross-cutting concerns\uff09\u4ece\u4e1a\u52a1\u903b\u8f91\u4e2d\u62bd\u79bb\u51fa\u6765\uff0c\u5b9e\u73b0\u66f4\u52a0\u6a21\u5757\u5316\u548c\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801\u7ed3\u6784\u3002<\/p>\n<p>\u901a\u77e5\u53ef\u4ee5\u5728\u76ee\u6807\u65b9\u6cd5\u6267\u884c\u7684\u4e0d\u540c\u65f6\u673a\u63d2\u5165\uff0c\u5e38\u89c1\u7684\u901a\u77e5\u7c7b\u578b\u6709\uff1a<\/p>\n<ol>\n<li>\n<strong>\u524d\u7f6e\u901a\u77e5\uff08Before Advice\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u5728\u76ee\u6807\u65b9\u6cd5\u6267\u884c\u4e4b\u524d\u6267\u884c\u7684\u901a\u77e5\u3002\u524d\u7f6e\u901a\u77e5\u53ef\u4ee5\u7528\u4e8e\u6267\u884c\u4e00\u4e9b\u9884\u5904\u7406\u64cd\u4f5c\uff0c\u4f8b\u5982\u6743\u9650\u68c0\u67e5\u3001\u53c2\u6570\u9a8c\u8bc1\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u540e\u7f6e\u901a\u77e5\uff08After Returning Advice\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u5728\u76ee\u6807\u65b9\u6cd5\u6210\u529f\u6267\u884c\u540e\u6267\u884c\u7684\u901a\u77e5\u3002\u540e\u7f6e\u901a\u77e5\u53ef\u4ee5\u7528\u4e8e\u6267\u884c\u4e00\u4e9b\u6e05\u7406\u64cd\u4f5c\uff0c\u6216\u8005\u5904\u7406\u76ee\u6807\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u5f02\u5e38\u901a\u77e5\uff08After Throwing Advice\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u5728\u76ee\u6807\u65b9\u6cd5\u629b\u51fa\u5f02\u5e38\u65f6\u6267\u884c\u7684\u901a\u77e5\u3002\u5f02\u5e38\u901a\u77e5\u53ef\u4ee5\u7528\u4e8e\u5904\u7406\u76ee\u6807\u65b9\u6cd5\u629b\u51fa\u7684\u5f02\u5e38\uff0c\u6267\u884c\u4e00\u4e9b\u7279\u5b9a\u7684\u5f02\u5e38\u5904\u7406\u903b\u8f91\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u6700\u7ec8\u901a\u77e5\uff08After (finally) Advice\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u65e0\u8bba\u76ee\u6807\u65b9\u6cd5\u5982\u4f55\u6267\u884c\uff0c\u6700\u7ec8\u901a\u77e5\u90fd\u4f1a\u5728\u76ee\u6807\u65b9\u6cd5\u6267\u884c\u540e\u6267\u884c\u3002\u6700\u7ec8\u901a\u77e5\u53ef\u4ee5\u7528\u4e8e\u6267\u884c\u4e00\u4e9b\u5fc5\u8981\u7684\u6e05\u7406\u5de5\u4f5c\uff0c\u65e0\u8bba\u662f\u5426\u53d1\u751f\u5f02\u5e38\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u73af\u7ed5\u901a\u77e5\uff08Around Advice\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u5728\u76ee\u6807\u65b9\u6cd5\u6267\u884c\u524d\u540e\u90fd\u6267\u884c\u7684\u901a\u77e5\u3002\u73af\u7ed5\u901a\u77e5\u5177\u6709\u66f4\u5927\u7684\u7075\u6d3b\u6027\uff0c\u53ef\u4ee5\u5b8c\u5168\u63a7\u5236\u76ee\u6807\u65b9\u6cd5\u7684\u6267\u884c\uff0c\u5305\u62ec\u662f\u5426\u6267\u884c\u3001\u4f55\u65f6\u6267\u884c\u4ee5\u53ca\u5982\u4f55\u6267\u884c\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u901a\u77e5\u7531\u5207\u9762\uff08Aspect\uff09\u4e2d\u7684\u65b9\u6cd5\u6765\u5b9e\u73b0\uff0c\u5e76\u4e0e\u5207\u70b9\uff08Pointcut\uff09\u7ed3\u5408\u4f7f\u7528\uff0c\u5207\u70b9\u5b9a\u4e49\u4e86\u5728\u54ea\u4e9b\u8fde\u63a5\u70b9\uff08Join Point\uff09\u4e0a\u5e94\u7528\u901a\u77e5\u3002\u5207\u70b9\u548c\u901a\u77e5\u4e00\u8d77\u7ec4\u6210\u4e86\u5207\u9762\uff0c\u5207\u9762\u7528\u4e8e\u5b9a\u4e49\u6a2a\u5207\u5173\u6ce8\u70b9\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u6f14\u793a\u4e86\u5982\u4f55\u5728Spring\u4e2d\u5b9a\u4e49\u4e00\u4e2a\u5207\u9762\u548c\u4f7f\u7528\u901a\u77e5\uff1a<\/p>\n<pre><code class=\"language-java\">import org.aspectj.lang.annotation.AfterReturning;\nimport org.aspectj.lang.annotation.Aspect;\nimport org.aspectj.lang.annotation.Before;\nimport org.springframework.stereotype.Component;\n\n@Aspect\n@Component\npublic class MyAspect {\n\n    @Before(&quot;execution(* com.example.MyService.*(..))&quot;)\n    public void beforeAdvice() {\n        \/\/ \u524d\u7f6e\u901a\u77e5\u903b\u8f91\n        System.out.println(&quot;Before advice executed&quot;);\n    }\n\n    @AfterReturning(&quot;execution(* com.example.MyService.*(..))&quot;)\n    public void afterReturningAdvice() {\n        \/\/ \u540e\u7f6e\u901a\u77e5\u903b\u8f91\n        System.out.println(&quot;After returning advice executed&quot;);\n    }\n}\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\uff0c<code>MyAspect<\/code> \u7c7b\u4f7f\u7528\u4e86<code>@Aspect<\/code>\u6ce8\u89e3\u6807\u8bc6\u4e3a\u4e00\u4e2a\u5207\u9762\uff0c\u5e76\u5b9a\u4e49\u4e86\u524d\u7f6e\u901a\u77e5\u548c\u540e\u7f6e\u901a\u77e5\u3002\u8fd9\u4e2a\u5207\u9762\u4f1a\u5728<code>com.example.MyService<\/code> \u5305\u4e0b\u7684\u6240\u6709\u65b9\u6cd5\u6267\u884c\u4e4b\u524d\u548c\u4e4b\u540e\u5206\u522b\u6267\u884c\u76f8\u5173\u901a\u77e5\u903b\u8f91\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Spring\u6846\u67b6\u4e2d\uff0c\u901a\u77e5\uff08Advice\uff09\u662f\u9762\u5411\u5207\u9762\u7f16\u7a0b\uff08AOP\uff09\u7684\u6838\u5fc3\u6982\u5ff5\u4e4b\u4e00\u3002\u901a\u77e5\u5b9a\u4e49\u4e86\u5728\u76ee\u6807\u65b9\u6cd5\u6267\u884c\u7684\u4e0d [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121],"tags":[],"class_list":["post-11568","post","type-post","status-publish","format-standard","hentry","category-spring"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11568","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=11568"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11568\/revisions"}],"predecessor-version":[{"id":17079,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11568\/revisions\/17079"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=11568"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=11568"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=11568"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}