{"id":1406,"date":"2023-03-19T11:31:36","date_gmt":"2023-03-19T03:31:36","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1406"},"modified":"2023-04-28T21:08:29","modified_gmt":"2023-04-28T13:08:29","slug":"difference-and-use-of-handlerinterceptor-and-filter-in-spring-boot","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/19\/difference-and-use-of-handlerinterceptor-and-filter-in-spring-boot\/","title":{"rendered":"Spring Boot\u4e2dHandlerInterceptor\u548cFilter\u533a\u522b\u53ca\u4f7f\u7528"},"content":{"rendered":"<blockquote>\n<p>Filter\u662f\u5bb9\u5668\uff08Tomcat\uff09\u7ea7\u522b\uff0cHandlerInterceptor\u662f\u5e94\u7528\u7ea7\u522b<\/p>\n<\/blockquote>\n<p>\u56e0\u4e3aFilter\u662f\u4f5c\u7528\u5728Servlet\u524d\uff0cInterceptor\u6267\u884c\u5728Controller\u524d\uff0c\u6240\u4ee5\u6b63\u786e\u7684\u5904\u7406\u6d41\u7a0b\u662f\uff1a<\/p>\n<p>Filter\u524d\u5904\u7406 &#8211;&gt; Interceptor\u524d\u5904\u7406 &#8211;&gt; Controller&#8211;&gt; Interceptor\u540e\u5904\u7406 &#8211;&gt; Filter\u540e\u5904\u7406<\/p>\n<p><!-- more --><\/p>\n<h2>\u8fc7\u6ee4\u5668\uff08Filter\uff09<\/h2>\n<p>Servlet\u4e2d\u7684\u8fc7\u6ee4\u5668Filter\u662f\u5b9e\u73b0\u4e86<code>javax.servlet.Filter<\/code>\u63a5\u53e3\u7684\u670d\u52a1\u5668\u7aef\u7a0b\u5e8f\uff0c\u4e3b\u8981\u7684\u7528\u9014\u662f\u8bbe\u7f6e\u5b57\u7b26\u96c6\u3001\u63a7\u5236\u6743\u9650\u3001\u63a7\u5236\u8f6c\u5411\u3001\u505a\u4e00\u4e9b\u4e1a\u52a1\u903b\u8f91\u5224\u65ad\u7b49\u3002\u5176\u5de5\u4f5c\u539f\u7406\u662f\uff0c\u53ea\u8981\u4f60\u5728<code>web.xml<\/code>\u6587\u4ef6\u914d\u7f6e\u597d\u8981\u62e6\u622a\u7684\u5ba2\u6237\u7aef\u8bf7\u6c42\uff0c\u5b83\u90fd\u4f1a\u5e2e\u4f60\u62e6\u622a\u5230\u8bf7\u6c42\uff0c\u6b64\u65f6\u4f60\u5c31\u53ef\u4ee5\u5bf9\u8bf7\u6c42\u6216\u54cd\u5e94(Request\u3001Response)\u7edf\u4e00\u8bbe\u7f6e\u7f16\u7801\uff0c\u7b80\u5316\u64cd\u4f5c\uff1b\u540c\u65f6\u8fd8\u53ef\u8fdb\u884c\u903b\u8f91\u5224\u65ad\uff0c\u5982\u7528\u6237\u662f\u5426\u5df2\u7ecf\u767b\u9646\u3001\u6709\u6ca1\u6709\u6743\u9650\u8bbf\u95ee\u8be5\u9875\u9762\u7b49\u7b49\u5de5\u4f5c\u3002\u5b83\u662f\u968f\u4f60\u7684web\u5e94\u7528\u542f\u52a8\u800c\u542f\u52a8\u7684\uff0c\u53ea\u521d\u59cb\u5316\u4e00\u6b21\uff0c\u4ee5\u540e\u5c31\u53ef\u4ee5\u62e6\u622a\u76f8\u5173\u8bf7\u6c42\uff0c\u53ea\u6709\u5f53\u4f60\u7684web\u5e94\u7528\u505c\u6b62\u6216\u91cd\u65b0\u90e8\u7f72\u7684\u65f6\u5019\u624d\u9500\u6bc1\u3002<\/p>\n<p>Filter\u53ef\u4ee5\u8ba4\u4e3a\u662fServlet\u7684\u4e00\u79cd\u201c\u52a0\u5f3a\u7248\u201d\uff0c\u5b83\u4e3b\u8981\u7528\u4e8e\u5bf9\u7528\u6237\u8bf7\u6c42\u8fdb\u884c\u9884\u5904\u7406\uff0c\u4e5f\u53ef\u4ee5\u5bf9<code>HttpServletResponse<\/code>\u8fdb\u884c\u540e\u5904\u7406\uff0c\u662f\u4e2a\u5178\u578b\u7684\u5904\u7406\u94fe\u3002Filter\u4e5f\u53ef\u4ee5\u5bf9\u7528\u6237\u8bf7\u6c42\u751f\u6210\u54cd\u5e94\uff0c\u8fd9\u4e00\u70b9\u4e0eServlet\u76f8\u540c\uff0c\u4f46\u5b9e\u9645\u4e0a\u5f88\u5c11\u4f1a\u4f7f\u7528Filter\u5411\u7528\u6237\u8bf7\u6c42\u751f\u6210\u54cd\u5e94\u3002\u4f7f\u7528Filter\u5b8c\u6574\u7684\u6d41\u7a0b\u662f\uff1aFilter\u5bf9\u7528\u6237\u8bf7\u6c42\u8fdb\u884c\u9884\u5904\u7406\uff0c\u63a5\u7740\u5c06\u8bf7\u6c42\u4ea4\u7ed9Servlet\u8fdb\u884c\u5904\u7406\u5e76\u751f\u6210\u54cd\u5e94\uff0c\u6700\u540eFilter\u518d\u5bf9\u670d\u52a1\u5668\u54cd\u5e94\u8fdb\u884c\u540e\u5904\u7406\u3002<\/p>\n<p>Filter\u4f5c\u7528\uff1a<\/p>\n<ul>\n<li>\u5728<code>HttpServletRequest<\/code>\u5230\u8fbeServlet\u4e4b\u524d\uff0c\u62e6\u622a\u5ba2\u6237\u7684<code>HttpServletRequest<\/code><\/li>\n<li>\u6839\u636e\u9700\u8981\u68c0\u67e5<code>HttpServletRequest<\/code>\uff0c\u4e5f\u53ef\u4ee5\u4fee\u6539<code>HttpServletRequest<\/code>\u5934\u548c\u6570\u636e\u3002<\/li>\n<li>\u5728<code>HttpServletResponse<\/code>\u5230\u8fbe\u5ba2\u6237\u7aef\u4e4b\u524d\uff0c\u62e6\u622a<code>HttpServletResponse<\/code><\/li>\n<li>\u6839\u636e\u9700\u8981\u68c0\u67e5<code>HttpServletResponse<\/code>\uff0c\u4e5f\u53ef\u4ee5\u4fee\u6539<code>HttpServletResponse<\/code>\u5934\u548c\u6570\u636e\u3002<\/li>\n<\/ul>\n<p>Filter\u79cd\u7c7b\uff1a<\/p>\n<ul>\n<li>\u7528\u6237\u6388\u6743\u7684Filter\uff1aFilter\u8d1f\u8d23\u68c0\u67e5\u7528\u6237\u8bf7\u6c42\uff0c\u6839\u636e\u8bf7\u6c42\u8fc7\u6ee4\u7528\u6237\u975e\u6cd5\u8bf7\u6c42<\/li>\n<li>\u65e5\u5fd7Filter\uff1a\u8be6\u7ec6\u8bb0\u5f55\u67d0\u4e9b\u7279\u6b8a\u7684\u7528\u6237\u8bf7\u6c42<\/li>\n<li>\u8d1f\u8d23\u89e3\u7801\u7684Filter:\u5305\u62ec\u5bf9\u975e\u6807\u51c6\u7f16\u7801\u7684\u8bf7\u6c42\u89e3\u7801<\/li>\n<li>\u80fd\u6539\u53d8XML\u5185\u5bb9\u7684XSLT Filter\u7b49<\/li>\n<li>Filter\u53ef\u4ee5\u8d1f\u8d23\u62e6\u622a\u591a\u4e2a\u8bf7\u6c42\u6216\u54cd\u5e94\uff1b\u4e00\u4e2a\u8bf7\u6c42\u6216\u54cd\u5e94\u4e5f\u53ef\u4ee5\u88ab\u591a\u4e2aFilter\u62e6\u622a\u3002<\/li>\n<\/ul>\n<h2>\u521b\u5efaFilter\u65b9\u6cd5<\/h2>\n<p>\u521b\u5efaFilter\u5fc5\u987b\u5b9e\u73b0<code>javax.servlet.Filter<\/code>\u63a5\u53e3\uff0c\u5728\u8be5\u63a5\u53e3\u4e2d\u5b9a\u4e49\u4e86\u5982\u4e0b\u4e09\u4e2a\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li><code>void init(FilterConfig config)<\/code>: \u7528\u4e8e\u5b8c\u6210Filter\u7684\u521d\u59cb\u5316<\/li>\n<li><code>void destory()<\/code>: \u7528\u4e8eFilter\u9500\u6bc1\u524d\uff0c\u5b8c\u6210\u67d0\u4e9b\u8d44\u6e90\u7684\u56de\u6536<\/li>\n<li><code>void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)<\/code>: \u5b9e\u73b0\u8fc7\u6ee4\u529f\u80fd\uff0c\u8be5\u65b9\u6cd5\u5c31\u662f\u5bf9\u6bcf\u4e2a\u8bf7\u6c42\u53ca\u54cd\u5e94\u589e\u52a0\u7684\u989d\u5916\u5904\u7406\u3002\u8be5\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u7528\u6237\u8bf7\u6c42\u8fdb\u884c\u9884\u5904\u7406(ServletRequest request)\uff0c\u4e5f\u53ef\u5b9e\u73b0\u5bf9\u670d\u52a1\u5668\u54cd\u5e94\u8fdb\u884c\u540e\u5904\u7406(ServletResponse response)\u3002\u5b83\u4eec\u7684\u5206\u754c\u7ebf\u4e3a\u662f\u5426\u8c03\u7528\u4e86<code>chain.doFilter()<\/code>\uff0c\u6267\u884c\u8be5\u65b9\u6cd5\u4e4b\u524d\uff0c\u5373\u5bf9\u7528\u6237\u8bf7\u6c42\u8fdb\u884c\u9884\u5904\u7406\uff1b\u6267\u884c\u8be5\u65b9\u6cd5\u4e4b\u540e\uff0c\u5373\u5bf9\u670d\u52a1\u5668\u54cd\u5e94\u8fdb\u884c\u540e\u5904\u7406\u3002<\/li>\n<\/ul>\n<h3>\u65b9\u6cd5\u4e00<\/h3>\n<pre><code class=\"language-java\">@WebFilter(filterName = &quot;myFilter&quot;, urlPatterns = &quot;\/*&quot;)\npublic class MyFilter implements Filter {\n    @Override\n    public void init(FilterConfig filterConfig) throws ServletException {\n    }\n\n    @Override\n    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) {\n    }\n\n    @Override\n    public void destroy() {\n    }\n}<\/code><\/pre>\n<pre><code class=\"language-java\">@SpringBootApplication\n@EnableAutoConfiguration\n@EnableWebMvc\n@ServletComponentScan(basePackages = &quot;cn.appblog.test.filter&quot;) \/\/\u6240\u626b\u63cf\u7684\u5305\u8def\u5f84\u5fc5\u987b\u5305\u542b\u8be5Filter\npublic class Application {\n\n    public static void main(String[] args) {\n        SpringApplication.run(Application .class, args);\n    }\n}<\/code><\/pre>\n<blockquote>\n<p>\u7279\u522b\u6ce8\u610f\uff1a<code>@ServletComponentScan<\/code>\u6240\u626b\u63cf\u7684\u5305\u8def\u5f84\u5fc5\u987b\u5305\u542b\u8be5Filter<\/p>\n<\/blockquote>\n<h3>\u65b9\u6cd5\u4e8c<\/h3>\n<pre><code class=\"language-java\">@Configuration\npublic class FilterConfig {\n    @Bean\n    public FilterRegistrationBean filterRegistrationBean() {\n        FilterRegistrationBean bean = new FilterRegistrationBean();\n        bean.setFilter(new MyFilter2());\n        bean.addUrlPatterns(&quot;\/*&quot;);\n        return bean;\n    }\n}<\/code><\/pre>\n<h3>\u65b9\u6cd5\u4e09<\/h3>\n<pre><code class=\"language-java\">@Bean(&quot;proxyFilter&quot;)\npublic Filter filter () {\n    return new Filter() {\n        @Override\n        public void init(javax.servlet.FilterConfig filterConfig) throws ServletException {\n        }\n\n        @Override\n        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) {\n        }\n\n        @Override\n        public void destroy() {\n        }\n    };\n}\n\n@Bean\npublic DelegatingFilterProxyRegistrationBean delegatingFilterProxyRegistrationBean(){\n    DelegatingFilterProxyRegistrationBean bean = new DelegatingFilterProxyRegistrationBean(&quot;proxyFilter&quot;);\n    bean.addUrlPatterns(&quot;\/*&quot;);\n    return bean;\n}<\/code><\/pre>\n<h3>\u65b9\u6cd5\u56db<\/h3>\n<pre><code class=\"language-java\">@Bean(&quot;myFilter&quot;)\npublic Filter filter () {\n    return new Filter() {\n        @Override\n        public void init(javax.servlet.FilterConfig filterConfig) throws ServletException {\n        }\n\n        @Override\n        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) {\n        }\n\n        @Override\n        public void destroy() {\n        }\n    };\n}<\/code><\/pre>\n<ul>\n<li>\u65b9\u6cd5\u4e8c\u548c\u65b9\u6cd5\u4e09\u7c7b\u4f3c\uff0c\u5747\u5b9e\u73b0\u4e86<code>AbstractFilterRegistrationBean<\/code>\u63a5\u53e3\uff0c\u800c\u8be5\u63a5\u53e3\u95f4\u63a5\u5b9e\u73b0\u4e86<code>ServletContextInitializer<\/code>\u3002Spring Boot\u5728\u542f\u52a8\u5bb9\u5668\u540e\u4f1a\u67e5\u627e\u5b9e\u73b0\u8be5\u63a5\u53e3\u7684Bean\uff0c\u5e76\u8c03\u7528<code>onStartup()<\/code>\u65b9\u6cd5\u6dfb\u52a0\u81ea\u5b9a\u4e49\u7684Filter\u3002\u4e24\u5219\u7684\u533a\u522b <code>DelegatingFilterProxyRegistrationBean<\/code>\u901a\u8fc7\u4f20\u5165\u7684proxyFilter\u540d\u5b57\uff0c\u5728<code>WebApplicationContext<\/code>\u67e5\u627e\u8be5Fillter Bean\uff0c\u5e76\u901a\u8fc7<code>DelegatingFilterProxy<\/code>\u751f\u6210\u57fa\u4e8e\u8be5Bean\u7684\u4ee3\u7406Filter\u5bf9\u8c61\uff1b\u800c<code>FilterRegistrationBean<\/code>\u5219\u662f\u76f4\u63a5\u8bbe\u7f6e\u4e00\u4e2aFilter\uff0c\u56e0\u6b64\u8be5Filter\u53ef\u4ee5\u6709Spring\u5bb9\u5668\u7ba1\u7406\uff0c\u4e5f\u53ef\u4e0d\u7528Spring\u7ba1\u7406\u3002\u6ce8\u610f\uff1a\u5982\u679cFilter\u58f0\u660e\u4e3a\u4e00\u4e2aBean\uff0c\u5219\u4e0d\u9700\u8981\u5b9a\u4e49\u4e3a<code>FilterRegistrationBean<\/code>\uff0c\u4e5f\u4f1a\u88abSpring\u53d1\u73b0\u5e76\u6dfb\u52a0\uff0c\u5c31\u662f\u65b9\u6cd5\u56db\uff0c\u8be5\u65b9\u5f0f\u65e0\u6cd5\u5b9a\u4e49\u62e6\u622a\u89c4\u5219\u7b49\uff0c\u9ed8\u8ba4\u5168\u5c40\uff0c\u614e\u7528\u3002<\/li>\n<li><code>void init(FilterConfig paramFilterConfig)<\/code>\u00a0\u2013 \u5f53\u5bb9\u5668\u521d\u59cb\u5316 Filter \u65f6\u8c03\u7528\uff0c\u8be5\u65b9\u6cd5\u5728 Filter \u7684\u751f\u547d\u5468\u671f\u53ea\u4f1a\u88ab\u8c03\u7528\u4e00\u6b21\uff0c\u4e00\u822c\u5728\u8be5\u65b9\u6cd5\u4e2d\u521d\u59cb\u5316\u4e00\u4e9b\u8d44\u6e90\uff0cFilterConfig \u662f\u5bb9\u5668\u63d0\u4f9b\u7ed9 Filter \u7684\u521d\u59cb\u5316\u53c2\u6570\uff0c\u5728\u8be5\u65b9\u6cd5\u4e2d\u53ef\u4ee5\u629b\u51fa ServletException\u3002init \u65b9\u6cd5\u5fc5\u987b\u6267\u884c\u6210\u529f\uff0c\u5426\u5219 Filter \u53ef\u80fd\u4e0d\u8d77\u4f5c\u7528\uff0c\u51fa\u73b0\u4ee5\u4e0b\u4e24\u79cd\u60c5\u51b5\u65f6\uff0cweb \u5bb9\u5668\u4e2d Filter \u53ef\u80fd\u65e0\u6548\uff1a 1\uff09\u629b\u51fa ServletException 2\uff09\u8d85\u8fc7 web \u5bb9\u5668\u5b9a\u4e49\u7684\u6267\u884c\u65f6\u95f4\u3002<\/li>\n<li><code>doFilter(ServletRequest paramServletRequest, ServletResponse paramServletResponse, FilterChain paramFilterChain)<\/code>\u00a0\u2013 Web \u5bb9\u5668\u6bcf\u4e00\u6b21\u8bf7\u6c42\u90fd\u4f1a\u8c03\u7528\u8be5\u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u5c06\u5bb9\u5668\u7684\u8bf7\u6c42\u548c\u54cd\u5e94\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u8fdb\u6765\uff0cFilterChain \u7528\u6765\u8c03\u7528\u4e0b\u4e00\u4e2a Filter\u3002<\/li>\n<\/ul>\n<h2>\u62e6\u622a\u5668\uff08HandlerInterceptor\uff09<\/h2>\n<p><code>HandlerInterceptor<\/code>\u7684\u529f\u80fd\u8ddf\u8fc7\u6ee4\u5668\u7c7b\u4f3c\uff0c\u4f46\u662f\u63d0\u4f9b\u66f4\u7cbe\u7ec6\u7684\u7684\u63a7\u5236\u80fd\u529b\uff1a\u5728request\u88ab\u54cd\u5e94\u4e4b\u524d\u3001request\u88ab\u54cd\u5e94\u4e4b\u540e\u3001\u89c6\u56fe\u6e32\u67d3\u4e4b\u524d\u4ee5\u53carequest\u5168\u90e8\u7ed3\u675f\u4e4b\u540e\u3002\u6211\u4eec\u4e0d\u80fd\u901a\u8fc7\u62e6\u622a\u5668\u4fee\u6539request\u5185\u5bb9\uff0c\u4f46\u662f\u53ef\u4ee5\u901a\u8fc7\u629b\u51fa\u5f02\u5e38\uff08\u6216\u8005\u8fd4\u56defalse\uff09\u6765\u6682\u505crequest\u7684\u6267\u884c\u3002<\/p>\n<p>SpringMVC\u00a0\u4e2d\u7684Interceptor\u00a0\u62e6\u622a\u8bf7\u6c42\u662f\u901a\u8fc7<code>HandlerInterceptor<\/code>\u6765\u5b9e\u73b0\u7684\u3002\u5728SpringMVC\u00a0\u4e2d\u5b9a\u4e49\u4e00\u4e2aInterceptor\u00a0\u975e\u5e38\u7b80\u5355\uff0c\u4e3b\u8981\u6709\u4e24\u79cd\u65b9\u5f0f\uff0c\u7b2c\u4e00\u79cd\u65b9\u5f0f\u662f\u8981\u5b9a\u4e49\u7684Interceptor\u7c7b\u8981\u5b9e\u73b0\u4e86Spring\u00a0\u7684<code>HandlerInterceptor<\/code>\u63a5\u53e3\uff0c\u6216\u8005\u662f\u8fd9\u4e2a\u7c7b\u7ee7\u627f\u5b9e\u73b0\u4e86<code>HandlerInterceptor<\/code>\u63a5\u53e3\u7684\u7c7b\uff0c\u6bd4\u5982Spring\u00a0\u5df2\u7ecf\u63d0\u4f9b\u7684\u5b9e\u73b0\u4e86<code>HandlerInterceptor<\/code>\u63a5\u53e3\u7684\u62bd\u8c61\u7c7b<code>HandlerInterceptorAdapter<\/code>\uff1b\u7b2c\u4e8c\u79cd\u65b9\u5f0f\u662f\u5b9e\u73b0Spring\u7684<code>WebRequestInterceptor<\/code>\u63a5\u53e3\uff0c\u6216\u8005\u662f\u7ee7\u627f\u5b9e\u73b0\u4e86<code>WebRequestInterceptor<\/code>\u7684\u7c7b\u3002<\/p>\n<p>\uff081\uff09<code>preHandle(HttpServletRequest request, HttpServletResponse response, Object handle)<\/code>\u65b9\u6cd5\uff0c\u987e\u540d\u601d\u4e49\uff0c\u8be5\u65b9\u6cd5\u5c06\u5728\u8bf7\u6c42\u5904\u7406\u4e4b\u524d\u8fdb\u884c\u8c03\u7528\u3002SpringMVC\u00a0\u4e2d\u7684Interceptor\u00a0\u662f\u94fe\u5f0f\u7684\u8c03\u7528\u7684\uff0c\u5728\u4e00\u4e2a\u5e94\u7528\u4e2d\u6216\u8005\u8bf4\u662f\u5728\u4e00\u4e2a\u8bf7\u6c42\u4e2d\u53ef\u4ee5\u540c\u65f6\u5b58\u5728\u591a\u4e2aInterceptor\u3002\u6bcf\u4e2aInterceptor\u00a0\u7684\u8c03\u7528\u4f1a\u4f9d\u636e\u5b83\u7684\u58f0\u660e\u987a\u5e8f\u4f9d\u6b21\u6267\u884c\uff0c\u800c\u4e14\u6700\u5148\u6267\u884c\u7684\u90fd\u662fInterceptor\u00a0\u4e2d\u7684preHandle\u00a0\u65b9\u6cd5\uff0c\u6240\u4ee5\u53ef\u4ee5\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u8fdb\u884c\u4e00\u4e9b\u524d\u7f6e\u521d\u59cb\u5316\u64cd\u4f5c\u6216\u8005\u662f\u5bf9\u5f53\u524d\u8bf7\u6c42\u7684\u4e00\u4e2a\u9884\u5904\u7406\uff0c\u4e5f\u53ef\u4ee5\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u8fdb\u884c\u4e00\u4e9b\u5224\u65ad\u6765\u51b3\u5b9a\u8bf7\u6c42\u662f\u5426\u8981\u7ee7\u7eed\u8fdb\u884c\u4e0b\u53bb\u3002\u8be5\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u662f\u5e03\u5c14\u503cBoolean\u7c7b\u578b\u7684\uff0c\u5f53\u5b83\u8fd4\u56de\u4e3afalse\u00a0\u65f6\uff0c\u8868\u793a\u8bf7\u6c42\u7ed3\u675f\uff0c\u540e\u7eed\u7684Interceptor\u00a0\u548cController\u00a0\u90fd\u4e0d\u4f1a\u518d\u6267\u884c\uff1b\u5f53\u8fd4\u56de\u503c\u4e3atrue\u00a0\u65f6\u5c31\u4f1a\u7ee7\u7eed\u8c03\u7528\u4e0b\u4e00\u4e2aInterceptor\u00a0\u7684preHandle\u00a0\u65b9\u6cd5\uff0c\u5982\u679c\u5df2\u7ecf\u662f\u6700\u540e\u4e00\u4e2aInterceptor\u00a0\u7684\u65f6\u5019\u5c31\u4f1a\u662f\u8c03\u7528\u5f53\u524d\u8bf7\u6c42\u7684Controller\u00a0\u65b9\u6cd5\u3002<\/p>\n<p>\uff082\uff09<code>postHandle(HttpServletRequest request, HttpServletResponse response, Object handle, ModelAndView modelAndView)<\/code>\u65b9\u6cd5\uff0c\u7531preHandle\u00a0\u65b9\u6cd5\u7684\u89e3\u91ca\u6211\u4eec\u77e5\u9053\u8fd9\u4e2a\u65b9\u6cd5\u5305\u62ec\u540e\u9762\u8981\u8bf4\u5230\u7684afterCompletion\u00a0\u65b9\u6cd5\u90fd\u53ea\u80fd\u662f\u5728\u5f53\u524d\u6240\u5c5e\u7684Interceptor\u00a0\u7684preHandle\u00a0\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u4e3atrue\u00a0\u65f6\u624d\u80fd\u88ab\u8c03\u7528\u3002postHandle\u00a0\u65b9\u6cd5\uff0c\u987e\u540d\u601d\u4e49\u5c31\u662f\u5728\u5f53\u524d\u8bf7\u6c42\u8fdb\u884c\u5904\u7406\u4e4b\u540e\uff0c\u4e5f\u5c31\u662fController\u00a0\u65b9\u6cd5\u8c03\u7528\u4e4b\u540e\u6267\u884c\uff0c\u4f46\u662f\u5b83\u4f1a\u5728DispatcherServlet\u00a0\u8fdb\u884c\u89c6\u56fe\u8fd4\u56de\u6e32\u67d3\u4e4b\u524d\u88ab\u8c03\u7528\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u5bf9Controller\u00a0\u5904\u7406\u4e4b\u540e\u7684ModelAndView\u00a0\u5bf9\u8c61\u8fdb\u884c\u64cd\u4f5c\u3002postHandle\u00a0\u65b9\u6cd5\u88ab\u8c03\u7528\u7684\u65b9\u5411\u8ddfpreHandle\u00a0\u662f\u76f8\u53cd\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u5148\u58f0\u660e\u7684Interceptor\u00a0\u7684postHandle\u00a0\u65b9\u6cd5\u53cd\u800c\u4f1a\u540e\u6267\u884c\uff0c\u8fd9\u548cStruts2\u00a0\u91cc\u9762\u7684Interceptor\u00a0\u7684\u6267\u884c\u8fc7\u7a0b\u6709\u70b9\u7c7b\u578b\u3002Struts2\u00a0\u91cc\u9762\u7684Interceptor\u00a0\u7684\u6267\u884c\u8fc7\u7a0b\u4e5f\u662f\u94fe\u5f0f\u7684\uff0c\u53ea\u662f\u5728Struts2\u00a0\u91cc\u9762\u9700\u8981\u624b\u52a8\u8c03\u7528ActionInvocation\u00a0\u7684invoke\u00a0\u65b9\u6cd5\u6765\u89e6\u53d1\u5bf9\u4e0b\u4e00\u4e2aInterceptor\u00a0\u6216\u8005\u662fAction\u00a0\u7684\u8c03\u7528\uff0c\u7136\u540e\u6bcf\u4e00\u4e2aInterceptor\u00a0\u4e2d\u5728invoke\u00a0\u65b9\u6cd5\u8c03\u7528\u4e4b\u524d\u7684\u5185\u5bb9\u90fd\u662f\u6309\u7167\u58f0\u660e\u987a\u5e8f\u6267\u884c\u7684\uff0c\u800cinvoke\u00a0\u65b9\u6cd5\u4e4b\u540e\u7684\u5185\u5bb9\u5c31\u662f\u53cd\u5411\u7684\u3002<\/p>\n<p>\uff083\uff09<code>afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handle, Exception ex)<\/code>\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4e5f\u662f\u9700\u8981\u5f53\u524d\u5bf9\u5e94\u7684Interceptor\u00a0\u7684preHandle\u00a0\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u4e3atrue\u00a0\u65f6\u624d\u4f1a\u6267\u884c\u3002\u987e\u540d\u601d\u4e49\uff0c\u8be5\u65b9\u6cd5\u5c06\u5728\u6574\u4e2a\u8bf7\u6c42\u7ed3\u675f\u4e4b\u540e\uff0c\u4e5f\u5c31\u662f\u5728DispatcherServlet\u00a0\u6e32\u67d3\u4e86\u5bf9\u5e94\u7684\u89c6\u56fe\u4e4b\u540e\u6267\u884c\u3002\u8fd9\u4e2a\u65b9\u6cd5\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u7528\u4e8e\u8fdb\u884c\u8d44\u6e90\u6e05\u7406\u5de5\u4f5c\u7684\u3002<\/p>\n<h2>Interceptor\u5b9e\u73b0<\/h2>\n<p>\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528Interceptor\u5b9e\u73b0\u62e6\u622a\u529f\u80fd<\/p>\n<p>\uff081\uff09\u5b9a\u4e49Interceptor<\/p>\n<pre><code class=\"language-java\">@Component\npublic class LoginInterceptor implements HandlerInterceptor {\n    @Override\n    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)\n            throws Exception {\n        Object obj = request.getSession().getAttribute(MaydayConst.USER_SESSION_KEY);\n        \/\/ \u5982\u679cuser\u4e0d\u4e3a\u7a7a\u5219\u653e\u884c\n        if (null != obj) {\n            return true;\n        }\n        \/\/ \u5426\u5219\u62e6\u622a\u5e76\u8df3\u8f6c\u5230\u767b\u5f55\n        response.sendRedirect(&quot;\/admin\/login&quot;);\n        return false;\n    }\n\n    @Override\n    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,\n            ModelAndView modelAndView) throws Exception {\n    }\n\n    @Override\n    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)\n            throws Exception {\n    }\n}<\/code><\/pre>\n<p>\uff082\uff09\u6ce8\u518c\u62e6\u622a\u5668<\/p>\n<pre><code class=\"language-java\">@Configuration\npublic class WebMvcConfig implements WebMvcConfigurer {\n    @Autowired\n    private LoginInterceptor loginAuthenticator;\n\n    \/**\n     * \u6ce8\u518c\u62e6\u622a\u5668\n     *\/\n    @Override\n    public void addInterceptors(InterceptorRegistry registry) {\n        registry.addInterceptor(loginAuthenticator).addPathPatterns(&quot;\/admin\/**&quot;).excludePathPatterns(&quot;\/admin\/login&quot;)\n                .excludePathPatterns(&quot;\/admin\/getLogin&quot;);\/\/\u81ea\u5b9a\u4e49\u62e6\u622a\u7684url\u8def\u5f84\uff0c\n    }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Filter\u662f\u5bb9\u5668\uff08Tomcat\uff09\u7ea7\u522b\uff0cHandlerInterceptor\u662f\u5e94\u7528\u7ea7\u522b \u56e0\u4e3aFilter\u662f\u4f5c\u7528 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41],"tags":[352,351],"class_list":["post-1406","post","type-post","status-publish","format-standard","hentry","category-spring-boot","tag-352","tag-351"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1406","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1406"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1406\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}