{"id":26,"date":"2025-05-16T14:49:34","date_gmt":"2025-05-16T06:49:34","guid":{"rendered":"http:\/\/byname6.cn\/?p=26"},"modified":"2025-06-30T14:51:54","modified_gmt":"2025-06-30T06:51:54","slug":"tomcat%e6%ba%90%e7%a0%81%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"http:\/\/byname6.cn\/index.php\/2025\/05\/16\/tomcat%e6%ba%90%e7%a0%81%e5%88%86%e6%9e%90\/","title":{"rendered":"Tomcat\u6e90\u7801\u5206\u6790"},"content":{"rendered":"\n

\u8981\u5b8c\u6574\u8ddfTomcat\u53ef\u4ee5\u770b\u770bhttps:\/\/juejin.cn\/post\/7152446633194553374#heading-2<\/a>\u7cfb\u5217\uff0c\u8fd9\u7bc7\u6587\u7ae0\u5c31\u7c97\u7565\u5730\u4ecb\u7ecd\u4e00\u4e0b\u3002<\/p>\n\n\n\n

IDEA\u642d\u5efa\u8c03\u8bd5tomcat web\u6d41\u7a0b\uff1a<\/p>\n\n\n\n

1. <\/strong>\u5728Project Structure\/Modules<\/code><\/strong>\u4e2d\u589e\u52a0\u4e00\u4e2aIDEA\u7684\u81ea\u5e26web\u6a21\u5757\uff0c\u4f1a\u81ea\u52a8\u751f\u6210web\u5305\uff0c\u5e76\u9644\u5e26\u6807\u51c6\u7684\u6587\u4ef6\u7ed3\u6784\u3002<\/p>\n\n\n\n

2. <\/strong>\u4e8eweb\u5305\u6839\u76ee\u5f55\u4e0b\u7f16\u5199index.jsp\u6216\u5b8c\u6210web\u4ee3\u7801\u540e\uff0c\u5728Project Structure\/Artifacts<\/code><\/strong>\u91ccAdd\u4e00\u4e2aWeb Application:Exploded<\/code>\u6216\u8005Web Application: Archive<\/code>\uff0c\u5c06web\u5e94\u7528\u6253\u5305\u4ee5\u4fbf\u90e8\u7f72\u5728tomcat\u4e0a\uff0c\u4f1a\u5728out\u76ee\u5f55\u4e0b\u751f\u6210\u76f8\u5e94\u7684\u683c\u5f0f\uff1aExploded\u662f\u6587\u4ef6\u5939\u683c\u5f0f\uff0c\u65b9\u4fbf\u66f4\u6539\uff0c\u4e00\u822c\u8c03\u8bd5\u7684\u65f6\u5019\u9009\u7528\u8fd9\u4e2a\uff0c\u53ef\u4ee5\u76f4\u63a5\u5728out\u76ee\u5f55\u4e2d\u66f4\u6539\u4ee3\u7801\uff1bArchive\u5c31\u662fwar\u5305\uff0cweb\u4ee3\u7801\u7f16\u5199\u8c03\u8bd5\u6210\u529f\u540e\u5c31\u6253\u6210war\u5305\u4fbf\u4e8e\u4f20\u8f93\u5230\u670d\u52a1\u5668\u4e0a\u8fd0\u884c\u3002<\/p>\n\n\n\n

3. <\/strong>\u5728Run\/debug Configurations\u4e2dAdd\u4e00\u4e2aTomcat local(\u672c\u5730\u90e8\u7f72)\uff0c\u8f93\u5165URL\u7b49\u4fe1\u606f\uff0c\u518d\u5728Deployment\u4e2d\u9009\u62e9\u521a\u624d\u8f93\u51fa\u7684Artifact\uff0c\u542f\u52a8\u5373\u4f1a\u5728\u6307\u5b9aURL\u8fd0\u884cArtifact\u4e2d\u7684web\u670d\u52a1\u3002<\/p>\n\n\n\n

\u67b6\u6784<\/h1>\n\n\n\n

tomcat\u662f\u4e00\u4e2aJava web\u5bb9\u5668\uff0c\u7c7b\u4f3c\u4e8e\u670d\u52a1\u5668\uff0c\u80fd\u63d0\u4f9b\u4e00\u4e2a\u6216\u591a\u4e2aweb\u7684\u8fd0\u884c\u73af\u5883\u3002\u8fd0\u884ctomcat web\u9700\u8981tomcat\u4e0a\u90e8\u7f72web\u670d\u52a1\u7684war\u5305\u3002<\/p>\n\n\n\n

Tomcat\u7ed3\u6784\u6700\u5168\u7684\u4e00\u5f20\u56fe\uff1a<\/p>\n\n\n\n

\"image-20250525174350902\"\/<\/div><\/figure>\n\n\n\n

Tomcat\u4e09\u5927\u903b\u8f91\u7ec4\u4ef6<\/h2>\n\n\n\n

\u5bf9\u4e8eTomcat Server\u63d0\u4f9bweb\u670d\u52a1\u7684\u6d41\u7a0b\uff0c\u53ef\u4ee5\u7b80\u5355\u62bd\u8c61\u4e3a\u4e09\u5927\u7ec4\u4ef6\uff1aService\u3001Connector\u3001Container(\u56db\u79cd\u5b9e\u73b0\uff1aEngine\u3001Host\u3001Context\u3001Wrapper)<\/strong>\uff0c\u53ef\u4ee5\u7528\u4e00\u5f20\u56fe\u8868\u73b0\u5b83\u4eec\u4e4b\u95f4\u7684\u5173\u7cfb\uff1a<\/p>\n\n\n\n

\"image-20250525160222435\"\/<\/div><\/figure>\n\n\n\n

Server\u662fTomcat\u9876\u5c42\u7ed3\u6784\uff0c\u53ef\u4ee5\u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2aService\u3002<\/p>\n\n\n\n

Service<\/h3>\n\n\n\n

Service\uff1a<\/strong>\u8868\u793a\u670d\u52a1\uff0cServer\u53ef\u4ee5\u8fd0\u884c\u591a\u4e2a\u670d\u52a1\u3002\u6bd4\u5982\u4e00\u4e2aTomcat\u91cc\u9762\u53ef\u8fd0\u884c\u8ba2\u5355\u670d\u52a1\u3001\u652f\u4ed8\u670d\u52a1\u3001\u7528\u6237\u670d\u52a1\u7b49\u7b49\uff1bServer\u7684\u5b9e\u73b0\u7c7bStandardServer\u53ef\u4ee5\u5305\u542b\u4e00\u4e2a\u5230\u591a\u4e2aServices, Service\u7684\u5b9e\u73b0\u7c7b\u4e3aStandardService\u8c03\u7528\u4e86Servlet Engine(\u5f15\u64ce)\uff0c\u800c\u4e14StandardService\u7c7b\u4e2d\u4e5f\u6307\u660e\u4e86\u8be5Service\u5f52\u5c5e\u7684Server\u3002<\/p>\n\n\n\n

\u5176\u4e2d\u9ed8\u8ba4Service\u5c31\u662fCatalina<\/strong>\uff0cCatalina\u5176\u5b9e\u5c31\u662fTomcat\u7684\u524d\u8eab\uff0c\u63d0\u4f9b\u57fa\u7840\u7684web\u670d\u52a1\u3002<\/p>\n\n\n\n

Container<\/h3>\n\n\n\n

Engine\uff1a<\/strong>Container\u7684\u9876\u5c42\u7ed3\u6784\uff0c\u76f8\u5f53\u4e8e\u4e00\u4e2a\u63a5\u53e3\u80fd\u591f\u8c03\u63a7\u4ece\u5c5e\u7684Host\uff0c\u5e76\u751f\u6210\u65e5\u5fd7\u7b49\u3002\u4f1a\u914d\u7f6e\u4e00\u4e2a\u9ed8\u8ba4HOST\uff0c\u8bf7\u6c42\u7684host\u6ca1\u6709\u5339\u914d\u5230\u5408\u9002\u7684Host\u5c31\u4f1a\u4e22\u7ed9\u8fd9\u4e2a\u9ed8\u8ba4Host\u3002<\/p>\n\n\n\n

Host\uff1a<\/strong>\u865a\u62df\u4e3b\u673a\u3002\u6bcf\u4e2aHost\u91cc\u53ef\u8fd0\u884c\u591a\u4e2aHost\u3002<\/p>\n\n\n\n

Context\uff1a<\/strong>\u5728\u6e90\u7801\u7ed3\u6784\u91cc\u9762\u4f53\u73b0\u4e3a\u4e0d\u540c\u7684WebApps\u4e0b\u7684\u6bcf\u4e2a\u76ee\u5f55\u3002<\/p>\n\n\n\n

Wrapper:<\/strong> \u5bf9Servlet\u7684\u5c01\u88c5\uff0c\u4e00\u4e2aWrapper\u5373\u5bf9\u5e94\u4e00\u4e2aServlet\u5b9e\u4f8b\uff0c\u8d1f\u8d23\u5bf9Servlet\u88c5\u8f7d\u3001\u521d\u59cb\u5316\u3001\u6267\u884c\u4ee5\u53ca\u8d44\u6e90\u56de\u6536\u3002<\/p>\n\n\n\n

\u5728Tomcat\u4e2d\u63d0\u4f9b\u7684\u4e00\u5207\u7684\u670d\u52a1\u90fd\u662f\u5bf9\u5e94\u7740\u4e0d\u540c\u7684Servlet\uff0cServlet\u53ef\u4ee5\u8bf4\u662f\u6700\u91cd\u8981\u7684\u4e00\u4e2a”\u7ec4\u4ef6”\uff0c\u90a3\u4e48Servlet\u7684\u5177\u4f53\u5b9e\u73b0\u662f\u600e\u6837\u7684\u5462\uff1f<\/p>\n\n\n\n

Connector<\/h3>\n\n\n\n

Connector\u662f\u7528\u6765\u5904\u7406\u8bf7\u6c42\uff0c\u76d1\u542c\u5728\u67d0\u4e2a\u7aef\u53e3\uff0c\u7b49\u5f85\u8bf7\u6c42\u63a5\u5165\uff0c\u5c01\u88c5Request\u5bf9\u8c61\uff0c\u5206\u53d1\u5230Container\u3002<\/p>\n\n\n\n

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

Connector\u7684\u4e3b\u8981\u5b9e\u73b0\u662fProtocolHandler\u3002<\/p>\n\n\n\n

ProtocolHandler<\/code>\u5305\u542b\u4e09\u4e2a\u90e8\u4ef6\uff1aEndpoint<\/code>\u3001Processor<\/code>\u3001Adapter<\/code>\u3002<\/p>\n\n\n\n

    \n
  1. Endpoint<\/code>\u7528\u6765\u5904\u7406\u5e95\u5c42Socket\u7684\u7f51\u7edc\u8fde\u63a5\uff0cProcessor<\/code>\u7528\u4e8e\u5c06Endpoint<\/code>\u63a5\u6536\u5230\u7684Socket\u5c01\u88c5\u6210Request\uff0cAdapter<\/code>\u7528\u4e8e\u5c06Request\u4ea4\u7ed9Container\u8fdb\u884c\u5177\u4f53\u7684\u5904\u7406\u3002<\/li>\n\n\n\n
  2. Endpoint<\/code>\u7531\u4e8e\u662f\u5904\u7406\u5e95\u5c42\u7684Socket\u7f51\u7edc\u8fde\u63a5\uff0c\u56e0\u6b64Endpoint<\/code>\u662f\u7528\u6765\u5b9e\u73b0TCP\/IP\u534f\u8bae<\/code>\u7684\uff0c\u800cProcessor<\/code>\u7528\u6765\u5b9e\u73b0HTTP\u534f\u8bae<\/code>\u7684\uff0cAdapter<\/code>\u5c06\u8bf7\u6c42\u9002\u914d\u5230Servlet\u5bb9\u5668\u8fdb\u884c\u5177\u4f53\u7684\u5904\u7406\u3002<\/li>\n\n\n\n
  3. Endpoint<\/code>\u7684\u62bd\u8c61\u5b9e\u73b0\u7c7bAbstractEndpoint\u91cc\u9762\u5b9a\u4e49\u4e86Acceptor<\/code>\u548cAsyncTimeout<\/code>\u4e24\u4e2a\u5185\u90e8\u7c7b\u548c\u4e00\u4e2aHandler\u63a5\u53e3<\/code>\u3002Acceptor<\/code>\u7528\u4e8e\u76d1\u542c\u8bf7\u6c42\uff0cAsyncTimeout<\/code>\u7528\u4e8e\u68c0\u67e5\u5f02\u6b65Request\u7684\u8d85\u65f6\uff0cHandler<\/code>\u7528\u4e8e\u5904\u7406\u63a5\u6536\u5230\u7684Socket\uff0c\u5728\u5185\u90e8\u8c03\u7528Processor<\/code>\u8fdb\u884c\u5904\u7406\u3002<\/li>\n<\/ol>\n\n\n\n

    \u5177\u4f53\u7684\u5904\u7406\u6d41\u7a0b\u653e\u5728\u4e0b\u6587\u8bb2\u3002<\/p>\n\n\n\n

    JavaWeb\u4e09\u5927\u7ec4\u4ef6<\/h2>\n\n\n\n

    \u4e09\u8005\u7684\u52a0\u8f7d\u987a\u5e8f\u4e3aListener->Filter->Servlet<\/code><\/strong>\u3002<\/p>\n\n\n\n

    \u5728org.apache.catalina.core.StandardContext<\/code>\u7c7b\u7684startInternal()<\/code>\u65b9\u6cd5\u4e2d\uff0c\u9996\u5148\u8c03\u7528\u4e86listenerStart()<\/code>\uff0c\u63a5\u7740\u662ffilterStart()<\/code>\uff0c\u6700\u540e\u662floadOnStartup()<\/code>\u3002\u8fd9\u4e09\u5904\u8c03\u7528\u89e6\u53d1\u4e86Listener\u3001Filter\u3001Servlet\u7684\u6784\u9020\u52a0\u8f7d\u3002<\/p>\n\n\n\n

    Servlet<\/h3>\n\n\n\n

    Servlet<\/h4>\n\n\n\n

    \u4e00\u5207\u7684\u6838\u5fc3\u903b\u8f91\u548c\u670d\u52a1\u5b9e\u73b0\u90fd\u662fServlet\u5b9e\u73b0\u7684\u3002<\/p>\n\n\n\n

    Servlert\u7684\u6ce8\u518c\uff1a<\/p>\n\n\n\n

    \u6ce8\u91ca\uff1a<\/p>\n\n\n\n

    ...
    @WebServlet(\"\/hello\")
    public class MyServlet extends HttpServlet {
    ...
    }<\/pre>\n\n\n\n
    web.xml:<\/p>\n\n\n\n
      <servlet>
        <servlet-name>MyServlet<\/servlet-name>
        <servlet-class>Servlet.MyServlet<\/servlet-class>
        <load-on-startup>1<\/load-on-startup>
      <\/servlet>
      <servlet-mapping>
        <servlet-name>MyServlet<\/servlet-name>
        <url-pattern>\/hello<\/url-pattern>
      <\/servlet-mapping><\/pre>\n\n\n\n
    Servlet\u7684\u542f\u52a8\uff1a<\/strong>\u670d\u52a1\u5668\u542f\u52a8\u65f6(web.xml\u4e2d\u914d\u7f6eload-on-startup=1\uff0c\u9ed8\u8ba4\u4e3a0)\u6216\u8005\u7b2c\u4e00\u6b21\u8bf7\u6c42\u8be5servlet\u65f6\uff0c\u5c31\u4f1a\u521d\u59cb\u5316\u4e00\u4e2aServlet\u5bf9\u8c61\uff0c\u4e5f\u5c31\u662f\u4f1a\u6267\u884c\u521d\u59cb\u5316\u65b9\u6cd5init(ServletConfig conf)\u3002<\/p>\n\n\n\n
    Servlet\u662f\u7528\u6765\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u52a8\u6001\u8d44\u6e90\uff0c\u5f53Tomcat\u63a5\u6536\u5230\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u65f6\uff0c\u4f1a\u5c06\u5176\u89e3\u6790\u6210RequestServlet<\/code>\u5bf9\u8c61\u5e76\u53d1\u9001\u5230\u5bf9\u5e94\u7684Servlet\u4e0a\u8fdb\u884c\u5904\u7406\u3002<\/p>\n\n\n\n
    \u7f16\u5199\u4e00\u4e2aServlet\u7684\u5b9e\u73b0\u9700\u8981\u5b9e\u73b0Servlet\u63a5\u53e3\u7684\u4e94\u4e2a\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
    \"image-20250526143040810\"\/<\/div><\/figure>\n\n\n\n
    \u5b9e\u73b0\u4e86\u670d\u52a1\u903b\u8f91\u7684\u65b9\u6cd5\u662fServlet.service(\uff09<\/strong>\u3002<\/p>\n\n\n\n
    Tomcat\u4e3a\u5f00\u53d1\u8005\u5c01\u88c5\u4e86\u4e24\u79cd\u6807\u51c6Servlet\uff0c\u4ee5\u4fbf\u4e8e\u5b9e\u73b0Servlet\u53ea\u9700\u8981\u91cd\u5199\u6838\u5fc3\u903b\u8f91\u800c\u4e0d\u7528\u7e41\u7410\u5730\u5b9e\u73b0\u591a\u79cd\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
    GenericServlet\u3001HttpServlet\u3002<\/p>\n\n\n\n
    GenericServlet\u62bd\u8c61\u7c7b\u662f\u4e00\u4e2a\u901a\u7528\u7684Servlet\u7c7b\uff0c\u5bf9\u5176\u4ed6\u56db\u79cd\u65b9\u6cd5\u8fdb\u884c\u4e86\u7b80\u5355\u5b9e\u73b0\u3001\u53ea\u9700\u8981\u5f00\u53d1\u8005\u91cd\u5199Service\u3002<\/p>\n\n\n\n
    HttpServlet\u62bd\u8c61\u7c7b\u662fGenericServlet\u7684\u5b50\u7c7b\uff0c\u4e13\u95e8\u5904\u7406HTTP\u8bf7\u6c42\u3002\u5176Service\u65b9\u6cd5protected void service(HttpServletRequest req, HttpServletResponse resp)<\/code><\/strong>\u662f\u5bf9HTTP\u8bf7\u6c42\u7684\u6807\u51c6\u5904\u7406\uff0c\u5148\u89e3\u6790HTTP\u8bf7\u6c42\uff0c\u518d\u6839\u636e\u4e0d\u540c\u7684\u8bf7\u6c42\u65b9\u6cd5\u8c03\u7528\u5230doGet\u3001doPost\u3002\u5927\u90e8\u5206\u60c5\u51b5\u4e0b\u53ea\u9700\u8981\u91cd\u5199doGet\u7b49\u65b9\u6cd5\u5373\u53ef\u3002<\/p>\n\n\n\n
    ServletConfig<\/strong><\/h4>\n\n\n\n
    \u5c01\u88c5\u4e86Servlet\u7684\u7279\u6b8a\u4fe1\u606f\u5982\u7c7b\u540d\u7b49\u7b49\u3002\u5728Servler\u521d\u59cb\u5316\u7684\u65f6\u5019\u4e3a\u5176\u521b\u5efa\uff0c\u4e00\u4e2aServletConfig\u5bf9\u5e94\u4e00\u4e2aServlet\u3002<\/p>\n\n\n\n
    ServletContext<\/strong><\/h4>\n\n\n\n
    \u5f53\u4e00\u4e2aContext(Webapps\u76ee\u5f55)\u4e0b\u7684\u4e00\u4e2aServlet\u88ab\u542f\u52a8\uff0c\u4f1a\u6ce8\u518c\u4e00\u4e2aServletContext\u4f5c\u4e3a\u5f53\u524dContext\u6240\u6709Servlet\u7684\u5171\u4eab\u4e0a\u4e0b\u6587\u3002ServletContext\u53ef\u4ee5\u83b7\u53d6Web\u5e94\u7528\u4e2d\u7684\u5171\u4eab\u7684\u8d44\u6e90\uff0c\u6bd4\u5982web.xml\u7684\u521d\u59cb\u5316\u53c2\u6570\uff1a<\/p>\n\n\n\n
    <web-app>
      <display-name>Archetype Created Web Application<\/display-name>
      \/\/\u914d\u7f6e\u4e0a\u4e0b\u6587\u521d\u59cb\u5316\u53c2\u6570name
      <context-param>
        <param-name>name<\/param-name>
        <param-value>Feng<\/param-value>
      <\/context-param>
      <context-param>
        <param-name>age<\/param-name>
        <param-value>18<\/param-value>
      <\/context-param>
    <\/web-app><\/pre>\n\n\n\n
     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
            resp.setContentType(\"text\/html; charset=UTF-8\");
            PrintWriter writer = resp.getWriter();
     
            ServletContext servletContext = getServletContext();
     
            Enumeration<String> initParamerNames = servletContext.getInitParameterNames();
            while(initParamerNames.hasMoreElements()){
                String ParamerName = initParamerNames.nextElement();
                String Paramer = servletContext.getInitParameter(ParamerName);
                writer.write(ParamerName+\"\u7684\u503c\u4e3a\uff1a\"+Paramer+\"<br\/>\");
            }
     
            writer.close();
        }<\/pre>\n\n\n\n
    Filter<\/h3>\n\n\n\n
    Filter<\/h4>\n\n\n\n
    \u5de5\u4f5c\u6d41\u7a0b\uff1a<\/p>\n\n\n\n
    \"Filter<\/div><\/figure>\n\n\n\n
    \u4f1a\u628a\u6240\u6709\u7684Filter\u6ce8\u518c\u5230\u4e00\u4e2aFilterChain\u4e2d\uff0c\u7136\u540e\u5728\u8bf7\u6c42\u548c\u8fd4\u56de\u54cd\u5e94\u65f6\u94fe\u5f0f\u8c03\u7528Filter.doFilter()\u3002\u5176\u89e6\u53d1\u987a\u5e8f\uff1a<\/p>\n\n\n\n
    - \u57fa\u4e8e\u6ce8\u89e3\u914d\u7f6e\uff1a\u6309\u7167\u7c7b\u540d\u7684\u5b57\u7b26\u4e32\u6bd4\u8f83\u89c4\u5219\u6bd4\u8f83\uff0c\u503c\u5c0f\u7684\u5148\u6267\u884c
    - \u4f7f\u7528web.xml\u914d\u7f6e\uff1a\u6839\u636e\u5bf9\u5e94\u7684Mapping\u7684\u987a\u5e8f\u7ec4\u7ec7\uff0c\u8c01\u5b9a\u4e49\u5728\u4e0a\u8fb9\u8c01\u5c31\u5728\u524d<\/pre>\n\n\n\n
    FilterConfig<\/strong><\/h4>\n\n\n\n
    \u548cServlet\u7c7b\u4f3c\uff0c\u7531\u4e8eFilter\u4e5f\u6709\u53ef\u80fd\u8bbf\u95eeServlet\uff0c\u6240\u4ee5Servlet \u89c4\u8303\u5c06\u4ee3\u8868 ServletContext \u5bf9\u8c61\u548c Filter \u7684\u914d\u7f6e\u53c2\u6570\u4fe1\u606f\u90fd\u5c01\u88c5\u5230\u4e00\u4e2a\u79f0\u4e3a FilterConfig \u7684\u5bf9\u8c61\u4e2d\u3002<\/p>\n\n\n\n
    FilterConfig\u63a5\u53e3\u5219\u7528\u4e8e\u5b9a\u4e49FilterConfig\u5bf9\u8c61\u5e94\u8be5\u5bf9\u5916\u63d0\u4f9b\u7684\u65b9\u6cd5\uff0c\u4ee5\u4fbf\u5728 Filter\u7684doFilter()\u65b9\u6cd5\u4e2d\u53ef\u4ee5\u8c03\u7528\u8fd9\u4e9b\u65b9\u6cd5\u6765\u83b7\u53d6 ServletContext \u5bf9\u8c61\uff0c\u4ee5\u53ca\u83b7\u53d6\u5728 web.xml \u6587\u4ef6\u4e2d\u7684\u4e00\u4e9b\u521d\u59cb\u5316\u53c2\u6570\u3002<\/p>\n\n\n\n
    \"image-20250526153349442\"\/<\/div><\/figure>\n\n\n\n
    Listener<\/h3>\n\n\n\n
    Listener\u662f\u4e00\u4e2a\u5b9e\u73b0\u4e86\u7279\u5b9a\u63a5\u53e3\u7684Java\u7a0b\u5e8f\uff0c\u7528\u4e8e\u76d1\u542c\u4e00\u4e2a\u65b9\u6cd5\u6216\u8005\u5c5e\u6027\uff0c\u5f53\u88ab\u76d1\u542c\u7684\u65b9\u6cd5\u88ab\u8c03\u7528\u6216\u8005\u5c5e\u6027\u6539\u53d8\u65f6\uff0c\u5c31\u4f1a\u81ea\u52a8\u6267\u884c\u67d0\u4e2a\u65b9\u6cd5\u3002<\/p>\n\n\n\n
    \u4e0b\u9762\u6709\u51e0\u4e2a\u4e0eListener\u76f8\u5173\u7684\u6982\u5ff5<\/p>\n\n\n\n
      \n
    • \u4e8b\u4ef6\uff1a\u67d0\u4e2a\u65b9\u6cd5\u88ab\u8c03\u7528\uff0c\u6216\u8005\u5c5e\u6027\u7684\u6539\u53d8<\/li>\n\n\n\n
    • \u4e8b\u4ef6\u6e90\uff1a\u88ab\u76d1\u542c\u7684\u5bf9\u8c61\uff08\u5982ServletContext\u3001requset\u3001\u65b9\u6cd5\u7b49\uff09<\/li>\n\n\n\n
    • \u76d1\u542c\u5668\uff1a\u7528\u4e8e\u76d1\u542c\u4e8b\u4ef6\u6e90\uff0c\u5f53\u53d1\u751f\u4e8b\u4ef6\u65f6\u4f1a\u89e6\u53d1\u76d1\u542c\u5668<\/li>\n<\/ul>\n\n\n\n
      \u76d1\u542c\u5668\u6709\u7c7b\u4f3c\u51e0\u79cd\u63a5\u53e3\uff1a\u90fd\u7ee7\u627f\u81eaEventListener<\/strong><\/p>\n\n\n\n
      \u4e8b\u4ef6\u6e90<\/th>\u76d1\u542c\u5668<\/th>\u63cf\u8ff0<\/th><\/tr><\/thead>
      ServletContext<\/td>ServletContextListener<\/td>\u7528\u4e8e\u76d1\u542c ServletContext \u5bf9\u8c61\u7684\u521b\u5efa\u4e0e\u9500\u6bc1<\/td><\/tr>
      HttpSession<\/td>HttpSessionListener<\/td>\u7528\u4e8e\u76d1\u542c HttpSession \u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1<\/td><\/tr>
      ServletRequest<\/td>ServletRequestListener<\/td>\u7528\u4e8e\u76d1\u542c ServletRequest \u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1<\/td><\/tr>
      Livecycle<\/td>LivecycleListener<\/td>\u7528\u4e8e\u76d1\u542c\u751f\u547d\u5468\u671f\u4e8b\u4ef6\u7684\u53d1\u751f<\/td><\/tr>
      ServletContext<\/td>ServletContextAttributeListener<\/td>\u7528\u4e8e\u76d1\u542c ServletContext \u5bf9\u8c61\u7684\u5c5e\u6027\u65b0\u589e\u3001\u79fb\u9664\u548c\u66ff\u6362<\/td><\/tr>
      HttpSession<\/td>HttpSessionAttributeListener<\/td>\u7528\u4e8e\u76d1\u542c HttpSession \u5bf9\u8c61\u7684\u5c5e\u6027\u65b0\u589e\u3001\u79fb\u9664\u548c\u66ff\u6362<\/td><\/tr>
      ServletRequest<\/td>ServletRequestAttributeListener<\/td>\u7528\u4e8e\u76d1\u542c HttpServletRequest \u5bf9\u8c61\u7684\u5c5e\u6027\u65b0\u589e\u3001\u79fb\u9664\u548c\u66ff\u6362<\/td><\/tr>
      HttpSession<\/td>HttpSessionBindingListener<\/td>\u7528\u4e8e\u76d1\u542c JavaBean \u5bf9\u8c61\u7ed1\u5b9a\u5230 HttpSession \u5bf9\u8c61\u548c\u4ece HttpSession \u5bf9\u8c61\u89e3\u7ed1\u7684\u4e8b\u4ef6<\/td><\/tr>
      HttpSession<\/td>HttpSessionActivationListener<\/td>\u7528\u4e8e\u76d1\u542c HttpSession \u4e2d\u5bf9\u8c61\u6d3b\u5316\u548c\u949d\u5316\u7684\u8fc7\u7a0b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
      ServletContextListener\u4f7f\u7528\u793a\u4f8b<\/strong><\/p>\n\n\n\n
      \u4ee5ServletContextListener\u4e3a\u4f8b\uff0c\u521b\u5efa\u4e00\u4e2a\u7528\u4e8e\u76d1\u542cServletContext\u5bf9\u8c61\u7684Listener\uff0c\u4f7f\u7528\u6ce8\u89e3\u914d\u7f6e<\/p>\n\n\n\n
      package Listener;
       
      import javax.servlet.ServletContextEvent;
      import javax.servlet.ServletContextListener;
      import javax.servlet.annotation.WebListener;
       
      @WebListener
      public class Hello_Listener implements ServletContextListener {
       
          @Override
          public void contextInitialized(ServletContextEvent sce) {
              System.out.println(\"ServletContext\u5bf9\u8c61\u521b\u5efa\u4e86\uff01\");
          }
       
          @Override
          public void contextDestroyed(ServletContextEvent sce) {
              System.out.println(\"ServletContext\u5bf9\u8c61\u9500\u6bc1\u4e86\uff01\");
          } 
      }<\/pre>\n\n\n\n
      Pipeline-value<\/h2>\n\n\n\n
      tomcat\u5b9a\u4e49\u4e86Pipeline\uff08\u7ba1\u9053\uff09\u548cValue\uff08\u9600\uff09\u3002<\/p>\n\n\n\n
      Pipeline\u7684\u4e3b\u8981\u529f\u80fd\u662f\u7ef4\u62a4\u4e00\u4e2aValue\u94fe\u8868\uff0c\u94fe\u5f0f\u8c03\u7528\u8fd9\u4e2aValue\uff0cPipeline\u7684\u552f\u4e00\u5b9e\u73b0\u7c7b\u662fStandardPipeline\u3002\u5728ContainerBase\u4e2d\u4fbf\u5b9e\u4f8b\u5316\u4e86\u4e00\u4e2aStandardPipeline\uff0c\u800cTomcat\u7684\u51e0\u4e2a\u5bb9\u5668\u90fd\u662f\u7ee7\u627f\u4e86ContainerBase\uff0c\u5b9e\u9645\u4e0a\u5b83\u4eec\u4e5f\u90fd\u662f\u4f9d\u9760Pipeline\u7ba1\u9053\u6765\u5f00\u5c55\u8c03\u7528\u6267\u884c\u3002<\/p>\n\n\n\n
      Value\u7684\u6838\u5fc3\u903b\u8f91\u5b9e\u73b0\u5728invoke\u65b9\u6cd5\u4e2d\u3002ValueBase\u5b9e\u73b0\u4e86Container\u548cValue\u63a5\u53e3\uff0c\u662f\u4e00\u4e2a\u57fa\u7840\u62bd\u8c61\u7c7b\uff0c\u5176\u56db\u4e2a\u5b50\u7c7b\u5206\u522b\u662f\u56db\u79cd\u5bb9\u5668\u5bf9\u5e94\u7684\u72ec\u7279\u6807\u51c6Value\uff1a<\/p>\n\n\n\n
      \"image-20250528110310173\"\/<\/div><\/figure>\n\n\n\n
      \u4e0a\u9762\u8bf4\u4e86Pipeline\u7684\u5b9e\u4f8b\u5316\u90fd\u662f\u5728ContainerBase\u4e2d\u5b9e\u73b0\u7684\uff0c\u90a3\u4e48\u6bcf\u4e2a\u5bb9\u5668\u4e2d\u7684Value\u5462\uff1f<\/p>\n\n\n\n
      \u90fd\u662f\u5728\u5bb9\u5668\u65b9\u6cd5\u4e2d\u5b9e\u4f8b\u5316\u7684\uff0c\u5982StandardHost#startInternal\uff1b\u5982\u679c\u60f3\u81ea\u5b9a\u4e49\u4f7f\u7528\u4e5f\u53ef\u4ee5\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\uff0c\u8fd9\u662f\u89e3\u6790\u914d\u7f6e\u6587\u4ef6\u7684\u4ee3\u7801\uff1a<\/p>\n\n\n\n
      digester.addObjectCreate(prefix + \"Context\/Valve\",
                               null, \/\/ MUST be specified in the element
                               \"className\");
      digester.addSetProperties(prefix + \"Context\/Valve\");
      digester.addSetNext(prefix + \"Context\/Valve\",
                          \"addValve\",
                          \"org.apache.catalina.Valve\");<\/pre>\n\n\n\n
      \u5728\u6bcf\u4e2a\u5185\u7f6e\u7684Value\u5b9e\u73b0\u7c7b\u7684invoke\u65b9\u6cd5\u90fd\u4f1a\u94fe\u5f0f\u8c03\u7528\u4e0b\u4e00\u5c42value#invoke\uff0c\u5982\uff1a<\/p>\n\n\n\n
      StandardEngineValue#invoke:<\/p>\n\n\n\n
      host.getPipeline().getFirst().invoke(request, response);<\/pre>\n\n\n\n
      StandardHostValue#invoke:<\/p>\n\n\n\n
      context.getPipeline().getFirst().invoke(request, response);<\/pre>\n\n\n\n
      ……<\/p>\n\n\n\n
      \"image-20250528124823340\"\/<\/div><\/figure>\n\n\n\n
      \u8bf7\u6c42\u5305\u6700\u540e\u8d70\u5230StandardWrapperValve#invoke<\/code>\uff1a<\/strong><\/p>\n\n\n\n
      \u901a\u8fc7wrapper.allocate()\u65b9\u6cd5\uff0c\u521d\u59cb\u5316servlet\u3002<\/p>\n\n\n\n
      \u521b\u5efaApplicationFilterChain\uff0c\u8c03\u7528FilterChain\u7684doFilter\u65b9\u6cd5\uff0c\u5728\u6700\u540e\u4e00\u4e2aFilter\u65b9\u6cd5\u6267\u884c\u7ed3\u675f\u540e\uff0c\u4f1a\u8c03\u7528Servlet\u7684Service\u65b9\u6cd5\uff0c\u4ece\u800c\u5b9e\u73b0\u5bf9Servlet\u7684\u8c03\u7528\u3002<\/p>\n\n\n\n
      LifeStyle<\/h2>\n\n\n\n
      \u5728 Tomcat \u4e2d\uff0cServer\u3001Service\u3001\u5bb9\u5668\u53ca\u7ba1\u9053\u7b49\u7ec4\u4ef6\u90fd\u5177\u6709\u7edf\u4e00\u7684\u751f\u547d\u5468\u671f\uff1a\u521d\u59cb\u5316\uff08init\uff09\u3001\u542f\u52a8\uff08start\uff09\u3001\u505c\u6b62\uff08stop\uff09\u3001\u9500\u6bc1\uff08destroy\uff09<\/strong>\u3002<\/p>\n\n\n\n
      LifeCycle \u63a5\u53e3\u5c31\u662f\u5bf9\u8fd9\u4e9b\u751f\u547d\u5468\u671f\u64cd\u4f5c\u8fdb\u884c\u4e86\u62bd\u8c61\uff0c\u4fbf\u4e8e\u7ec4\u4ef6\u7684\u7edf\u4e00\u7f16\u5199\u548c\u8c03\u7528\u3002<\/p>\n\n\n\n
      \u6709\u4e86\u8fd9\u4e2a\u63a5\u53e3\uff0cTomcat \u7684\u751f\u547d\u5468\u671f\u8c03\u7528\u8def\u5f84\u4e5f\u66f4\u6e05\u6670\u3002\u4f8b\u5982\uff0c\u521d\u59cb\u5316\u8fc7\u7a0b\u4ece\u9876\u5c42 Server \u7684 init()<\/code> \u65b9\u6cd5\u5f00\u59cb\uff0c\u4f9d\u6b21\u94fe\u5f0f\u8c03\u7528\u5404\u5b50\u7ec4\u4ef6\u7684 init()<\/code>\u3002\u56e0\u6b64\uff0c\u53ea\u9700\u64cd\u4f5c\u9876\u5c42 Server\uff0c\u5373\u53ef\u5b8c\u6210\u6240\u6709\u7ec4\u4ef6\u7684\u751f\u547d\u5468\u671f\u7ba1\u7406\u3002<\/p>\n\n\n\n
      LifecycleBase<\/code><\/strong>\u662fLifecycle\u7684\u62bd\u8c61\u7c7b\uff0c\u4e5f\u662f\u88abContainer\u7ee7\u627f\u7684\u7c7b\uff1b\u5176init\u3001start\u7b49\u65b9\u6cd5\u5b9e\u9645\u4e0a\u662f\u53bb\u8c03\u7528\u5b9e\u73b0\u4e86\u7684xxxInternal<\/strong>\uff0c\u5982initInternal\u3001startInternal\u7b49\u3002<\/p>\n\n\n\n
      \u5728\u8fd9\u79cd\u64cd\u4f5c\u6a21\u5f0f\u4e0b\uff0c\u4e5f\u4f1a\u5f15\u5165\u4e00\u4e9b\u65b0\u7684\u60c5\u666f\uff1a\u5982\u5e76\u975e\u6240\u6709\u7ec4\u4ef6\u90fd\u5728\u521d\u59cb\u5316\u9636\u6bb5\u7acb\u5373\u52a0\u8f7d\uff0c\u50cf\u662fServlet\uff0c\u53ef\u80fd\u5728\u9996\u6b21\u8bf7\u6c42\u65f6\u624d\u521d\u59cb\u5316\u3002\u5728\u5904\u7406\u8bf7\u6c42\u7684\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u4e4b\u524d\u521d\u59cb\u5316\u7684\u7ec4\u4ef6\u4e0d\u518d\u9700\u8981\u518d\u521d\u59cb\u5316\u4e86\u3002\u4e3a\u4e86\u652f\u6301\u6309\u9700\u52a0\u8f7d\uff0cTomcat \u5f15\u5165\u4e86\u72b6\u6001\u673a\u6a21\u5f0f<\/strong>\u6765\u7cbe\u7ec6\u7ba1\u7406\u7ec4\u4ef6\u72b6\u6001\u3002<\/p>\n\n\n\n
      \u5982\uff1a<\/p>\n\n\n\n
      \u5f53\u7ec4\u4ef6\u5728STARTING_PREP\u3001STARTING\u6216STARTED\u65f6\uff0c\u8c03\u7528start()\u65b9\u6cd5\u6ca1\u6709\u4efb\u4f55\u6548\u679c
      \u5f53\u7ec4\u4ef6\u5728NEW\u72b6\u6001\u65f6\uff0c\u8c03\u7528start()\u65b9\u6cd5\u4f1a\u5bfc\u81f4init()\u65b9\u6cd5\u88ab\u7acb\u523b\u6267\u884c\uff0c\u968f\u540estart()\u65b9\u6cd5\u88ab\u6267\u884c
      \u5f53\u7ec4\u4ef6\u5728STOPPING_PREP\u3001STOPPING\u6216STOPPED\u65f6\uff0c\u8c03\u7528stop()\u65b9\u6cd5\u6ca1\u6709\u4efb\u4f55\u6548\u679c
      \u5f53\u4e00\u4e2a\u7ec4\u4ef6\u5728NEW\u72b6\u6001\u65f6\uff0c\u8c03\u7528stop()\u65b9\u6cd5\u4f1a\u5c06\u7ec4\u4ef6\u72b6\u6001\u53d8\u66f4\u4e3aSTOPPED\uff0c\u6bd4\u8f83\u5178\u578b\u7684\u573a\u666f\u5c31\u662f\u7ec4\u4ef6\u542f\u52a8\u5931\u8d25\uff0c\u5176\u5b50\u7ec4\u4ef6\u8fd8\u6ca1\u6709\u542f\u52a8\u3002\u5f53\u4e00\u4e2a\u7ec4\u4ef6\u505c\u6b62\u7684\u65f6\u5019\uff0c\u5b83\u5c06\u5c1d\u8bd5\u505c\u6b62\u5b83\u4e0b\u9762\u7684\u6240\u6709\u5b50\u7ec4\u4ef6\uff0c\u5373\u4f7f\u5b50\u7ec4\u4ef6\u8fd8\u6ca1\u6709\u542f\u52a8<\/pre>\n\n\n\n
      \u5bf9\u4e8e\u6bcf\u4e2a\u4e8b\u4ef6\u4e5f\u5f15\u5165\u4e86\u76d1\u542c\u673a\u5236\uff0c\u4f1a\u90e8\u7f72Listener\u76d1\u542cLifeStyle\uff0c\u5728\u4ee3\u7801\u4e2d\u4f53\u73b0\u4e3a\u5982setState(LifecycleState.STARTING)<\/code>\uff1b\u6709\u52a9\u4e8e\u5bf9\u529f\u80fd\u7684\u4fee\u6539\u548c\u589e\u52a0\u3002<\/p>\n\n\n\n
      Tomcat\u67b6\u6784\u7684\u7c7b\u4f9d\u8d56<\/h2>\n\n\n\n
      Tomcat\u6574\u4e2a\u67b6\u6784\u7684\u7c7b\u3001\u4f9d\u8d56\uff1a<\/p>\n\n\n\n
      \"image-20250526220432076\"\/<\/div><\/figure>\n\n\n\n
      \u4ee3\u7801\u89e3\u6790<\/h1>\n\n\n\n
      Tomcat\u670d\u52a1\u521d\u59cb\u5316\u548c\u542f\u52a8<\/h2>\n\n\n\n
      LifeStyle\u7ec4\u4ef6\u521d\u59cb\u5316\u3001\u542f\u52a8<\/h3>\n\n\n\n
      \u4e0a\u9762\u77e5\u9053\uff0c\u6240\u6709\u7684Service\uff0cContainer\uff0cConnector\u7ec4\u4ef6\u90fd\u662fLifeStyle\u63a5\u53e3\u5b9e\u73b0\uff0c\u6240\u4ee5\u5176\u521d\u59cb\u5316\u3001\u542f\u52a8\u90fd\u662f\u94fe\u5f0f\u8c03\u7528xxx.init()\uff0cxxx.start()\u3002<\/p>\n\n\n\n
      startup.sh\u8c03\u7528\u4e86Bootstra#main<\/code><\/strong>\u3002Bootstra#main<\/code><\/strong>\u4e2d\u5148\u8c03\u7528init\u65b9\u6cd5\uff0c\u521b\u5efa\u4e00\u4e9b\u7c7b\u52a0\u8f7d\u5668\uff0c\u4ee5\u53ca\u5b9e\u4f8b\u5316org.apache.catalina.startup.Catalina<\/code><\/strong>\u5230deamon\u6210\u5458\u53d8\u91cf\u4e2d\uff1b\u968f\u540e\u63a5\u53d7\u5230.sh\u4e2d\u7684start\u53c2\u6570\uff0c\u53cd\u5c04\u8c03\u7528Catalina\u7684load\u548cstart\u65b9\u6cd5<\/strong>\u542f\u52a8\u3002<\/p>\n\n\n\n
      Catalina#load<\/code><\/strong>\u5148\u901a\u8fc7parseServerXml<\/code>\u89e3\u6790server.xml\uff0c\u5b9e\u4f8b\u5316\u5176\u4e2d\u7684\u7ec4\u4ef6\u5e76\u6ce8\u518c\u5230Catalina\u4e2d\uff0c\u5e76\u8c03\u7528getServer().init()<\/code>\uff0c\u5373\u5982\u4e0a\u6587\u6240\u8bf4\u4eceCatalina#init\u521d\u59cb\u5316Catalina\u53ca\u5176\u5b50\u90e8\u4ef6\u3002Catalina#start<\/code><\/strong>\u4e5f\u662f\u8c03\u7528getServer().start()<\/code>\uff0c\u542f\u52a8\u5bf9\u6240\u6709\u7ec4\u4ef6\u7684\u521d\u59cb\u5316\u3002\u5176\u4e2dHost\u53ca\u5176\u4e0b\u7ea7\u7ec4\u4ef6\u7684\u521d\u59cb\u5316\u3001\u5b9e\u4f8b\u5316\u548c\u542f\u52a8\u6bd4\u8f83\u7279\u6b8a\uff0c\u5e76\u6ca1\u6709\u5728Engine\u7684\u521d\u59cb\u5316\u65b9\u6cd5\u4e2d\u5b8c\u6210Host\u53ca\u4e0b\u7ea7\u7ec4\u4ef6\u7684\u521d\u59cb\u5316\u3002<\/strong>\u5177\u4f53\u7684\u5b9e\u73b0\u4e5f\u662fTomcat\u652f\u6301\u70ed\u90e8\u7f72Webapp\u7684\u539f\u56e0\uff0c\u7a0d\u540e\u5373\u8ba8\u8bba\u5230\u3002<\/p>\n\n\n\n
      StandardServer#initInternal<\/code> -> StandardService#initInternal<\/code> -> StandardEngine#initInternal<\/code> -> super.initInternal()<\/code>(ContainerBase#initInternal)<\/strong><\/p>\n\n\n\n
      StandardServer#startInternal<\/code> -> StandardService#startInternal<\/code> -> StandardEngine#startInternal<\/code> -> super.initStart()<\/code>(ContainerBase#startInternal)<\/strong><\/p>\n\n\n\n
      \u5728Engine\u4ee5\u4e0a\u7684\u4e0a\u5c42\u7ec4\u4ef6\u4e2d\uff0c\u521d\u59cb\u5316\u6216\u8005\u542f\u52a8\u65f6\u90fd\u4e3a\u4e0b\u5c42\u7ec4\u4ef6\u8fdb\u884c\u4e86\u521d\u59cb\u5316\u64cd\u4f5c<\/p>\n\n\n\n
      \u5982StandardServer#initInternal<\/code>\uff1a<\/p>\n\n\n\n
          for (Service service : services) {
              service.init();
          }<\/pre>\n\n\n\n
      \u800cStandardEngine\u5374\u76f4\u63a5\u8c03\u7528\u7236\u7c7b\u7684\u65b9\u6cd5\u4e86\uff0c\u800c\u8fd9\u4e00\u6b65\u5176\u5b9e\u4ec0\u4e48\u4e5f\u6ca1\u5e72\u3002\u5b9e\u9645\u4e0aHOST\u662f\u5728StandardHost#start\u4e2d\u5148\u521d\u59cb\u5316\u518d\u542f\u52a8\u7684\u3002\u56e0\u4e3a\u9700\u8981\u8003\u8651\u6548\u7387\u95ee\u9898\uff0c\u4e00\u4e2aEngine\u53ef\u80fd\u5bf9\u5e94\u7740\u591a\u4e2a\u4e0d\u540cHOST\u57df\u540d\u4e0b\u7684\u670d\u52a1\uff0c\u5982\u679c\u4e00\u952e\u521d\u59cb\u5316\u4f1a\u8017\u8d39\u5f88\u957f\u65f6\u95f4\uff0c\u6240\u4ee5\u9700\u8981\u5c06\u521d\u59cb\u5316\u7559\u5728\u5404\u4e2aHost\u4e2d\u81ea\u5df1\u6267\u884c\u3002<\/strong>\u540c\u6837\uff0cStandardHost\u548cStandardEngine\u4e00\u6837\u4e5f\u6ca1\u6709\u521d\u59cb\u5316Context\uff0c\u521d\u59cb\u5316\u540c\u6837\u653e\u5728\u4e86Context#start\u4e2d\u3002<\/p>\n\n\n\n
      ContainerBase#startInternal<\/code><\/strong> \u4f1a\u8c03\u7528\u5b50\u5bb9\u5668\u7684start\u65b9\u6cd5\uff0c\u8fd9\u91cc\u4fbf\u662fStandardHost#start<\/code><\/strong>\u4e86\uff0c\u4e0d\u4f1a\u8c03\u7528StandardHost#init<\/code><\/strong>\u4e86<\/p>\n\n\n\n
      \u540c\u6837\u5730\uff0cStandardHost#start\u53c8\u4f1a\u53bb\u8c03\u7528super.initStart()\u4e5f\u5c31\u662fContainerBase#startInternal<\/code>\uff0c\u8c03\u7528\u5b50\u5bb9\u5668Context\u7684start\u65b9\u6cd5\u3002<\/p>\n\n\n\n
      \u8fd9\u91cc\u4fbf\u6709\u4e00\u4e2a\u95ee\u9898\uff1a\u5728Server.xml\u4e2d\u662f\u4e0d\u4f1a\u5199Context\u7684\u914d\u7f6e\u7684\uff0c\u8fd9\u4e2aContext\u662f\u54ea\u91cc\u5b9e\u4f8b\u5316\u7684\uff1f<\/p>\n\n\n\n
      \u5176\u5b9e\uff0c\u5728ParseServerXml\u4e2d\u9664\u4e86\u89e3\u6790\u914d\u7f6e\u6587\u4ef6\uff0c\u8fd8\u4f1a\u4e3aEngine\u3001Host\u914d\u7f6e\u751f\u547d\u5468\u671f\u76d1\u542c\u5668EngineConfig\u548cHostConfig<\/strong>\u3002<\/p>\n\n\n\n
      \u5e76\u4e0d\u9700\u8981\u5728server.xml\u4e2d\u914d\u7f6eContext\uff0c\u800c\u662f\u5728ParseServerXml\u4e2d\u7531HostConfig\u81ea\u52a8\u626b\u63cf\u90e8\u7f72\u76ee\u5f55\uff0c\u4ee5context.xml\u6587\u4ef6\u4e3a\u57fa\u7840\u8fdb\u884c\u89e3\u6790\u521b\u5efa\uff08\u5982\u679c\u901a\u8fc7IDE\u542f\u52a8Tomcat\u5e76\u90e8\u7f72\u5e94\u7528\uff0c\u5176Context\u914d\u7f6e\u5c06\u4f1a\u88ab\u52a8\u6001\u66f4\u65b0\u5230server.xml\u4e2d\uff09\u3002<\/p>\n\n\n\n
      \u540e\u7eed\u7684start\/init\u6d41\u7a0b\u7740\u91cd\u8bb2\u4e00\u4e0b\u5173\u4e8eServlet\/Linster\u7684\u6ce8\u518c\uff1a<\/p>\n\n\n\n
      Servlet\/Linster\u7684\u6ce8\u518c<\/h3>\n\n\n\n
      StandardContext#startInternal()<\/code><\/strong>\u4e2d\uff0c\u89e3\u6790xml\u540e\u4f9d\u6b21\u5bf9Listener\u3001Filter\u3001Servler\u52a0\u8f7d\uff0c\u5176\u4e2d\u521b\u5efaWrapper\u7684\u5173\u952e\u65b9\u6cd5\u662fconfigureContext(webXml)<\/strong>\uff0c<\/p>\n\n\n\n
       private void configureContext(WebXml webxml) {
              \/\/ As far as possible, process in alphabetical order so it is easy to
              \/\/ check everything is present
              \/\/ Some validation depends on correct public ID
              context.setPublicId(webxml.getPublicId());
      ...   \/\/\u8bbe\u7f6eStandardContext\u53c2\u6570       
              for (ServletDef servlet : webxml.getServlets().values()) {
                  \/\/\u521b\u5efaStandardWrapper\u5bf9\u8c61
                  Wrapper wrapper = context.createWrapper();
                  if (servlet.getLoadOnStartup() != null) {
       
                      \/\/\u8bbe\u7f6eLoadOnStartup\u5c5e\u6027
                      wrapper.setLoadOnStartup(servlet.getLoadOnStartup().intValue());
                  }
                  if (servlet.getEnabled() != null) {
                      wrapper.setEnabled(servlet.getEnabled().booleanValue());
                  }
       
                  \/\/\u8bbe\u7f6eServletName\u5c5e\u6027
                  wrapper.setName(servlet.getServletName());
                  Map<String,String> params = servlet.getParameterMap();
                  for (Entry<String, String> entry : params.entrySet()) {
                      wrapper.addInitParameter(entry.getKey(), entry.getValue());
                  }
                  wrapper.setRunAs(servlet.getRunAs());
                  Set<SecurityRoleRef> roleRefs = servlet.getSecurityRoleRefs();
                  for (SecurityRoleRef roleRef : roleRefs) {
                      wrapper.addSecurityReference(
                              roleRef.getName(), roleRef.getLink());
                  }
       
                  \/\/\u8bbe\u7f6eServletClass\u5c5e\u6027
                  wrapper.setServletClass(servlet.getServletClass());
                  ...
                  wrapper.setOverridable(servlet.isOverridable());
                  \/\/\u5c06\u5305\u88c5\u597d\u7684StandWrapper\u6dfb\u52a0\u8fdbContainerBase\u7684children\u5c5e\u6027\u4e2d
                  context.addChild(wrapper);
                 for (Entry<String, String> entry :
                      webxml.getServletMappings().entrySet()) {
                  \/\/\u6dfb\u52a0\u8def\u5f84\u6620\u5c04
                  context.addServletMappingDecoded(entry.getKey(), entry.getValue());
              }
              }
              ...
          }<\/pre>\n\n\n\n
      \u8c03\u7528StandradContext.createWrapper\u521b\u5efa\u4e00\u4e2aWrapper\uff0c\u7136\u540e\u5c06LoadOnStartup\u3001ServletName\u3001ServletClass\u5c5e\u6027\u8bbe\u7f6e\u8fdb\u53bb\uff0c\u6700\u540e\u6dfb\u52a0\u8fdbContainerBase\u7684children\u5c5e\u6027\u3002<\/p>\n\n\n\n
      \u63a5\u7740\u5728StandardContext#startInternal<\/code>\u65b9\u6cd5\u901a\u8fc7findChildren()<\/code>\u83b7\u53d6StandardWrapper<\/code>\u7c7b<\/p>\n\n\n\n
      \u6700\u540e\u4f9d\u6b21\u52a0\u8f7d\u5b8cListener\u3001Filter\u540e\uff0c\u5c31\u901a\u8fc7loadOnStartUp()<\/code>\u65b9\u6cd5\u52a0\u8f7dwrapper\uff0c\u4f1a\u5bf9Wrapper\u5bf9\u8c61\u4e2dloadOnStartup<\/code>\u5c5e\u6027\u7684\u503c\u8fdb\u884c\u5224\u65ad\uff0c\u53ea\u6709\u5927\u4e8e0\u7684\u624d\u4f1a\u88ab\u653e\u5165list\u8fdb\u884c\u540e\u7eed\u7684wrapper.load()<\/code>\u52a0\u8f7d\u8c03\u7528\u3002<\/p>\n\n\n\n
      \u8fd9\u91cc\u5bf9\u5e94\u7684\u5b9e\u9645\u4e0a\u5c31\u662fTomcat Servlet\u7684\u61d2\u52a0\u8f7d\u673a\u5236\uff0c\u53ef\u4ee5\u901a\u8fc7loadOnStartup<\/code>\u5c5e\u6027\u503c\u6765\u8bbe\u7f6e\u6bcf\u4e2aServlet\u7684\u542f\u52a8\u987a\u5e8f\u3002\u9ed8\u8ba4\u503c\u4e3a-1\uff0c\u53ea\u6709\u5f53Servlet\u88ab\u8c03\u7528\u65f6\u624d\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u3002<\/p>\n\n\n\n
      Connector\u7684\u542f\u52a8\u3001\u521d\u59cb\u5316<\/h3>\n\n\n\n
      \u8fd9\u91cc\u8fd8\u503c\u5f97\u4e00\u63d0\u7684\u662fConnector\u7ec4\u4ef6\u7684\u542f\u52a8\u548c\u59cb\u5316\uff0c\u8fd9\u91ccConnector\u662f\u4f5c\u4e3aService\u7684\u4e00\u4e2a\u7ec4\u4ef6\uff0c\u548c\u5176\u5b83\u4e00\u5e76\u8fdb\u884c\u521d\u59cb\u5316\u548c\u542f\u52a8\u7684\uff1a<\/p>\n\n\n\n
      Service.init()<\/strong><\/p>\n\n\n\n
      connector.init();<\/pre>\n\n\n\n
      Service.start()<\/strong><\/p>\n\n\n\n
      connector.start();<\/pre>\n\n\n\n
      \u8fd9\u5176\u4e2d\u5177\u4f53\u7684\u4ee3\u7801\u5b9e\u73b0\u5c31\u4e0d\u5177\u4f53\u8bf4\u660e\u4e86\uff0c\u6700\u7ec8\u4f1a\u6267\u884cserverSock.socket().bind(addr,getAcceptCount());<\/code><\/strong>\u8fdb\u884c\u7ed1\u5b9a\u7aef\u53e3\u548c\u76d1\u542c\uff0c\u5e76\u5f00\u542f\u4e00\u4e2aPoller\u7684\u5957\u63a5\u5b57\u7ebf\u7a0b\u3002<\/p>\n\n\n\n
      Tomcat\u5904\u7406\u8bf7\u6c42<\/h2>\n\n\n\n
      \u8bf7\u6c42\u63a5\u5165\u5230Connecot\u5f00\u542f\u7684Poller\u7ebf\u7a0b\u540e\uff0c\u6700\u540e\u8d70\u5165Http11Processor#service<\/code><\/strong>\uff08http\u534f\u8bae\u662fHttp11Processor\u7c7b\uff0c\u5176\u5b83\u534f\u8bae\u6839\u636e\u914d\u7f6e\u5b9e\u73b0\uff09\u3002<\/p>\n\n\n\n
      \u5176\u4e2d\u4f1a\u6267\u884c\u4e00\u4e2a\u5173\u952e\u7684\u65b9\u6cd5\u662fprepareRequest()<\/strong>\uff0c\u5bf9\u8bf7\u6c42url\u8fdb\u884c\u5904\u7406\uff0c\u6700\u7ec8\u5bf9Request\u5bf9\u8c61\u5b8c\u6210\u6700\u540e\u7684\u5305\u88c5\uff0c\u8fd9\u4e2a\u5bf9\u4e8e\u6211\u4eec\u5b66\u5b89\u5168\u7684\u4f1a\u91cd\u8981\u4e00\u70b9\u3002<\/p>\n\n\n\n
      Http11Processor#prepareRequest<\/h3>\n\n\n\n
      \u8fd9\u4e2a\u65b9\u6cd5\u5e72\u4e86\u4e24\u4ef6\u4e8b\uff1a1. \u5224\u65ad\u8bf7\u6c42\u884curl\u8def\u5f84\uff0c\u5982\u679c\u4e3a\u7edd\u5bf9\u8def\u5f84\u8f6c\u5316\u4e3a\u76f8\u5bf9\u8def\u5f84 2.\u5224\u65ad\u662f\u5426\u5b58\u5728”\u8fdd\u89c4\u5b57\u7b26”<\/p>\n\n\n\n
      \u7b2c\u4e00\u4ef6\u4e8b\u662f\u4ec0\u4e48\u610f\u601d\u5462\uff1f\u6709\u4e9b\u8bf7\u6c42\u5305\u53ef\u80fd\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n
      GET http:\/\/localhost\/aaa\/test HTTP\/1.1
      Host: localhost
      User-Agent: curl\/8.2.1
      Accept: *\/*
      Connection: close<\/pre>\n\n\n\n
      \u8fd9\u79cd\u60c5\u51b5\u5c31\u8981\u8f6c\u5316\u4e3a\/aaa\/test\u3002<\/p>\n\n\n\n
      \u7b2c\u4e8c\u4ef6\u4e8b\u5bf9\u4e8e\u5b89\u5168\u6765\u8bf4\u5c31\u76f8\u5bf9\u91cd\u8981\u4e86\uff1a\u4f1a\u5bf9\u5c01\u88c5\u597d\u7684\u76f8\u5bf9\u8def\u5f84uriBC\u8c03\u7528\uff1a<\/p>\n\n\n\n
        for (int i = uriBC.getStart(); i < uriBC.getEnd(); i++) {
                  if (!httpParser.isAbsolutePathRelaxed(uriB[i])) {
                      badRequest(\"http11processor.request.invalidUri\");
                      break;
                  }
              }<\/pre>\n\n\n\n
      HttpParser#isAbsolutePathRelaxed<\/code>:<\/p>\n\n\n\n
        public boolean isAbsolutePathRelaxed(int c) {
              \/\/ Fast for valid user info characters, slower for some incorrect
              \/\/ ones
              try {
                  return IS_ABSOLUTEPATH_RELAXED[c];
              } catch (ArrayIndexOutOfBoundsException ex) {
                  return false;
              }
          }<\/pre>\n\n\n\n
      \u8fd9\u4e2aIS_ABSOLUTEPATH_RELAXED\u662f\u4e00\u4e2a\u5e03\u5c14\u6570\u7ec4\uff0c\u5bf9\u6bcf\u4e2aascii\u5b57\u7b26\u5c01\u88c5\u4e86\u76f8\u5e94\u7684true false\uff0c\u4ece\u6574\u4f53\u903b\u8f91\u4e0a\u6765\u770b\uff0c\u5982\u679c\u4e3afalse\u5219\u4f1a\u8fd4\u56dehttp 400\u62a5\u9519\u3002\u8fd9\u91cc\u603b\u7ed3\u4e86\u4e00\u4e0b\u5728tomact URL\u4e2d\u5141\u8bb8\u6216\u8005\u4e0d\u5141\u8bb8\u7684\u5b57\u7b26<\/strong>\uff1a<\/p>\n\n\n\n
      0\u201331\u3001127 \u662f\u6240\u6709 C0 \u63a7\u5236\u5b57\u7b26\uff0c false
      \u200b
      ! \" # $ < > [ \\ ] ^ \\ { | } ~ \u3002false
      \u200b
      \u6240\u6709\u5b57\u6bcd\u3001\u6570\u5b57\uff0c\u4ee5\u53ca - . \/ : = ? @ _ \u5b57\u7b26\u90fd\u4e3a true<\/code><\/pre>\n\n\n\n
      Adapter#service<\/h3>\n\n\n\n
      \u5bf9\u8bf7\u6c42\u8fdb\u884c\u9884\u5904\u7406\u83b7\u5f97\u4e00\u4e2a\u5b8c\u6574\u7684Request\u5bf9\u8c61\uff0c\u63a5\u7740\u4f1a\u8c03\u7528<\/p>\n\n\n\n
      this.getAdapter().service<\/pre>\n\n\n\n
      -><\/p>\n\n\n\n
      this.connector.getService().getContainer().getPipeline().getFirst().invoke(request, response);<\/pre>\n\n\n\n
      \u7531\u6b64\u5f00\u59cb\u4e86Pipline-value\u94fe\u7684\u6267\u884c\u3002<\/p>\n\n\n\n
      StandardEngineValue#invoke<\/code> -> StandardHostValue#invoke<\/code> -> StandardContextValue#invoke<\/code> -> StandardWrapperValue#invoke<\/code><\/p>\n\n\n\n
      \u4ee5http:\/\/localhost\/admin\/login<\/a>\u4e3a\u4f8b<\/p>\n\n\n\n
      StandardEngineValue#invoke<\/code> \uff1a\u4f1a\u4eceRequest\u5bf9\u8c61\u4e2d\u53d6\u51fa\u8bbf\u95ee\u7684host\uff08localhost\uff09\uff0c\u5982\u679c\u5224\u65ad\u4e0d\u5b58\u5728\uff0c\u8bbe\u7f6e404\u8fd4\u56de\u5305\u3002<\/p>\n\n\n\n
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