关于Servlet的生命周期

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关于Servlet的生命周期

以下我们写一个一个html,和一个简单的Servlet,然后在html页面上以dopost方式来提交表单来访问Servlet的dopost函数,然后分析Servlet的生命周期

这个工程的名字: TestLifeCyecleServlet

index.html:

action="LifeCycleServlet"

所以这个表单提交的目标是: http://localhost:8080/TestLifeCyecleServlet/LifeCycleServlet

再看看我们的Servlet: LifeCycleServlet

LifeCycleServlet.java:

package myServlet;
 
import java.io.IOException;
 
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
public class LifeCycleServlet extends HttpServlet {
        
         /**
          *
          */
         privatestatic final long serialVersionUID = 1L;
 
         publicLifeCycleServlet() {
                   //TODO Auto-generated constructor stub
                   System.out.println("Constructor......");
         }
        
         @Override
         protectedvoid doPost(HttpServletRequest req, HttpServletResponse resp)
                            throwsServletException, IOException {
                   //TODO Auto-generated method stub
                   System.out.println("doPost;");
         }
 
         @Override
         publicvoid destroy() {
                   //TODO Auto-generated method stub
                   System.out.println("detroy");
         }
 
         @Override
         publicvoid init() throws ServletException {
                   //TODO Auto-generated method stub
                   System.out.println("init()");
         }
        
         @Override
         publicvoid init(ServletConfig config) throws ServletException {
                   //TODO Auto-generated method stub
                   System.out.println("init(config)");
                  
                   super.init(config);
        
         }
}

我们要用Servlet,一般都要在web.xml里配置的:

表示这个LifeCycleServlet的访问地址为: http://localhost:8080/TestLifeCyecleServlet/LifeCycleServlet

主页面:index.html