jsp提交登陆信息,servlet返回一个html页面(不做验证,无数据库)

2016/01/26 18:18
阅读数 1.4K

1. 结构

            ServletDemo02----JavaResources---src---LoginServlet.java

                                         ----WebContent---WEB-INF---web.xml

                                         ----WebContent---index.html

2.LoginServlet.java

import java.io.*;  
import javax.servlet.*;  
import javax.servlet.http.*;  
  
public class LoginServlet extends HttpServlet {  
    //重写doGet方法  
    public void doGet(HttpServletRequest request,  HttpServletResponse response)  throws ServletException,  IOException {  
        String username = request.getParameter("username");     
        String password = request.getParameter("password");        
          
        //服务器端打印信息  
        //System.out.println("username=" + username);  
        //System.out.println("password=" + password);  
        //设置编码格式  
        response.setContentType("text/html;charset=GB18030");  
          
        //返回html页面  
        response.getWriter().println("<html>");  
        response.getWriter().println("<head>");     
        response.getWriter().println("<title>登录信息</title>");      
        response.getWriter().println("</head>");    
        response.getWriter().println("<body>");     
        response.getWriter().println("欢迎【" + username + "】用户登录成功!!!");    
        response.getWriter().println("</body>");    
        response.getWriter().println("</html>");  
        }                     
    //重写doPost方法  
    public void doPost(HttpServletRequest request,  HttpServletResponse response)  throws ServletException,  IOException {  
        doGet(request, response);                     
    }       
}

3.web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>ServletDemo02</display-name>
 
 <servlet>  
        <servlet-name>MyServlet</servlet-name>  
        <servlet-class>LoginServlet</servlet-class>  
    </servlet>  
  
    <servlet-mapping>  
        <servlet-name>MyServlet</servlet-name>  
            <url-pattern>/LoginServlet</url-pattern>  
    </servlet-mapping>  
 
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

4.index.jsp

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
        <form action="http://localhost:8080/ServletDemo02/LoginServlet" method="post">  
            用户:<input type="text" name="username" /><br/>  
            密码:<input type="password" name="password" /><br/>  
        <input type="submit" value="登录" />  
</body>
</html>


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2016/01/27 10:00
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