安装 tomcat

一。解压版

1.解压

2.catalina_home = /解压目录

3./bin/catalina.bat set Java_Home

二。安装版

1.下一步

2.catalina_home = /安装目标

创建web项目

1.创建项目

2.项目目录

代码

1.login.html


    Insert title here	
    	
    
     		用户名：
     
     
		密码：

2.LoginServlet.java

package com.sau.ums;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class LoginServlet extends HttpServlet {	private static final long serialVersionUID = 1L;		protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {		this.doPost(request, response);	}		protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {		/*		 * 1.获取请求报文中的信息		 */		//参数值与要获取的表单元素的name属性值相同		String username = request.getParameter("username");		String password = request.getParameter("password");				/*		 * 2.处理请求		 */		boolean isSuccess = false;		if("admin".equals(username) && "123456".equals(password)){			isSuccess = true;		}		/*		 * 3.生成响应		 */				//设置响应报文的内容类型		response.setContentType("text/html");		//设置响应报文的编码方式		response.setCharacterEncoding("utf-8");		//生成响应报文		PrintWriter out = response.getWriter();				if(isSuccess){			//成功			//输出响应信息			out.println("");			out.println("主页");			out.println("登录成功");			out.println("");					} else {			//失败			//输入响应			out.println("");			out.println("主页");			out.println("登录失败");			out.println("");		}				out.flush();		out.close();	}}

3.web.xml


    
      
       
       
        	
      
       login
        	
        	
      
        com.sau.ums.LoginServlet
        	
        	
      
       0
        
         
       
        	
      
       login
        	
        	
      
       /login.servlet
        
         
       
       	
      
       /login.html