http无状态条件下的登录

具体实现代码：

前端代码：

用户名：

密码：

后台代码：

loginservlet：

package denglu.normal;

 

import java.io.IOException;

import java.io.PrintWriter;

 

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/login")

public class loginservlet extends HttpServlet{

 

    /**

     *

     */

    private static final long serialVersionUID = 1L;

    @Override

    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        // TODO Auto-generated method stub

        req.setCharacterEncoding("UTF-8");

        String name=req.getParameter("username");

        String password=req.getParameter("userpad");

        resp.setContentType("text/html;charset=UTF-8");

        PrintWriter out=resp.getWriter();

        System.out.println(name);

        System.out.println(password);

        if("洲洲".equals(name)&&"123456".equals(password))

        {

        out.print("欢迎:'"+ name +"'使用
");

        out.print("您有邮件");

        }

    }

}

 

 

 

 

 

 

 

chaxunservlet：

package denglu.normal;

 

import java.io.IOException;

import java.io.PrintWriter;

 

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/chaxun")

public class chaxunservlet extends HttpServlet{

 

    /**

     *

     */

    private static final long serialVersionUID = 1L;

    @Override

    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        // TODO Auto-generated method stub

        String name=req.getParameter("username");

        resp.setContentType("text/html;charset=UTF-8");

        PrintWriter out=resp.getWriter();

        out.print("欢迎:'"+ name +"'使用
");

        out.print("第一封邮件
");

        out.print("第二封邮件
");

        out.print("第三封邮件
");

    }

}

 

contenservlet：

package denglu.normal;

 

import java.io.IOException;

import java.io.PrintWriter;

 

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet("/content")

public class contentservlet extends HttpServlet{

 

    /**

     *

     */

    private static final long serialVersionUID = 1L;

    @Override

    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        // TODO Auto-generated method stub

        String name=req.getParameter("username");

        resp.setContentType("text/html;charset=UTF-8");

        PrintWriter out=resp.getWriter();

        out.print("欢迎:'"+ name +"'使用
");

        out.print("所谓的焦虑就是书读得太少，而想得又太多了");

    }

}