第七周

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>ZHANGJUN</title>
  </head>

  <script type="text/javascript">
    function changeActionToRegister()
{
      var s = document.getElementById("idForm")
      s.setAttribute("action", "doRegister.jsp");
    }
    function changeActionToLogin()
{
      var s = document.getElementById("idForm")
      s.setAttribute("action", "doLogin.jsp");
    }
  </script>
<body>
<form id="idForm" method="post">
    用户名:<input type="text" name="username"/>
    <br>
    密码:<input type="password"  name="password"/>
    <br>
  <input type="submit" onclick="changeActionToLogin()" value="登录!!!">
  <input type="submit" onclick="changeActionToRegister()" value="注册!!!">
  </form>

  </body>
</html>
<%@ page import="com.Bean.Lty.UserBean" %>
<%@ page import="com.Dao.Lty.Dao" %>
<%@ page contentType="text/html;
charset=UTF-8" language="java" %>
<html>

<head>
    <title>ZHANGJUN</title>

</head>

<body>
    <%
        UserBean userBean = new UserBean();
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        userBean.setUname(username);
        userBean.setUpassword(password);
        Dao dao = new Dao();
        int i = Dao.UserLogin(userBean);
        if(i > 0)
{
            HttpSession session1 = request.getSession();

            session1.setAttribute("username",username);

            session1.setAttribute("password",password);

            request.getRequestDispatcher("success.jsp").forward(request,response);
        }

else

{
            response.sendRedirect("fail.jsp");
        }

    %>
</body>
</html>
<%@ page import="com.Bean.Lty.UserBean" %>
<%@ page import="com.Dao.Lty.Dao" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>

<head>

    <title>ZHANGJUN</title>
</head>
<body>

<%
    UserBean userBean = new UserBean();
    String username = request.getParameter("username");
    String password = request.getParameter("password");
    userBean.setUname(username);
    userBean.setUpassword(password);
    Dao dao = new Dao();
    int i = dao.UesrRegister(userBean);
    if(i > 0){
        HttpSession session1 = request.getSession();

        session1.setAttribute("username",username);

        session1.setAttribute("password",password);

        request.getRequestDispatcher("ok.jsp").forward(request,response);
    }

else

{
        response.sendRedirect("error.jsp");
    }

%>

</body>
</html>
package com.Bean.Lty;

public class UserBean {

    private String username;
    private String password;

    public UserBean() {

    }

    public UserBean(String uname, String upassword) {
        this.uname = uname;
        this.upassword = upassword;
    }

    public String getUname() {
        return usename;
    }

    public void setUname(String uname) {
        this.uname = username;
    }

    public String getUpassword() {
        return password;
    }

    public void setUpassword(String upassword) {
        this.password = password;
    }
}
package com.Dao.Lty;

import com.Bean.lty.UserBean;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class Dao 
{

    UserBean userBean = new UserBean();
    protected static Connection getConnection() throws Exception 
{
        Class.forName("com.mysql.jdbc.Driver");
        Connection conn = DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/user_info?useUnicode=true&characterEncoding=utf8", "root", "root");

        return conn;
    }

    public static void closeAll(Connection conn, PreparedStatement ps, ResultSet rs) throws Exception 
{
        if (rs != null)
            rs.close();
        if (ps != null)
            ps.close();
        if (conn != null)
            conn.close();
    }
    public int UesrRegister(UserBean userBean) throws Exception 
{
            int i = 0;
            Connection conn = getConnection();
            String sql = "insert into user(uname,upassword) values(?,?)";
            PreparedStatement ps = conn.prepareStatement(sql);
            ps.setString(1, userBean.getUname());
            ps.setString(2, userBean.getUpassword());
            return i = ps.executeUpdate();
    }
    public int UserLogin(UserBean userBean) throws Exception 
{
        int flag = 0;
        Connection conn = getConnection();
        String sql = "select * from user where uname = ? and upassword = ?";
        PreparedStatement ps = conn.prepareStatement(sql);
        ps.setString(1, userBean.getUname());
        ps.setString(2, userBean.getUpassword());
        ResultSet rs = ps.executeQuery();
        while (rs.next() == true)
{
            flag = 1;
        }
        return flag;
    }
}
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>ZHANGJUN</title>
</head>
<body>
恭喜你已经成功注册了账户！注册信息:用户名：<%=request.getSession().getAttribute("username")%>
用户密码：<%=request.getSession().getAttribute("password")%>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>ZHANGJUN</title>
</head>
<body>
你注册的信息不正确，请你重新进行注册！！！
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
你已经登录成功！！！欢迎您,用户名：<%=request.getSession().getAttribute("username")%>
密码：<%=request.getSession().getAttribute("password")%>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
你已经登录失败,你输入的用户名不存在！！！请重新注册！！！
</body>
</html>

 

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原文地址：https://www.cnblogs.com/zhangjun19991118/p/14675287.html