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  • JavaWeb_(request和response)用户登录注册模板_基础版

    　　用户登录注册模板进阶版　　传送门

    用户登录注册模板基础版

    　　登录：当用户登录成功时，跳转到personCenter.jsp，当用户登录失败时，跳转到login.jsp并给出提示

    　　注册：当用户注册成功时，跳转到login.jsp，当用户注册失败时，跳转到register.jsp并给出提示

    　　personCenter.jsp展示用户信息

    　　用户登录注册模板基础版　　目录结构【用户登录_02版】

    　　

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<a href="login.jsp">登录</a>
<a href="register.jsp">注册</a>

</body>
</html>
    index.jsp
    <%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<%
Object msg = request.getAttribute("message");
if(msg!=null)
    out.println(msg);
%>

登录<hr>
<form action="login_do.jsp" methon="post">
用户名：<input type="text" name="username" /><br/>
密码    ：<input type="password" name="password" /><br/>

<input type="submit" value="登录"/>
</form>
</body>
</html>
    login.jsp
    <%@page import="com.Gary.util.DBUtil" %>
<%@page import="com.Gary.model.User" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%
String username = request.getParameter("username");
String password = request.getParameter("password");

User user = DBUtil.verifyAccount(username,password);
if(user==null){
//    out.println("登录失败，用户名或密码错误");
    request.setAttribute("message","登录失败，用户名或密码错误");
    request.getRequestDispatcher("login.jsp").forward(request,response);
}else{
//    out.println("登录成功");
    //登录请求的转发,将数据传递给personCenter.jsp页面
    request.setAttribute("user", user);
    request.getRequestDispatcher("personCenter.jsp").forward(request,response);
    
}
%>
</body>
</html>
    login_do.jsp
    <%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%
Object msg = request.getAttribute("message");
if(msg!=null)
    out.println(msg);
%>

<form action="register_do.jsp" methon="post">
用户名：<input type="text" name="username" /><br/>
密码：    <input type="password" name="password" /><br/>
年龄：    <input type="text" name="age" /><br/>
性别：男<input type="radio" name="sex" value="男" />女<input type="radio" name="sex" value="女"/><br/>

<input type="submit" value="注册"/>
</form>

</body>
</html>
    register.jsp
    <%@ page import="com.Gary.util.DBUtil" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%

String username = request.getParameter("username");
String password = request.getParameter("password"); 
int age = Integer.parseInt(request.getParameter("age"));
String sex = request.getParameter("sex");

boolean isSuccess = DBUtil.addUser(username,password,age,sex);

//使用请求转发
if(isSuccess){
    request.setAttribute("message", "注册成功，请登录");
    //通过getRequestDispatcher传递路径将请求转发给login.jsp
    request.getRequestDispatcher("login.jsp").forward(request,response);
}else{
    request.setAttribute("message", "注册失败，用户名重复");
    //通过getRequestDispatcher传递路径将请求转发给login.jsp
    request.getRequestDispatcher("register.jsp").forward(request,response);
}

// if(isSuccess){
//     out.println(username);
//      out.println("<font color='green'>注册成功</font>");
// }else{
//     out.println(username);
//     out.println("<font color='red'>注册失败</font>");
// }
%>
</body>
</html>
    register_do.jsp
    <%@ page import="com.Gary.model.User" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%
User user = (User)request.getAttribute("user");
%>

用户名：<%=user.getUsername()%><br/>
年龄：<%=user.getAge()%><br/>
性别：<%=user.getSex()%><br/>
</body>
</html>
    personCenter.jsp
    package com.Gary.model;

public class User {
    private String username;
    private String password;
    private int age;
    private String sex;
    public User(String username, String password, int age, String sex) {
        super();
        this.username = username;
        this.password = password;
        this.age = age;
        this.sex = sex;
    }
    
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    
    
    
}
    User.java
    package com.Gary.util;

import java.util.HashMap;
import java.util.Map;

import com.Gary.model.User;


public class DBUtil {
    
    private static Map<String ,User>db = new HashMap<String,User>();
    
    public static boolean addUser(String username,String password,int age,String sex) {
        //TODO
        
        if(db.containsKey(username)) {
            return false;
        }else {
            User user=new User(username,password,age,sex);
            db.put(username, user);
            return true;
        }
    }
    
    //账号校验
    public static User verifyAccount(String username,String password) {
        if(db.containsKey(username)) {
            User user = db.get(username);
            if(user.getPassword().equals(password)) {
                return user;
            }else {
                return null;
            }
        }
        return null;
    }
}
    DBUtil.java

    用户注册_01版

    　　当用户点击主页面注册时跳转到register.jsp页面，用户输入完表单后由register_do.jsp页面进行处理，户数据模型驱动User,java和DBUtild.java中对数据进行本地处理

    　　DBUtild.java对用户ID进行同名检测，用户注册成功显示绿色提示信息，用户注册失败显示红色提示信息

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<a>登录</a>
<a href="register.jsp">注册</a>

</body>
</html>
    index.jsp
    <%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<form action="register_do.jsp" methon="post">
用户名：<input type="text" name="username" /><br/>
密码：    <input type="password" name="password" /><br/>
年龄：    <input type="text" name="age" /><br/>
性别：男<input type="radio" name="sex" value="男" />女<input type="radio" name="sex" value="女"/><br/>

<input type="submit" value="注册"/>
</form>

</body>
</html>
    register.jsp
    <%@ page import="com.Gary.util.DBUtil" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%

String username = request.getParameter("username");
String password = request.getParameter("password"); 
int age = Integer.parseInt(request.getParameter("age"));
String sex = request.getParameter("sex");

boolean isSuccess = DBUtil.addUser(username,password,age,sex);
if(isSuccess){
    out.println(username);
     out.println("<font color='green'>注册成功</font>");
}else{
    out.println(username);
    out.println("<font color='red'>注册失败</font>");
}
%>
</body>
</html>
    register_do.jsp
    package com.Gary.model;

public class User {
    private String username;
    private String password;
    private int age;
    private String sex;
    public User(String username, String password, int age, String sex) {
        super();
        this.username = username;
        this.password = password;
        this.age = age;
        this.sex = sex;
    }
    
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    
    
    
}
    User.java
    package com.Gary.util;

import java.util.HashMap;
import java.util.Map;

import com.Gary.model.User;


public class DBUtil {
    
    private static Map<String ,User>db = new HashMap<String,User>();
    
    public static boolean addUser(String username,String password,int age,String sex) {
        //TODO
        
        if(db.containsKey(username)) {
            return false;
        }else {
            User user=new User(username,password,age,sex);
            db.put(username, user);
            return true;
        }
    }
}
    DBUtil.java

    　　

    　　开发注册界面

    　　表单

    　　

    　　用户表单信息注册完毕后提交表单给register_do.jsp

    <form action="register_do.jsp" methon="post">
用户名：<input type="text" name="username" /><br/>
密码：    <input type="password" name="password" /><br/>
年龄：    <input type="text" name="age" /><br/>
性别：男<input type="radio" name="sex" value="男" />女<input type="radio" name="sex" value="女"/><br/>

<input type="submit" value="注册"/>
</form>

    　　户数据模型驱动User,java存储用户信息，DBUtil.java运用字典集对数据进行本地存储

        private static Map<String ,User>db = new HashMap<String,User>();

    　　通过DBUtil.java中的addUser()方法对用户进行本地注册，返回bool值，当用户注册ID相同时返回false，否则返回true

            if(db.containsKey(username)) {
            return false;
        }else {
            User user=new User(username,password,age,sex);
            db.put(username, user);
            return true;
        }

    　　由register_do.java对用户信息进行校验

    boolean isSuccess = DBUtil.addUser(username,password,age,sex);
if(isSuccess){
    out.println(username);
     out.println("<font color='green'>注册成功</font>");
}else{
    out.println(username);
    out.println("<font color='red'>注册失败</font>");
}

    用户注册_02版

    　　当用户通过首页直接进入login.jsp时，login.jsp页面只显示登录字样，用户通过register.jsp进入login.jsp页面时，跳转到login.jsp并提示用户注册成功

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<a href="login.jsp">登录</a>
<a href="register.jsp">注册</a>

</body>
</html>
    index.jsp
    <%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<%
Object msg = request.getAttribute("message");
if(msg!=null)
    out.println(msg);
%>

登录<hr>
<form action="" methon="post">
用户名：<input type="text" name="username" /><br/>
密码    ：<input type="password" name="password" /><br/>

<input type="submit" value="登录"/>
</form>
</body>
</html>
    login.jsp
    <%@ page import="com.Gary.util.DBUtil" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%

String username = request.getParameter("username");
String password = request.getParameter("password"); 
int age = Integer.parseInt(request.getParameter("age"));
String sex = request.getParameter("sex");

boolean isSuccess = DBUtil.addUser(username,password,age,sex);

//使用请求转发
if(isSuccess){
    request.setAttribute("message", "注册成功，请登录");
    //通过getRequestDispatcher传递路径将请求转发给login.jsp
    request.getRequestDispatcher("login.jsp").forward(request,response);
}

// if(isSuccess){
//     out.println(username);
//      out.println("<font color='green'>注册成功</font>");
// }else{
//     out.println(username);
//     out.println("<font color='red'>注册失败</font>");
// }
%>
</body>
</html>
    register_do.jsp
    <%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<form action="register_do.jsp" methon="post">
用户名：<input type="text" name="username" /><br/>
密码：    <input type="password" name="password" /><br/>
年龄：    <input type="text" name="age" /><br/>
性别：男<input type="radio" name="sex" value="男" />女<input type="radio" name="sex" value="女"/><br/>

<input type="submit" value="注册"/>
</form>

</body>
</html>
    register.jsp
    package com.Gary.model;

public class User {
    private String username;
    private String password;
    private int age;
    private String sex;
    public User(String username, String password, int age, String sex) {
        super();
        this.username = username;
        this.password = password;
        this.age = age;
        this.sex = sex;
    }
    
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    
    
    
}
    User.java
    package com.Gary.util;

import java.util.HashMap;
import java.util.Map;

import com.Gary.model.User;


public class DBUtil {
    
    private static Map<String ,User>db = new HashMap<String,User>();
    
    public static boolean addUser(String username,String password,int age,String sex) {
        //TODO
        
        if(db.containsKey(username)) {
            return false;
        }else {
            User user=new User(username,password,age,sex);
            db.put(username, user);
            return true;
        }
    }
}
    DBUtil.Java

    　　当登录成功时，通过在register_do.jsp页面中表单传递时进行转发给login,jsp页面【跳转到login.jsp页面】

    boolean isSuccess = DBUtil.addUser(username,password,age,sex);

//使用请求转发
if(isSuccess){
    request.setAttribute("message", "注册成功，请登录");
    //通过getRequestDispatcher传递路径将请求转发给login.jsp
    request.getRequestDispatcher("login.jsp").forward(request,response);
}

    　　

    　　login,jsp页面最开始时进行判断是否由register.jsp传递过来信息

    <%
Object msg = request.getAttribute("message");
if(msg!=null)
    out.println(msg);
%>

    用户登录_01版

    　　当用户登录后，login.jsp表单中的信息与数据库中的账号进行匹配，当用户的账号存在时且密码输入正确，提示用户登录成功，用户名不存在或用户名与账号匹配错误时提示登录失败

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<a href="login.jsp">登录</a>
<a href="register.jsp">注册</a>

</body>
</html>
    index.jsp
    <%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<%
Object msg = request.getAttribute("message");
if(msg!=null)
    out.println(msg);
%>

登录<hr>
<form action="login_do.jsp" methon="post">
用户名：<input type="text" name="username" /><br/>
密码    ：<input type="password" name="password" /><br/>

<input type="submit" value="登录"/>
</form>
</body>
</html>
    login.jsp
    <%@page import="com.Gary.util.DBUtil" %>
<%@page import="com.Gary.model.User" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%
String username = request.getParameter("username");
String password = request.getParameter("password");

User user = DBUtil.verifyAccount(username,password);
if(user==null){
    out.println("登录失败，用户名或密码错误");
}else{
    out.println("登录成功");
}
%>
</body>
</html>
    login_do.html
    <%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<form action="register_do.jsp" methon="post">
用户名：<input type="text" name="username" /><br/>
密码：    <input type="password" name="password" /><br/>
年龄：    <input type="text" name="age" /><br/>
性别：男<input type="radio" name="sex" value="男" />女<input type="radio" name="sex" value="女"/><br/>

<input type="submit" value="注册"/>
</form>

</body>
</html>
    Vregister.jsp
    <%@ page import="com.Gary.util.DBUtil" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%

String username = request.getParameter("username");
String password = request.getParameter("password"); 
int age = Integer.parseInt(request.getParameter("age"));
String sex = request.getParameter("sex");

boolean isSuccess = DBUtil.addUser(username,password,age,sex);

//使用请求转发
if(isSuccess){
    request.setAttribute("message", "注册成功，请登录");
    //通过getRequestDispatcher传递路径将请求转发给login.jsp
    request.getRequestDispatcher("login.jsp").forward(request,response);
}

// if(isSuccess){
//     out.println(username);
//      out.println("<font color='green'>注册成功</font>");
// }else{
//     out.println(username);
//     out.println("<font color='red'>注册失败</font>");
// }
%>
</body>
</html>
    register_do.jsp
    package com.Gary.model;

public class User {
    private String username;
    private String password;
    private int age;
    private String sex;
    public User(String username, String password, int age, String sex) {
        super();
        this.username = username;
        this.password = password;
        this.age = age;
        this.sex = sex;
    }
    
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    
    
    
}
    User.java
    package com.Gary.util;

import java.util.HashMap;
import java.util.Map;

import com.Gary.model.User;


public class DBUtil {
    
    private static Map<String ,User>db = new HashMap<String,User>();
    
    public static boolean addUser(String username,String password,int age,String sex) {
        //TODO
        
        if(db.containsKey(username)) {
            return false;
        }else {
            User user=new User(username,password,age,sex);
            db.put(username, user);
            return true;
        }
    }
    
    //账号校验
    public static User verifyAccount(String username,String password) {
        if(db.containsKey(username)) {
            User user = db.get(username);
            if(user.getPassword().equals(password)) {
                return user;
            }else {
                return null;
            }
        }
        return null;
    }
}
    DBUtil.java

    　　当用户提交登录信息时，由login_do处理用户登录的信息，

    　　通过DBUtil.java中的verifyAccount()进行用户校验，当用户名存在并密码与用户相匹配时返回true

        public static User verifyAccount(String username,String password) {
        if(db.containsKey(username)) {
            User user = db.get(username);
            if(user.getPassword().equals(password)) {
                return user;
            }else {
                return null;
            }
        }
        return null;
    }

    　　

    　　login_do.jsp中进行账号校验

    User user = DBUtil.verifyAccount(username,password);
if(user==null){
    out.println("登录失败，用户名或密码错误");
}else{
    out.println("登录成功");
}

    用户登录_02版

    　　登录：当用户登录成功时，跳转到personCenter.jsp，当用户登录失败时，跳转到login.jsp并给出提示

    　　注册：当用户注册成功时，跳转到login.jsp，当用户注册失败时，跳转到register.jsp并给出提示

    　　personCenter.jsp展示用户信息

    　　

    <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<a href="login.jsp">登录</a>
<a href="register.jsp">注册</a>

</body>
</html>
    index.jsp
    <%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>

<%
Object msg = request.getAttribute("message");
if(msg!=null)
    out.println(msg);
%>

登录<hr>
<form action="login_do.jsp" methon="post">
用户名：<input type="text" name="username" /><br/>
密码    ：<input type="password" name="password" /><br/>

<input type="submit" value="登录"/>
</form>
</body>
</html>
    login.jsp
    <%@page import="com.Gary.util.DBUtil" %>
<%@page import="com.Gary.model.User" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%
String username = request.getParameter("username");
String password = request.getParameter("password");

User user = DBUtil.verifyAccount(username,password);
if(user==null){
//    out.println("登录失败，用户名或密码错误");
    request.setAttribute("message","登录失败，用户名或密码错误");
    request.getRequestDispatcher("login.jsp").forward(request,response);
}else{
//    out.println("登录成功");
    //登录请求的转发,将数据传递给personCenter.jsp页面
    request.setAttribute("user", user);
    request.getRequestDispatcher("personCenter.jsp").forward(request,response);
    
}
%>
</body>
</html>
    login_do.jsp
    <%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%
Object msg = request.getAttribute("message");
if(msg!=null)
    out.println(msg);
%>

<form action="register_do.jsp" methon="post">
用户名：<input type="text" name="username" /><br/>
密码：    <input type="password" name="password" /><br/>
年龄：    <input type="text" name="age" /><br/>
性别：男<input type="radio" name="sex" value="男" />女<input type="radio" name="sex" value="女"/><br/>

<input type="submit" value="注册"/>
</form>

</body>
</html>
    register.jsp
    <%@ page import="com.Gary.util.DBUtil" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%

String username = request.getParameter("username");
String password = request.getParameter("password"); 
int age = Integer.parseInt(request.getParameter("age"));
String sex = request.getParameter("sex");

boolean isSuccess = DBUtil.addUser(username,password,age,sex);

//使用请求转发
if(isSuccess){
    request.setAttribute("message", "注册成功，请登录");
    //通过getRequestDispatcher传递路径将请求转发给login.jsp
    request.getRequestDispatcher("login.jsp").forward(request,response);
}else{
    request.setAttribute("message", "注册失败，用户名重复");
    //通过getRequestDispatcher传递路径将请求转发给login.jsp
    request.getRequestDispatcher("register.jsp").forward(request,response);
}

// if(isSuccess){
//     out.println(username);
//      out.println("<font color='green'>注册成功</font>");
// }else{
//     out.println(username);
//     out.println("<font color='red'>注册失败</font>");
// }
%>
</body>
</html>
    register_do.jsp
    <%@ page import="com.Gary.model.User" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<%
User user = (User)request.getAttribute("user");
%>

用户名：<%=user.getUsername()%><br/>
年龄：<%=user.getAge()%><br/>
性别：<%=user.getSex()%><br/>
</body>
</html>
    personCenter.jsp
    package com.Gary.model;

public class User {
    private String username;
    private String password;
    private int age;
    private String sex;
    public User(String username, String password, int age, String sex) {
        super();
        this.username = username;
        this.password = password;
        this.age = age;
        this.sex = sex;
    }
    
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    
    
    
}
    User.java
    package com.Gary.model;

public class User {
    private String username;
    private String password;
    private int age;
    private String sex;
    public User(String username, String password, int age, String sex) {
        super();
        this.username = username;
        this.password = password;
        this.age = age;
        this.sex = sex;
    }
    
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    
    
    
}
    DBUtil.java

    　　personCenter.jsp通过request内置对象得到用户信息后输出其信息

    <%
User user = (User)request.getAttribute("user");
%>

用户名：<%=user.getUsername()%><br/>
年龄：<%=user.getAge()%><br/>
性别：<%=user.getSex()%><br/>

    　　login_do.jsp处理用户登录成功时和登录失败时事件

    <%
String username = request.getParameter("username");
String password = request.getParameter("password");

User user = DBUtil.verifyAccount(username,password);
if(user==null){
//    out.println("登录失败，用户名或密码错误");
    request.setAttribute("message","登录失败，用户名或密码错误");
    request.getRequestDispatcher("login.jsp").forward(request,response);
}else{
//    out.println("登录成功");
    //登录请求的转发,将数据传递给personCenter.jsp页面
    request.setAttribute("user", user);
    request.getRequestDispatcher("personCenter.jsp").forward(request,response);
    
}
%>

    　　register_do.jsp处理用户注册成功时和注册失败时事件

    <%

String username = request.getParameter("username");
String password = request.getParameter("password"); 
int age = Integer.parseInt(request.getParameter("age"));
String sex = request.getParameter("sex");

boolean isSuccess = DBUtil.addUser(username,password,age,sex);

//使用请求转发
if(isSuccess){
    request.setAttribute("message", "注册成功，请登录");
    //通过getRequestDispatcher传递路径将请求转发给login.jsp
    request.getRequestDispatcher("login.jsp").forward(request,response);
}else{
    request.setAttribute("message", "注册失败，用户名重复");
    //通过getRequestDispatcher传递路径将请求转发给login.jsp
    request.getRequestDispatcher("register.jsp").forward(request,response);
}

// if(isSuccess){
//     out.println(username);
//      out.println("<font color='green'>注册成功</font>");
// }else{
//     out.println(username);
//     out.println("<font color='red'>注册失败</font>");
// }
%>
    (如需转载学习，请标明出处)
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  • 原文地址：https://www.cnblogs.com/1138720556Gary/p/10293791.html
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