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

技术 2022年11月12日
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　　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

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

　　用户登录注册模板基础版　　目录结构【用户登录_02版】

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

<%@ 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" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >登录</a>
<a href="register.jsp" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >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

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

<%@ 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>登录</a>
<a href="register.jsp" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >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

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

　　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

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

<%@ 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" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >登录</a>
<a href="register.jsp" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >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

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

<%@ 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" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >登录</a>
<a href="register.jsp" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >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

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

　　

<%@ 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" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >登录</a>
<a href="register.jsp" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >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>");
// }
%>
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  • [ 技术 ] python开发_常用的python模块及安装方法
  • [ 技术 ] Educational Codeforces Round 11 C. Hard Process 二分
  • [ 技术 ] 下载Ubuntn 17.04 内核源代码
  • [ 技术 ] 可用Active Desktop Calendar V7.86 注册码序列号
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