jsp 密码加密传输 java 解密

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编程小达人之心 2024-10-12 12:39:07

文章标签 jsp 密码加密传输 java 解密数据库 java javascript ViewUI 文章分类 Java 后端开发

实现用户信息更新和重置密码功能

如果用户信息很多的时候，感觉这项实现起来比较麻烦的。因为要考虑用户哪些信息需要更新哪些不需要更新，就必须先更原来的信息比对。呵呵，当然如果考虑到多个数据库表间的操作的话，这些根本不值一提。

首先介绍用户信息更新功能：

用户信息更新JSP页面，userupdate.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>用户信息更新界面</title>
</head>
<body>
<form name="form1" action ="UserUpdateServlet" method = "post">
<table border ="1" align = "center" style="border-collapse:collapse;">
<c:forEach items="${list}" var="st">
<tr>
<td colspan="2">信息修改</td>
</tr>
<tr>
<td>用户ID</td>
<td>${st.userId }</td>
</tr>
<tr>
<td>用户名</td>
<td><input type="text" name="userName" value="${st.userName }"></td>
</tr>
<tr>
<td>用户账号</td>
<td><input type="text" name="userAccount" value="${st.userAccount }"></td>
</tr>
</c:forEach>
<tr>
<td colspan="2">
<input type="submit" value="修改">
<input type="button" value="重置密码" 
οnclick="window.location.href='/UserManage/RecoverPWDServlet'">
</td>
</tr>
</table>
</form>
</body>
</html>

用户信息更新Servlet，

package servlet;
import java.io.IOException;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import dao.UserDao;
import entity.User;
/**
 * 用户信息更新Servlet
 */
@WebServlet("/UserUpdateServlet")
public class UserUpdateServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setContentType("text/html;charset=UTF-8");
int userId = Integer.parseInt(req.getParameter("userId"));
//向session中保存userId
req.getSession().setAttribute("userId", userId);
UserDao ud = new UserDao();
User userInfo = ud.selectOneUserInfo(userId);
ArrayList<User> list = new ArrayList<User>();
list.add(userInfo);
req.setAttribute("list", list);
String msg = "用户信息已更新！";
req.setAttribute(msg, msg);
String path = resp.encodeURL("userupdate.jsp");
req.getRequestDispatcher(path).forward(req, resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setContentType("text/html;charset=UTF-8");
//从session中获取userId
HttpSession session = req.getSession();
int userId = (int) session.getAttribute("userId");
//获取用户表单数据
String userName = req.getParameter("userName");
String userAccount = req.getParameter("userAccount");
//实例化用户对象
User user = new User();
user.setUserId(userId);
user.setUserName(userName);
user.setUserAccount(userAccount);
//更新用户信息
UserDao ud = new UserDao();
ud.updateUser(user);
//跳转到用户管理界面
ArrayList<User> list = ud.selectNotDeleteList();
req.setAttribute("list", list);
String path = resp.encodeURL("userlist.jsp");
req.getRequestDispatcher(path).forward(req, resp);
}
}

数据库操作--用户信息更新方法

/**
 * 用户信息更新
 * @param user User对象
 */
public void updateUser(User user) {
Connection conn = null;
PreparedStatement ps = null;
//将用户数据写入数据库
try {
conn = DBUtils.getConnection();//获取连接对象Connection
String sql = "UPDATE users SET user_name=?,user_account=?"
+ " WHERE user_id=?";
ps = conn.prepareStatement(sql);//格式化sql语句
//为？赋值
ps.setString(1, user.getUserName());
ps.setString(2, user.getUserAccount());
ps.setInt(3, user.getUserId());
ps.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
//释放资源
DBUtils.closeAll(null, ps, conn);
}
}

其次介绍用户密码重置功能：

用户密码重置JSP页面，recoverpwd.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>重置用户密码界面</title>
<script language="javascript" type="text/javascript"> 
function check1() {
if (document.form1.userAccount.value==""){
alert("请输入用户账号!");
return false;
}
if (document.form1.userPassword.value==""){
alert("请输入用户密码");
return false;
}
if (document.form1.userPassword1.value==""){
alert("请输入确认密码!");
return false;
}
if (document.form1.userPassword.value!=document.form1.userPassword1.value){
alert("对不起!确认密码不等于登录密码");
return false;
}
return true; 
}
</script> 
</head>
<body>
<form name="form1" action="/UserManage/RecoverPWDServlet" method="post">
<table align="center">
<tr>
<td>用户账号</td>
<td><input type="text" name="userAccount" ></td>
</tr>
<tr>
<td>用户密码</td>
<td><input type="password" name="userPassword" ></td>
</tr>
<tr>
<td>确认密码</td>
<td><input type="password" name="userPassword1" ></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="确认更改" οnclick="return check1()">
</td>
</tr>
</table>
</form>
</body>
</html>

用户密码重置Servlet，RecoverPWDServlet.java

package servlet;
import java.io.IOException;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import dao.UserDao;
import entity.User;
/**
 * 重置用户密码Servlet
 */
@WebServlet("/RecoverPWDServlet")
public class RecoverPWDServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setContentType("text/html;charset=UTF-8");
String path1 = resp.encodeURL("recoverpwd.jsp");
req.getRequestDispatcher(path1).forward(req, resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setContentType("text/html;charset=UTF-8");
HttpSession session = req.getSession();
User user = null;
UserDao ud = new UserDao();
String userAccount = (String) req.getAttribute("userAccount");
String pwd = (String) req.getAttribute("userPassword");
ud.updateUserPWD(pwd,userAccount);
user = ud.selectOneUserInfo(userAccount);
//更新session对象中的user中属性。
session.setAttribute("user", user);
//跳转到用户管理界面
ArrayList<User> list = ud.selectNotDeleteList();
req.setAttribute("list", list);
String msg = "用户密码已重置！";
req.setAttribute(msg, msg);
String path1 = resp.encodeURL("userlist.jsp");
req.getRequestDispatcher(path1).forward(req, resp);
}
}

数据库操作--重置用户密码方法

/**重置用户密码
 * @param pwd 用户密码
 * @param userAccount 用户账号
 */
public void updateUserPWD(String pwd, String userAccount) {
Connection conn = null;
PreparedStatement ps = null;
//将用户数据写入数据库
try {
conn = DBUtils.getConnection();//获取连接对象Connection
String sql = "UPDATE users SET user_password=?"
+ " WHERE user_account=?";
ps = conn.prepareStatement(sql);//格式化sql语句
//为？赋值
ps.setString(1, pwd);
ps.setString(2, userAccount);
ps.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
//释放资源
DBUtils.closeAll(null, ps, conn);
}
}

到此，小小的用户管理模块就完成了。当初花不少时间自学和编写的，这是培训开课前老师安排的作业。当时javaSE差不多自学完，因为这个作业，就跳过了javaSE后面的学习。开始学习jdbc、MySQL和SQL语言、Servlet这些看视频教程，其余的参考网络资源。因为这个项目，积累了一些代码量和代码规范，以及养成了尽可能提高代码质量而修改代码的习惯。至今开课差不多2个月了，又做了三个小项目，会陆续贴上博客的。呵呵，谢谢观看！

转载于:https://blog.51cto.com/one2thr/1962961

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