功能設計
數據庫設計
項目搭建
創建MavenWeb項目
刪除pom文件中無用的配置
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.qing</groupId>
<artifactId>smbms</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
</project>
web.xml更新到最新版4.0
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0"
metadata-complete="true">
</web-app>
創建java和resources
配置Tomcat
測試項目是否運行成功
在gitee創建遠程倉庫並關聯
創建遠程倉庫
創建本地倉庫
Administrator@L87Y12K91TH8M2R MINGW64 /d/code/smbms
$ git init
Initialized empty Git repository in D:/code/smbms/.git/
Administrator@L87Y12K91TH8M2R MINGW64 /d/code/smbms (main)
$ ll -a
total 18
drwxr-xr-x 1 Administrator 197121 0 Apr 22 22:44 ./
drwxr-xr-x 1 Administrator 197121 0 Apr 21 23:43 ../
drwxr-xr-x 1 Administrator 197121 0 Apr 22 22:44 .git/
drwxr-xr-x 1 Administrator 197121 0 Apr 22 22:43 .idea/
-rw-r--r-- 1 Administrator 197121 435 Apr 21 23:48 pom.xml
-rw-r--r-- 1 Administrator 197121 81 Apr 21 23:44 smbms.iml
drwxr-xr-x 1 Administrator 197121 0 Apr 21 23:44 src/
drwxr-xr-x 1 Administrator 197121 0 Apr 22 22:36 target/
Administrator@L87Y12K91TH8M2R MINGW64 /d/code/smbms (main)
關聯遠程倉庫，並拉取遠程倉庫文件
D:\code\smbms>git remote add origin git@gitee.com:wl3pbzhyq/smbms.git
D:\code\smbms>git pull origin master
remote: Enumerating objects: 6, done.
remote: Counting objects: 100% (6/6), done.
remote: Compressing objects: 100% (6/6), done.
Unpacking objects: 100% (6/6), 13.30 KiB | 46.00 KiB/s, done.
From gitee.com:wl3pbzhyq/smbms
* branch master -> FETCH_HEAD
* [new branch] master -> origin/master
配置忽略文件
# target
target/
# idea
.idea/
*.iml
提交main分支到遠程倉庫
D:\code\smbms>git add .
warning: LF will be replaced by CRLF in src/main/webapp/index.jsp.
The file will have its original line endings in your working directory
D:\code\smbms>git status
On branch main
Changes to be committed:
(use "git restore --staged <file>..." to unstage)
modified: .gitignore
new file: pom.xml
new file: src/main/webapp/WEB-INF/web.xml
new file: src/main/webapp/index.jsp
D:\code\smbms>git commit -m "初始化"
[main cef378e] 初始化
4 files changed, 34 insertions(+)
create mode 100644 pom.xml
create mode 100644 src/main/webapp/WEB-INF/web.xml
create mode 100644 src/main/webapp/index.jsp
D:\code\smbms>git push --set-upstream origin main
Enumerating objects: 12, done.
Counting objects: 100% (12/12), done.
Delta compression using up to 4 threads
Compressing objects: 100% (7/7), done.
Writing objects: 100% (10/10), 1.14 KiB | 106.00 KiB/s, done.
Total 10 (delta 1), reused 0 (delta 0), pack-reused 0
remote: Powered by GITEE.COM [GNK-5.0]
remote: Create a pull request for 'main' on Gitee by visiting:
remote: https://gitee.com/wl3pbzhyq/smbms/pull/new/wl3pbzhyq:main...wl3pbzhyq:master
To gitee.com:wl3pbzhyq/smbms.git
* [new branch] main -> main
Branch 'main' set up to track remote branch 'main' from 'origin'.
D:\code\smbms>
pom.xml添加依賴：servlet，jsp，JSTL表達式，standard標簽庫，mysql驅動，lombok
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.qing</groupId>
<artifactId>smbms</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<dependencies>
<!--Servlet-->
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
</dependency>
<!--JSP-->
<!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
</dependency>
<!--JSTL表達式-->
<!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl-api -->
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2</version>
</dependency>
<!--standard標簽庫-->
<!-- https://mvnrepository.com/artifact/taglibs/standard -->
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<!--mysql驅動-->
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<!--lombok-->
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
</dependency>
</dependencies>
</project>
創建項目包結構
編寫實體類：ORM映射：表-類映射
idea連接數據庫
編寫實體類
/*
Navicat MySQL Data Transfer
Source Server : local
Source Server Version : 50729
Source Host : localhost:3306
Source Database : smbms
Target Server Type : MYSQL
Target Server Version : 50729
File Encoding : 65001
Date: 2021-04-26 23:06:06
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for `smbms_address`
-- ----------------------------
DROP TABLE IF EXISTS `smbms_address`;
CREATE TABLE `smbms_address` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '收貨地址主鍵',
`user_id` int(11) DEFAULT NULL COMMENT '用戶主鍵',
`contact` varchar(64) DEFAULT NULL COMMENT '聯系人',
`address` varchar(64) DEFAULT NULL COMMENT '地址',
`post_code` varchar(64) DEFAULT NULL COMMENT '郵政編碼',
`phone` varchar(64) DEFAULT NULL COMMENT '電話',
`create_by` int(11) DEFAULT NULL COMMENT '創建者',
`create_date` datetime DEFAULT NULL COMMENT '創建時間',
`modify_by` int(11) DEFAULT NULL COMMENT '更新者',
`modify_date` datetime DEFAULT NULL COMMENT '更新時間',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='收貨地址表';
-- ----------------------------
-- Records of smbms_address
-- ----------------------------
-- ----------------------------
-- Table structure for `smbms_bill`
-- ----------------------------
DROP TABLE IF EXISTS `smbms_bill`;
CREATE TABLE `smbms_bill` (
`id` int(11) NOT NULL COMMENT '賬單主鍵',
`provider_id` int(11) DEFAULT NULL COMMENT '供應商主鍵',
`code` varchar(64) DEFAULT NULL COMMENT '賬單編號',
`product_name` varchar(64) DEFAULT NULL COMMENT '商品名稱',
`product_desc` varchar(64) DEFAULT NULL COMMENT '商品描述',
`product_unit` varchar(64) DEFAULT NULL COMMENT '商品單位',
`product_count` decimal(20,2) DEFAULT NULL COMMENT '商品數量',
`total_price` decimal(20,2) DEFAULT NULL COMMENT '總金額',
`status` int(11) DEFAULT NULL COMMENT '賬單狀態：1未支付/2已支付',
`create_by` int(11) DEFAULT NULL COMMENT '創建者',
`create_date` datetime DEFAULT NULL COMMENT '創建時間',
`modify_by` int(11) DEFAULT NULL COMMENT '更新者',
`modify_date` datetime DEFAULT NULL COMMENT '更新時間',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='賬單表';
-- ----------------------------
-- Records of smbms_bill
-- ----------------------------
-- ----------------------------
-- Table structure for `smbms_provider`
-- ----------------------------
DROP TABLE IF EXISTS `smbms_provider`;
CREATE TABLE `smbms_provider` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '供應商主鍵',
`code` varchar(64) DEFAULT NULL COMMENT '供應商編號',
`name` varchar(64) DEFAULT NULL COMMENT '供應商名稱',
`pro_desc` varchar(64) DEFAULT NULL COMMENT '供應商描述',
`contact` varchar(64) DEFAULT NULL COMMENT '聯系人',
`phone` varchar(64) DEFAULT NULL COMMENT '電話',
`address` varchar(64) DEFAULT NULL COMMENT '地址',
`fax` varchar(64) DEFAULT NULL COMMENT '傳真',
`create_by` int(11) DEFAULT NULL COMMENT '創建者',
`create_date` datetime DEFAULT NULL COMMENT '創建時間',
`modify_by` int(11) DEFAULT NULL COMMENT '更新者',
`modify_date` datetime DEFAULT NULL COMMENT '更新時間',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='供應商表';
-- ----------------------------
-- Records of smbms_provider
-- ----------------------------
-- ----------------------------
-- Table structure for `smbms_role`
-- ----------------------------
DROP TABLE IF EXISTS `smbms_role`;
CREATE TABLE `smbms_role` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '角色主鍵',
`code` varchar(64) DEFAULT NULL COMMENT '角色編號',
`name` varchar(64) DEFAULT NULL COMMENT '角色名稱',
`create_by` int(11) DEFAULT NULL COMMENT '創建者',
`create_date` datetime DEFAULT NULL COMMENT '創建時間',
`modify_by` int(11) DEFAULT NULL COMMENT '更新者',
`modify_date` datetime DEFAULT NULL COMMENT '更新時間',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='角色表';
-- ----------------------------
-- Records of smbms_role
-- ----------------------------
-- ----------------------------
-- Table structure for `smbms_user`
-- ----------------------------
DROP TABLE IF EXISTS `smbms_user`;
CREATE TABLE `smbms_user` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '用戶主鍵',
`role_id` int(11) DEFAULT NULL COMMENT '角色主鍵',
`code` varchar(64) DEFAULT NULL COMMENT '用戶編號',
`name` varchar(64) DEFAULT NULL COMMENT '用戶名稱',
`password` varchar(64) DEFAULT NULL COMMENT '用戶密碼',
`gender` int(11) DEFAULT NULL COMMENT '性別：1男/2女',
`birthday` date DEFAULT NULL COMMENT '出生日期',
`phone` varchar(64) DEFAULT NULL COMMENT '電話',
`address` varchar(64) DEFAULT NULL COMMENT '地址',
`create_by` int(11) DEFAULT NULL COMMENT '創建者',
`create_date` datetime DEFAULT NULL COMMENT '創建時間',
`modify_by` int(11) DEFAULT NULL COMMENT '更新者',
`modify_date` datetime DEFAULT NULL COMMENT '更新時間',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='用戶表';
-- ----------------------------
-- Records of smbms_user
-- ----------------------------
編寫基礎公共類
數據庫配置文件 db.properties
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/smbms?useUnicode=true&characterEncoding=utf8&useSSL=false
username=root
password=123456
編寫數據庫的公共類：獲取數據庫連接，釋放資源，公共查詢，公共增刪改
package com.qing.dao;
import java.io.IOException;
import java.io.InputStream;
import java.sql.*;
import java.util.Properties;
/**
* 操作數據庫的公共類
*/
public class BaseDao {
private static String driver;
private static String url;
private static String username;
private static String password;
/**
* 靜態代碼塊，類加載的時候初始化
*/
static {
Properties properties = new Properties();
// 通過類加載器讀取資源：資源轉為流
InputStream is = BaseDao.class.getClassLoader().getResourceAsStream("db.properties");
try {
properties.load(is);
driver = properties.getProperty("driver");
url = properties.getProperty("url");
username = properties.getProperty("username");
password = properties.getProperty("password");
Class.forName(driver);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 獲取數據庫連接
*/
public static Connection getConnection() {
Connection connection = null;
try {
connection = DriverManager.getConnection(url, username, password);
} catch (Exception e) {
e.printStackTrace();
}
return connection;
}
/**
* 公共查詢
*/
public static ResultSet execute(Connection connection,String sql,PreparedStatement ps,Object[] params,ResultSet rs) throws SQLException {
ps = connection.prepareStatement(sql);
for (int i = 0; i < params.length; i++) {
// 占位符從1開始，數組從0開始
ps.setObject(i+1,params[i]);
}
rs = ps.executeQuery();
return rs;
}
/**
* 公共增刪改
*/
public static int execute(Connection connection,String sql,PreparedStatement ps,Object[] params) throws SQLException {
ps = connection.prepareStatement(sql);
for (int i = 0; i < params.length; i++) {
// 占位符從1開始，數組從0開始
ps.setObject(i+1,params[i]);
}
// 影響的行數
int updateRows = ps.executeUpdate();
return updateRows;
}
/**
* 釋放資源
*/
public static boolean close(Connection connection,PreparedStatement ps,ResultSet rs) {
boolean flag = true;
if (rs != null) {
try {
rs.close();
// GC回收
rs = null;
} catch (SQLException e) {
e.printStackTrace();
flag = false;
}
}
if (ps != null) {
try {
ps.close();
// GC回收
ps = null;
} catch (SQLException e) {
e.printStackTrace();
flag = false;
}
}
if (connection != null) {
try {
connection.close();
// GC回收
connection = null;
} catch (SQLException e) {
e.printStackTrace();
flag = false;
}
}
return flag;
}
}
編寫字符編碼過濾器，web.xml中配置過濾器
package com.qing.filter;
import javax.servlet.*;
import java.io.IOException;
/**
* 字符編碼過濾器
*/
public class CharacterEncodingFilter implements Filter {
public void init(FilterConfig filterConfig) throws ServletException {
}
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
servletRequest.setCharacterEncoding("utf-8");
servletResponse.setCharacterEncoding("utf-8");
// 讓請求繼續通行，如果不寫，程序到這里就被攔截停止
filterChain.doFilter(servletRequest,servletResponse);
}
public void destroy() {
}
}
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0"
metadata-complete="true">
<!--字符編碼過濾器-->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>com.qing.filter.CharacterEncodingFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
導入靜態資源
登錄功能實現
編寫前端頁面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>系統登錄 - 超市訂單管理系統</title>
<link type="text/css" rel="stylesheet" href="${pageContext.request.contextPath}/css/style.css"/>
</head>
<body class="login_bg">
<section class="loginBox">
<header class="loginHeader">
<h1>超市訂單管理系統</h1>
</header>
<section class="loginCont">
<form class="loginForm" action="${pageContext.request.contextPath}/login.do" method="post" name="actionForm"
id="actionForm">
<div class="info">${error}</div>
<div class="inputbox">
<label for="code">用戶名：</label>
<input type="text" class="input-text" id="code" name="code" placeholder="請輸入用戶名" required/>
</div>
<div class="inputbox">
<label for="password">密碼：</label>
<input type="password" id="password" name="password" placeholder="請輸入密碼" required/>
</div>
<div class="subBtn">
<input type="submit" value="登錄"/>
<input type="reset" value="重置"/>
</div>
</form>
</section>
</section>
</body>
</html>
設置歡迎頁面：web.xml中設置
<!--設置歡迎頁面-->
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0"
metadata-complete="true">
<!--字符編碼過濾器-->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>com.qing.filter.CharacterEncodingFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--設置歡迎頁面-->
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
</web-app>
編寫Dao層接口和實現類：根據編號獲取用戶方法
package com.qing.dao.user;
import com.qing.pojo.User;
import java.sql.Connection;
import java.sql.SQLException;
/**
* 用戶Dao接口
*/
public interface UserDao {
/**
* 根據編號和密碼獲取用戶
*/
public User getLoginUser(Connection connection, String code, String password) throws SQLException;
}
package com.qing.dao.user;
import com.qing.dao.BaseDao;
import com.qing.pojo.User;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
* 用戶Dao實現類
*/
public class UserDaoImpl implements UserDao {
/**
* 根據編號和密碼獲取用戶
*/
public User getLoginUser(Connection connection, String code, String password) throws SQLException {
User user = null;
if (connection != null) {
PreparedStatement ps = null;
ResultSet rs = null;
String sql = "select * from smbms_user where code=? and password=?";
Object[] params = {code,password};
rs = BaseDao.execute(connection, ps, rs, sql, params);
if (rs.next()) {
user = new User();
user.setId(rs.getInt("id"));
user.setCode(rs.getString("code"));
user.setName(rs.getString("name"));
user.setPassword(rs.getString("password"));
}
// 關閉資源，連接有可能還要使用，不關閉
BaseDao.close(null,ps,rs);
}
return user;
}
}
package com.qing.dao.user;
import com.qing.dao.BaseDao;
import com.qing.pojo.User;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
* 用戶Dao實現類
*/
public class UserDaoImpl implements UserDao {
/**
* 根據編號獲取用戶
*/
public User getUserByCode(Connection connection, String code) throws SQLException {
User user = null;
if (connection != null) {
PreparedStatement ps = null;
ResultSet rs = null;
String sql = "select * from smbms_user where code=?";
Object[] params = {code};
rs = BaseDao.execute(connection, ps, rs, sql, params);
if (rs.next()) {
user = new User();
user.setId(rs.getInt("id"));
user.setCode(rs.getString("code"));
user.setName(rs.getString("name"));
user.setPassword(rs.getString("password"));
}
// 關閉資源，連接有可能還要使用，不關閉
BaseDao.close(null,ps,rs);
}
return user;
}
}
編寫Service層接口和實現類：登錄方法
pom.xml引入junit
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
</dependency>
package com.qing.service.user;
import com.qing.pojo.User;
import java.sql.SQLException;
/**
* 用戶Service接口
*/
public interface UserService {
/**
* 用戶登錄
*/
public User login(String code,String password);
}
package com.qing.service.user;
import com.qing.dao.BaseDao;
import com.qing.dao.user.UserDao;
import com.qing.dao.user.UserDaoImpl;
import com.qing.pojo.User;
import org.junit.Test;
import java.sql.Connection;
import java.sql.SQLException;
/**
* 用戶Service實現類
*/
public class UserServiceImpl implements UserService {
// 用戶Dao
private UserDao userDao;
public UserServiceImpl() {
userDao = new UserDaoImpl();
}
/**
* 用戶登錄
*/
public User login(String code,String password) {
User user = null;
Connection connection = BaseDao.getConnection();
try {
user = userDao.getLoginUser(connection, code, password);
} catch (SQLException e) {
e.printStackTrace();
} finally {
BaseDao.close(connection,null,null);
}
return user;
}
@Test
public void test() {
User user = new UserServiceImpl().login("admin", "");
System.out.println(user != null ? user.getPassword() : "用戶名或密碼錯誤");
}
}
編寫Servlet層類：登錄Servlet，web.xml注冊Servlet
編寫公共常量類
package com.qing.util;
/**
* 公共常量類
*/
public class Constants {
public static final String USER_SESSION = "userSession"; // 用戶Session
}
package com.qing.servlet.user;
import com.qing.pojo.User;
import com.qing.service.user.UserService;
import com.qing.service.user.UserServiceImpl;
import com.qing.util.Constants;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* 登錄接口
*/
public class LoginServlet extends HttpServlet {
// 用戶Service
private UserService userService;
public LoginServlet() {
userService = new UserServiceImpl();
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("進入LoginServlet--doGet");
String code = req.getParameter("code");
String password = req.getParameter("password");
// 獲取登錄用戶
User user = userService.login(code, password);
// 有此用戶，可以登錄
if (user != null) {
// 將用戶信息放到session中
req.getSession().setAttribute(Constants.USER_SESSION,user);
// 重定向到主頁
resp.sendRedirect("jsp/frame.jsp");
} else {
// 無此用戶，轉發到登錄頁,返回提示信息
req.setAttribute("error","用戶名或密碼錯誤");
req.setAttribute("code",code);
req.setAttribute("password",password);
req.getRequestDispatcher("login.jsp").forward(req,resp);
}
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
}
<!--注冊登錄Servlet-->
<servlet>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>com.qing.servlet.user.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/login.do</url-pattern>
</servlet-mapping>
測試訪問
登錄功能優化
退出系統功能：編寫退出Servlet類，web.xml中注冊
package com.qing.servlet.user;
import com.qing.pojo.User;
import com.qing.util.Constants;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* 退出接口
*/
public class LogoutServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("進入LogoutServlet--doGet");
// 刪除session中的用戶信息
req.getSession().removeAttribute(Constants.USER_SESSION);
// 重定向到登錄頁面
resp.sendRedirect(req.getContextPath() + "/login.jsp");
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
}
<!--注冊退出Servlet-->
<servlet>
<servlet-name>LogoutServlet</servlet-name>
<servlet-class>com.qing.servlet.user.LogoutServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LogoutServlet</servlet-name>
<url-pattern>/jsp/logout.do</url-pattern>
</servlet-mapping>
登錄攔截功能：編寫登錄驗證過濾器，web.xml中注冊
package com.qing.filter;
import com.qing.pojo.User;
import com.qing.util.Constants;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* 登錄驗證過濾器
*/
public class SysFilter implements Filter {
public void init(FilterConfig filterConfig) throws ServletException {
}
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
User user = (User) request.getSession().getAttribute(Constants.USER_SESSION);
// 用戶已登錄，繼續執行；用戶未登錄或已退出，重定向到錯誤頁面，程序攔截停止，不繼續執行
if (user == null) {
response.sendRedirect(request.getContextPath() + "/error.jsp");
} else {
filterChain.doFilter(servletRequest,servletResponse);
}
}
public void destroy() {
}
}
<!--登錄驗證過濾器-->
<filter>
<filter-name>SysFilter</filter-name>
<filter-class>com.qing.filter.SysFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SysFilter</filter-name>
<url-pattern>/jsp/*</url-pattern>
</filter-mapping>
密碼修改
web.xml中設置session過期時間
<!--設置session過期時間：30分-->
<session-config>
<session-timeout>30</session-timeout>
</session-config>
pom.xml添加fastjson依賴
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.76</version>
</dependency>
編寫前端頁面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%@include file="/jsp/common/head.jsp" %>
<div class="right">
<div class="location">
<strong>你現在所在的位置是:</strong>
<span>密碼修改頁面</span>
</div>
<div class="providerAdd">
<form id="userForm" name="userForm" method="post" action="${pageContext.request.contextPath }/jsp/user.do">
<input type="hidden" name="method" value="savepwd">
<!--div的class 為error是驗證錯誤，ok是驗證成功-->
<div class="info">${message}</div>
<div class="">
<label for="oldPassword">舊密碼：</label>
<input type="password" name="oldpassword" id="oldpassword" value="">
<font color="red"></font>
</div>
<div>
<label for="newPassword">新密碼：</label>
<input type="password" name="newpassword" id="newpassword" value="">
<font color="red"></font>
</div>
<div>
<label for="rnewpassword">確認新密碼：</label>
<input type="password" name="rnewpassword" id="rnewpassword" value="">
<font color="red"></font>
</div>
<div class="providerAddBtn">
<!--<a href="#">保存</a>-->
<input type="button" name="save" id="save" value="保存" class="input-button">
</div>
</form>
</div>
</div>
</section>
<%@include file="/jsp/common/foot.jsp" %>
<script type="text/javascript" src="${pageContext.request.contextPath }/js/pwdmodify.js"></script>
編寫后端服務
package com.qing.servlet.user;
import com.alibaba.fastjson.JSON;
import com.mysql.jdbc.StringUtils;
import com.qing.pojo.User;
import com.qing.service.user.UserService;
import com.qing.service.user.UserServiceImpl;
import com.qing.util.Constants;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;
/**
* 用戶接口
*/
public class UserServlet extends HttpServlet {
// 用戶Service
private UserService userService;
public UserServlet() {
userService = new UserServiceImpl();
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("進入UserServlet--doGet");
String method = req.getParameter("method");
if ("savepwd".equals(method)) {
updateOwnPwd(req,resp);
} else if ("pwdmodify".equals(method)) {
checkPwd(req,resp);
}
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
/**
* 驗證自己的密碼
* @param req
* @param resp
*/
private void checkPwd(HttpServletRequest req, HttpServletResponse resp) {
Map<String,String> resultMap = new HashMap<String,String>();
String oldpassword = req.getParameter("oldpassword");
// 舊密碼輸入為空
if (StringUtils.isNullOrEmpty(oldpassword)) {
resultMap.put("result","error");
} else {
Object o = req.getSession().getAttribute(Constants.USER_SESSION);
// 當前用戶session過期，請重新登錄
if (o == null) {
resultMap.put("result","sessionerror");
} else {
String password = ((User) o).getPassword();
// 舊密碼正確
if (oldpassword.equals(password)) {
resultMap.put("result", "true");
// 舊密碼輸入不正確
} else {
resultMap.put("result", "false");
}
}
}
try {
resp.setContentType("application/json");
PrintWriter writer = resp.getWriter();
writer.write(JSON.toJSONString(resultMap));
writer.flush();
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 修改自己的密碼
* @param req
* @param resp
*/
private void updateOwnPwd(HttpServletRequest req, HttpServletResponse resp) {
Object o = req.getSession().getAttribute(Constants.USER_SESSION);
if (o != null && ((User) o).getId() != null) {
Integer id = ((User) o).getId();
String password = req.getParameter("newpassword");
boolean flag = userService.updatePwd(id, password);
// 修改密碼成功，移除session中的用戶信息
if (flag) {
req.getSession().removeAttribute(Constants.USER_SESSION);
req.setAttribute("message","修改密碼成功，請退出，使用新密碼登錄");
} else {
// 修改密碼失敗
req.setAttribute("message","修改密碼失敗");
}
} else {
// 修改密碼失敗
req.setAttribute("message","修改密碼失敗");
}
// 轉發到修改密碼頁
try {
req.getRequestDispatcher("pwdmodify.jsp").forward(req,resp);
} catch (ServletException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
web.xml中注冊用戶Servlet
<!--用戶Servlet-->
<servlet>
<servlet-name>UserServlet</servlet-name>
<servlet-class>com.qing.servlet.user.UserServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UserServlet</servlet-name>
<url-pattern>/jsp/user.do</url-pattern>
</servlet-mapping>
用戶管理
編寫前端頁面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%@include file="/jsp/common/head.jsp" %>
<div class="right">
<div class="location">
<strong>你現在所在的位置是:</strong>
<span>用戶管理頁面</span>
</div>
<div class="search">
<form method="get" action="${pageContext.request.contextPath }/jsp/user.do">
<input name="method" value="query" class="input-text" type="hidden">
<span>用戶名：</span>
<input name="queryname" class="input-text" type="text" value="${queryname }">
<span>用戶角色：</span>
<select name="queryUserRole">
<c:if test="${roleList != null }">
<option value="">--請選擇--</option>
<c:forEach var="role" items="${roleList}">
<option
<c:if test="${role.id == queryUserRole }">selected="selected"</c:if>
value="${role.id}">${role.name}</option>
</c:forEach>
</c:if>
</select>
<input type="hidden" name="pageIndex" value="1"/>
<input value="查 詢" type="submit" id="searchbutton">
<a href="${pageContext.request.contextPath}/jsp/useradd.jsp">添加用戶</a>
</form>
</div>
<!--用戶-->
<table class="providerTable" cellpadding="0" cellspacing="0">
<tr class="firstTr">
<th width="10%">用戶編碼</th>
<th width="20%">用戶名稱</th>
<th width="10%">性別</th>
<th width="10%">年齡</th>
<th width="10%">電話</th>
<th width="10%">用戶角色</th>
<th width="30%">操作</th>
</tr>
<c:forEach var="user" items="${userList }" varStatus="status">
<tr>
<td>
<span>${user.code }</span>
</td>
<td>
<span>${user.name }</span>
</td>
<td>
<span>
<c:if test="${user.gender==1}">男</c:if>
<c:if test="${user.gender==2}">女</c:if>
</span>
</td>
<td>
<span>${user.age}</span>
</td>
<td>
<span>${user.phone}</span>
</td>
<td>
<span>${user.roleName}</span>
</td>
<td>
<span><a class="viewUser" href="javascript:;" userid=${user.id } username=${user.name }><img
src="${pageContext.request.contextPath }/images/read.png" alt="查看" title="查看"/></a></span>
<span><a class="modifyUser" href="javascript:;" userid=${user.id } username=${user.name }><img
src="${pageContext.request.contextPath }/images/xiugai.png" alt="修改" title="修改"/></a></span>
<span><a class="deleteUser" href="javascript:;" userid=${user.id } username=${user.name }><img
src="${pageContext.request.contextPath }/images/schu.png" alt="刪除" title="刪除"/></a></span>
</td>
</tr>
</c:forEach>
</table>
<input type="hidden" id="totalPageCount" value="${totalPageCount}"/>
<c:import url="rollpage.jsp">
<c:param name="totalCount" value="${totalCount}"/>
<c:param name="currentPageNo" value="${currentPageNo}"/>
<c:param name="totalPageCount" value="${totalPageCount}"/>
</c:import>
</div>
</section>
<!--點擊刪除按鈕后彈出的頁面-->
<div class="zhezhao"></div>
<div class="remove" id="removeUse">
<div class="removerChid">
<h2>提示</h2>
<div class="removeMain">
<p>你確定要刪除該用戶嗎？</p>
<a href="#" id="yes">確定</a>
<a href="#" id="no">取消</a>
</div>
</div>
</div>
<%@include file="/jsp/common/foot.jsp" %>
<script type="text/javascript" src="${pageContext.request.contextPath }/js/userlist.js"></script>
編寫分頁工具類
package com.qing.util;
public class PageSupport {
//當前頁碼-來自於用戶輸入
private int currentPageNo = 1;
//總數量（表）
private int totalCount = 0;
//頁面容量
private int pageSize = 0;
//總頁數-totalCount/pageSize（+1）
private int totalPageCount = 1;
public int getCurrentPageNo() {
return currentPageNo;
}
public void setCurrentPageNo(int currentPageNo) {
if (currentPageNo > 0) {
this.currentPageNo = currentPageNo;
}
}
public int getTotalCount() {
return totalCount;
}
public void setTotalCount(int totalCount) {
if (totalCount > 0) {
this.totalCount = totalCount;
//設置總頁數
this.setTotalPageCountByRs();
}
}
public int getPageSize() {
return pageSize;
}
public void setPageSize(int pageSize) {
if (pageSize > 0) {
this.pageSize = pageSize;
}
}
public int getTotalPageCount() {
return totalPageCount;
}
public void setTotalPageCount(int totalPageCount) {
this.totalPageCount = totalPageCount;
}
public void setTotalPageCountByRs() {
if (this.totalCount % this.pageSize == 0) {
this.totalPageCount = this.totalCount / this.pageSize;
} else if (this.totalCount % this.pageSize > 0) {
this.totalPageCount = this.totalCount / this.pageSize + 1;
} else {
this.totalPageCount = 0;
}
}
}
編寫后端服務
package com.qing.servlet.user;
import com.alibaba.fastjson.JSON;
import com.mysql.jdbc.StringUtils;
import com.qing.pojo.Role;
import com.qing.pojo.User;
import com.qing.service.user.RoleService;
import com.qing.service.user.RoleServiceImpl;
import com.qing.service.user.UserService;
import com.qing.service.user.UserServiceImpl;
import com.qing.util.Constants;
import com.qing.util.PageSupport;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* 用戶接口
*/
public class UserServlet extends HttpServlet {
// 用戶Service
private UserService userService;
// 角色Service
private RoleService roleService;
public UserServlet() {
userService = new UserServiceImpl();
roleService = new RoleServiceImpl();
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("進入UserServlet--doGet");
String method = req.getParameter("method");
if ("savepwd".equals(method)) {
updateOwnPwd(req,resp);
} else if ("pwdmodify".equals(method)) {
checkPwd(req,resp);
} else if ("query".equals(method)) {
query(req,resp);
}
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
/**
* 驗證自己的密碼
* @param req
* @param resp
*/
private void checkPwd(HttpServletRequest req, HttpServletResponse resp) {
Map<String,String> resultMap = new HashMap<String,String>();
String oldpassword = req.getParameter("oldpassword");
// 舊密碼輸入為空
if (StringUtils.isNullOrEmpty(oldpassword)) {
resultMap.put("result","error");
} else {
Object o = req.getSession().getAttribute(Constants.USER_SESSION);
// 當前用戶session過期，請重新登錄
if (o == null) {
resultMap.put("result","sessionerror");
} else {
String password = ((User) o).getPassword();
// 舊密碼正確
if (oldpassword.equals(password)) {
resultMap.put("result", "true");
// 舊密碼輸入不正確
} else {
resultMap.put("result", "false");
}
}
}
try {
resp.setContentType("application/json");
PrintWriter writer = resp.getWriter();
writer.write(JSON.toJSONString(resultMap));
writer.flush();
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 修改自己的密碼
* @param req
* @param resp
*/
private void updateOwnPwd(HttpServletRequest req, HttpServletResponse resp) {
Object o = req.getSession().getAttribute(Constants.USER_SESSION);
if (o != null && ((User) o).getId() != null) {
Integer id = ((User) o).getId();
String password = req.getParameter("newpassword");
boolean flag = userService.updatePwd(id, password);
// 修改密碼成功，移除session中的用戶信息
if (flag) {
req.getSession().removeAttribute(Constants.USER_SESSION);
req.setAttribute("message","修改密碼成功，請退出，使用新密碼登錄");
} else {
// 修改密碼失敗
req.setAttribute("message","修改密碼失敗");
}
} else {
// 修改密碼失敗
req.setAttribute("message","修改密碼失敗");
}
// 轉發到修改密碼頁
try {
req.getRequestDispatcher("pwdmodify.jsp").forward(req,resp);
} catch (ServletException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 用戶列表
* @param req
* @param resp
*/
private void query(HttpServletRequest req, HttpServletResponse resp) {
// 用戶列表
String queryname = req.getParameter("queryname");
if (! StringUtils.isNullOrEmpty(queryname)) {
req.setAttribute("queryname",queryname);
}
String queryUserRole = req.getParameter("queryUserRole");
if (! StringUtils.isNullOrEmpty(queryUserRole)) {
req.setAttribute("queryUserRole",queryUserRole);
}
String pageIndex = req.getParameter("pageIndex");
if (StringUtils.isNullOrEmpty(pageIndex)) {
pageIndex = "1";
}
int currentPageNo = Integer.parseInt(pageIndex);
int pageSize = 2;
List<User> userList = userService.list(queryname, queryUserRole, currentPageNo, pageSize);
req.setAttribute("userList",userList);
// 用戶數量
int totalCount = userService.count(queryname, queryUserRole);
// 分頁
PageSupport pageSupport = new PageSupport();
pageSupport.setCurrentPageNo(currentPageNo);
pageSupport.setPageSize(pageSize);
pageSupport.setTotalCount(totalCount);
pageSupport.setTotalPageCountByRs();
int totalPageCount = pageSupport.getTotalPageCount();
req.setAttribute("totalCount", totalCount);
req.setAttribute("currentPageNo", currentPageNo);
req.setAttribute("totalPageCount", totalPageCount);
// 角色列表
List<Role> roleList = roleService.list();
req.setAttribute("roleList",roleList);
// 轉發到用戶列表頁
try {
req.getRequestDispatcher("userlist.jsp").forward(req,resp);
} catch (ServletException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}