java web 后台用户管理系统（servlet+jsp+bootstrap 、MVC架构）
java web 后台用户管理系统（MVC架构）
dao层
userDao
package cn.itcast.dao;import cn.itcast.domain.User;import java.util.List;import java.util.Map;/** * 用户操作的DAO */public interface UserDao { /** * 查询所有用户信息 * @return */ public List<User> findAll();/** * 登录方法 * @param user * @return */ User findUserByUsernameAndPassword(String username, String password); /** * 保存User * @param user */ void add(User user);/** * 根据id删除User * @param id */ void delete(int id);/** * 根据id查询 * @param id * @return */ User findById(int i); /** * 修改用户信息 * @param user */ void update(User user); /** * 查询总记录数 * @return * @param condition */ int findTotalCount(Map<String, String[]> condition); /** * 分页查询每页记录 * @param start * @param rows * @param condition * @return */ List<User> findByPage(int start, int rows, Map<String, String[]> condition);}userDaoImpl
package cn.itcast.dao.impl;import cn.itcast.dao.UserDao;import cn.itcast.domain.User;import cn.itcast.util.JDBCUtils;import org.springframework.jdbc.core.BeanPropertyRowMapper;import org.springframework.jdbc.core.JdbcTemplate;import java.util.ArrayList;import java.util.List;import java.util.Map;import java.util.Set;public class UserDaoImpl implements UserDao { private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource()); @Override public List<User> findAll() { //使用JDBC操作数据库... //1.定义sql String sql = "select * from user"; List<User> users = template.query(sql, new BeanPropertyRowMapper<User>(User.class)); return users; } @Override public User findUserByUsernameAndPassword(String username, String password) { try { String sql = "select * from user where username = ? and password = ?"; User user = template.queryForObject(sql, new BeanPropertyRowMapper<User>(User.class), username, password); return user; } catch (Exception e) { e.printStackTrace(); return null; } } @Override public void add(User user) { //1.定义sql String sql = "insert into user values(null,?,?,?,?,?,?,null,null)"; //2.执行sql template.update(sql, user.getName(), user.getGender(), user.getAge(), user.getAddress(), user.getQq(), user.getEmail()); } @Override public void delete(int id) { //1.定义sql String sql = "delete from user where id = ?"; //2.执行sql template.update(sql, id); } @Override public User findById(int id) { String sql = "select * from user where id = ?"; return template.queryForObject(sql, new BeanPropertyRowMapper<User>(User.class), id); } @Override public void update(User user) { String sql = "update user set name = ?,gender = ? ,age = ? , address = ? , qq = ?, email = ? where id = ?"; template.update(sql, user.getName(), user.getGender(), user.getAge(), user.getAddress(), user.getQq(), user.getEmail(), user.getId()); } @Override public int findTotalCount(Map<String, String[]> condition) { //1.定义模板初始化sql String sql = "select count(*) from user where 1 = 1 "; StringBuilder sb = new StringBuilder(sql); //2.遍历map Set<String> keySet = condition.keySet(); //定义参数的集合 List<Object> params = new ArrayList<Object>(); for (String key : keySet) { //排除分页条件参数 if("currentPage".equals(key) || "rows".equals(key)){ continue; } //获取value String value = condition.get(key)[0]; //判断value是否有值 if(value != null && !"".equals(value)){ //有值 sb.append(" and "+key+" like ? "); params.add("%"+value+"%");//？条件的值 } } System.out.println(sb.toString()); System.out.println(params); return template.queryForObject(sb.toString(),Integer.class,params.toArray()); } @Override public List<User> findByPage(int start, int rows, Map<String, String[]> condition) { String sql = "select * from user where 1 = 1 "; //2.遍历map Set<String> keySet = condition.keySet(); //定义参数的集合 List<Object> params = new ArrayList<Object>(); for (String key : keySet) { //排除分页条件参数 if("currentPage".equals(key) || "rows".equals(key)){ continue; } //获取value String value = condition.get(key)[0]; //判断value是否有值 if(value != null && !"".equals(value)){ //有值 sb.append(" and "+key+" like ? "); params.add("%"+value+"%");//？条件的值 } } //添加分页查询 sb.append(" limit ?,? "); //添加分页查询参数值 params.add(start); params.add(rows); sql = sb.toString(); System.out.println(sql); System.out.println(params); return template.query(sql,new BeanPropertyRowMapper<User>(User.class),params.toArray()); }}Service层
service
package cn.itcast.service;import cn.itcast.domain.PageBean;import cn.itcast.domain.User;import java.util.List;import java.util.Map;/** * 用户管理的业务接口 */public interface UserService { /** * 查询所有用户信息 * @return */ public List<User> findAll(); /** * 登录方法 * @param user * @return */ User login(User user); /** * 保存User * @param user */ void addUser(User user); /** * 根据id删除User * @param id */ void deleteUser(String id); /** * 根据id查询 * @param id * @return */ User findUserById(String id); /** * 修改用户信息 * @param user */ void updateUser(User user); /** * 批量删除用户 * @param ids */ void delSelectedUser(String[] ids); /** * 分页条件查询 * @param currentPage * @param rows * @param condition * @return */ PageBean<User> findUserByPage(String currentPage, String rows, Map<String, String[]> condition);}serviceImpl
package cn.itcast.service.impl;import cn.itcast.dao.UserDao;import cn.itcast.dao.impl.UserDaoImpl;import cn.itcast.domain.PageBean;import cn.itcast.domain.User;import cn.itcast.service.UserService;import java.util.List;import java.util.Map;public class UserServiceImpl implements UserService { private UserDao dao = new UserDaoImpl(); @Override public List<User> findAll() { //调用Dao完成查询 return dao.findAll(); } @Override public User login(User user) { return dao.findUserByUsernameAndPassword(user.getUsername(),user.getPassword()); } @Override public void addUser(User user) { dao.add(user); } @Override public void deleteUser(String id) { dao.delete(Integer.parseInt(id)); } @Override public User findUserById(String id) { return dao.findById(Integer.parseInt(id)); } @Override public void updateUser(User user) { dao.update(user); } @Override public void delSelectedUser(String[] ids) { if(ids != null && ids.length > 0){ //1.遍历数组 for (String id : ids) { //2.调用dao删除 dao.delete(Integer.parseInt(id)); } } } @Override public PageBean<User> findUserByPage(String _currentPage, String _rows, Map<String, String[]> condition) { int currentPage = Integer.parseInt(_currentPage); int rows = Integer.parseInt(_rows); if(currentPage <=0) { currentPage = 1; } //1.创建空的PageBean对象 PageBean<User> pb = new PageBean<User>(); //2.设置参数 pb.setCurrentPage(currentPage); pb.setRows(rows); //3.调用dao查询总记录数 int totalCount = dao.findTotalCount(condition); pb.setTotalCount(totalCount); //4.调用dao查询List集合 //计算开始的记录索引 int start = (currentPage - 1) * rows; List<User> list = dao.findByPage(start,rows,condition); pb.setList(list); //5.计算总页码 int totalPage = (totalCount % rows) == 0 ? totalCount/rows : (totalCount/rows) + 1; pb.setTotalPage(totalPage); return pb; }}web层（servlet）
AddUserServlet
package cn.itcast.web.servlet;import cn.itcast.domain.User;import cn.itcast.service.UserService;import cn.itcast.service.impl.UserServiceImpl;import org.apache.commons.beanutils.BeanUtils;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 java.io.IOException;import java.lang.reflect.InvocationTargetException;import java.util.Map;@WebServlet("/addUserServlet")public class AddUserServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.设置编码 request.setCharacterEncoding("utf-8"); //2.获取参数 Map<String, String[]> map = request.getParameterMap(); //3.封装对象 User user = new User(); try { BeanUtils.populate(user,map); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } //4.调用Service保存 UserService service = new UserServiceImpl(); service.addUser(user); //5.跳转到userListServlet response.sendRedirect(request.getContextPath()+"/userListServlet"); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); }}CheckCodeServlet
package cn.itcast.web.servlet;import javax.imageio.ImageIO;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 java.awt.*;import java.awt.image.BufferedImage;import java.io.IOException;import java.util.Random;/** * 验证码 */@WebServlet("/checkCodeServlet")public class CheckCodeServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {//服务器通知浏览器不要缓存response.setHeader("pragma","no-cache");response.setHeader("cache-control","no-cache");response.setHeader("expires","0");//在内存中创建一个长80，宽30的图片，默认黑色背景//参数一：长//参数二：宽//参数三：颜色int width = 80;int height = 30;BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);//获取画笔Graphics g = image.getGraphics();//设置画笔颜色为灰色g.setColor(Color.GRAY);//填充图片g.fillRect(0,0, width,height);//产生4个随机验证码，12EyString checkCode = getCheckCode();//将验证码放入HttpSession中request.getSession().setAttribute("CHECKCODE_SERVER",checkCode);//设置画笔颜色为黄色g.setColor(Color.YELLOW);//设置字体的小大g.setFont(new Font("黑体",Font.BOLD,24));//向图片上写入验证码g.drawString(checkCode,15,25);//将内存中的图片输出到浏览器//参数一：图片对象//参数二：图片的格式，如PNG,JPG,GIF//参数三：图片输出到哪里去ImageIO.write(image,"PNG",response.getOutputStream());}/** * 产生4位随机字符串 */private String getCheckCode() {String base = "0123456789ABCDEFGabcdefg";int size = base.length();Random r = new Random();StringBuffer sb = new StringBuffer();for(int i=1;i<=4;i++){//产生0到size-1的随机值int index = r.nextInt(size);//在base字符串中获取下标为index的字符char c = base.charAt(index);//将c放入到StringBuffer中去sb.append(c);}return sb.toString();}public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doGet(request,response);}}DelSelectedServlet
package cn.itcast.web.servlet;import cn.itcast.service.UserService;import cn.itcast.service.impl.UserServiceImpl;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 java.io.IOException;@WebServlet("/delSelectedServlet")public class DelSelectedServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.获取所有id String[] ids = request.getParameterValues("uid"); //2.调用service删除 UserService service = new UserServiceImpl(); service.delSelectedUser(ids); //3.跳转查询所有Servlet response.sendRedirect(request.getContextPath()+"/userListServlet"); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); }}DelUserServlet
package cn.itcast.web.servlet;import cn.itcast.service.UserService;import cn.itcast.service.impl.UserServiceImpl;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 java.io.IOException;@WebServlet("/delUserServlet")public class DelUserServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.获取id String id = request.getParameter("id"); //2.调用service删除 UserService service = new UserServiceImpl(); service.deleteUser(id); //3.跳转到查询所有Servlet response.sendRedirect(request.getContextPath()+"/userListServlet"); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); }}FindUserByPageServlet
package cn.itcast.web.servlet;import cn.itcast.domain.PageBean;import cn.itcast.domain.User;import cn.itcast.service.UserService;import cn.itcast.service.impl.UserServiceImpl;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 java.io.IOException;import java.util.Map;@WebServlet("/findUserByPageServlet")public class FindUserByPageServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); //1.获取参数 String currentPage = request.getParameter("currentPage");//当前页码 String rows = request.getParameter("rows");//每页显示条数 if(currentPage == null || "".equals(currentPage)){ currentPage = "1"; } if(rows == null || "".equals(rows)){ rows = "5"; } //获取条件查询参数 Map<String, String[]> condition = request.getParameterMap(); //2.调用service查询 UserService service = new UserServiceImpl(); PageBean<User> pb = service.findUserByPage(currentPage,rows,condition); System.out.println(pb); //3.将PageBean存入request request.setAttribute("pb",pb); request.setAttribute("condition",condition);//将查询条件存入request //4.转发到list.jsp request.getRequestDispatcher("/list.jsp").forward(request,response); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); }}FindUserServlet
package cn.itcast.web.servlet;import cn.itcast.domain.User;import cn.itcast.service.UserService;import cn.itcast.service.impl.UserServiceImpl;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 java.io.IOException;@WebServlet("/findUserServlet")public class FindUserServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.获取id String id = request.getParameter("id"); //2.调用Service查询 UserService service = new UserServiceImpl(); User user = service.findUserById(id); //3.将user存入request request.setAttribute("user",user); //4.转发到update.jsp request.getRequestDispatcher("/update.jsp").forward(request,response); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); }}LoginServlet
package cn.itcast.web.servlet;import cn.itcast.domain.User;import cn.itcast.service.UserService;import cn.itcast.service.impl.UserServiceImpl;import org.apache.commons.beanutils.BeanUtils;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 java.io.IOException;import java.lang.reflect.InvocationTargetException;import java.util.Map;@WebServlet("/loginServlet")public class LoginServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.设置编码 request.setCharacterEncoding("utf-8"); //2.获取数据 //2.1获取用户填写验证码 String verifycode = request.getParameter("verifycode"); //3.验证码校验 HttpSession session = request.getSession(); String checkcode_server = (String) session.getAttribute("CHECKCODE_SERVER"); session.removeAttribute("CHECKCODE_SERVER");//确保验证码一次性 if(!checkcode_server.equalsIgnoreCase(verifycode)){ //验证码不正确 //提示信息 request.setAttribute("login_msg","验证码错误！"); //跳转登录页面 request.getRequestDispatcher("/login.jsp").forward(request,response); return; } Map<String, String[]> map = request.getParameterMap(); //4.封装User对象 User user = new User(); try { BeanUtils.populate(user,map); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } //5.调用Service查询 UserService service = new UserServiceImpl(); User loginUser = service.login(user); //6.判断是否登录成功 if(loginUser != null){ //登录成功 //将用户存入session session.setAttribute("user",loginUser); //跳转页面 response.sendRedirect(request.getContextPath()+"/index.jsp"); }else{ //登录失败 //提示信息 request.setAttribute("login_msg","用户名或密码错误！"); //跳转登录页面 request.getRequestDispatcher("/login.jsp").forward(request,response); } } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); }}UpdateUserServlet
package cn.itcast.web.servlet;import cn.itcast.domain.User;import cn.itcast.service.UserService;import cn.itcast.service.impl.UserServiceImpl;import org.apache.commons.beanutils.BeanUtils;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 java.io.IOException;import java.lang.reflect.InvocationTargetException;import java.util.Map;@WebServlet("/updateUserServlet")public class UpdateUserServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.设置编码 request.setCharacterEncoding("utf-8"); //2.获取map Map<String, String[]> map = request.getParameterMap(); //3.封装对象 User user = new User(); try { BeanUtils.populate(user,map); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } //4.调用Service修改 UserService service = new UserServiceImpl(); service.updateUser(user); //5.跳转到查询所有Servlet response.sendRedirect(request.getContextPath()+"/userListServlet"); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); }}UserListServlet
package cn.itcast.web.servlet;import cn.itcast.domain.User;import cn.itcast.service.UserService;import cn.itcast.service.impl.UserServiceImpl;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 java.io.IOException;import java.util.List;@WebServlet("/userListServlet")public class UserListServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.调用UserService完成查询 UserService service = new UserServiceImpl(); List<User> users = service.findAll(); //2.将list存入request域 request.setAttribute("users",users); //3.转发到list.jsp request.getRequestDispatcher("/list.jsp").forward(request,response); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); }}jsp页面
add.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %><!-- HTML5文档--><!DOCTYPE html><!-- 网页使用的语言 --><html lang="zh-CN"><head> <!-- 指定字符集 --> <meta charset="utf-8"> <!-- 使用Edge最新的浏览器的渲染方式 --> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。 width: 默认宽度与设备的宽度相同 initial-scale: 初始的缩放比，为1:1 --> <meta name="viewport" content="width=device-width, initial-scale=1"> <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ --> <title>添加用户</title> <!-- 1. 导入CSS的全局样式 --> <link href="css/bootstrap.min.css" rel="stylesheet"> <!-- 2. jQuery导入，建议使用1.9以上的版本 --> <script src="js/jquery-2.1.0.min.js"></script> <!-- 3. 导入bootstrap的js文件 --> <script src="js/bootstrap.min.js"></script></head><body><div class="container"> <center><h3>添加联系人页面</h3></center> <form action="${pageContext.request.contextPath}/addUserServlet" method="post"> <div class="form-group"> <label for="name">姓名：</label> <input type="text" class="form-control" id="name" name="name" placeholder="请输入姓名"> </div> <div class="form-group"> <label>性别：</label> <input type="radio" name="gender" value="男" checked="checked"/>男 <input type="radio" name="gender" value="女"/>女 </div> <div class="form-group"> <label for="age">年龄：</label> <input type="text" class="form-control" id="age" name="age" placeholder="请输入年龄"> </div> <div class="form-group"> <label for="address">籍贯：</label> <select name="address" class="form-control" id="address"> <option value="陕西">陕西</option> <option value="北京">北京</option> <option value="上海">上海</option> </select> </div> <div class="form-group"> <label for="qq">QQ：</label> <input type="text" class="form-control" id="qq" name="qq" placeholder="请输入QQ号码"/> </div> <div class="form-group"> <label for="email">Email：</label> <input type="text" class="form-control" id="email" name="email" placeholder="请输入邮箱地址"/> </div> <div class="form-group" style="text-align: center"> <input class="btn btn-primary" type="submit" value="提交" /> <input class="btn btn-default" type="reset" value="重置" /> <input class="btn btn-default" type="button" value="返回" /> </div> </form></div></body></html>index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><!DOCTYPE html><html lang="zh-CN"><head> <meta charset="utf-8"/> <meta http-equiv="X-UA-Compatible" content="IE=edge"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>首页</title> <!-- 1. 导入CSS的全局样式 --> <link href="css/bootstrap.min.css" rel="stylesheet"> <!-- 2. jQuery导入，建议使用1.9以上的版本 --> <script src="js/jquery-2.1.0.min.js"></script> <!-- 3. 导入bootstrap的js文件 --> <script src="js/bootstrap.min.js"></script> <script type="text/javascript"> </script></head><body> <div >${user.name},欢迎您</div> <div align="center"> <a href="${pageContext.request.contextPath}/findUserByPageServlet" style="text-decoration:none;font-size:33px">查询所有用户信息 </a> </div></body></html>list.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %><%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><!DOCTYPE html><!-- 网页使用的语言 --><html lang="zh-CN"><head> <!-- 指定字符集 --> <meta charset="utf-8"> <!-- 使用Edge最新的浏览器的渲染方式 --> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。 width: 默认宽度与设备的宽度相同 initial-scale: 初始的缩放比，为1:1 --> <meta name="viewport" content="width=device-width, initial-scale=1"> <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ --> <title>用户信息管理系统</title> <!-- 1. 导入CSS的全局样式 --> <link href="css/bootstrap.min.css" rel="stylesheet"> <!-- 2. jQuery导入，建议使用1.9以上的版本 --> <script src="js/jquery-2.1.0.min.js"></script> <!-- 3. 导入bootstrap的js文件 --> <script src="js/bootstrap.min.js"></script> <style type="text/css"> td, th { text-align: center; } </style> <script> function deleteUser(id){ //用户安全提示 if(confirm("您确定要删除吗？")){ //访问路径 location.href="${pageContext.request.contextPath}/delUserServlet?id="+id; } } window.onload = function(){ //给删除选中按钮添加单击事件 document.getElementById("delSelected").onclick = function(){ if(confirm("您确定要删除选中条目吗？")){ var flag = false; //判断是否有选中条目 var cbs = document.getElementsByName("uid"); for (var i = 0; i < cbs.length; i++) { if(cbs[i].checked){//有一个条目选中了flag = true;break; } } if(flag){//有条目被选中 //表单提交 document.getElementById("form").submit(); } } } //1.获取第一个cb document.getElementById("firstCb").onclick = function(){ //2.获取下边列表中所有的cb var cbs = document.getElementsByName("uid"); //3.遍历 for (var i = 0; i < cbs.length; i++) { //4.设置这些cbs[i]的checked状态 = firstCb.checked cbs[i].checked = this.checked; } } } </script></head><body><div class="container"> <h3 style="text-align: center">用户信息列表</h3> <div style="float: left;"> <form class="form-inline" action="${pageContext.request.contextPath}/findUserByPageServlet" method="post"> <div class="form-group"> <label for="exampleInputName2">姓名</label> <input type="text" name="name" value="${condition.name[0]}" class="form-control" id="exampleInputName2" > </div> <div class="form-group"> <label for="exampleInputName3">籍贯</label> <input type="text" name="address" value="${condition.address[0]}" class="form-control" id="exampleInputName3" > </div> <div class="form-group"> <label for="exampleInputEmail2">邮箱</label> <input type="text" name="email" value="${condition.email[0]}" class="form-control" id="exampleInputEmail2" > </div> <button type="submit" class="btn btn-default">查询</button> </form> </div> <div style="float: right;margin: 5px;"> <a class="btn btn-primary" href="${pageContext.request.contextPath}/add.jsp">添加联系人</a> <a class="btn btn-primary" href="javascript:void(0);" id="delSelected">删除选中</a> </div> <form id="form" action="${pageContext.request.contextPath}/delSelectedServlet" method="post"> <table border="1" class="table table-bordered table-hover"> <tr class="success"> <th><input type="checkbox" id="firstCb"></th> <th>编号</th> <th>姓名</th> <th>性别</th> <th>年龄</th> <th>籍贯</th> <th>QQ</th> <th>邮箱</th> <th>操作</th> </tr> <c:forEach items="${pb.list}" var="user" varStatus="s"> <tr> <td><input type="checkbox" name="uid" value="${user.id}"></td> <td>${s.count}</td> <td>${user.name}</td> <td>${user.gender}</td> <td>${user.age}</td> <td>${user.address}</td> <td>${user.qq}</td> <td>${user.email}</td> <td><a class="btn btn-default btn-sm" href="${pageContext.request.contextPath}/findUserServlet?id=${user.id}">修改</a> <a class="btn btn-default btn-sm" href="javascript:deleteUser(${user.id});">删除</a></td> </tr> </c:forEach> </table> </form> <div> <nav aria-label="Page navigation"> <ul class="pagination"> <c:if test="${pb.currentPage == 1}"> <li class="disabled"> </c:if> <c:if test="${pb.currentPage != 1}"> <li> </c:if> <a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${pb.currentPage - 1}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}" aria-label="Previous"> <span aria-hidden="true">«</span> </a> </li> <c:forEach begin="1" end="${pb.totalPage}" var="i" > <c:if test="${pb.currentPage == i}"> <li class="active"><a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${i}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}">${i}</a></li> </c:if> <c:if test="${pb.currentPage != i}"> <li><a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${i}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}">${i}</a></li> </c:if> </c:forEach> <li> <a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${pb.currentPage + 1}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}" aria-label="Next"> <span aria-hidden="true">»</span> </a> </li> <span style="font-size: 25px;margin-left: 5px;"> 共${pb.totalCount}条记录，共${pb.totalPage}页 </span> </ul> </nav> </div></div></body></html>login.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %><!DOCTYPE html><html lang="zh-CN"><head> <meta charset="utf-8"/> <meta http-equiv="X-UA-Compatible" content="IE=edge"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>管理员登录</title> <!-- 1. 导入CSS的全局样式 --> <link href="css/bootstrap.min.css" rel="stylesheet"> <!-- 2. jQuery导入，建议使用1.9以上的版本 --> <script src="js/jquery-2.1.0.min.js"></script> <!-- 3. 导入bootstrap的js文件 --> <script src="js/bootstrap.min.js"></script> <script type="text/javascript"> //切换验证码 function refreshCode(){ //1.获取验证码图片对象 var vcode = document.getElementById("vcode"); //2.设置其src属性，加时间戳 vcode.src = "${pageContext.request.contextPath}/checkCodeServlet?time="+new Date().getTime(); } </script></head><body><div class="container" style="width: 400px;"> <h3 style="text-align: center;">管理员登录</h3> <form action="${pageContext.request.contextPath}/loginServlet" method="post"> <div class="form-group"> <label for="user">用户名：</label> <input type="text" name="username" class="form-control" id="user" placeholder="请输入用户名"/> </div> <div class="form-group"> <label for="password">密码：</label> <input type="password" name="password" class="form-control" id="password" placeholder="请输入密码"/> </div> <div class="form-inline"> <label for="vcode">验证码：</label> <input type="text" name="verifycode" class="form-control" id="verifycode" placeholder="请输入验证码" style="width: 120px;"/> <a href="javascript:refreshCode();"> <img src="${pageContext.request.contextPath}/checkCodeServlet" title="看不清点击刷新" id="vcode"/> </a> </div> <hr/> <div class="form-group" style="text-align: center;"> <input class="btn btn btn-primary" type="submit" value="登录"> </div> </form> <!-- 出错显示的信息框 --> <div class="alert alert-warning alert-dismissible" role="alert"> <button type="button" class="close" data-dismiss="alert" > <span>×</span> </button> <strong>${login_msg}</strong> </div></div></body></html>update.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %><%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><!DOCTYPE html><!-- 网页使用的语言 --><html lang="zh-CN"> <head> <!-- 指定字符集 --> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>修改用户</title> <link href="css/bootstrap.min.css" rel="stylesheet"> <script src="js/jquery-2.1.0.min.js"></script> <script src="js/bootstrap.min.js"></script> </head> <body> <div class="container" style="width: 400px;"> <h3 style="text-align: center;">修改联系人</h3> <form action="${pageContext.request.contextPath}/updateUserServlet" method="post"> <!-- 隐藏域 提交id--> <input type="hidden" name="id" value="${user.id}"> <div class="form-group"> <label for="name">姓名：</label> <input type="text" class="form-control" id="name" name="name" value="${user.name}" readonly="readonly" placeholder="请输入姓名" /> </div> <div class="form-group"> <label>性别：</label><c:if test="${user.gender == '男'}"> <input type="radio" name="gender" value="男" checked />男 <input type="radio" name="gender" value="女" />女</c:if><c:if test="${user.gender == '女'}"> <input type="radio" name="gender" value="男" />男 <input type="radio" name="gender" value="女" checked />女</c:if> </div> <div class="form-group"> <label for="age">年龄：</label> <input type="text" class="form-control" value="${user.age}" id="age" name="age" placeholder="请输入年龄" /> </div> <div class="form-group"> <label for="address">籍贯：</label> <select name="address" id="address" class="form-control" > <c:if test="${user.address == '陕西'}"> <option value="陕西" selected>陕西</option> <option value="北京">北京</option> <option value="上海">上海</option> </c:if> <c:if test="${user.address == '北京'}"><option value="陕西" >陕西</option><option value="北京" selected>北京</option><option value="上海">上海</option> </c:if> <c:if test="${user.address == '上海'}"><option value="陕西" >陕西</option><option value="北京">北京</option><option value="上海" selected>上海</option> </c:if> </select> </div> <div class="form-group"> <label for="qq">QQ：</label> <input type="text" id="qq" class="form-control" value="${user.qq}" name="qq" placeholder="请输入QQ号码"/> </div> <div class="form-group"> <label for="email">Email：</label> <input type="text" id="email" class="form-control" value="${user.email}" name="email" placeholder="请输入邮箱地址"/> </div> <div class="form-group" style="text-align: center"> <input class="btn btn-primary" type="submit" value="提交" /> <input class="btn btn-default" type="reset" value="重置" /> <input class="btn btn-default" type="button" value="返回"/> </div> </form> </div> </body></html>配置文件
druid.properties
driverClassName=com.mysql.jdbc.Driverurl=jdbc:mysql:///day17username=rootpassword=root# 初始化连接数量initialSize=5# 最大连接数maxActive=10# 最大等待时间maxWait=3000数据库
表名为user
实体层（domain）
User
package cn.itcast.domain;public class User { private int id; private String name; private String gender; private int age; private String address; private String qq; private String email; private String username; private String password; 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 getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getGender() { return gender; } public void setGender(String gender) { this.gender = gender; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getQq() { return qq; } public void setQq(String qq) { this.qq = qq; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } @Override public String toString() { return "User{" + "id=" + id + ", name='" + name + '\'' + ", gender='" + gender + '\'' + ", age=" + age + ", address='" + address + '\'' + ", qq='" + qq + '\'' + ", email='" + email + '\'' + ", username='" + username + '\'' + ", password='" + password + '\'' + '}'; }}PageBean
package cn.itcast.domain;import java.util.List;/** * 分页对象 */public class PageBean<T> { private int totalCount; // 总记录数 private int totalPage ; // 总页码 private List<T> list ; // 每页的数据 private int currentPage ; //当前页码 private int rows;//每页显示的记录数 public int getTotalCount() { return totalCount; } public void setTotalCount(int totalCount) { this.totalCount = totalCount; } public int getTotalPage() { return totalPage; } public void setTotalPage(int totalPage) { this.totalPage = totalPage; } public List<T> getList() { return list; } public void setList(List<T> list) { this.list = list; } public int getCurrentPage() { return currentPage; } public void setCurrentPage(int currentPage) { this.currentPage = currentPage; } public int getRows() { return rows; } public void setRows(int rows) { this.rows = rows; } @Override public String toString() { return "PageBean{" + "totalCount=" + totalCount + ", totalPage=" + totalPage + ", list=" + list + ", currentPage=" + currentPage + ", rows=" + rows + '}'; }}