1、界面展示
2、WebContent/jsp/combobox_002.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <% String root = request.getContextPath(); %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>【combobox组件】-002-自动搜索案例</title> <!-- 引入外部样式 --> <link rel="stylesheet" type="text/css" href="<%=root %>/css/common.css" /> <!-- 引入easyui依赖库 --> <script type="text/javascript" src="<%=root %>/js/jquery-easyui-1.2.6/jquery-1.7.2.min.js"></script> <link rel="stylesheet" type="text/css" href="<%=root %>/js/jquery-easyui-1.2.6/themes/default/easyui.css" /> <link rel="stylesheet" type="text/css" href="<%=root %>/js/jquery-easyui-1.2.6/themes/icon.css" /> <script type="text/javascript" src="<%=root %>/js/jquery-easyui-1.2.6/jquery.easyui.min.js"></script> <script type="text/javascript" src="<%=root %>/js/jquery-easyui-1.2.6/locale/easyui-lang-zh_CN.js"></script> <script type="text/javascript"> $(function() { //自动搜索 $('#search').combobox({ //data:[{id:1 ,val:'男'},{id:2 ,val:'女'}], //自定义列表数据 mode:'remote', //remote表示从服务器加载数据 url:'<%=root%>/UserServlet?method=searchName', //请求地址 valueField:'id', textField:'username', panelHeight:'auto', delay:300 //延迟搜索的时间 }); }); </script> </head> <body> 自动搜索:<input id="search"/> </body> </html>
3、com.easyui.servlet.UserServlet.java
package com.easyui.servlet; import java.io.IOException; import java.util.ArrayList; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import net.sf.json.JSONArray; import net.sf.json.JSONObject; import com.easyui.bean.CityBean; import com.easyui.bean.TUserBean; import com.easyui.dao.UserDao; /** * 用户控制器类 * * @author LiPiaoShui */ public class UserServlet extends HttpServlet { private static final long serialVersionUID = 9140830946116659042L; private UserDao uDao = new UserDao(); protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); String method = request.getParameter("method"); if ("getList".equals(method)) { getList(request, response); } else if("getCityName".equals(method)) { getCityName(request, response); } else if("getCity".equals(method)) { getCity(request, response); } else if("save".equals(method)) { save(request, response); } else if("update".equals(method)) { update(request, response); } else if("delete".equals(method)) { delete(request, response); } else if("searchName".equals(method)) { searchName(request, response); } } /** * 根据名字查询用户信息 * @param request * @param response */ private void searchName(HttpServletRequest request, HttpServletResponse response) { try { //默认前台送过来的是p参数 String q = request.getParameter("q") == null ? "" : request.getParameter("q"); List<TUserBean> uList = this.uDao.searchByName(q.trim()); response.setContentType("text/html;charset=utf-8"); response.getWriter().write(JSONArray.fromObject(uList).toString()); } catch (IOException e) { e.printStackTrace(); } } /** * 删除用户信息 * @param request * @param response */ private void delete(HttpServletRequest request, HttpServletResponse response) { try { String[] ids = request.getParameter("ids").split(","); int count = 0; for(String id:ids) { count += this.uDao.deleteByUserId(Integer.parseInt(id)); } String json = "{\"status\":\"提示信息\",\"message\":\"删除成功,总共删除"+count+"条记录\"}"; if(count <= 0) { json = "{\"status\":\"提示信息\",\"message\":\"删除失败\"}"; } response.setContentType("text/html;charset=utf-8"); response.getWriter().write(json); } catch (IOException e) { e.printStackTrace(); } } /** * 修改用户信息 * @param request * @param response */ private void update(HttpServletRequest request, HttpServletResponse response) { int id = Integer.parseInt(request.getParameter("id")); TUserBean user = new TUserBean(); user = this.uDao.queryUserById(id); //获取前台传入的信息 String username = request.getParameter("username"); String password = request.getParameter("password"); String sex = request.getParameter("sex"); int age = Integer.parseInt(request.getParameter("age")); String birthday = request.getParameter("birthday"); int city = Integer.parseInt(request.getParameter("city")); String salary = request.getParameter("salary"); String starttime = request.getParameter("starttime"); String endtime = request.getParameter("endtime"); String description = request.getParameter("description"); //设置用户信息 user.setUsername(username); user.setPassword(password); user.setSex(sex); user.setAge(age); user.setBirthday(birthday); user.setCity(city); user.setSalary(salary); user.setStarttime(starttime); user.setEndtime(endtime); user.setDescription(description); try { //更新用户信息 int count = uDao.update(user); String json = "{\"status\":\"提示信息\",\"message\":\"更新成功\"}"; if(count != 1) { json = "{\"status\":\"提示信息\",\"message\":\"更新失败\"}"; } response.setContentType("text/html;charset=utf-8"); response.getWriter().write(json); } catch (IOException e) { e.printStackTrace(); } } /** * 保存用户信息 * @param request * @param response */ private void save(HttpServletRequest request, HttpServletResponse response) { //获取前台传入的信息 String username = request.getParameter("username"); String password = request.getParameter("password"); String sex = request.getParameter("sex"); int age = Integer.parseInt(request.getParameter("age")); String birthday = request.getParameter("birthday"); int city = Integer.parseInt(request.getParameter("city")); String salary = request.getParameter("salary"); String starttime = request.getParameter("starttime"); String endtime = request.getParameter("endtime"); String description = request.getParameter("description"); //设置用户信息 TUserBean user = new TUserBean(); user.setUsername(username); user.setPassword(password); user.setSex(sex); user.setAge(age); user.setBirthday(birthday); user.setCity(city); user.setSalary(salary); user.setStarttime(starttime); user.setEndtime(endtime); user.setDescription(description); try { //保存用户信息 int count = uDao.save(user); String json = "{\"status\":\"提示信息\",\"message\":\"保存成功\"}"; if(count != 1) { json = "{\"status\":\"提示信息\",\"message\":\"保存失败\"}"; } response.setContentType("text/html;charset=utf-8"); response.getWriter().write(json); } catch (IOException e) { e.printStackTrace(); } } /** * 获取全部城市信息 * @param request * @param response */ private void getCity(HttpServletRequest request, HttpServletResponse response) { try { List<CityBean> cList = new ArrayList<CityBean>(); cList.add(new CityBean(1,"北京")); cList.add(new CityBean(2,"上海")); cList.add(new CityBean(3,"深圳")); cList.add(new CityBean(4,"长春")); response.setContentType("text/html;charset=utf-8"); //[{"id":1,"name":"北京"},{"id":2,"name":"上海"},{"id":3,"name":"深圳"},{"id":4,"name":"长春"}] response.getWriter().write(JSONArray.fromObject(cList).toString()); } catch (IOException e) { e.printStackTrace(); } } /** * 获取城市信息 * @param request * @param response */ private void getCityName(HttpServletRequest request, HttpServletResponse response) { try { List<CityBean> cList = new ArrayList<CityBean>(); cList.add(new CityBean(1,"北京")); cList.add(new CityBean(2,"上海")); cList.add(new CityBean(3,"深圳")); cList.add(new CityBean(4,"长春")); int id = Integer.parseInt(request.getParameter("id")); for(CityBean city:cList) { if(id == city.getId()) { response.setContentType("text/html;charset=utf-8"); response.getWriter().write(JSONObject.fromObject(city).toString()); } } } catch (IOException e) { e.printStackTrace(); } } /** * 获取全部用户信息 * * @param request * @param response */ private void getList(HttpServletRequest request, HttpServletResponse response) { try { //当前页码 int currentPage = Integer.parseInt(request.getParameter("page")); //每页显示的大小 int pageSize = Integer.parseInt(request.getParameter("rows")); //前台查询条件 String username = request.getParameter("username") == null ? "" : request.getParameter("username"); String starttime = request.getParameter("starttime") == null ? "" : request.getParameter("starttime"); String endtime = request.getParameter("endtime") == null ? "" : request.getParameter("endtime"); TUserBean user = new TUserBean(); user.setUsername(username); user.setStarttime(starttime); user.setEndtime(endtime); // 获取分页显示的用户信息 List<TUserBean> uList = uDao.queryByPagination(currentPage, pageSize, user); //获取总用户数 int total = uDao.getTotal(user); // json格式 --> {"total":10,"rows":[{},{}]} String json = "{\"total\":" + total + ",\"rows\":" + JSONArray.fromObject(uList).toString() + "}"; response.setContentType("text/html;charset=utf-8"); response.getWriter().write(json); } catch (Exception e) { e.printStackTrace(); } } }
4、com.easyui.dao.UserDao.java
package com.easyui.dao; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; import com.easyui.bean.TUserBean; import com.easyui.util.DBUtil; /** * 用户数据库操作类 * @author LiPiaoShui */ public class UserDao { /** * 获取全部用户信息 * @return */ public List<TUserBean> getList() { Connection conn = null; PreparedStatement pstmt = null; ResultSet rs = null; List<TUserBean> uList = new ArrayList<TUserBean>(); try { String sql = "select * from t_user"; conn = DBUtil.getConnection(); pstmt = conn.prepareStatement(sql); rs = pstmt.executeQuery(); while(rs.next()) { TUserBean user = new TUserBean(); user.setId(rs.getInt("id")); user.setUsername(rs.getString("username")); user.setPassword(rs.getString("password")); user.setSex(rs.getString("sex")); user.setAge(rs.getInt("age")); user.setBirthday(rs.getString("birthday")); user.setCity(rs.getInt("city")); user.setSalary(rs.getString("salary")); user.setStarttime(rs.getString("starttime")); user.setEndtime(rs.getString("endtime")); user.setDescription(rs.getString("description")); uList.add(user); } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs, pstmt, conn); } return uList; } /** * 分页显示用户信息 * @param currentPage * @param pageSize * @return */ public List<TUserBean> queryByPagination(int currentPage,int pageSize, TUserBean userBean) { Connection conn = null; PreparedStatement pstmt = null; ResultSet rs = null; List<TUserBean> uList = new ArrayList<TUserBean>(); try { String sql = "select * from t_user where 1=1"; if(!"".equals(userBean.getUsername().trim())) { sql += " and username like '%" + userBean.getUsername() + "%'"; } if(!"".equals(userBean.getStarttime().trim())) { sql += " and starttime >= '" + userBean.getStarttime() + "'"; } if(!"".equals(userBean.getEndtime().trim())) { sql += " and endtime >= '" + userBean.getEndtime() + "'"; } sql += " limit ?,?"; conn = DBUtil.getConnection(); pstmt = conn.prepareStatement(sql); pstmt.setInt(1, (currentPage-1)*pageSize); pstmt.setInt(2, pageSize); rs = pstmt.executeQuery(); while(rs.next()) { TUserBean user = new TUserBean(); user.setId(rs.getInt("id")); user.setUsername(rs.getString("username")); user.setPassword(rs.getString("password")); user.setSex(rs.getString("sex")); user.setAge(rs.getInt("age")); user.setBirthday(rs.getString("birthday")); user.setCity(rs.getInt("city")); user.setSalary(rs.getString("salary")); user.setStarttime(rs.getString("starttime")); user.setEndtime(rs.getString("endtime")); user.setDescription(rs.getString("description")); uList.add(user); } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs, pstmt, conn); } return uList; } /** * 获取总用户数 * @return */ public int getTotal(TUserBean userBean) { Connection conn = null; PreparedStatement pstmt = null; ResultSet rs = null; int total = 0; try { String sql = "select count(1) from t_user where 1=1"; if(!"".equals(userBean.getUsername().trim())) { sql += " and username like '%" + userBean.getUsername() + "%'"; } if(!"".equals(userBean.getStarttime().trim())) { sql += " and starttime >= '" + userBean.getStarttime() + "'"; } if(!"".equals(userBean.getEndtime().trim())) { sql += " and endtime >= '" + userBean.getEndtime() + "'"; } conn = DBUtil.getConnection(); pstmt = conn.prepareStatement(sql); rs = pstmt.executeQuery(); if(rs.next()) { total = rs.getInt(1); } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs, pstmt, conn); } return total; } /** * 保存用户信息 * @param user * @return */ public int save(TUserBean user) { Connection conn = null; PreparedStatement pstmt = null; int count = 0; try { String sql = "insert into t_user(username,password,sex,age,birthday,city," + "salary,starttime,endtime,description) value(?,?,?,?,?,?,?,?,?,?)"; conn = DBUtil.getConnection(); pstmt = conn.prepareStatement(sql); pstmt.setString(1, user.getUsername()); pstmt.setString(2, user.getPassword()); pstmt.setString(3, user.getSex()); pstmt.setInt(4, user.getAge()); pstmt.setString(5, user.getBirthday()); pstmt.setInt(6, user.getCity()); pstmt.setString(7, user.getSalary()); pstmt.setString(8, user.getStarttime()); pstmt.setString(9, user.getEndtime()); pstmt.setString(10, user.getDescription()); count = pstmt.executeUpdate(); } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(null, pstmt, conn); } return count; } /** * 根据用户ID查询用户信息 * @param id * @return */ public TUserBean queryUserById(int id) { Connection conn = null; PreparedStatement pstmt = null; ResultSet rs = null; TUserBean user = new TUserBean(); try { String sql = "select * from t_user where id=?"; conn = DBUtil.getConnection(); pstmt = conn.prepareStatement(sql); pstmt.setInt(1, id); rs = pstmt.executeQuery(); if(rs.next()) { user.setId(rs.getInt("id")); user.setUsername(rs.getString("username")); user.setPassword(rs.getString("password")); user.setSex(rs.getString("sex")); user.setAge(rs.getInt("age")); user.setBirthday(rs.getString("birthday")); user.setCity(rs.getInt("city")); user.setSalary(rs.getString("salary")); user.setStarttime(rs.getString("starttime")); user.setEndtime(rs.getString("endtime")); user.setDescription(rs.getString("description")); } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs, pstmt, conn); } return user; } /** * 更新用户信息 * @param user * @return */ public int update(TUserBean user) { Connection conn = null; PreparedStatement pstmt = null; int count = 0; try { String sql = "update t_user set username=?,password=?,sex=?,age=?,birthday=?,city=?," + "salary=?,starttime=?,endtime=?,description=? where id=?"; conn = DBUtil.getConnection(); pstmt = conn.prepareStatement(sql); pstmt.setString(1, user.getUsername()); pstmt.setString(2, user.getPassword()); pstmt.setString(3, user.getSex()); pstmt.setInt(4, user.getAge()); pstmt.setString(5, user.getBirthday()); pstmt.setInt(6, user.getCity()); pstmt.setString(7, user.getSalary()); pstmt.setString(8, user.getStarttime()); pstmt.setString(9, user.getEndtime()); pstmt.setString(10, user.getDescription()); pstmt.setInt(11, user.getId()); count = pstmt.executeUpdate(); } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(null, pstmt, conn); } return count; } /** * 根据用户ID删除用户信息 * @param id * @return */ public int deleteByUserId(int id) { Connection conn = null; PreparedStatement pstmt = null; int count = 0; try { String sql = "delete from t_user where id=?"; conn = DBUtil.getConnection(); pstmt = conn.prepareStatement(sql); pstmt.setInt(1, id); count = pstmt.executeUpdate(); } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(null, pstmt, conn); } return count; } /** * 根据名字查询用户信息 * @return */ public List<TUserBean> searchByName(String q) { Connection conn = null; PreparedStatement pstmt = null; ResultSet rs = null; List<TUserBean> uList = new ArrayList<TUserBean>(); try { String sql = "select * from t_user where 1=1"; if(!"".equals(q)) { sql += " and username like '%" + q + "%'"; } conn = DBUtil.getConnection(); pstmt = conn.prepareStatement(sql); rs = pstmt.executeQuery(); while(rs.next()) { TUserBean user = new TUserBean(); user.setId(rs.getInt("id")); user.setUsername(rs.getString("username")); user.setPassword(rs.getString("password")); user.setSex(rs.getString("sex")); user.setAge(rs.getInt("age")); user.setBirthday(rs.getString("birthday")); user.setCity(rs.getInt("city")); user.setSalary(rs.getString("salary")); user.setStarttime(rs.getString("starttime")); user.setEndtime(rs.getString("endtime")); user.setDescription(rs.getString("description")); uList.add(user); } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs, pstmt, conn); } return uList; } }
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