【combobox组件】-002-自动搜寻案例
【combobox组件】-002-自动搜索案例
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;
}
}