Java(Servlet)模糊查询

1、引用layui框架

<link rel="stylesheet" href="layui/css/layui.css" type="text/css"></link>
<script type="text/javascript" src="layui/layui.js"></script>

2、jsp页面

   <div class="userinfo_top1"><div class="userinfo_zj"><div class="tools" style="margin-top: 0.5%;"><ul class="toolbar" style="margin-left: 1.1%;"><li id="tianjia"><span><img src="data:images/t01.png"/></span>添加</li><li id="bj"><span><img src="data:images/t02.png" /></span>修改</li><li><span></span>用戶名:</li><li><input id="UserMC" name="UserMC" value="${usermc}"></li><li type="button" id="chax"><span><i id="layui-icon" class="layui-icon layui-icon-search"></i></span>查询</li><li id="sxin"><span><i id="layui-icon" class="layui-icon layui-icon-refresh-1"></i></span>刷新</li></ul><ul class="toolbar1" style="margin-right: 0.8%;"><li><span><img src="data:images/t05.png" /></span>设置</li></ul></div></div><div class="userinfo_xm"><table class="layui-hide" id="test" lay-filter="test"></table></div></div>

3、引用layui框架数据表格显示数据

   <script type="text/html" id="barDemo"><a class="layui-btn layui-btn-xs" lay-event="edit" >编辑</a><a class="layui-btn layui-btn-danger layui-btn-xs" lay-event="del" >删除</a></script><script type="text/javascript">layui.use('table', function(){var table = layui.table;var Usermc = $("#UserMC").val();table.render({elem: '#test',url:"servlet/OutStopServlet?fun=selectuserinfo&usermc=" + Usermc,toolbar: '#toolbarDemo',title: '用户数据表',totalRow: true,page: true/*开启分页*/,cols: [[{type: 'checkbox', fixed: 'left',align:'center',hide:true},{field:'userID', title:'ID序号', width:100, fixed: 'left',align:'center',unresize: true, sort: true},{field:'userMC', title:'用户名', width:120, edit: 'text',align:'center', sort: true},{field:'sex', title:'性别', width:115, edit: 'text',align:'center', sort: true},{field:'userType', title:'用户类型', width:150,align:'center', sort: true},{field:'IDcard', title:'身份证', width:280, align:'center', sort: true},{field:'userTypeID',hide:true, title:'用户类型id', width:0,align:'center', sort: true},{field:'password',hide:true, title:'密码', width:0,align:'center', sort: true},{field:'phonenumber', title:'手机号', width:180, edit: 'text',align:'center', sort: true},{field:'site', title:'地址', width:300, edit: 'text',align:'center', sort: true},{field:'remarks', title:'备注', width:198, align:'center', sort: true},{fixed:'right', title:'操作', toolbar: '#barDemo', width:200,align:'center'}]],request: {pageName: 'currentPage' //页码的参数名称，默认：page,limitName: 'pageSize' //每页数据量的参数名，默认：limit},response: {statusName: 'success' //规定数据状态的字段名称，默认：code,statusCode: true //规定成功的状态码，默认：0,countName: 'totalRows' //规定数据总数的字段名称，默认：count,dataName: 'data' //规定数据列表的字段名称，默认：data}});/*刷新*/$("#sxin").click(function () {table.reload("test");});}); /*模糊查询*/$("#chax").click(function(){var UserMC = $("#UserMC").val();window.location.href="servlet/OutStopServlet?fun=selectuser&usermc=" + UserMC;});</script>

4、servlet层接收页面传的数据并且验证数据库的数据

package com.xmg.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.xmg.po.OutStopCheck;
import com.xmg.po.UserPo;
public class OutStopServlet extends HttpServlet {private static final long serialVersionUID = 4403707527738384890L;public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doPost(request, response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {String fun =request.getParameter("fun");if ("list".equals(fun)) {list(request, response);}else if ("selectuserinfo".equals(fun)) {selectuserinfo(request, response);}else if ("selectuser".equals(fun)) {selectuser(request, response);}else{response.sendRedirect("/main/right.jsp");}}/*模糊查询*/public void selectuser(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {/*获取页面传来的值，并且转码*/String name = new String(request.getParameter("usermc").getBytes("iso-8859-1"),"utf-8");request.setAttribute("usermc",name);request.getRequestDispatcher("/jsp/userinfo.jsp").forward(request, response);}/*查询用户信息*/public void selectuserinfo(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {/*获取页面传来的值，并且转码*/String name = new String(request.getParameter("usermc").getBytes("iso-8859-1"),"utf-8");String currentPageStr =request.getParameter("currentPage");String pageSizeStr = request.getParameter("pageSize");int currentPage=1;int pageSize=10;if (currentPageStr !=null && Tools.isNum(currentPageStr)) {currentPage=Integer.parseInt(currentPageStr);}if (pageSizeStr !=null && Tools.isNum(pageSizeStr)) {pageSize=Integer.parseInt(pageSizeStr);}int startIndex =(currentPage-1)*pageSize;IUserService userService =new UserSerivceImpl();Bsgrid<UserPo> checks = userService.selectUser(name, startIndex, pageSize);checks.setSuccess(true);checks.setCurPage(currentPage);JSONObject jsonObject = JSONObject.fromObject(checks);PrintWriter out =response.getWriter();out.write(jsonObject.toString());out.flush();out.close();}}

5、servlet层Bsgrid<UserPo> checks = userService.selectUser(name, startIndex, pageSize);跳转查询数据库的数据，并且返回servlet层在输出到jsp页面接收显示

package com.xmg.dao.impl;
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.xmg.dao.IUserDao;
import com.xmg.po.OutStopCheck;
import com.xmg.po.UserPo;public class UserDaoImpl implements IUserDao {private Connection con =null;private PreparedStatement ps=null;private ResultSet rs= null;private String Count = "SELECT COUNT(*) COUNTo FROM tb_user";private String selectuser="SELECT * FROM tb_user ,tb_usertype WHERE tb_user.UserTypeID=tb_usertype.UserTypeID";/*查询用户信息*/@Overridepublic Bsgrid<UserPo> selectUser(String UserMC,int startIndex,int pageSize) {/*用户信息*/List<UserPo> userpo=new ArrayList<UserPo>();Bsgrid<UserPo> bsgrid = new Bsgrid<UserPo>();bsgrid.setCurPage(startIndex);UserPo useres = null;String str;try {con =DBUtil.getConnection();if (UserMC !=null && !"".equals(UserMC)) {str=" where UserMC like ?";ps=con.prepareStatement(Count +str);/*查询总条数*/ps.setString(1, '%' + UserMC + '%');rs=ps.executeQuery();while (rs.next()) {bsgrid.setTotalRows(rs.getInt("COUNTo"));/*遍历数据*/}str = " and UserMC like ?" + " limit " + startIndex +","+ pageSize;ps=con.prepareStatement(selectuser+str);ps.setString(1, '%' + UserMC + '%');}else {ps=con.prepareStatement(Count);rs=ps.executeQuery();while (rs.next()) {bsgrid.setTotalRows(rs.getInt("COUNTo"));}str =" limit " + startIndex +","+ pageSize;ps=con.prepareStatement(selectuser +str);}rs=ps.executeQuery();userpo=JdbcHelper.getResult(rs, UserPo.class);bsgrid.setData(userpo);} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{DBUtil.close(con, ps, rs);}return bsgrid;}
}

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