多条件查询与分页:
通过页面的houseName、floorage获取值传到前端视图（HouseSearchVO）实体类中的houseName，floorage建立houseSearchVO对象。
通过controller控制层getHouseSearch方法得到houseName，floorage的值 存在哪个就将此值传到后端（HouseSearch）实体类中建立houseSearch对象。
list.jsp: HouseSearchVO:
HouseController:
此时返回一个houseSearch对象。通过HouseService中的search方法调用HouseDAO中的查询，此时传到HouseDAO.xml调用sql语句
HouseService: HouseDAO:
HouseDAO.xml:
分页插件:
页面显示：
升级版：
将页面查询时添加的条件 用HouseSearchVO对象保存，再将此对象保存到@ModelAttribute（“vo”）vo对象中返回给页面。
此时，页面就能拿到vo对象，然后通过vo对象的属性来将条件重新显示
最后将下一页修改成点击事件，将页码和表单一起提交。
HouseController
jsp：
源码：
mybatis-config.xml
1 <!--插件 分页--> 2 <plugins> 3 <plugin interceptor="com.github.pagehelper.PageHelper"> 4 <property name="dialect" value="mysql"></property> 5 </plugin> 6 </plugins>
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > 3 <mapper namespace="com.etc.dao.HouseDAO"> 4 <insert id="add"> 5 INSERT INTO `t_house` ( 6 `h_name`, 7 `h_rect`, 8 `h_date`, 9 `h_loc1`, 10 `h_loc2`, 11 `h_img`, 12 `h_userId` 13 ) 14 VALUES 15 ( 16 #{hName}, 17 #{hRect}, 18 #{hDate}, 19 #{hLoc1}, 20 #{hLoc2}, 21 #{hImg}, 22 #{userId} 23 ); 24 </insert> 25 26 <select id="serach" resultType="house"> 27 SELECT * from `t_house` 28 <where> 29 <if test="houseName!=null"> 30 h_name like '%${houseName}%' 31 </if> 32 <if test="minRect!=null and maxRect!=null"> 33 and h_rect between #{minRect} and #{maxRect} 34 </if> 35 </where> 36 37 </select> 38 39 </mapper>
1 package com.etc.controller; 2 3 import com.etc.Vo.HouseSearchVO; 4 import com.etc.Vo.HouseVO; 5 import com.etc.common.Constant; 6 import com.etc.converter.HouseConverter; 7 import com.etc.entity.House; 8 import com.etc.entity.HouseSearch; 9 import com.etc.entity.User; 10 import com.etc.servise.HouseService; 11 import com.github.pagehelper.PageHelper; 12 import com.github.pagehelper.PageInfo; 13 import org.apache.commons.io.IOUtils; 14 import org.springframework.beans.factory.annotation.Autowired; 15 import org.springframework.stereotype.Controller; 16 import org.springframework.ui.Model; 17 import org.springframework.util.StringUtils; 18 import org.springframework.web.bind.annotation.ModelAttribute; 19 import org.springframework.web.bind.annotation.RequestMapping; 20 21 import javax.servlet.http.HttpServletResponse; 22 import javax.servlet.http.HttpSession; 23 import java.io.File; 24 import java.io.FileInputStream; 25 import java.io.IOException; 26 import java.util.List; 27 28 @Controller 29 @RequestMapping("/house") 30 public class HouseController { 31 32 public static final String UPLOAD_DIR = "D:\images\"; 33 34 @RequestMapping("/images") 35 public String images(String imgName, HttpServletResponse response) throws IOException { 36 //将图片的输入流，复制到response的输出流中， 37 IOUtils.copy(new FileInputStream(UPLOAD_DIR+imgName),response.getOutputStream()); 38 return null; 39 } 40 41 42 @Autowired 43 private HouseService houseService; 44 45 @RequestMapping("/add") 46 public String add(HouseVO houseVO, HttpSession session) throws IOException { 47 //获取session中的user对象 48 User user = (User) session.getAttribute("user"); 49 //拿到user对象的id 50 int userId = user.getUserId(); 51 //设置文件上传的路径 52 houseVO.getHImg().transferTo(new File(UPLOAD_DIR + houseVO.getHImg().getOriginalFilename())); 53 //建立house对象 54 House house = HouseConverter.convert(houseVO, houseVO.getHImg().getOriginalFilename(), userId); 55 //调用添加方法 56 houseService.add(house); 57 return "list"; 58 } 59 60 @RequestMapping("/serach") 61 public String serach(@ModelAttribute("vo") HouseSearchVO houseSearchVO, Model model, Integer pageNum) { 62 63 HouseSearch houseSearch = getHouseSearch(houseSearchVO); 64 65 if (pageNum == null) { 66 pageNum = 1; 67 } 68 69 PageHelper.startPage(pageNum, Constant.PAGE_SIZE); 70 List<House> serach = houseService.serach(houseSearch); 71 PageInfo<House> pageInfo = new PageInfo<>(serach); 72 73 model.addAttribute("pageInfo", pageInfo); 74 return "list"; 75 } 76 77 private HouseSearch getHouseSearch(HouseSearchVO houseSearchVO) { 78 HouseSearch houseSearch = new HouseSearch(); 79 if (!StringUtils.isEmpty(houseSearchVO.getHouseName())) { 80 houseSearch.setHouseName(houseSearchVO.getHouseName()); 81 } 82 if (!StringUtils.isEmpty(houseSearchVO.getFloorage())) { 83 String[] split = houseSearchVO.getFloorage().split("-"); 84 houseSearch.setMinRect(Double.valueOf(split[0])); 85 houseSearch.setMaxRect(Double.valueOf(split[1])); 86 } 87 return houseSearch; 88 } 89 90 }
1 package com.etc.servise; 2 3 import com.etc.entity.HouseSearch; 4 import com.etc.dao.HouseDAO; 5 import com.etc.entity.House; 6 import org.springframework.beans.factory.annotation.Autowired; 7 import org.springframework.stereotype.Service; 8 9 import java.util.List; 10 11 @Service 12 public class HouseService { 13 14 @Autowired 15 private HouseDAO houseDAO; 16 17 public void add(House house){ 18 houseDAO.add(house); 19 } 20 21 public List<House> serach(HouseSearch houseSearch){ 22 List<House> serach = houseDAO.serach(houseSearch); 23 return serach; 24 } 25 26 }
1 package com.etc.dao; 2 3 import com.etc.entity.HouseSearch; 4 import com.etc.entity.House; 5 6 import java.util.List; 7 8 public interface HouseDAO { 9 10 void add(House house); 11 12 List<House> serach(HouseSearch houseSearch); 13 }
1 package com.etc.Vo; 2 3 import lombok.AllArgsConstructor; 4 import lombok.Data; 5 import lombok.NoArgsConstructor; 6 7 @Data 8 @AllArgsConstructor 9 @NoArgsConstructor 10 public class HouseSearchVO { 11 private String houseName; 12 private String floorage; 13 }
1 package com.etc.entity; 2 3 import lombok.AllArgsConstructor; 4 import lombok.Data; 5 import lombok.NoArgsConstructor; 6 7 @Data 8 @AllArgsConstructor 9 @NoArgsConstructor 10 public class HouseSearch { 11 private String houseName; 12 private Double minRect; 13 private Double maxRect; 14 15 }
1 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 2 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd"> 3 <!-- saved from url=(0030)http://localhost:8080/House-2/ --> 4 <HTML xmlns="http://www.w3.org/1999/xhtml"><HEAD><TITLE>布谷租房 - 首页</TITLE> 5 <META content="text/html; charset=utf-8" http-equiv=Content-Type> 6 <LINK rel=stylesheet type=text/css href="../css/style.css"> 7 <META name=GENERATOR content="MSHTML 8.00.7601.17514"></HEAD> 8 <BODY> 9 <DIV id=header class=wrap> 10 <DIV id=logo><IMG src="../images/logo.gif"></DIV></DIV> 11 <DIV id=navbar class=wrap> 12 <DL class="search clearfix"> 13 <FORM id=sform method=post action=/house/serach> 14 <input type="hidden" id="pageNum" name="pageNum"> 15 <DT> 16 <UL> 17 <LI class=bold>房屋信息</LI> 18 <LI>标题：<INPUT class=text type=text name=houseName value="${vo.houseName}"> <LABEL class=ui-blue> 19 <INPUT value=搜索房屋 type=submit name=search></LABEL> 20 </LI></UL></DT> 21 <DD> 22 <UL> 23 <LI class=first>面积 </LI> 24 <LI><SELECT name=floorage> <OPTION ${vo.floorage==""?"selected":""} selected value="">不限</OPTION> <OPTION 25 value=0-40 ${vo.floorage=="0-40"?"selected":""}>40以下</OPTION> <OPTION value=40-500 ${vo.floorage=="40-500"?"selected":""}>40-500</OPTION> <OPTION 26 value=500-1000000 ${vo.floorage=="500-1000000"?"selected":""}>500以上</OPTION></SELECT> </LI></UL></DD> 27 <DD> 28 <UL> 29 <LI class=first>价格 </LI> 30 <LI><SELECT name=price> <OPTION selected value="">不限</OPTION> <OPTION 31 value=0-100 >100元以下</OPTION> <OPTION value=100-200 >100元—200元</OPTION> 32 <OPTION value=200-1000000 >200元以上</OPTION></SELECT> </LI></UL></DD> 33 <DD> 34 <UL> 35 <LI class=first>房屋位置</LI> 36 <LI><SELECT id=street name=street_id> <OPTION selected 37 value="">不限</OPTION> <OPTION value=1000>知春路</OPTION> <OPTION 38 value=1001>中关村大街</OPTION> <OPTION value=1002>学院路</OPTION> <OPTION 39 value=1003>朝阳路</OPTION></SELECT> </LI></UL></DD> 40 <DD> 41 <UL> 42 <LI class=first>房型</LI> 43 <LI><SELECT name=type_id> <OPTION selected value="">不限</OPTION> <OPTION 44 value=1000>一室一厅</OPTION> <OPTION value=1001>一室两厅</OPTION> <OPTION 45 value=1002>两室一厅</OPTION> <OPTION value=1003>两室两厅</OPTION></SELECT> 46 </LI></UL></DD> 47 </FORM></DL></DIV> 48 <DIV class="main wrap"> 49 <TABLE class=house-list> 50 <TBODY> 51 <c:forEach items="${pageInfo.list}" var="house"> 52 <TR> 53 <TD class=house-thumb><span><A href="../../details.jsp" target="_blank"><img src="/house/images?imgName=${house.HImg}" width="100" height="75" alt=""></a></span></TD> 54 <TD> 55 <DL> 56 <DT><A href="../../details.jsp" target="_blank">${house.HName}</A></DT> 57 <DD>${house.HLoc1}${house.HLoc2},${house.HRect}平米<BR>联系方式：3456 </DD></DL></TD> 58 <TD class=house-type>一室一厅</TD> 59 <TD class=house-price><SPAN>346.0</SPAN>元/月</TD></TR> 60 </c:forEach> 61 </TBODY></TABLE> 62 <DIV class=pager> 63 <UL> 64 <LI class=current><A href="javascript:void(0)" onclick="form(${pageInfo.firstPage})">首页</A></LI> 65 <LI><A href="javascript:void(0)" onclick="form(${pageInfo.hasPreviousPage?pageInfo.prePage:pageInfo.pageNum})">上一页</A></LI> 66 <LI><A href="javascript:void(0)" onclick="form(${pageInfo.hasNextPage?pageInfo.nextPage:pageInfo.pageNum})">下一页</A></LI> 67 <LI><A href="javascript:void(0)" onclick="form(${pageInfo.lastPage})">末页</A></LI></UL><SPAN 68 class=total>${pageInfo.pageNum}/${pageInfo.pages}页</SPAN> </DIV></DIV> 69 <DIV id=footer class=wrap> 70 <DL> 71 <DT>布谷租房 © 2010 布谷租房 京ICP证1000001号</DT> 72 <DD>关于我们 · 联系方式 · 意见反馈 · 帮助中心</DD></DL></DIV></BODY><script> 73 function form(pageNum){ 74 var page=document.getElementById("pageNum"); 75 page.value=pageNum; 76 var form=document.getElementById("sform"); 77 form.submit(); 78 } 79 80 </script></HTML>