此文章为分页与模糊查询

分页：

创建一个工具类 PageUtils:

package com.xinyi.mydemo.com.xinyi.util;public class PageUtils {//当前页private int currentPage;//上一页private int prevPage;//下一页private int nextPage;//尾页private int lastPage;//数据总条数private int count;//每页条数private int  pageSize;//分页计入数private int pageRecord;//分页private String page;public PageUtils(String currentPage,int count,int pageSize) {init(currentPage, count, pageSize);initPrevPage();initLastPage();initNextPage();initPageRecord();initPage();}//初始化变量的值private void init(String currentPage,int count,int pageSize) {if(currentPage==null||currentPage.equals("")) {currentPage="1";}this.currentPage = Integer.parseInt(currentPage);this.count = count;this.pageSize = pageSize;}//计算上一页private void initPrevPage() {if(currentPage==1) {prevPage = 1;}else {prevPage = currentPage-1;}}//计算最后一页private void initLastPage() {if(count%pageSize==0) {lastPage=count/pageSize;}else {lastPage=count/pageSize+1;}}//计算下一页private void initNextPage() {if(currentPage==lastPage) {nextPage=lastPage;}else {nextPage=currentPage+1;}}//计算计入数private void initPageRecord() {pageRecord = (currentPage-1)*pageSize;}private void initPage() {page = "第"+currentPage+"/"+lastPage+"页，共"+count+"条数据。";page +="<input type='button' value='首页' onclick='page(1)' >";page +="<input type='button' value='上一页' onclick='page("+prevPage+")' >";page +="<input type='button' value='下一页' onclick='page("+nextPage+")' >";page +="<input type='button' value='尾页' onclick='page("+lastPage+")' >";}public int getCurrentPage() {return currentPage;}public int getPrevPage() {return prevPage;}public int getNextPage() {return nextPage;}public int getLastPage() {return lastPage;}public int getCount() {return count;}public int getPageSize() {return pageSize;}public int getPageRecord() {return pageRecord;}public String getPage() {return page;}}

修改controller/StudentController为

package com.xinyi.mydemo.com.xinyi.controller;import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.xinyi.mydemo.com.xinyi.entity.Student;
import com.xinyi.mydemo.com.xinyi.service.StudentService;
import com.xinyi.mydemo.com.xinyi.util.PageUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;@RestController
@RequestMapping("student")
public class StudentController {@Autowiredprivate StudentService studentService;@GetMapping("getStudentAll")public ModelAndView getStudentAll(@RequestParam(defaultValue = "1") String currentPage){ModelAndView mv = new ModelAndView();PageHelper.startPage(Integer.parseInt(currentPage),2);Page<Student> students = studentService.selectStudentWithPage();PageInfo<Student> studentPageInfo = students.toPageInfo();PageUtils pageUtils = new PageUtils(studentPageInfo.getPageNum() + "", (int) studentPageInfo.getTotal(), studentPageInfo.getPageSize());mv.addObject("list",studentPageInfo.getList());mv.addObject("page",pageUtils.getPage());mv.setViewName("selectStudent");return mv;}}

在 selectStudent.ftl

开头页面添加 selectStudent.js

list循环下添加分页：

在static/js目录下创建js文件 selectStudent.js

function page(i) {location.href = "getStudentAll?currentPage="+i;
}

分页完成

模糊查询：

前端：

在 selectStudent.ftl 页面加入input 标签

<tr><td colspan="5">学生名称：<input type="text" value="${sname}"  name="sname"/>老师名称：<input type="text" value="${tname}" name="tname"/><input type="button" class="btn btn-primary" value="查询" onclick="querys()"/></td></tr>

在selectStudent.js中加入querys点击事件

function querys() {var sname = $("[name='sname']").val();var tname = $("[name='tname']").val();location.href = "getStudentAll?sname="+sname+"&tname="+tname;
}

修改selectStudent.js中的page

function page(i) {location.href = "getStudentAll?sname="+$("[name='sname']").val()+"&tname="+$("[name='tname']").val()+"&currentPage="+i;
}

后端：

修改StudentController

package com.xinyi.mydemo.com.xinyi.controller;import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.xinyi.mydemo.com.xinyi.entity.Student;
import com.xinyi.mydemo.com.xinyi.service.StudentService;
import com.xinyi.mydemo.com.xinyi.util.PageUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;@RestController
@RequestMapping("student")
public class StudentController {@Autowiredprivate StudentService studentService;@GetMapping("getStudentAll")public ModelAndView getStudentAll(@RequestParam(defaultValue = "") String sname,@RequestParam(defaultValue = "") String tname,@RequestParam(defaultValue = "1") String currentPage){ModelAndView mv = new ModelAndView();PageHelper.startPage(Integer.parseInt(currentPage),2);Page<Student> students = studentService.selectStudentWithPage(sname,tname);PageInfo<Student> studentPageInfo = students.toPageInfo();PageUtils pageUtils = new PageUtils(studentPageInfo.getPageNum() + "", (int) studentPageInfo.getTotal(), studentPageInfo.getPageSize());mv.addObject("list",studentPageInfo.getList());mv.addObject("page",pageUtils.getPage());mv.addObject("sname",sname);mv.addObject("tname",tname);mv.setViewName("selectStudent");return mv;}}

修改 StudentService 接口

package com.xinyi.mydemo.com.xinyi.service;import com.github.pagehelper.Page;
import com.xinyi.mydemo.com.xinyi.entity.Student;public interface StudentService {Page<Student> selectStudentWithPage(String sname,String tname);
}

修改 StudentImpl

package com.xinyi.mydemo.com.xinyi.service.imp;import com.github.pagehelper.Page;
import com.xinyi.mydemo.com.xinyi.entity.Student;
import com.xinyi.mydemo.com.xinyi.mapper.StudentMapper;
import com.xinyi.mydemo.com.xinyi.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;@Service
public class StudentImpl implements StudentService {@Autowiredprivate StudentMapper studentMapper;@Overridepublic Page<Student> selectStudentWithPage(String sname,String tname) {return studentMapper.selectStudentWithPage(sname,tname);}
}

修改 StudentMapper

package com.xinyi.mydemo.com.xinyi.mapper;import com.github.pagehelper.Page;
import com.xinyi.mydemo.com.xinyi.entity.Student;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;@Mapper   //加入Mapper注解
public interface StudentMapper {Page<Student> selectStudentWithPage(@Param("sname") String sname,@Param("tname") String tname);
}

修改 mapper/StudentMapper.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.xinyi.mydemo.com.xinyi.mapper.StudentMapper"><select id="selectStudentWithPage" resultType="com.xinyi.mydemo.com.xinyi.entity.Student">select s.*,GROUP_CONCAT(t.tname)  as tnamefrom j_student s ,j_teacher t,j_db d where  d.sid = s.sid and d.tid = t.tidGROUP BY s.sidHAVING s.sname like concat('%',#{sname},'%') and tname like concat('%',#{tname},'%')</select></mapper>

运行项目测试：http://localhost:8080/student/getStudentAll

分页与模糊查询完成

有点累了····需要再写

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大白话、最简单——SpringBoot+Mybatis+freemarker整合（二）

此文章为分页与模糊查询

分页：

模糊查询：

前端：

后端：

分页与模糊查询完成

大白话、最简单——SpringBoot+Mybatis+freemarker整合（二）相关推荐

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