mybaties分页

首先引入jar包：

     <dependency>
        <groupId>com.github.pagehelper</groupId>
        <artifactId>pagehelper</artifactId>
    </dependency>

然后在mybatis配置文件中配置：

SqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <plugins>
        <!-- com.github.pagehelper 为 PageHelper 类所在包名 -->
        <plugin interceptor="com.github.pagehelper.PageHelper">
            <!-- 设置数据库类型 Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL 六种数据库-->
            <property name="dialect" value="mysql"/>
        </plugin>
    </plugins>
</configuration>

代码中使用：

Service

package com.pinyougou.sellergoods.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import com.alibaba.dubbo.config.annotation.Service;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.pinyougou.mapper.TbBrandMapper;
import com.pinyougou.pojo.TbBrand;
import com.pinyougou.sellergoods.service.BrandService;

import entity.PageResult;

@Service
public class BrandServiceImpl implements BrandService {

    @Autowired
    private TbBrandMapper brandMapper;

    @Override
    public PageResult findPage(int pageNum, int pageSize) {
        //声明下面的查询要使用分页插件
        PageHelper.startPage(pageNum, pageSize);
        //查询方法一：直接将查询结果强转成 page对象
        Page<TbBrand> page = (Page<TbBrand>) brandMapper.selectByExample(null);
        return new PageResult(page.getTotal(), page.getResult()); 

        //查询方法二：将查询结果封装成pageInfo对象
//        List<TbBrand> list = brandMapper.selectByExample(null);
//        PageInfo<TbBrand> pageInfo = new PageInfo<>(list);
//        return new PageResult(pageInfo.getTotal(), pageInfo.getList());
    }

}

Controller:

package com.pinyougou.manager.controller;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.alibaba.dubbo.config.annotation.Reference;
import com.pinyougou.pojo.TbBrand;
import com.pinyougou.sellergoods.service.BrandService;

import entity.PageResult;

@RestController
@RequestMapping("/brand")
public class BrandController {

    @Reference
    private BrandService brandService;

    /**
     *<p>Description: 分页查询<p>
     * @date 2018年11月19日
     * @param page 当前页码
     * @param size    每页记录条数
     * @return
     */
    @RequestMapping("/findPage")
    public PageResult findPage(int page,int size) {
        return brandService.findPage(page,size);
    }

测试：