springboot + mybatis配置分页插件

1：首先配置springboot +mybatis框架  参考：http://www.cnblogs.com/liyafei/p/7911549.html

2：创建配置类MybatisConfig，对分页插件进行配置。将mybatis-config.xml移动到classpath路径下。

package com.liyafei.util.pagehelper;

import java.util.Properties;

import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.tomcat.jdbc.pool.DataSource;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.TransactionManagementConfigurer;

import com.github.pagehelper.PageHelper;

@Configuration   //添加这个注解相当于配置文件
@EnableTransactionManagement
public class MyBatisConfig implements TransactionManagementConfigurer {
       //MybatisConfig将会映射到classpath下的mybaits-config.xml,功能和xml下面配置类似
    @Autowired
    DataSource dataSource;

    @Bean(name = "sqlSessionFactory")
    public SqlSessionFactory sqlSessionFactoryBean() {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        //分页插件
        PageHelper pageHelper = new PageHelper();
        Properties props = new Properties();
        props.setProperty("reasonable", "true");
        props.setProperty("supportMethodsArguments", "true");
        props.setProperty("returnPageInfo", "check");
        props.setProperty("params", "count=countSql");
        pageHelper.setProperties(props);
        //添加插件
        bean.setPlugins(new Interceptor[]{pageHelper});
        try {
            ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
            bean.setConfigLocation(resolver.getResource("classpath:mybatis-config.xml"));
            return bean.getObject();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    @Bean
    public SqlSessionTemplate sqlSessionTemplate(SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

    @Bean
    @Override
    public PlatformTransactionManager annotationDrivenTransactionManager() {
        return new DataSourceTransactionManager(dataSource);
    }
}

3：在controller中使用分页插件pagehelper,分页插件只能配置一个，不能多用。调用PageHelper.startPage之后下一行（只作用于这一行）的查询结果将会自动调用分页插件
　　

    @RequestMapping("/query/{page}/{pageSize}")
    public PageInfo query(@PathVariable Integer page, @PathVariable Integer pageSize) {
        if(page!= null && pageSize!= null){
            System.out.println("page"+page+"pageSize"+pageSize);
            PageHelper.startPage(page, pageSize);
        }
        List<User> userList = userService.getUserList();

        for(User user:userList){
            System.out.print(user.getId());
            System.out.println(user.getUsername());

        }

        return new PageInfo(userList);
    }

4：测试成功