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spring boot和mybatis整合分頁外掛

MyBatis提供了攔截器介面,我們可以實現自己的攔截器,將其作為一個plugin裝入到SqlSessionFactory中。 
首先要說的是,Spring在依賴注入bean的時候,會把所有實現MyBatis中Interceptor介面的所有類都注入到SqlSessionFactory中,作為plugin存在。既然如此,我們整合一個plugin便很簡單了,只需要使用@Bean建立PageHelper物件即可。
1、新增pom依賴
<dependency>
    <groupId>com.github.pagehelper</groupId>
    <artifactId>pagehelper</artifactId>
    <version>4.1.0</version>
</dependency>

2、MyBatisConfiguration.java類配置


package com.example.mybatis;

import java.util.Properties;

import javax.sql.DataSource;

import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.session.SqlSessionFactory;
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.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
//加上這個註解,使得支援事務
@EnableTransactionManagement
public class MyBatisConfig implements TransactionManagementConfigurer {
    @Autowired
    private DataSource dataSource;
    
    @Override
    public PlatformTransactionManager annotationDrivenTransactionManager() {
        return new DataSourceTransactionManager(dataSource);
    }
    
    @Bean(name = "sqlSessionFactory")
    public SqlSessionFactory sqlSessionFactoryBean(PageHelper pageHelper) {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);

   //自定義資料庫配置的時候,需要將pageHelper的bean注入到Plugins中,如果採用系統預設的資料庫配置,則只需要定義pageHelper的bean,會自動注入。       

   bean.setPlugins(new Interceptor[] { pageHelper });
        try {
            return bean.getObject();
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }
    }

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


    public PageHelper pageHelper() {
        PageHelper pageHelper = new PageHelper();
        Properties p = new Properties();
        p.setProperty("offsetAsPageNum", "true");
        p.setProperty("rowBoundsWithCount", "true");
        p.setProperty("reasonable", "true");
        p.setProperty("dialect", "mysql");
        pageHelper.setProperties(p);
        return pageHelper;
    }
}

3、分頁查詢測試
    @RequestMapping("/likename")
    public List<Student> likeName(@RequestParam String name){
        PageHelper.startPage(1, 1);
        return stuMapper.likeName(name);
    }