SpringBoot项目：mybatis升级mybatis-plus

1. 替换依赖
2. 修改sqlSessionFactory bean
3. 分页插件不生效问题记录

1.替换依赖：

将原来的mybatis整合springboot的依赖去掉，替换成mybatis-plus

   com.baomidou
   mybatis-plus-boot-starter
   3.5.7

2.修改sqlSessionFactory bean

@Bean("sqlSessionFactory")
public SqlSessionFactory sqlSessionFactory(DataSource dataSource) {
	try {
		//mybatis升级mybatis-plus，需要替换MybatisSqlSessionFactoryBean
		MybatisSqlSessionFactoryBean sqlSessionFactoryBean = new MybatisSqlSessionFactoryBean();
		//SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();//原来mybatis的方式
		sqlSessionFactoryBean.setDataSource(dataSource);
		PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
		org.springframework.core.io.Resource[] resources = resolver.getResources("classpath:/mapper/*.xml");
		org.springframework.core.io.Resource config = resolver.getResource("classpath:mybatis-config.xml");
		sqlSessionFactoryBean.setMapperLocations(resources);
		sqlSessionFactoryBean.setConfigLocation(config);
		return sqlSessionFactoryBean.getObject();
	} catch (Exception e) {
		logger.error("create sqlSessionFactoryBean error", e);
		throw new RuntimeException("create sqlSessionFactoryBean error");
	}
}

3.分页插件不生效问题

3.1配置分页插件：

@Configuration
public class MybatisPlusConfig {

    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL)); // 如果配置多个插件, 切记分页最后添加
        // 如果有多数据源可以不配具体类型, 否则都建议配上具体的 DbType
        return interceptor;
    }
}

3.2 使用分页方法

/**
 * 分页查询用户列表
 */
public List selectUserListByPage(TUserInfo userInfo, Page page) {
	return baseMapper.selectPage(page, new QueryWrapper<>(userInfo)).getRecords();
}

但是他的sql打印并没有带limit，解决方案：手动设置插件

@Bean("sqlSessionFactory")
public SqlSessionFactory sqlSessionFactory(DataSource dataSource, MybatisPlusInterceptor mybatisPlusInterceptor) {
	try {
		//mybatis升级mybatis-plus，需要替换MybatisSqlSessionFactoryBean
		MybatisSqlSessionFactoryBean sqlSessionFactoryBean = new MybatisSqlSessionFactoryBean();
		//SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();//原来mybatis的方式
		sqlSessionFactoryBean.setDataSource(dataSource);
		PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
		org.springframework.core.io.Resource[] resources = resolver.getResources("classpath:/mapper/*.xml");
		org.springframework.core.io.Resource config = resolver.getResource("classpath:mybatis-config.xml");
		sqlSessionFactoryBean.setMapperLocations(resources);
		sqlSessionFactoryBean.setConfigLocation(config);
		//分页未生效效，这里手动设置插件
		Interceptor[] plugins = {mybatisPlusInterceptor};
		sqlSessionFactoryBean.setPlugins(plugins);
		return sqlSessionFactoryBean.getObject();
	} catch (Exception e) {
		logger.error("create sqlSessionFactoryBean error", e);
		throw new RuntimeException("create sqlSessionFactoryBean error");
	}
}