解决mybatis-spring从1.1升级到1.2所带来问题

解决mybatis-spring从1.1升级到1.2所带来问题

该博客主要针对springboot项目

问题背景

最近在使用项目中遇见如下一个错误：

Caused by: java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required
    at org.springframework.util.Assert.notNull(Assert.java:134)
    at org.mybatis.spring.support.SqlSessionDaoSupport.checkDaoConfig(SqlSessionDaoSupport.java:74)
    at org.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:73)
    at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)
... 39 more

引发该问题的原因是Mybais-Spring包版本过高(1.2以上)引起的，因为1.2以及以上的版本中，对SqlSessionDaoSupport类中的’sqlSessionFactory’或’sqlSessionTemplate’注入方式进行了调整。

解决办法

在Application启动类中添加注解

@ComponentScan(basePackages = {"pers.jarome.init"})

basePackages 的值为扫描指定的包，init包为指定的springboot初始化配置类

Mybatis初始化类

在springboot启动之前注入该类

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import javax.sql.DataSource;

/**
 * @author jarome
 * @date 2017/12/22
 **/
@Configuration
public class MybatisInitConfig {

    @Autowired
    private DataSourceProperties dataSourceProperties;

    @Bean
    public SqlSessionFactory sqlSessionFactoryBean() throws Exception {

        DataSource dataSource = dataSourceProperties.initializeDataSourceBuilder().build();
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource);

        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

        //配置扫描地址
            //关于application.properties中与mybatis有关的配置，需要在此处配置才会生效
        sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath:/mapper/*.xml"));

        return sqlSessionFactoryBean.getObject();
    }
}