spring boot 解决mybatis-spring 1.1到1.2问题

遇到问题如下：

Caused by: java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required
	at org.springframework.util.Assert.notNull(Assert.java:193)
	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:1767)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1704)
	... 68 more

原因：

  mybatis-spring 1.10 类 SqlSessionDaoSupport 中 SqlSessionFactory、SqlSessionTemplate 注入为非必输，

public abstract class SqlSessionDaoSupport extends DaoSupport {
    private SqlSession sqlSession;
    private boolean externalSqlSession;

    public SqlSessionDaoSupport() {
    }

    @Autowired(
        required = false
    )
    public final void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
        if (!this.externalSqlSession) {
            this.sqlSession = new SqlSessionTemplate(sqlSessionFactory);
        }

    }

    @Autowired(
        required = false
    )
    public final void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {
        this.sqlSession = sqlSessionTemplate;
        this.externalSqlSession = true;
    }

    public final SqlSession getSqlSession() {
        return this.sqlSession;
    }

    protected void checkDaoConfig() {
        Assert.notNull(this.sqlSession, "Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required");
    }
}

  mybatis-spring 1.20及更高版本中

public abstract class SqlSessionDaoSupport extends DaoSupport {

  private SqlSession sqlSession;

  private boolean externalSqlSession;

  public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
    if (!this.externalSqlSession) {
      this.sqlSession = new SqlSessionTemplate(sqlSessionFactory);
    }
  }

  public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {
    this.sqlSession = sqlSessionTemplate;
    this.externalSqlSession = true;
  }
    
  public SqlSession getSqlSession() {
    return this.sqlSession;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void checkDaoConfig() {
    notNull(this.sqlSession, "Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required");
  }
}

解决方案：mybatis 注入sqlSessionFactory

package com.example.springboot.common;

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.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import javax.sql.DataSource;

/**
 * 〈解决 mybatis-spring 1.10到1.20的问题〉

 * Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required 问题
 *
 */
@Configuration
public class MybatisInitConfig{

    @Autowired
    private DataSourceProperties dataSourceProperties;

    @Bean
    public SqlSessionFactory sqlSessionFactory() throws Exception {
        DataSource dataSource=dataSourceProperties.initializeDataSourceBuilder().build();
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource);
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        //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:/mapping/*.xml"));
        return sqlSessionFactoryBean.getObject();
    }
}