mybatis 嵌套的结果集不能被安全的转为自定义ResultHandler 的解决办法

mybatis 嵌套的结果集不能被安全的转为自定义ResultHandler 的解决办法

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.executor.ExecutorException: Mapped Statements with nested result mappings cannot be safely used with a custom ResultHandler. Use safeResultHandlerEnabled=false setting to bypass this check.

 

问题描述

  session.select("dao.ArticleMapper.selectAll", null, new RowBounds(1, 2),resultHandler);

 会报不安全, 查询Configuration 源码发现里面有一个常量是

public Configuration() {
    this.safeRowBoundsEnabled = false;
    this.safeResultHandlerEnabled = true;//意思是不允许自定义ResultHand 处理器, 
    this.mapUnderscoreToCamelCase = false;
    this.aggressiveLazyLoading = true;

解决办法

   public static SqlSession getsqlSession(){
    SqlSession session = sqlSessionFactory.openSession(ExecutorType.REUSE);
    Configuration configuration = session.getConfiguration(); //反射得到configuration ,然后
    configuration.setSafeResultHandlerEnabled(false); // 设置为false
    return  session;
}

这样就可以了