如何使用mybatis调用存储函数

Question

我开始学习Mybatis并搜索了如何处理存储函数。我想知道如何使用 mybatis 调用存储函数。我可以使用这里描述的存储过程http://loianegroner.com/2011/03/ibatis-mybatis-working-with-stored-procedures/

提前致谢。

Answer 1

你的映射器文件应该有这样的东西

<update id="myMappedStatement" parameterType="map" statementType="CALLABLE">
  {#{returnedVal,javaType=String,jdbcType=VARCHAR,mode=OUT} = call myFunc(
       #{myParam1, javaType=String, jdbcType=VARCHAR,
       mode=IN},#{myParam2, javaType=String, jdbcType=VARCHAR,
       mode=IN},#{myParam3, javaType=String, jdbcType=VARCHAR,
       mode=IN})}   
</update>

调用函数应如下所示：

public String myFunction(Map myParams)
{
  //assuming the dao has an Object sqlSessionFactory of type SqlSessionFactory
  SqlSession session = sqlSessionFactory.openSession();
  try
  {
    session.update("myMappedStatement",myParams);
    //now myParams contains an entry with key "returnedVal"
    return (String)myParams.get("returnedVal");   
  }
  catch (Exception ex)
  {

  }finally {
    session.close();
  }
}