如何使用Mybaits调用数据库中的存储过程,下面以Oracle数据库的为例:
1.在数据库中创建以下的存储过程:
create or replace procedure pro_hello(p_user_name in varchar2,p_result out varchar2) is begin p_result := 'hello,' || p_user_name; end; |
2.编写SQL映射文件mapper.xml:
<select id="proHello" statementType="CALLABLE"> <![CDATA[ {call pro_hello (#{p_user_name,mode=IN,jdbcType=VARCHAR},#{result,mode=OUT,jdbcType=VARCHAR})} ]]> </select> |
3.编写JAVA代码调用存储过程
public class ProcedureTest {
public static void main(String[] args) throws IOException { String resource = "mybatis.cfg.xml"; Reader reader = Resources.getResourceAsReader(resource); SqlSessionFactory ssf = new SqlSessionFactoryBuilder().build(reader);
SqlSession session = ssf.openSession();
try { Map<String, String> param = new HashMap<String, String>(); param.put("p_user_name", "zhangsan"); String returnValue = (String) session.selectOne("User.proHello", param); System.out.println("message=" + param.get("p_user_name")); System.out.println("result=" + param.get("result")); System.out.println("returnValue=" + returnValue);
} catch (Exception e) { e.printStackTrace(); } finally { session.close(); } } } |
4.执行Java代码,控制台输出结果如下:
2012-03-07 20:36:32,406 DEBUG [java.sql.PreparedStatement] -==> Executing: {call pro_hello(?,?)} 2012-03-07 20:36:32,406 DEBUG [java.sql.PreparedStatement] -==> Parameters: zhangsan(String) message=zhangsan |