Mybatis使用篇之七：存储过程调用
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 orreplace 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：
<selectid="proHello" statementType="CALLABLE">
<!
{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
publicclass ProcedureTest {
public static void main(String[]args) throws IOException {
String resource = "mybatis.cfg.xml";
Reader reader =Resources.getResourceAsReader(resource);
SqlSessionFactory ssf = newSqlSessionFactoryBuilder().build(reader);
SqlSession session =ssf.openSession();
try {
Map<String,String> param = new HashMap<String, String>();
param.put("p_user_name","zhangsan");
StringreturnValue = (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：
2012-03-0720:36:32,406 DEBUG -==> Executing: {call pro_hello(?,?)}
2012-03-0720:36:32,406 DEBUG -==> Parameters:zhangsan(String)
message=zhangsan
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