oracle存储过程入门

http://www.360doc.com/content/14/0728/16/7662927_397682668.shtml

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：

 

java代码：

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：

 

java代码：

<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

 

java代码：

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：

 

java代码：

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
      
       
      Mapper.xml 配置 Mapper.xml 配置  <resultMap type="emp" id="empMap">  <id property="empno" column="empno"/>  <result property="ename" column="ename"/>  <result property="mgr" column="mgr"/>  <result property="job" column="job"/>  <result property="hiredate" column="hiredate"/>  <result property="sal" column="sal"/>      <result property="comm" column="comm"/>           </resultMap> <!-- 调用存储过程返回结果集 --><select id="getEmps" parameterType="java.util.Map" statementType="CALLABLE">   <![CDATA[call pro_emp(#{emps,mode=OUT,jdbcType=CURSOR,javaType=java.sql.ResultSet,resultMap=empMap})  ]]>    </select> 存储过程：create or replace procedure pro_emp(cur_sys out sys_refcursor)asbegin    open cur_sys for select empno, ename, job, mgr, hiredate, sal, comm, deptno     from tb_emp;   end; IOperation接口里的方法 ：public interface IOperation {void getEmps(Map<String, Object> param);}   测试类：public class Mytest {private SqlSession sqlSession;private IOperation mapper; @Beforepublic void before(){try {SqlSessionFactory factory=MyBatisUtil.getSqlSessionFactory();sqlSession=factory.openSession();mapper=sqlSession.getMapper(IOperation.class);System.out.println("start");} catch (Exception e) {System.out.println(e.getMessage());}}@Testpublic void getEmps(){try {   Map<String, Object> param = new HashMap<String, Object>();       param.put("emps",OracleTypes.CURSOR);       mapper.getEmps(param);               List<Emp> depts =(List<Emp>)param.get("emps");       for (Emp emp : depts) {System.out.println(emp.getEmpno()+" "+emp.getEname());}} catch (Exception e) {System.out.println("getEmp: "+e.getMessage());}}    @After public void after(){ System.out.println("close"); sqlSession.close(); }}   结果：   startDEBUG - Openning JDBC ConnectionDEBUG - Created connection 8344960.DEBUG - ooo Using Connection [oracle.jdbc.driver.T4CConnection@7f5580]DEBUG - ==>  Preparing: call pro_emp(?)DEBUG - ==> Parameters:123 liuzan7369 SMITH7499 ALLEN7521 WARD7566 JONES7654 MARTIN7698 BLAKE7782 CLARK7788 SCOTT7839 KING7844 TURNER7876 ADAMS7900 JAMES7902 FORD7934 MILLERcloseDEBUG - Resetting autocommit to true on JDBC Connection [oracle.jdbc.driver.T4CConnection@7f5580]DEBUG - Closing JDBC Connection [oracle.jdbc.driver.T4CConnection@7f5580]DEBUG - Returned connection 8344960 to pool.

Mapper.xml 配置 Mapper.xml 配置  <resultMap type="emp" id="empMap">  <id property="empno" column="empno"/>  <result property="ename" column="ename"/>  <result property="mgr" column="mgr"/>  <result property="job" column="job"/>  <result property="hiredate" column="hiredate"/>  <result property="sal" column="sal"/>      <result property="comm" column="comm"/>           </resultMap> <!-- 调用存储过程返回结果集 --><select id="getEmps" parameterType="java.util.Map" statementType="CALLABLE">   <![CDATA[call pro_emp(#{emps,mode=OUT,jdbcType=CURSOR,javaType=java.sql.ResultSet,resultMap=empMap})  ]]>    </select> 存储过程：create or replace procedure pro_emp(cur_sys out sys_refcursor)asbegin    open cur_sys for select empno, ename, job, mgr, hiredate, sal, comm, deptno     from tb_emp;   end; IOperation接口里的方法 ：public interface IOperation {void getEmps(Map<String, Object> param);}   测试类：public class Mytest {private SqlSession sqlSession;private IOperation mapper; @Beforepublic void before(){try {SqlSessionFactory factory=MyBatisUtil.getSqlSessionFactory();sqlSession=factory.openSession();mapper=sqlSession.getMapper(IOperation.class);System.out.println("start");} catch (Exception e) {System.out.println(e.getMessage());}}@Testpublic void getEmps(){try {   Map<String, Object> param = new HashMap<String, Object>();       param.put("emps",OracleTypes.CURSOR);       mapper.getEmps(param);               List<Emp> depts =(List<Emp>)param.get("emps");       for (Emp emp : depts) {System.out.println(emp.getEmpno()+" "+emp.getEname());}} catch (Exception e) {System.out.println("getEmp: "+e.getMessage());}}    @After public void after(){ System.out.println("close"); sqlSession.close(); }}   结果：   startDEBUG - Openning JDBC ConnectionDEBUG - Created connection 8344960.DEBUG - ooo Using Connection [oracle.jdbc.driver.T4CConnection@7f5580]DEBUG - ==>  Preparing: call pro_emp(?)DEBUG - ==> Parameters:123 liuzan7369 SMITH7499 ALLEN7521 WARD7566 JONES7654 MARTIN7698 BLAKE7782 CLARK7788 SCOTT7839 KING7844 TURNER7876 ADAMS7900 JAMES7902 FORD7934 MILLERcloseDEBUG - Resetting autocommit to true on JDBC Connection [oracle.jdbc.driver.T4CConnection@7f5580]DEBUG - Closing JDBC Connection [oracle.jdbc.driver.T4CConnection@7f5580]DEBUG - Returned connection 8344960 to pool.
（mybatis 调用存储过程另一种实现）Mybatis默认查询存储过程的返回值是使用参数传来传去的，从参数里获取返回值总让我感觉怪怪的，特别是在使用接口做Dao的时候，破坏了Dao接口方法的统一性。
 然后就有了mybatis-callable，获得方式如下： 
      
      < dependencies >
  ...
    < dependency >
        < groupId >com.github.miemiedev</ groupId >
        < artifactId >mybatis-callable</ artifactId >
        < version >1.0</ version >
    </ dependency >
 ...
</ dependencies > 
          配置是这样的： 
      
      <? xml  version = "1.0"  encoding = "UTF-8" ?>
<! DOCTYPE  configuration
        PUBLIC "-//ibatis.apache.org//DTD Config 3.0//EN"
        "http://ibatis.apache.org/dtd/ibatis-3-config.dtd">
< configuration >
    < plugins >
        < plugin  interceptor = "com.github.miemiedev.mybatis.callable.CallableConvertInterceptor" >        </ plugin >
    </ plugins >
</ configuration > 
        创建一个查询，需要注意的是只有statementType为CALLABLE时拦截器才会起作用： 
      
      < select  id = "query2"  statementType = "CALLABLE" >
    <![CDATA[
        {call test_proc2(
            #{acResult,mode=OUT,jdbcType=CURSOR,javaType=ResultSet, resultMap=hashMap},
            #{userType},
            #{branchCode}
        )}
    ]]>
</ select > 
        然后Dao或许是这样的，接口也是一样的： 
      
      public List< Map <String, Object>> query2(String userType, String branchCode){
    Map< String , Object> params = new HashMap< String , Object>();
    params.put("userType",userType);
    params.put("branchCode",branchCode);
    //存储过程只返回一个游标，则使用selectList返回List
    return getSqlSession().selectList("db.table.user.query2", params);
} 
        =========================================== 返回单个参数但是不是游标的话就这样 
      
      < select  id = "query3"  statementType = "CALLABLE" >
    <![CDATA[
        {call test_proc3(
            #{retCode,mode=OUT,jdbcType=INTEGER},
            #{userType},
            #{branchCode}
        )}
    ]]>
</ select > 
        
      
      public Integer query3(String userType, String branchCode){
    Map< String , Object> params = new HashMap< String , Object>();
    params.put("userType",userType);
    params.put("branchCode",branchCode);
    //存储过程只有一个返回值，并且不是游标，则使用selectOne
    return getSqlSession().selectOne("db.table.user.query3", params);
} 
        =========================================== 返回多个参数，里面啥都有： 
      
      < select  id = "query"  statementType = "CALLABLE" >
    <![CDATA[
        {call test_proc(
            #{retCode,mode=OUT,jdbcType=INTEGER},
            #{acResult,mode=OUT,jdbcType=CURSOR,javaType=ResultSet, resultMap=hashMap},
            #{userType},
            #{branchCode}
        )}
    ]]>
</ select > 
        
      
      public Map< String , Object> query(String userType, String branchCode){
    Map< String , Object> params = new HashMap< String , Object>();
    params.put("userType",userType);
    params.put("branchCode",branchCode);
    //存储过程只有一个返回值，并且不是游标，则使用selectOne
    return getSqlSession().selectOne("db.table.user.query", params);
} 
        Map中包含所有存储过程输出的结果，Key是存储过程的参数名，按需来取就行了。 ============================================= 上面看上去规则有点麻烦，其实用接口做的话就不用考虑是selectList还是selectOne了，直接接收返回值就可以。 ============================================= 自己定义结果集的话参考一下SimpleResultHandler的实现就行了，反正把自己实现的按照下面这么配就行了。不配resultHandler的话默认就是SimpleResultHandler了。 
      
      < plugin  interceptor = "com.github.miemiedev.mybatis.callable.CallableConvertInterceptor" >
    < property  name = "resultHandler"  value = "com.github.miemiedev.mybatis.callable.handler.SimpleResultHandler" />
</ plugin > 
          完。