Java调用Oracle存储过程返回结果集

时间:2022-12-08 04:28:45

一:无返回值的存储过程调用

存储过程:  

CREATE OR REPLACE PROCEDURE PRO_1(PARA1 IN VARCHAR2,PARA2 IN VARCHAR2)   AS      

BEGIN      

    INSERT INTO DBO.EMP (ID,NAME) VALUES (PARA1, PARA2);   

END PRO_1;   

Java代码:   

package com.icesoft.service;

import java.sql.*;
import java.sql.ResultSet;

public class CallProcedureTest1 {

public CallProcedureTest1() {
   super();
}

public static void main(String[] args) {

   String driver = "oracle.jdbc.driver.OracleDriver";
   String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl ";
   String user = "admin";
   String pwd = "password";

   Connection conn = null;
   CallableStatement cs = null;
   ResultSet rs = null;

   try {
    Class.forName(driver);
    conn = DriverManager.getConnection(url, user, pwd);
    cs = conn.prepareCall("{ call DBO.PRO_1(?,?) }");
    cs.setString(1, "10");
    cs.setString(2, "Peter");
    cs.execute();
   } catch (SQLException e) {
    e.printStackTrace();
   } catch (Exception e) {
    e.printStackTrace();
   } finally {
    try {
     if (rs != null) {
      rs.close();
     }
     if (cs != null) {
      cs.close();
     }
     if (conn != null) {
      conn.close();
     }
    } catch (SQLException e) {
    }
   }
  
}

}

备注,存储过程PRO_1中用到了表EMP(ID, NAME),需事先建好

二:有返回值的存储过程(非结果集)   

存储过程:   

CREATE OR REPLACE PROCEDURE PRO_2(PARA1 IN VARCHAR2,PARA2 OUT VARCHAR2)   AS   

BEGIN    

    SELECT INTO PARA2 FROM EMP WHERE ID= PARA1;    

END PRO_2;   

Java代码:   

package com.icesoft.service;

import java.sql.*;

public class CallProcedureTest2 {

public CallProcedureTest2() {
   super();
}

public static void main(String[] args) {

   String driver = "oracle.jdbc.driver.OracleDriver";
   String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
   String user = "admin";
   String pwd = "password";
   Connection conn = null;
   CallableStatement cs = null;
   ResultSet rs = null;

   try {
    Class.forName(driver);
    conn = DriverManager.getConnection(url, user, pwd);
    cs = conn.prepareCall("{ call DBO.PRO_2(?,?) }");
    cs.setString(1, "10");
    cs.registerOutParameter(2, Types.VARCHAR);
    cs.execute();

    String name = cs.getString(2);
    System.out.println("name: " + name);
   } catch (SQLException e) {
    e.printStackTrace();
   } catch (Exception e) {
    e.printStackTrace();
   } finally {
    try {
     if (rs != null) {
      rs.close();
     }
     if (cs != null) {
      cs.close();
     }
     if (conn != null) {
      conn.close();
     }
    } catch (SQLException e) {
    }
   }

}

}

注意:cs.getString(2)中的数值2并非任意的,而是和存储过程中的out列对应的,如果out是在第一个位置,那就是proc.getString(1),如果是第三个位置,就是proc.getString(3),当然也可以同时有多个返回值,那就是再多加几个out参数了。   

三:返回列表     

由于oracle存储过程没有返回值,它的所有返回值都是通过out参数来替代的,列表同样也不例外,但由于是集合,所以不能用一般的参数,必须要用pagkage了.所以要分两部分,   

1. 建一个程序包。如下:   

CREATE OR REPLACE PACKAGE MYPACKAGE   AS   

TYPE MY_CURSOR IS REF CURSOR;   

end MYPACKAGE;   

2. 建立存储过程,如下:   

CREATE OR REPLACE PROCEDURE PRO_3(p_CURSOR out MYPACKAGE.MY_CURSOR) IS   

BEGIN     

     OPEN p_CURSOR FOR SELECT * FROM DBO.EMP;   

END PRO_3;   

可以看到,它是把游标(可以理解为一个指针),作为一个out 参数来返回值的。   

  

Java代码:   

package com.icesoft.service;

import java.sql.*;
import java.sql.ResultSet;

public class CallProcedureTest2 {

public CallProcedureTest2() {
   super();
}

public static void main(String[] args) {

   String driver = "oracle.jdbc.driver.OracleDriver";
   String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
   String user = "admin";
   String pwd = "password";

   Connection conn = null;
   CallableStatement cs = null;
   ResultSet rs = null;
   try {
    Class.forName(driver);
    conn = DriverManager.getConnection(url, user, pwd);
    cs = conn.prepareCall("{ call DBO.PRO_3(?) }");
    cs.registerOutParameter(1, oracle.jdbc.OracleTypes.CURSOR);
    cs.execute();
    rs = (ResultSet) cs.getObject(1);

    while (rs.next()) {
     System.out.println("\t" + rs.getString(1) + "\t"
       + rs.getString(2) + "\t");
    }
   } catch (SQLException e) {
    e.printStackTrace();
   } catch (Exception e) {
    e.printStackTrace();
   } finally {
    try {
     if (rs != null) {
      rs.close();
      if (cs != null) {
       cs.close();
      }
      if (conn != null) {
       conn.close();
      }
     }
    } catch (SQLException e) {
    }
   }

}

}