Java(CallableStatement)调用Oracle存储过程返回结果集(ResultSet)

 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：

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：

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：

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) {
            }
        }

    }

}

注意：在执行前一定要先把oracle的驱动包放到class路径里，否则会报错。