如何使用Oracle存儲過程的一個簡單例子

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關於Oracle存儲過程的介紹，我就不多囉嗦了。

建立存儲過程

CREATE OR REPLACE PROCEDURE test_pro3(x OUT INT,y OUT int)
IS
  BEGIN
    x := 20;
    y := 30;
  END;

查詢存儲過程：

SQL> SELECT text FROM all_source WHERE TYPE = 'PROCEDURE' AND name = 'TEST_PRO3';

TEXT
--------------------------------------------------------------------------------
PROCEDURE test_pro3(x OUT INT,y OUT int)
IS
  BEGIN
    x := 20;
    y := 30;
  END;

已選擇6行。

JAVA調用存儲過程的code：

package votory;

import java.sql.Connection;
import java.sql.DriverManager;

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

public class ConneDB {
    public ConneDB() {
    }

    public static void main(String[] args) {
        String driver = "oracle.jdbc.driver.OracleDriver";
        String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521:SID";
        Statement stmt = null;
        ResultSet rs = null;
        Connection conn = null;
        CallableStatement cstmt = null;

        try {
            Class.forName(driver);
            conn = DriverManager.getConnection(strUrl, "scott", "tiger");
            CallableStatement proc = null;

            proc = conn.prepareCall("{ call test_pro3(?,?)}");
            proc.registerOutParameter(1, Types.INTEGER);
            proc.registerOutParameter(2, Types.INTEGER);
            proc.execute();

            String test = proc.getString(1);
            String test2 = proc.getString(2);

            System.out.println(test + " " + test2);
            System.out.println("DONE..............");
        } catch (SQLException ex2) {
            ex2.printStackTrace();
        } catch (Exception ex2) {
            ex2.printStackTrace();
        } finally {
            try {
                if (rs != null) {
                    rs.close();
                    if (stmt != null) {
                        stmt.close();
                    }
                    if (conn != null) {
                        conn.close();
                    }
                }
            } catch (SQLException ex1) {
            }
        }
    }
}

結果如下：

20 30
DONE..............

如何定義和處理一個遊標呢：

CREATE OR REPLACE PACKAGE testpackage
IS
  TYPE test_cursor IS REF CURSOR;
END;

CREATE OR REPLACE PROCEDURE test_pro4(p_cursor OUT testpackage.test_cursor)
IS
  BEGIN
    OPEN p_cursor FOR SELECT * FROM a;
  END;

總算是搞明白一個簡單例子。。。。。呵呵