存儲(chǔ)過(guò)程(二)
一:無(wú)返回值的存儲(chǔ)過(guò)程
存儲(chǔ)過(guò)程為:
CREATE OR REPLACE PROCEDURE TESTA(PARA1 IN VARCHAR2,PARA2 IN VARCHAR2) AS BEGIN INSERT INTO HYQ.B_ID (I_ID,I_NAME) VALUES (PARA1, PARA2); END TESTA; |
然后呢,在java里調(diào)用時(shí)就用下面的代碼:
package com.hyq.src; import java.sql.*; import java.sql.ResultSet; public class TestProcedureOne { public TestProcedureOne() { } public static void main(String[] args ){ String driver = "oracle.jdbc.driver.OracleDriver"; String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521: hyq "; Statement stmt = null; ResultSet rs = null; Connection conn = null; CallableStatement cstmt = null; try { Class.forName(driver); conn = DriverManager.getConnection(strUrl, " hyq ", " hyq "); CallableStatement proc = null; proc = conn.prepareCall("{ call HYQ.TESTA(?,?) }"); proc.setString(1, "100"); proc.setString(2, "TestOne"); proc.execute(); } 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) { } } } } |
當(dāng)然了,這就先要求要建張表TESTTB,里面兩個(gè)字段(I_ID,I_NAME)。
二:有返回值的存儲(chǔ)過(guò)程(非列表)
存儲(chǔ)過(guò)程為:
CREATE OR REPLACE PROCEDURE TESTB(PARA1 IN VARCHAR2,PARA2 OUT VARCHAR2) AS BEGIN SELECT INTO PARA2 FROM TESTTB WHERE I_ID= PARA1; END TESTB; |
在java里調(diào)用時(shí)就用下面的代碼:
package com.hyq.src; public class TestProcedureTWO { public TestProcedureTWO() { } public static void main(String[] args ){ String driver = "oracle.jdbc.driver.OracleDriver"; String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521:hyq"; Statement stmt = null; ResultSet rs = null; Connection conn = null; try { Class.forName(driver); conn = DriverManager.getConnection(strUrl, " hyq ", " hyq "); CallableStatement proc = null; proc = conn.prepareCall("{ call HYQ.TESTB(?,?) }"); proc.setString(1, "100"); proc.registerOutParameter(2, Types.VARCHAR); proc.execute(); String testPrint = proc.getString(2); System.out.println("=testPrint=is="+testPrint); } 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) { } } } } } |
注意,這里的proc.getString(2)中的數(shù)值2并非任意的,而是和存儲(chǔ)過(guò)程中的out列對(duì)應(yīng)的,如果out是在第一個(gè)位置,那就是proc.getString(1),如果是第三個(gè)位置,就是proc.getString(3),當(dāng)然也可以同時(shí)有多個(gè)返回值,那就是再多加幾個(gè)out參數(shù)了。
三:返回列表
由于oracle存儲(chǔ)過(guò)程沒(méi)有返回值,它的所有返回值都是通過(guò)out參數(shù)來(lái)替代的,列表同樣也不例外,但由于是集合,所以不能用一般的參數(shù),必須要用pagkage了。所以要分兩部分,
1, 建一個(gè)程序包。如下:
CREATE OR REPLACE PACKAGE TESTPACKAGE AS TYPE Test_CURSOR IS REF CURSOR; end TESTPACKAGE; |
2,建立存儲(chǔ)過(guò)程,存儲(chǔ)過(guò)程為:
CREATE OR REPLACE PROCEDURE TESTC(p_CURSOR out TESTPACKAGE.Test_CURSOR) IS BEGIN OPEN p_CURSOR FOR SELECT * FROM HYQ.TESTTB; END TESTC; |
可以看到,它是把游標(biāo)(可以理解為一個(gè)指針),作為一個(gè)out 參數(shù)來(lái)返回值的。
在java里調(diào)用時(shí)就用下面的代碼:
package com.hyq.src; import java.sql.*; import java.io.OutputStream; import java.io.Writer; import java.sql.PreparedStatement; import java.sql.ResultSet; import oracle.jdbc.driver.*; public class TestProcedureTHREE { public TestProcedureTHREE() { } public static void main(String[] args ){ String driver = "oracle.jdbc.driver.OracleDriver"; String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521:hyq"; Statement stmt = null; ResultSet rs = null; Connection conn = null; try { Class.forName(driver); conn = DriverManager.getConnection(strUrl, "hyq", "hyq"); CallableStatement proc = null; proc = conn.prepareCall("{ call hyq.testc(?) }"); proc.registerOutParameter(1,oracle.jdbc.OracleTypes.CURSOR); proc.execute(); rs = (ResultSet)proc.getObject(1); while(rs.next()) { System.out.println("<tr><td>" + rs.getString(1) + "</td><td>"+rs.getString(2)+"</td></tr>"); } } 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) { } } } } |
1、取得存儲(chǔ)過(guò)程返回的值
CallableStatement cs = conn.prepareCall("{call proc_fbquery(?,?,?)}"); //調(diào)用存儲(chǔ)過(guò)程cs.setString(1,mem);cs.setInt(2,n);cs.registerOutParameter(3,oracle.jdbc.OracleTypes.CURSOR);cs.execute();rs=(ResultSet)cs.getObject(3); |
2、對(duì)存儲(chǔ)過(guò)程賦值時(shí):
CallableStatement cs= conn.prepareCall("{call proc_fbquery(?)}"); //調(diào)用存儲(chǔ)過(guò)程cs.registerOutParameter(1,oracle.jdbc.OracleTypes.CURSOR);cs.setCursorName(cusorName); //提供result的名稱cs.setString(1,rs);rs=cs.executeQuery();rs =(ResultSet)cs.getObject(1); |
posted on 2008-04-23 09:45 forgood 閱讀(135) 評(píng)論(0) 編輯 收藏