1、学生在学习jdbc的时候,会问到怎么调用存储过程,现在将java调用oracle存储过程的示例总结如下。(关于调用sqlserver的存储过程将在下次进行小结请关注)一:无返回值的存储过程存储过程为:? create or replace procedure adddept(deptno number,dname varchar2,loc varchar2)? as? begin? insert into dept values(deptno,dname,loc);? end;然后呢,在java里调用时就用下面的代码:? public class TestProcedure ? Connect
2、ion conn=null ;? CallableStatement cstmt=null ;? PreparedStatement pstmt=null ;? String url=“jdbc:oracle:thin:localhost:1521:mydb“;? String driver=“oracle.jdbc.driver.OracleDriver“;? String name=“;? public TestProcedure() ? try ? Class.forName(driver);? conn=DriverManager.getConnection(url,“scott“,“
3、tiger“);? cstmt=conn.prepareCall(“call adddept(?,?,?)“);? cstmt.setInt(1,13);? cstmt.setString(2,“间谍部2“);? cstmt.setString(3,“ningbo2“);cstmt.executeUpdate(); ? ? System.out.println(“success“);? ? catch (Exception e)e.printStackTrace();? finally? cstmt.close();? conn.close();? ? ? dept表为oracle数据库方案s
4、cott中的一个表二:有返回值的存储过程(非列表)存储过程为:CREATE OR REPLACE PROCEDURE TESTB(PARA1 IN VARCHAR2,PARA2 OUT VARCHAR2) ASBEGIN SELECT INTO PARA2 FROM TESTTB WHERE I_ID= PARA1; END TESTB;在java里调用时就用下面的代码:package com.hyq.src;public class TestProcedureTWO public TestProcedureTWO() public static void main(String args )
5、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.pr
6、epareCall(“ 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();finall
7、ytry if(rs != null)rs.close();if(stmt!=null)stmt.close();if(conn!=null)conn.close();catch (SQLException ex1) 注意,这里的proc.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
8、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 TESTPACKAGE ASTYPE Test_CURSOR IS REF CURSOR;end TESTPACKAGE;2,建立存储过程,存储过程为:CREATE OR REPLACE PROCEDURE TESTC(p_CURSOR out TESTPACKAGE.Test_CURSOR) IS BEGINOPEN p_CURSOR FOR SELECT * FROM HYQ.TESTTB;END TESTC;可以看到,它是
9、把游标(可以理解为一个指 ), 为一个out 参数来返回值的。在java里调用时就用下面的代码: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 vo
10、id 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 = nu
11、ll;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(“ + rs.getString(1) + “+rs.getString(2)+“);catch (SQLException ex2) ex2.printStackTrace();catch (Exception ex2) ex2.printStackTrace();finallytry if(rs != null)rs.close();if(stmt!=null)stmt.close();if(conn!=null)conn.close();catch (SQLException ex1)