java 调用存储过程

最近做了个项目，是调用别人的存储过程。因为文档弄错了，害的我够惨。现在把调用java存储过程贴出来，希望大侠们多多指导。

package test;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Timestamp;
import java.sql.Types;

public class hz {
    public static void main(String[] args )
    {
	    CallableStatement proc = null;
	    Connection conn = null;
	    try 
	    {
		    Class.forName("oracle.jdbc.driver.OracleDriver");	
		    conn=DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl","hz","oracle");		
		    proc = conn.prepareCall("{call orcl.hz(?,?,?,?,?,?,?,?,?,?,?,?)}");	
		    proc.setString(1,"ss");
		    proc.setInt(2,100);
		    //此时间格式必须传入时分秒
		    proc.setTimestamp(3,Timestamp.valueOf("2012-12-20 00:00:00"));
		    proc.setTimestamp(4,Timestamp.valueOf("2012-12-20 00:00:00"));
		    proc.setTimestamp(5,Timestamp.valueOf("2012-12-20 00:00:00"));
		    proc.setInt(6,1);
		    proc.setString(7,"aa");
		    proc.setString(8,"1");
		    proc.setString(9,"dd");
		    proc.setString(10,"bb");
		    //调用存储过程出参
		    proc.registerOutParameter(11,Types.Integer);
		    proc.registerOutParameter(12,Types.VARCHAR);
		    proc.execute();
		    //接受存储过程出参
		    int i = proc.getString(11);
		    String s = proc.getString(12);
		    System.out.println("i的值为："+i);
		    System.out.println("s的值为："+s);
	    }catch (Exception ex)
	    {
	        System.out.println(ex.getMessage());
	    }
    }
}