1. 先看一下这个目录
[oracle@ocean ~]$ pwd
/home/oracle
[oracle@ocean ~]$ ls -l
total 8
-rw-r--r-- 1 oracle orains 604 Dec 26 2006 bash

2. 连接到test用户
SQL> conn test/test
Connected.

3. 授于test用户文件读写和执行命令的权限
SQL>exec dbms_java.grant_permission('TEST','SYS:java.io.FilePermission','<<ALL FILES>>','read,write,execute,delete');
PL/SQL procedure successfully completed.

SQL>exec dbms_java.grant_permission('TEST','java.lang.RuntimePermission','*','writeFileDescriptor' );
PL/SQL procedure successfully completed.

4. 建立java存储过程,注意,这里的exp 路径和dmp文件的路径是数据库服务器的路径
create or replace and compile java source named "aa"
as
import java.io.*;
import java.lang.*;
import java.util.*;
import java.sql.*;
import oracle.sql.*;

public class aa
{
public static void invoke_exe() throws IOException
{
Process p=Runtime.getRuntime().exec("/oracle/product/9.2.4/bin/exp userid=test/test file=/home/oracle/test.dmp");
try
{
p.waitFor();
}catch(InterruptedException ie){System.out.println(ie);}
}
}
/

Java created.

Elapsed: 00:00:00.01

5. 建立调用java存储过程的存储过程call_aa
create or replace procedure call_aa
as language java
name 'aa.invoke_exe()';
/

6. 执行java存储过程
exec call_aa;

7. 检查一下dmp文件是否已经生成
[oracle@ocean ~]$ pwd
/home/oracle
[oracle@ocean ~]$ ls -l
total 28
-rw-r--r-- 1 oracle orains 604 Dec 26 2006 bash
-rw-r--r-- 1 oracle orains 16384 Jul 3 14:12 test.dmp

-----------------

exec dbms_Java.Grant_Permission('TEST', 'java.io.FilePermission', '<<ALL FILE>>', 'read ,write, execute, delete');
exec dbms_Java.Grant_Permission('TEST', 'java.io.FilePermission', 'd:aa.bat', 'read ,write, execute, delete');
exec dbms_java.grant_permission('TEST','java.lang.RuntimePermission','*','writeFileDescriptor' );