Oracle使用java source调用外部程序

Posted 2020-08-09

需求

Oracle调用第三方外部程序。Oracle使用sqluldr2快速导出大批量数据，然后用winrar压缩后发送邮件。

本文档主要实现前两步需求，发送邮件程序这里不再说明。

原码

授权

begin dbms_java.grant_permission(‘SCOTT‘,‘SYS:java.io.FilePermission‘,‘<<ALL FILES>>‘,‘read,write,execute,delete‘); end;

begin dbms_java.grant_permission(‘SCOTT‘,‘java.lang.RuntimePermission‘,‘*‘,‘writeFileDescriptor‘ ); end;

java source

create or replace and compile java source named jv_run_extpro as

import java.io.*;

import java.lang.*;

import java.util.*;

import java.sql.*;

import oracle.sql.*;

public class jv_run_extpro

{

public static void run(String cmd) throws IOException

{

Process p=Runtime.getRuntime().exec(cmd);

StreamGobbler errorGobbler = new StreamGobbler(p.getErrorStream(), "Error");

StreamGobbler outputGobbler = new StreamGobbler(p.getInputStream(), "Output");

errorGobbler.start();

outputGobbler.start();

try

{

p.waitFor();

}

catch(InterruptedException ie)

{

System.out.println(ie);

}

}

public static class StreamGobbler extends Thread {

?

InputStream is;

String type;

?

public StreamGobbler(InputStream is, String type) {

this.is = is;

this.type = type;

}

?

public void run() {

try {

InputStreamReader isr = new InputStreamReader(is);

BufferedReader br = new BufferedReader(isr);

String line = null;

while ((line = br.readLine()) != null) {

if (type.equals("Error")) {

System.out.println("Error :" + line);

} else {

System.out.println("Debug:" + line);

}

}

} catch (IOException ioe) {

ioe.printStackTrace();

}

}

}

}?

说明：

StreamGobbler这个类不能少，用于异步读取命令的输出。

存储过程

create or replace procedure pro_jv_run_extpro(p_cmd varchar2) as

language java name ‘jv_run_extpro.run(java.lang.String)‘;

调用

begin

pro_jv_run_extpro(‘sqluldr264.exe scott/[email protected] query="select * from emp" field=, head=yes file=D:\Desktop\tmp\sqluldr2\OUT2.TXT‘);

pro_jv_run_extpro(‘"D:\Program Files\WinRAR\Rar.exe" a -ep -df "D:\Desktop\tmp\sqluldr2\20160916.rar" "D:\Desktop\tmp\sqluldr2\OUT2.TXT"‘);

end;

参数说明：

a: 压缩文件

-ep:包内不显示压缩路径

-df：压缩后删除原文件

总结

程序执行需要授权，如需要查看执行日志，可在sqlplus下先执行：

Set serveroutput on

Exec dbms_java.set_output(5000);