oracle如何使用java source调用外部程序

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。

源码

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.*;
publicclass jv_run_extpro
{
publicstaticvoid 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);
}
}

publicstaticclass
StreamGobbler extends Thread {
InputStream is;
String type;

public StreamGobbler(InputStream is, String type) {
this.is = is;
this.type = type;

}

publicvoid 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();

}

}

}

}

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/hh@pdborcl 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;

总结

Java source里StreamGobbler这个类不能少，用于异步读取命令的输出。