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:Desktoptmpsqluldr2OUT2.TXT'); pro_jv_run_extpro('"D:Program FilesWinRARRar.exe" a -ep -df "D:Desktoptmpsqluldr220160916.rar" "D:Desktoptmpsqluldr2OUT2.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。
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