Oracle Java Stored Procedure調用Unix shell

援引：Doc ID 109095.1

首先，在數據庫端創建調用Unix shell的java類，用Runtime.getRuntime().exec()實現

1.

CREATE OR REPLACE JAVA SOURCE NAMED "CaptureStream" as 
import java.util.*;
import java.io.*;

class CaptureStream implements Runnable {
    private final InputStream is;
    private final String type;
    private final OutputStream redirect;
    private boolean  redirected = false;


    CaptureStream(InputStream is, String type, OutputStream redirect)
    {
        this.is = is;
        this.type = type + ">";
        this.redirect = redirect;
    }

    CaptureStream(InputStream is, String type)
    {
        this(is, type, null);
    }


    CaptureStream(InputStream is)
    {
        this(is, " ", null);
    }

    public void run()
    {

        try {
            PrintWriter pw = null;
            if (redirect != null) {
                pw = new PrintWriter(redirect);
                redirected = true;
            }


            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String line=null;
            while ( (line = br.readLine()) != null) {
                System.out.println(type + line);    
                if (redirected) {
                    pw.println(line);
                }
            }
            if (redirected) {
                pw.flush();
                pw.close();
            }
            br.close();
            isr.close();
        } catch (IOException ioe) {
            ioe.printStackTrace();  
        }
    }
};
/

2.

CREATE OR REPLACE JAVA SOURCE NAMED "ExecOSCmd" as 
import java.util.*;
import java.io.*;
public class ExecOSCmd {
    public static void main (String args[])
    {
        int rc = 0;
        if (args.length < 1) {
            System.out.println("USAGE: java ExecOSCmd \'cmd\' ");
            System.exit(1);
        }

        try {
            String cmd = args[0];
            FileOutputStream fos = null;
            if (args.length == 2 ) {
                fos = new FileOutputStream(args[1]);
            }
            Runtime rt = Runtime.getRuntime();
            Process p = rt.exec(cmd);


            CaptureStream err = new CaptureStream(p.getErrorStream(), "ERR");            
            Thread e = new Thread(err);

            /* NOTE we do not join the error thread.  If there was no
         Error it may never return.  We would wait forever for it to 
         return thus janging this process */ 
            e.start();

            CaptureStream out = new CaptureStream(p.getInputStream(), 
                                                  "OUT", fos);
            Thread o = new Thread(out);
            o.start();

            try {
                rc = p.waitFor(); 
                /* Handle exceptions for waitFor() */ 
            } catch (InterruptedException intexc) {
                System.out.println("Interrupted Exception on waitFor: " + 
                                   intexc.getMessage()); 
            }

            if (fos !=null) {
                o.join();      // need to wait for the output to finish.
                fos.flush();
                fos.close();
            }

            System.out.println("ExitValue: " + rc);

        } catch (Throwable t) {
            System.out.println("ExitValue: " + rc);
            t.printStackTrace();
        }
    }
};
/

3.定義調用2的存儲過程

CREATE OR REPLACE PROCEDURE executecmd
AS
language java name 'ExecOSCmd.main(java.lang.String[])';

4.在數據庫Command Window調用步驟3

首先，設置將輸出項顯示

SQL> set serveroutput on
SQL> call dbms_java.set_output(5000);

Method called

SQL> exec executecmd('ls -ls');

OUT>total 895254