Calling external commands in Java

Source: Internet
Author: User
Tags return string
Calling external commands in Java execcommond{public Execcommond () {}/** * executing a command * @param execstr string Command strings * @return string The information when the command error is executed. */public static string exec (String execstr) {Runtime Runtime = Runtime.getruntime (); Get current Run-time object String outinfo= "";//Execute Error The output information try {string[] args = new string[] {"sh", "-C", execstr};//execute commands under Linux//execute commands under Windows//string[] args = new String [] {"cmd", "-C", execstr}; Process proc = runtime.exec (args); Start another process to execute the command inputstream in = Proc.geterrorstream ();//Get the error message output. BufferedReader br = new BufferedReader (new InputStreamReader (in)); String line = ""; while (line = Br.readline ())!= null) {Outinfo = outinfo + line + \ n; System.out.println (Outinfo); //Check to see if the command failed.  try {if (proc.waitfor ()!= 0) {System.err.println ("exit value =" + Proc.exitvalue ());}} catch (Interruptedexception e) {System.err.print (e); E.printstacktrace ();}} catch (IOException e) {flag = false; SYSTEM.OUT.PRINTLN ("Exec error:" + e.getmessage ()); E.printstacktrace ();finally {return outinfo;}} }



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