內(nèi)容: 在網(wǎng)上常見的用Java調(diào)用外部命令返回結(jié)果的方法是： process =runtime.exec(cmd） is = process.getInputStream(); isr=new InputStreamReader(is); br =new BufferedReader(isr); while( (line = br.readLine()) != null ) { out.println(line); out.flush(); } 這種方法在遇到像cvs checkout modules這樣不能馬上返回結(jié)果的命令來說是無效的，不僅得不到返回結(jié)果，進(jìn)程也會終止。其原因是，process在沒有來得及gegtInputStream是，調(diào)用了BufferedReader.readLine其返回結(jié)果是null，也就是說循環(huán)一開始就會停止。因此想要正常運(yùn)行只能直接讀取process.getInputStream()，如下：import java.io.*;/** * * @author tyrone * */public class CMDExecute { /** * @param cmd * @return * @throws IOException */ public synchronized String run(String[] cmd,String workdirectory) throws IOException{ String line=null; String result=''; try { ProcessBuilder builder = new ProcessBuilder(cmd); //set working directory if (workdirectory!=null) builder.directory(new File(workdirectory)); builder.redirectErrorStream(true); Process process = builder.start(); InputStream in=process.getInputStream(); byte[] re=new byte[1024]; while (in.read(re)!= -1) { System.out.println(new String(re)); result = result + new String(re); } in.close(); } catch (Exception ex) { ex.printStackTrace(); } return result; } /** * @param args=cvs log */ public static void main(String[] args){ String result=null; CMDExecute cmdexe=new CMDExecute(); try { result= cmdexe.run(args,'D:MyProjectcolimasaxis_c'); System.out.println(result); }catch ( IOException ex ){ ex.printStackTrace(); } }}經(jīng)過測試，本方法可以運(yùn)行返回大量結(jié)果的應(yīng)用程序。我的blog:http://blog.csdn.net/tyrone1979 Java, java, J2SE, j2se, J2EE, j2ee, J2ME, j2me, ejb, ejb3, JBOSS, jboss, spring, hibernate, jdo, struts, webwork, ajax, AJAX, mysql, MySQL, Oracle, Weblogic, Websphere, scjp, scjd 在網(wǎng)上常見的用Java調(diào)用外部命令返回結(jié)果的方法是： process =runtime