JAVA創建子進程並處理waitFor() 阻塞問題

雖然很想休息，但是想想還是要把今天學的東西記下來，不然以后再用還是新知識。

新建一個線程類讀取子進程的匯報信息和錯誤信息，避免阻塞

 class StreamGobbler extends Thread
 {
     InputStream is;
     String type;
     
     StreamGobbler(InputStream is, String type)
     {
         this.is = is;
         this.type = type;
     }
     
     public void run()
     {
         try
         {
             InputStreamReader isr = new InputStreamReader(is);
             BufferedReader br = new BufferedReader(isr);
             String line=null;
             while ( (line = br.readLine()) != null)
                 System.out.println(type + ">" + line);    
             } catch (IOException ioe)
               {
                 ioe.printStackTrace();  
               }
     }
 }

 

創建子進程的RUN方法

//cmd命令
String s = "I:/OpenModelica-v1.9.7/bin/omc.exe "+courseFile+"/modelica/tcs.mos";

//執行cmd命令
Process proc = Runtime.getRuntime().exec(s);

//接收子進程的匯報信息和錯誤信息，避免阻塞
new StreamGobbler(proc.getInputStream(),"INFO").start(); 
new StreamGobbler(proc.getErrorStream(),"ERROR").start();

//獲取子進程執行結果狀態
int status=proc.waitFor();
if (status == 0){
System.out.println(n+"執行完畢");
detect(n);
}else
System.out.println(n+"執行失敗");

//銷毀子進程
proc.destroy();

 

 

注：JAVA進程waitFor() 阻塞總結參照博客https://blog.csdn.net/jinhao2003/article/details/2136919