Java进程WAITFOR

我有以下的方法，其转换的源代码使用gvim作为HTML：Java进程WAITFOR

String code2html(String s) throws Exception { 
    if (s == null || s.length() == 0) return ""; 
    String txtfile = "dummyFile"+(UUID.randomUUID().toString())+".txt"; 
    String t; 
    //PrintWriter w = new PrintWriter(Konst.FPATH+"tmp.txt","UTF-8"); 
    File fl = new File(Konst.FPATH+txtfile); 
    FileWriter fw = new FileWriter(fl); 
    PrintWriter w = new PrintWriter(fw); 
    w.println(s); 
    w.close(); 
    Runtime rt = Runtime.getRuntime(); 
    String T; 
    try { 
     // Process pr = rt.exec(T = "gvim -c \"set syntax=Java\" -c \"wq\" -c \"q\" "+Konst.FPATH+"tmp.txt"); 
     //Process pr = rt.exec(T = "gvim "+Konst.FPATH+"tmp.txt -s "+Konst.FPATH+"scrip.vim"); 
     Process pr = rt.exec(T = "gvim "+Konst.FPATH+txtfile+" -s "+Konst.FPATH+"scrip.vim"); 
     System.out.println(T); 
     FileOutputStream fos; 

     StreamGobbler errorGobbler = new StreamGobbler(pr.getErrorStream(),"ERROR"); 
     StreamGobbler outputGobbler = new StreamGobbler(pr.getInputStream(),"OUTPUT",fos=new FileOutputStream(Konst.FPATH+"garbage.out")); 

     errorGobbler.start(); 
     outputGobbler.start(); 

     fos.flush(); 
     fos.close(); 
     int exitVal = pr.waitFor(); 

     StringBuilder sb = new StringBuilder(); 

     //BufferedReader b = new BufferedReader(new FileReader(Konst.FPATH + "tmp.txt.html")); 
     if (exitVal == 0) { 
      BufferedReader b = new BufferedReader(new FileReader(Konst.FPATH + txtfile + ".html")); 
      while ((t = b.readLine()) != null && !(t.length() >= 5 && t.substring(0, 5).equals("<body"))) ; 
      do { 
       sb.append(t + "\n"); 
      } while ((t = b.readLine()) != null && !(t.length() >= 6 && t.substring(0, 6).equals("</body"))); 
      sb.append(t); 
      return sb.toString(); 
     } 
     else return ""; 
    } 
    catch (Throwable e) { 
     e.printStackTrace(); 
    } 
    return ""; 
}

相关StreamGobbler是在这里：

class StreamGobbler extends Thread { 
InputStream is; 
String type; 
OutputStream os; 

StreamGobbler(InputStream is, String type) { 
    this(is,type,null); 
} 
StreamGobbler(InputStream is, String type, OutputStream os) { 
    this.is = is; this.type = type; this.os = os; 
} 
@Override 
public void run() { 
    try { 
     PrintWriter pw = null; 
     if (os != null) { 
      pw = new PrintWriter(os); 
     } 
     InputStreamReader isr = new InputStreamReader(is); 
     BufferedReader r = new BufferedReader(isr); 
     String line = null; 
     while ((line = r.readLine()) != null) { 
      if (pw != null) 
       pw.print(line); 
      System.out.println(type + ">" + line); 
     } 
     if (pw != null) 
      pw.flush(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
}

因此，gvim的应该是源转换代码到一个名为dummy + random string.html的html文件。它是这样做的。只有当它涉及到BufferedReader读取文件时，它没有找到它（“没有这样的文件或目录”），虽然文件确实出现在相关的文件夹中。所以，显然该文件是在BufferedReader尝试访问后创建的，尽管有waitFor（）命令。如何解决这个问题？

来源

2016-07-27 Ilonpilaaja

打印'Konst.FPATH + txtfile +“.html”'值并检查此路径是否正确 – Sanjeev

是的，这是正确的，文件出现在此路径中。 – Ilonpilaaja

尝试通过Thread.sleep检查退出值之前放一些延迟 – Sanjeev