java調Python指令碼(四):java返回Python錯誤日誌
阿新 • • 發佈:2018-12-03
上一篇java調Python指令碼時沒有返回錯誤的日誌提醒行等,在這裡補上,主要用java.lang.Process.getErrorStream() 方法獲取子程序的錯誤流。資料流獲取由該Process物件表示的程序的錯誤輸出流的管道的資料。
1、java程式碼:
public static void main(String[] args) { Process proc; try { String[] args1 = new String[] { "python", "C:\\project\\pytools\\runpythonfile.py"}; proc = Runtime.getRuntime().exec(args1); // 用輸入輸出流來擷取結果 BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream(), "GBK")); //錯誤流 BufferedReader error = new BufferedReader(new InputStreamReader(proc.getErrorStream())); System.out.println("start..."); String line = null; while ((line = in.readLine()) != null) { System.out.println("=====python返回結果:" + line); if (line.contains("[{")) { System.out.println("======最想要的結果:" + line); JSONArray fromObject = JSONObject.parseArray(line); System.out.println(fromObject); } } String err = null; while ((err = error.readLine()) != null) { System.out.println("=====error:" + err); } System.out.println("end..."); in.close(); proc.waitFor(); } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } }
2、結果: