Merge branch 'master' of https://github.com/xuxueli/xxl-job

doc/XXL-JOB官方文档.md

 - 11、任务回调结果优化，支持展示在Rolling log中，方便问题排查；
 - 12、脚本任务异常Log输出优化；
 - 13、任务线程停止变量修饰符优化；
+- 14、脚本任务Log文件流关闭优化；
 
 
 ### TODO LIST

xxl-job-core/src/main/java/com/xxl/job/core/log/XxlJobFileAppender.java

 		appendLog += "\r\n";
 		
 		// append file content
+		FileOutputStream fos = null;
 		try {
-			FileOutputStream fos = null;
-			try {
-				fos = new FileOutputStream(logFile, true);
-				fos.write(appendLog.getBytes("utf-8"));
-				fos.flush();
-			} finally {
-				if (fos != null) {
-					try {
-						fos.close();
-					} catch (IOException e) {
-						logger.error(e.getMessage(), e);
-					}
-				}
-			} 
+			fos = new FileOutputStream(logFile, true);
+			fos.write(appendLog.getBytes("utf-8"));
+			fos.flush();
 		} catch (Exception e) {
 			logger.error(e.getMessage(), e);
+		} finally {
+			if (fos != null) {
+				try {
+					fos.close();
+				} catch (IOException e) {
+					logger.error(e.getMessage(), e);
+				}
+			}
 		}
 		
 	}

xxl-job-core/src/main/java/com/xxl/job/core/util/ScriptUtil.java

         // 标准输出：print （null if watchdog timeout）
         // 错误输出：logging + 异常 （still exists if watchdog timeout）
         // 标准输入
-        try (FileOutputStream fileOutputStream = new FileOutputStream(logFile, true)) {
+
+        FileOutputStream fileOutputStream = null;   //
+        try {
+            fileOutputStream = new FileOutputStream(logFile, true);
             PumpStreamHandler streamHandler = new PumpStreamHandler(fileOutputStream, fileOutputStream, null);
 
             // command
         } catch (Exception e) {
             XxlJobLogger.log(e);
             return -1;
+        } finally {
+            if (fileOutputStream != null) {
+                try {
+                    fileOutputStream.close();
+                } catch (IOException e) {
+                    XxlJobLogger.log(e);
+                }
+
+            }
         }
     }