这应该工作。它检查要合并的文件是否具有匹配的头。否则将引发异常。异常处理（关闭流等）已作为练习。
String[] headers = null;String firstFile = "/path/to/firstFile.dat";Scanner scanner = new Scanner(new File(firstFile));if (scanner.hasNextLine()) headers[] = scanner.nextLine().split(",");scanner.close();Iterator<File> iterFiles = listOfFilesToBeMerged.iterator();BufferedWriter writer = new BufferedWriter(new FileWriter(firstFile, true));while (iterFiles.hasNext()) { File nextFile = iterFiles.next(); BufferedReader reader = new BufferedReader(new FileReader(nextFile)); String line = null; String[] firstLine = null; if ((line = reader.readLine()) != null) firstLine = line.split(","); if (!Arrays.equals (headers, firstLine)) throw new FileMergeException("Header mis-match between CSV files: '" + firstFile + "' and '" + nextFile.getAbsolutePath()); while ((line = reader.readLine()) != null) { writer.write(line); writer.newline(); } reader.close();}writer.close();
