java处理多文件合并

 1 private static boolean combine(String outFile, List<String> inFiles) throws Exception{
 2         File[] files = new File[inFiles.size()];
 3         for(int i = 0; i < files.length; i++){
 4             files[i] = new File(inFiles.get(i));
 5         }
 6         FileInputStream fis = null;
 7         FileOutputStream fos = new FileOutputStream(outFile, true);//合并其实就是文件的续写,写成true
 8         for (int i = 0; i < files.length; i++){
 9             fis = new FileInputStream(files[i]);
10             int len = 0;
11             for (byte[] buf = new byte[1024 * 1024]; (len = fis.read(buf)) != -1;){
12                 fos.write(buf, 0, len);
13             }
14             fis.close();
15         }
16         fos.close();
17         return true;
18     }