判断一个文件是否为二进制文件

public static boolean isBinary(File file) { boolean isBinary = false; try { FileInputStream fin = new FileInputStream(file); long len = file.length(); for (int j = 0; j < (int) len; j++) { int t = fin.read(); if (t < 32 && t != 9 && t != 10 && t != 13) { isBinary = true; break; } } } catch (Exception e) { e.printStackTrace(); } return isBinary; }