对文件读入时进行特殊字符过滤，再读出来

/**
* 对文件读入时进行特殊字符过滤
* @param inFile  读入的文件
* @param outFile  输出的文件
* @author zhang
*/
public void FileFilter(String inFile, String outFile) {
    try {
                FileInputStream fis = new FileInputStream(inFile);
                FileOutputStream fos = new FileOutputStream(outFile);
                byte [] b = new byte [1024];
               int  i;

                try  {
                    while  ((i = fis.read(b)) != -1) {
                     String str = new String(b);
                     char [] ct = str.toCharArray();
                     StringBuffer stemp = new StringBuffer();
                     /**
                      * 使用正则表达式进行过滤，只允许英文字母、数字、汉字和 ，。, . ; ；这些符号
                     */
                     for (char  c : ct) {
                          String temp = String.valueOf(c);
                          String regex = "[a-zA-Z0-9\u4e00-\u9fa5 ，。, . ; ；]";
                          Pattern pattern = Pattern.compile(regex);
                          Matcher matcher = pattern.matcher(temp);
                         boolean bl = matcher.matches();
                          if (bl) {
                                  stemp.append(temp);
                          }
                      }
                      str = stemp.toString().trim();
                      fos.write(str.getBytes());         //把过滤后的文件给读出来
                      fos.flush();
                      }
               } catch (IOException e) {
                      e.printStackTrace();
               }
      } catch (FileNotFoundException e) {
              System.out.println("file not found");
              e.printStackTrace();
      }
}