public void Zheng() {
        try {
            BufferedReader bre = null;
            //String file = "d.txt";
            String file = "Dict.txt";
            bre = new BufferedReader(new FileReader(file));
            String line;
            try {
                while ((line = bre.readLine()) != null) // 判断最后一行不存在，为空结束循环
                {
                    temp.add(line);
                    // System.out.println(line);// 原样输出读到的内容
                }

                bre.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

        } catch (FileNotFoundException e) {
            System.out.println("未成功读取文件");
            e.printStackTrace();
        }

        String sub_str;
        while (start < total_len) {
            boolean flag = false;
            tmp_len = start + max_len <= total_len ? max_len : total_len - start;
            label: while (tmp_len > 0) {
                // System.out.println(1);
                sub_str = receive.substring(start, start + tmp_len);
                // System.out.println(sub_str);
                for (i = 0; i < temp.size(); i++) {
                    if (sub_str.equals(temp.get(i))) {
                        flag = true;
                    }
                }

                if (flag == true) {
                    words.add(receive.substring(start, start + tmp_len));
                    start = start + tmp_len;
                    break label;
                } else {
                    tmp_len = tmp_len - 1;
                    // System.out.println(tmp_len);
                }

                /*
                 * if sub_str in dict: words.append(setence[start : start +
                 * tmp_len]) start = start + tmp_len break else: tmp_len =
                 * tmp_len -1
                 */
            }
            if (tmp_len == 0) {
                words.add(receive.substring(start, start + 1));
                start = start + 1;
            }

        }