Java删除properties配置文件中指定键值，properties配置文件,public stati

Java删除properties配置文件中指定键值，properties配置文件,public stati

public static boolean deleteKeyValue4Pro(String delete_key, String delete_value) {        boolean flag = false;        String toreplace =delete_key + "=" + delete_value + "\n";        try {            StringBuffer sb = new StringBuffer();            String templine;            File file = new File("ftpconfig.properties");            BufferedReader bin = new BufferedReader(new FileReader(file));            while ((templine = bin.readLine()) != null) {                templine = unicodeToString(templine);                sb.append(templine + "\n");            }            String save = new String(sb.toString());            System.out.println("before delete:\n" + save + "\n--------------\n");            System.out.println("delete:" + toreplace + "\n--------------\n");            Pattern pattern = Pattern.compile(toreplace, Pattern.MULTILINE);            Matcher matcher = pattern.matcher(save);            while (matcher.find()) {                save = matcher.replaceAll("");            }            BufferedWriter writer = new BufferedWriter(new FileWriter(file));            String[] saves = save.split("\n");            for (int i = 0; i < saves.length; i++) {                String[] key_values = saves[i].split("=");                writer.write(stringToUnicode(key_values[0]) + "="                        + key_values[1] + "\n");            }            System.out.println("after delete:\n" + save);            writer.flush();            bin.close();            writer.close();            flag = true;        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return flag;    }