JSON中optString和getString方法的区别

optstring方法会在对应的key中的值不存在的时候返回一个空字符串，但是getstring会抛一个jsonexception 。

 /**
   * returns the value mapped by {@code name} if it exists, coercing it if
   * necessary, or throws if no such mapping exists.
   *
   * @throws jsonexception if no such mapping exists.
   */
  public string getstring(string name) throws jsonexception {
    object object = get(name);
    string result = json.tostring(object);
    if (result == null) {
      throw json.typemismatch(name, object, "string");
    }
    return result;
  }
  /**
   * returns the value mapped by {@code name} if it exists, coercing it if
   * necessary, or the empty string if no such mapping exists.
   */
  public string optstring(string name) {
    return optstring(name, "");
  }

以上所述是小编给大家介绍的json中optstring和getstring方法的区别，希望对大家有所帮助