HarmonyOS string 包含，替换

请参考如下函数：

class stringUtils {
  /**
   * 字符串替换
   * @param source 目标源
   * @param toCheck 查找目标
   * @param replacement 要替换成的字符
   * @returns
   */
  replaceIfContains(source: string, toCheck: string, replacement: string): string {
    if (source.includes(toCheck)) {
      return source.replace(toCheck, replacement)
    }
    return source
  }
}

let stringUtil:stringUtils = new stringUtils() as stringUtils

export {stringUtil}

采用新string 去接下

let ss = "http://134.176.102.68/cill/todo/index.html?token=[TOKEN]&uid=[UID]"
let s1 = ''
let s2 = ''

if (ss.includes('[TOKEN]')) {
  s1 = ss.replace('[TOKEN]', '1')
}
if (ss.includes('[UID]')) {
  s2 = s1.replace('[UID]', '2')
}
return s2