我想删除空格和特殊字符,并+在以下输入前加上 a :String numberTo = "+1- 801-351-9512";预期输出:+18013519502我试过的代码:static String removeWhiteSpaceAndDashFromNumberAndPrependChar(String numberTO) { numberTO = StringUtils.deleteWhitespace(numberTO); numberTO = StringUtils.remove(numberTO, "-"); numberTO = StringUtils.prependIfMissing(numberTO, "+", "+"); return numberTO;}
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