问题描述：
数据加密后:密文每76个字符后换行
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NjJDM0Q5NjMwRTk0REE4NDgzOTk3OEUyMDBCNDlCQ0Y0MEIyOUZCRTZGREUxNkVBN0UyMTJENTVD
M0Q0MzkwNDU1NDE5NkFGMTM0RUZBRUVGMEUxMUUxMjYwRTI5NjY3MjMyOURBMjgyMjQ3RjFDQ0I4
NDVFNTk2MzAxRjMwMDIxMkYwMURFMTc3RTFGMkIxREQxQ0IwMUEwQ0NCMDg1MDIxNEU1NUYwRUY1
RDZDMUQ1NzUzODI5MDA2NTQwOTY5OUM4REVERkUxOTg0NTQyQjVBRTMyRDM5RjUzMkRFQjMxNkNF
MkQw密文用String类型返回：变一行，存在换行符（\n）
QTY0NTNGOTFCOEJEMEU1QjBFRTBBODZCRTBBNDEyMjQzQzExNkVCM0U0MzM5RTc3MDE3M0ZFNjYz\nNjJDM0Q5NjMwRTk0REE4NDgzOTk3OEUyMDBCNDlCQ0Y0MEIyOUZCRTZGREUxNkVBN0UyMTJENTVD\nM0Q0MzkwNDU1NDE5NkFGMTM0RUZBRUVGMEUxMUUxMjYwRTI5NjY3MjMyOURBMjgyMjQ3RjFDQ0I4\nNDVFNTk2MzAxRjMwMDIxMkYwMURFMTc3RTFGMkIxREQxQ0IwMUEwQ0NCMDg1MDIxNEU1NUYwRUY1\nRDZDMUQ1NzUzODI5MDA2NTQwOTY5OUM4REVERkUxOTg0NTQyQjVBRTMyRDM5RjUzMkRFQjMxNkNF\nMkQw
解密改密文（存在换行符）时报错：需要对密文的换行符进行转义
org.apache.commons.lang3.StringEscapeUtils
StringEscapeUtils.unescapeJava(string)；