正则表达式 "value":\["(.*?)"\]
然后取第一个分组就好了，加个？是懒惰匹配，尽量匹配少的字符
这段字符串，需要提取 "MEMBERID":"24912496","SHOPTYPE" 中间的数字 24912496
两个特定字符串带有符号的；例如PROMOTEDTYPE":"260","MEMBERID":"24912496","SHOPTYPE":"2","EXLEVEL":"15"，"PROMOTEDTYPE":"260","MEMBERID":"78912496","SHOPTYPE":"2","EXLEVEL":"15"，"PROMOTEDTYPE":"260","EXMEMBERID":"28912496","SHOPTYPE":"2","EXLEVEL":"15"，"PROMOTEDTYPE":"260","MEMBERID":"74122906","SHOPTYPE":"2","EXLEVEL":"15"。
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