Matcher是怎么知道分隔符的

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#1 Created at ... [Delete] [Delete and Lock User]

好像没有告诉他分隔符是啥

#2 Created at ... [Delete] [Delete and Lock User]

好像是用括号

#3 Created at ... [Delete] [Delete and Lock User]

唉，没好好看，原来廖老师已经写了

正确的方法是用(...)先把要提取的规则分组，把上述正则表达式变为(\d{3,4})\-(\d{6,8})。