java异常

Exception in thread "main" java.util.regex.PatternSyntaxException: Dangling meta character '*' near index 0
***
^
at java.util.regex.Pattern.error(Pattern.java:1924)
at java.util.regex.Pattern.sequence(Pattern.java:2090)
at java.util.regex.Pattern.expr(Pattern.java:1964)
at java.util.regex.Pattern.compile(Pattern.java:1665)
at java.util.regex.Pattern.<init>(Pattern.java:1337)
at java.util.regex.Pattern.compile(Pattern.java:1022)
at java.lang.String.split(String.java:2313)
at java.lang.String.split(String.java:2355)
at TestSplit.main(TestSplit.java:5)

主要原因是，+、*、|、\等符号在正则表达示中有相应的不同意义。用的时候加上“\\”或者“/”或者“[]”转义一下就可以了