线程＆＃34; main＆＃34;中的例外情况java.util.regex.PatternSyntaxException：索引41附近的未闭合字符类，＆＃34;元数据＆＃34; [a-zA-Z0-9：{}＆＃34; ，+（）[] \ _ == *] * [}]

Question

实际元数据对象::

,"Metadata":{"ModifiedDate":"Thu Dec 10 20151046","CreatedDate":"Thu Dec 10 2015 10:46:30 GMT+0530 (IST)","HiddenRule":"[{\"text\":\"\",\"data_type\":\"operator\",\"internal_name\":\"\"},{\"text\":\"Gender\",\"data_type\":\"String\",\"internal_name\":\"gender\",\"class\":\"Open\"},{\"text\":\"\",\"data_type\":\"operator\",\"internal_name\":\"\"},{\"text\":\"==\",\"data_type\":\"operator\",\"internal_name\":\"==\",\"class\":\"Oper\"},{\"text\":\"\",\"data_type\":\"operator\",\"internal_name\":\"\"},{\"text\":\"\\\"sd\\\"\",\"data_type\":\"operator\",\"internal_name\":\"\\\"sd\\\"\",\"class\":\"Cons\"},{\"text\":\"\",\"data_type\":\"operator\",\"internal_name\":\"\"}]"} 

尝试搜索＆＃34;元数据＆＃34;对象，在JSON字符串中并用空格替换它。基本上从JSON字符串中删除对象。 ，\＆＃34;元数据\＆＃34; [A-ZA-Z0-9：{}＆＃34; ，+（）[] \ _ == ] [}]。但是当在JAVA程序中编译时，我正面临异常，

Exception in thread "main" java.util.regex.PatternSyntaxException: Unclosed character class near index 41
,"Metadata"[a-zA-Z0-9:{}" ,+()[]\_==*]*[}]
                                         ^
    at java.util.regex.Pattern.error(Pattern.java:1924)
    at java.util.regex.Pattern.clazz(Pattern.java:2493)
    at java.util.regex.Pattern.sequence(Pattern.java:2030)
    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.replaceAll(String.java:2162)
    at temp.main(temp.java:20)

    String str=",\"Metadata\":{\"ModifiedDate\":\"Thu Dec 10 20151046\",\"CreatedDate\":\"Thu Dec 10 2015 10:46:30 GMT+0530 (IST)\",\"HiddenRule\":\"[{\"text\":\"\",\"data_type\":\"operator\",\"internal_name\":\"\"},{\"text\":\"Gender\",\"data_type\":\"String\",\"internal_name\":\"gender\",\"class\":\"Open\"},{\"text\":\"\",\"data_type\":\"operator\",\"internal_name\":\"\"},{\"text\":\"==\",\"data_type\":\"operator\",\"internal_name\":\"==\",\"class\":\"Oper\"},{\"text\":\"\",\"data_type\":\"operator\",\"internal_name\":\"\"},{\"text\":\"\\\"sd\\\"\",\"data_type\":\"operator\",\"internal_name\":\"\\\"sd\\\"\",\"class\":\"Cons\"},{\"text\":\"\",\"data_type\":\"operator\",\"internal_name\":\"\"}]\"}";
        String regexes = ",\"Metadata\"[a-zA-Z0-9:{}\" ,+()[]\\_==*]*[}]";
        System.out.println(str.replaceAll(regexes, "Hi!!!"));

Answer 1

]和[a-zA-Z0-9:{}" ,+()\[\]\_==*\]*[}] 是正则表达式中的特殊字符。你必须逃脱它。

{{1}}