java - 具有 "{"的字符串的模式匹配

Question

首先我做了这个-

String str = "{\"hits\":[{\"links_count\":6,\"forum_count\":11}],\"totalHitCount\":1}";

        Assert.assertTrue(str.matches("{\"hits\":[{\"links_count\":[0-9]{1,},\"forum_count   \":11}],\"totalHitCount\":[0-9]{1,}}"),
            "Partnership message does not appear");

这让我出现以下错误 -

 Exception in thread "main" java.util.regex.PatternSyntaxException: Illegal repetition
{"hits":[\{"links_count":[0-9]{1,},"forum_count":11}],"totalHitCount":[0-9]{1,}}

然后我做了(转义“{”)-

String str = "\\{\"hits\":[\\{\"links_count\":6,\"forum_count\":11\\}],\"totalHitCount\":1\\}";

    Assert.assertTrue(str.matches("\\{\"hits\":[\\{\"links_count\":[0-9]{1,},\"forum_count\":11\\}],\"totalHitCount\":[0-9]{1,}\\}"),
            "Partnership message does not appear");

并得到以下错误-

Exception in thread "main" java.lang.AssertionError: Partnership message does not appear expected:<true> but was:<false>

我在这里错过了什么？

Answer 1

您不需要在输入中对 { [ 进行转义。但是您需要在正则表达式中转义 [ ]。

试试这个:

String str = "{\"hits\":[{\"links_count\":6,\"forum_count\":11}],\"totalHitCount\":1}";

System.out.println(str.matches("\\{\"hits\":\\[\\{\"links_count\":[0-9]{1,},\"forum_count\":11\\}\\],\"totalHitCount\":[0-9]{1,}\\}"));