异常The valid characters are defined in RFC 7230 and RFC 3986

GET请求添加了JSON参数值出现该异常
java.lang.IllegalArgumentException: Invalid character found in the request target
The valid characters are defined in RFC 7230 and RFC 3986

原因：
tomcat8不允许URL中出现"[]"字符
解决方案：
方案1：对参数进行UrlEncode
方案2：改为post请求
方案3：tomcat降级（没试，不推荐）
方案4：修改tomcat配置，忽略特殊字符（没试）
方案5：springboot，jar包部署，启动类添加如下代码，tomcat忽略特殊字符

@Beanpublic ConfigurableServletWebServerFactory webServerFactory() {TomcatServletWebServerFactory factory = new TomcatServletWebServerFactory();factory.addConnectorCustomizers((TomcatConnectorCustomizer) connector -> connector.setProperty("relaxedQueryChars", "|{}[]\\"));return factory;}