tomcat无法正确解析请求参数

24-Mar-2018 14:11:20.564 INFO [http-nio-8080-exec-3] org.apache.coyote.http11.Http11Processor.service Error parsing HTTP request header
Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level.
java.lang.IllegalArgumentException: Invalid character found in the request target. The valid characters are defined in RFC 7230 and RFC 3986
at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:476)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:687)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)

错误代码 400 请求参数有误
tomcat版本为8.5.29，请求中用了无效的字符。
查看RFC规范知,url中只允许包含英文字母(a-zA-Z)、数字(0-9)、-_.~四个特殊字符以及保留字符( ! * ’ ( ) ; : @ & = + $ , / ? # [ ] ) (26*2+10+4+18=84)这84个字符.
而我的请求中出现了{}大括号,所以tomcat报错.

解决方法：1.配置tomcat对字符的支持
在 catalina.properties中添加 tomcat.util.http.parser.HttpParser.requestTargetAllow=|{} 但是只支持7.0.76, 8.0.42, 8.5.12 之后的版本(这些版本之后支持设置上述属性)
2.更换tomcat，Tomcat从 7.0.73, 8.0.39, 8.5.7 版本后添加了对Url的限制。
3.对请求编码解码