Tomcat URL get方式传递json参数时，由于地址栏包含有类似{",等这样的非法字符导致报Invalid character found in the request target. The valid characters are defined in RFC 3986 错误。
25-Aug-2018 11:27:27.086 信息 [http-nio-8087-exec-5] 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:479)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:684)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1471)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
如果采用post方式传参则不会出现类似的问题。
一般而言，URL中不能包含的特殊字符:
键盘上那些控制键:(<32或者=127)
非英文字符(>127)
空格(32)
双引号(34)
#(35)
<(60)
>(62)
反斜杠(92)
^(94)
TAB上面那个键,~(96)
{(123)
}(124)
|(125)
解决方案如下：
1.在conf/catalina.properties中最后添加2行：
tomcat.util.http.parser.HttpParser.requestTargetAllow=|{}
org.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH=true
2.在conf/server.xml中的
relaxedPathChars="|{}[],"
relaxedQueryChars="|{}[],"