问题：
信息: 解析 HTTP 请求 header 错误注意：HTTP请求解析错误的进一步发生将记录在DEBUG级别。
java.lang.IllegalArgumentException: 在方法名称中发现无效的字符串, HTTP 方法名必须是有效的符号.
at org.apache.coyote.http11.InternalAprInputBuffer.parseRequestLine(InternalAprInputBuffer.java:186)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1108)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:654)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2532)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2521)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
解决方法：