ActiveMQ版本：5.12
JDK版本：1.8
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使用ActiveMQ过程中，在管理界面查看消息详情，发现报错：
查看日志信息，报错如下：
2017-11-29 16:29:08,020 | WARN | /admin/message.jsp | org.eclipse.jetty.servlet.ServletHandler | qtp68389885-53 org.apache.jasper.JasperException: PWC6033: Unable to compile class for JSP PWC6197: An error occurred at line: 20 in the jsp file: /WEB-INF/tags/form/forEachMapEntry.tag PWC6199: Generated servlet error: The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:123)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:296)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:376)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Compiler.compile(Compiler.java:437)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:608)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.servlet.JspServletWrapper.loadTagFile(JspServletWrapper.java:261)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.TagFileProcessor.loadTagFile(TagFileProcessor.java:683)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.TagFileProcessor.access$000(TagFileProcessor.java:88)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.TagFileProcessor$TagFileLoaderVisitor.visit(TagFileProcessor.java:739)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1501)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2291)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2341)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.TagFileProcessor$TagFileLoaderVisitor.visit(TagFileProcessor.java:743)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1501)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2291)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2341)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.TagFileProcessor$TagFileLoaderVisitor.visit(TagFileProcessor.java:743)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1501)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2291)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2341)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2347)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$Root.accept(Node.java:498)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2291)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.TagFileProcessor.loadTagFiles(TagFileProcessor.java:757)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:222)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.compiler.Compiler.compile(Compiler.java:435)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:608)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:360)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:486)[jsp-2.1-glassfish-2.1.v20100127.jar:] at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:380)[jsp-2.1-glassfish-2.1.v20100127.jar:] at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)[geronimo-servlet_3.0_spec-1.0.jar:1.0] at org.eclipse.jetty.servlet.JspPropertyGroupServlet.service(JspPropertyGroupServlet.java:132)[jetty-all-8.1.16.v20140903.jar:8.1.16.v20140903] at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)[jetty-all-8.1.16.v20140903.jar:8.1.16.v20140903] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1496)[jetty-all-8.1.16.v20140903.jar:8.1.16.v20140903] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)[spring-web-3.2.11.RELEASE.jar:3.2.11.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)[spring-web-3.2.11.RELEASE.jar:3.2.11.RELEASE] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1484)[jetty-all-8.1.16.v20140903.jar:8.1.16.v20140903] at org.apache.activemq.web.SessionFilter.doFilter(SessionFilter.java:45)[activemq-web-5.12.1.jar:5.12.1] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1484)[jetty-all-8.1.16.v20140903.jar:8.1.16.v20140903] at org.apache.activemq.web.filter.ApplicationContextFilter.doFilter(ApplicationContextFilter.java:102)[file:/D:/apps/apache-activemq-5.12.1/webapps/admin/WEB-INF/classes/:] at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1476)[jetty-all-8.1.16.v20140903.jar:8.1.16.v20140903] at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501)[jetty-all-8.1.16.v20140903.jar:8.1.16.v20140903] at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)[jetty-all-8.1.16.v20140903.jar:8.1.16.v20140903]
原因：
因为ActiveMQ5.12在这里不支持JDK1.8的原因，导致出现上述问题！！
解决方法：
我去官方下载了ActiveMQ 5.15 ，然后5.15和JDK1.8没有这个问题！！！【我不想将JDK1.8换成1.7，所以就把ActiveMQ的版本进行更替】