org.apache.jasper.JasperException: Unable to compile class for JSP:

环境： jdk1.8    maven  tomcat7-maven-plugin  2.0

原因： tomcat7-maven-plugin  2.0 不知吃 jdk 1.8，换成 tomcat7-maven-plugin  2.2就行，即

<plugin>
				<groupId>org.apache.tomcat.maven</groupId>
				<artifactId>tomcat7-maven-plugin</artifactId>
				<version>2.2</version>
				</configuration>
			</plugin>

org.apache.jasper.JasperException: Unable to compile class for JSP: 

An error occurred at line: 1 in the generated java file
The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files

Stacktrace:
	org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:102)
	org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:331)
	org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:457)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
	org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264)
	org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1201)
	org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:986)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:933)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:851)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)