项目JDK版本与Tomcat对应版本不一致引发的问题

严重: ContainerBase.addChild: start: 
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/pppp]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
	at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:649)
	at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1585)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.tomcat.util.bcel.classfile.ClassFormatException: Invalid byte tag in constant pool: 18
	at org.apache.tomcat.util.bcel.classfile.Constant.readConstant(Constant.java:131)
	at org.apache.tomcat.util.bcel.classfile.ConstantPool.(ConstantPool.java:60)
	at org.apache.tomcat.util.bcel.classfile.ClassParser.readConstantPool(ClassParser.java:209)
	at org.apache.tomcat.util.bcel.classfile.ClassParser.parse(ClassParser.java:119)
	at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2032)
	at org.apache.catalina.startup.ContextConfig.processAnnotationsJar(ContextConfig.java:1923)
	at org.apache.catalina.startup.ContextConfig.processAnnotationsUrl(ContextConfig.java:1891)
	at org.apache.catalina.startup.ContextConfig.processAnnotations(ContextConfig.java:1877)
	at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1270)
	at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:855)
	at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345)
	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
	at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5161)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	... 10 more

五月 22, 2018 10:28:11 上午 org.apache.catalina.startup.HostConfig deployDescriptor
严重: Error deploying configuration descriptor C:\Users\hp\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\conf\Catalina\localhost\pppp.xml
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/pppp]]
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:898)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
	at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:649)
	at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1585)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

五月 22, 2018 10:07:38 上午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [jsp] in context with path [/pppp] threw exception [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

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

Stacktrace:] with root cause
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

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

我eclipse和项目使用的jdk版本是1.8，tomcat是7.0版本，1.8版本编译的class不能在tomcat7上运行，so

修改项目使用的JDK版本为1.7，同时修改tomcat的运行环境为JDK1.7，重新发布，问题解决

附上tomcat官方的版本对照

Servlet Spec	JSP Spec	EL Spec	WebSocket Spec	JASPIC Spec	Apache Tomcat Version	Latest Released Version	Supported Java Versions
4.0	2.3	3.0	1.1	1.1	9.0.x	9.0.8	8 and later
3.1	2.3	3.0	1.1	1.1	8.5.x	8.5.31	7 and later
3.1	2.3	3.0	1.1	N/A	8.0.x (superseded)	8.0.52 (superseded)	7 and later
3.0	2.2	2.2	1.1	N/A	7.0.x	7.0.88	6 and later (7 and later for WebSocket)
2.5	2.1	2.1	N/A	N/A	6.0.x (archived)	6.0.53 (archived)	5 and later
2.4	2.0	N/A	N/A	N/A	5.5.x (archived)	5.5.36 (archived)	1.4 and later
2.3	1.2	N/A	N/A	N/A	4.1.x (archived)	4.1.40 (archived)	1.3 and later
2.2	1.1	N/A	N/A	N/A	3.3.x (archived)	3.3.2 (archived)	1.1 and later