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

解决Jsp运行org.apache.jasper.JasperException: Unable to compile class for JSP:问题

初学Maven就遇到困难了！！！在b站跟着视频开始接触maven来创建一个webapp项目，在jsp跳转的时候遇到一个bug，身边也没大佬带，只能自己慢慢摸索，在Maven项目中出现了报org.apache.jasper.JasperException: Unable to compile class for JSP:的问题，在网上查了很多方法来尝试解决，但天资愚钝无法理解大佬的跳转思维，后面某论坛看到解决放方案。

链接：/u011781521/article/details/53713162

一、问题描述

eclipse通过maven插件创建一个WEB项目通过内嵌Tomcat加载项目，启动没问题，一访问页面就报错提示无法将jsp编译为class文件:

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

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:

org.piler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)

org.piler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)

org.piler.JDTCompiler.generateClass(JDTCompiler.java:439)

org.pile(Compiler.java:349)

org.pile(Compiler.java:327)

org.pile(Compiler.java:314)

org.apache.pile(JspCompilationContext.java:592)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)

javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

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错误的原因为：tomcat6不支持jdk1.8版本

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我pom.xml文件里明明配置的是Tomcat7啊!! 怎么是tomcat6运行去了。。。

<?xml version="1.0" encoding="UTF-8"?><project xmlns="/POM/4.0.0" xmlns:xsi="/2001/XMLSchema-instance"xsi:schemaLocation="/POM/4.0.0 /xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.itheima</groupId><artifactId>maven_java</artifactId><version>1.0-SNAPSHOT</version><packaging>war</packaging><name>maven_java Maven Webapp</name><!-- FIXME change it to the project's website --><url></url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><piler.source>1.7</piler.source><piler.target>1.7</piler.target></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><scope>test</scope></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version><scope>provided</scope></dependency><!-- /artifact/javax.servlet.jsp/jsp-api --><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.1</version><scope>provided</scope></dependency></dependencies><build><finalName>maven_java</finalName><pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --><plugins><plugin><artifactId>maven-clean-plugin</artifactId><version>3.1.0</version></plugin><!-- see /ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --><plugin><artifactId>maven-resources-plugin</artifactId><version>3.0.2</version></plugin><plugin><artifactId>maven-compiler-plugin</artifactId><version>3.8.0</version></plugin><plugin><artifactId>maven-surefire-plugin</artifactId><version>2.22.1</version></plugin><plugin><artifactId>maven-war-plugin</artifactId><version>3.2.2</version></plugin><plugin><artifactId>maven-install-plugin</artifactId><version>2.5.2</version></plugin><plugin><artifactId>maven-deploy-plugin</artifactId><version>2.8.2</version></plugin><plugin><groupId>org.apache.tomcat.maven</groupId><artifactId>tomcat7-maven-plugin</artifactId><version>2.2</version></plugin></plugins></pluginManagement></build></project>

注意: 如果你的版本是tomcat7-maven-plugin 2.0 的话，由于它不支持 jdk 1.8，所以把它换成 tomcat7-maven-plugin 2.2就行了。

二、解决方法

找了下发现原来是这里出了问题!!!

把它改为: tomcat7:run 就行了，就不会报错了