javax.servlet.ServletException cannot be resolved to a type错误解决方法
2017-03-24 17:13
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javax.servlet.ServletException cannot be resolved to a type错误解决方法
在页面中使用全局路径时${pageContext.request.contextPath}出现javax.servlet.ServletException cannot be resolved to a type错误,解决方法如下:这个错误主要是因为缺少jsp-api.jar 和 servlet-api.jar这两个Jar包。
第一种解决方法:
直接把 Tomcat7.0 下lib目录中的 jsp-api.jar 添加 Build path 中。
第二种解决方法:
使用 Maven 将 jsp-api.jar 和 servlet-api.jar 一起添加到项目中,
需要注意的是使用 Maven 加入的jar <scope>test</scope> 需要设置为test
jar包不能够随工程一起发布,默认没有配置 scope 表示随项目一起发布。
因为项目最终要发布到Tomcat下运行,而Tomcat自身就具有这两个jar包,如果随
项目发布的话项目提供的2个jar会和Tomcat自身的2个Jar冲突,会抛出 NullPintException
或者用maven:
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
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