java.lang.LinkageError: loader constraints violated when linking javax/el/Expres

今天使用 Maven 搭建一个项目,在pom.xml配置文件里面,加了几个jar包,.

居然报如下错误, 

 

严重: Servlet.service() for servlet jsp threw exception
java.lang.LinkageError: loader constraints violated when linking javax/el/ExpressionFactory class
 at org.apache.jsp.index_jsp._jspInit(index_jsp.java:22)
 at org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52)
 at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:159)
 at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
 at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
 at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

 

然后在maven的pom.xml文件里面找到.

<dependency>
      <groupId>javax.el</groupId>
      <artifactId>el-api</artifactId>
      <version>1.0</version>
  </dependency>

 

解决方案:

原因是tomcat的按照目录下,已经存在el-api这个jar包,导致发生冲突, 删除掉即可. 

或者你如果是lib目录中加的就直接在lib目录中，选择此el-api.jar从项目中移除..