java.lang.LinkageError: loader constraints violated when linking javax/el/ExpressionFactory class
2015-12-02 00:14
639 查看
启动Tomcat后,访问JSP时(使用的是MyEclipse自带的Tomcat,是6.0的版本),报错:
Caused by: java.lang.LinkageError: loader constraints violated when linking javax/el/ExpressionFactory class
at org.apache.jsp.WEB_002dINF.jsp.UserAction.loginUI_jsp._jspInit(loginUI_jsp.java:39)
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:320)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
... 40 more
或
java.lang.LinkageError: loader constraint violation: when resolving interface method "javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current
class, org/apache/jsp/index_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspApplicationContext, have different Class objects for the type javax/el/ExpressionFactory used in the
signature
org.apache.jsp.index_jsp._jspInit(index_jsp.java:23)
org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:159)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:88)
说明:原因是Jbpm的juel.jar, juel-engine.jar, juel-impl.jar包和Tomcat6.0中的el-api.jar包冲突了。
有三个解决办法:
1,方法一:换成tomcat5.5,就没有问题了。
2,方法二:在MyEclipse的Preferences -> MyEclipse -> Application Servers -> Tomcat -> .. -> Paths 中配置 Append to classpath,选中 juel.jar, juel-engine.jar, juel-impl.jar 这三个jar包就可以了。
3,方法三:将 juel.jar, juel-engine.jar, juel-impl.jar 这三个包复制到tomcat6下 lib/ 中,并删除原来的el-api.jar,
切记还要把工程中 WEB-INF\lib 下的 juel.jar, juel-engine.jar, juel-impl.jar 删除,不然还是要冲突。
Caused by: java.lang.LinkageError: loader constraints violated when linking javax/el/ExpressionFactory class
at org.apache.jsp.WEB_002dINF.jsp.UserAction.loginUI_jsp._jspInit(loginUI_jsp.java:39)
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:320)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
... 40 more
或
java.lang.LinkageError: loader constraint violation: when resolving interface method "javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current
class, org/apache/jsp/index_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspApplicationContext, have different Class objects for the type javax/el/ExpressionFactory used in the
signature
org.apache.jsp.index_jsp._jspInit(index_jsp.java:23)
org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:159)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:88)
说明:原因是Jbpm的juel.jar, juel-engine.jar, juel-impl.jar包和Tomcat6.0中的el-api.jar包冲突了。
有三个解决办法:
1,方法一:换成tomcat5.5,就没有问题了。
2,方法二:在MyEclipse的Preferences -> MyEclipse -> Application Servers -> Tomcat -> .. -> Paths 中配置 Append to classpath,选中 juel.jar, juel-engine.jar, juel-impl.jar 这三个jar包就可以了。
3,方法三:将 juel.jar, juel-engine.jar, juel-impl.jar 这三个包复制到tomcat6下 lib/ 中,并删除原来的el-api.jar,
切记还要把工程中 WEB-INF\lib 下的 juel.jar, juel-engine.jar, juel-impl.jar 删除,不然还是要冲突。
相关文章推荐
- CI框架源码完全分析之核心文件(异常处理)Exceptions.php
- java.lang.NoClassDefFoundError: org/apache/log4j/Level
- Java Basics Part 19/20 - Exceptions
- 各种语言版本的抛出异常Exceptions
- redis.clients.jedis.exceptions.JedisDataException
- java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
- java并发基础--线程
- Struts2技术内幕----深入解析Struts2架构与设计(一)
- javac 和java 使用的 -classpath 参数
- Java数据库连接之配置ODBC数据源
- spring mvc 学习笔记01
- myeclipse10配置maven
- dart语言 (一) helloworld
- 通过Maven创建SprinvMVC项目
- Java代理系列-动态代理热身
- JAVA基础之注解
- Java final 关键字
- Java配置环境变量
- Spring Quartz与Spring Task总结
- 如何手动用Eclipse默认的keystore导出安卓应用