关于Weblogic部署Java项目的程序包冲突问题的解决方案

我们可以使用各种应用程序服务（例如Tomcat，WAS，weblogic等）来部署Java应用程序. Tomcat和WAS可能会遇到较少的奇怪问题，但是当使用weblogic部署项目时weblogic部署项目 文件夹没有成功，我们经常会遇到一些奇怪但常见的问题，例如程序包冲突和路径问题.

今天，我将讨论Weblogic部署Java项目包冲突. 让我举个例子:

在Weblogic中部署Java项目后，它开始运行时没有任何错误，也没有任何异常. 但是当我操作一个函数时，页面是错误的:

此错误是在后台报告的:

Root cause of ServletException.
java.lang.LinkageError: loader constraint violation: loader (instance of weblogic/utils/classloaders/ChangeAwareClassLoader) 
previously initiated loading for a different type with name "javax/xml/namespace/QName"
  at java.lang.ClassLoader.defineClass1(Native Method)
  at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
  at weblogic.utils.classloaders.GenericClassLoader.defineClass(GenericClassLoader.java:343)
  at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:302)
  at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:270)
  at weblogic.utils.classloaders.ChangeAwareClassLoader.findClass(ChangeAwareClassLoader.java:64)
  at weblogic.utils.classloaders.ChangeAwareClassLoader.loadClass(ChangeAwareClassLoader.java:49)
  at java.lang.Class.getDeclaredMethods0(Native Method)
  at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
  at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
  at java.lang.Class.getMethod0(Class.java:3018)
  at java.lang.Class.getMethod(Class.java:1784)
  at org.apache.xmlbeans.XmlBeans.buildMethod(XmlBeans.java:174)
  at org.apache.xmlbeans.XmlBeans.buildNoArgMethod(XmlBeans.java:190)
  at org.apache.xmlbeans.XmlBeans.buildGetContextTypeLoaderMethod(XmlBeans.java:200)
  at org.apache.xmlbeans.XmlBeans.<clinit>(XmlBeans.java:126)
  at org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbook$Factory.newInstance(Unknown Source)
  at org.apache.poi.xssf.usermodel.XSSFWorkbook.onWorkbookCreate(XSSFWorkbook.java:290)
  at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:170)
  at com.kayak.web.base.util.export.ExportExcelXSSF.export(ExportExcelXSSF.java:893)
  at com.kayak.web.base.action.ExportExcelAction.exportExcel(ExportExcelAction.java:318)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
  at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
  at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
  at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777)
  at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706)
  at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
  at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
  at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
  at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
  at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
  at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
  at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
  at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
  at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)
  at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
  at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
  at com.kayak.web.user.filter.LoginCertifyFilter.doFilter(LoginCertifyFilter.java:125)
  at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
  at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
  at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
  at com.kayak.web.base.filter.LocalRequestFilter.doFilter(LocalRequestFilter.java:28)
  at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
  at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
  at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
  at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3748)
  at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3714)
  at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
  at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
  at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2283)
  at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2182)
  at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1499)
  at weblogic.work.ExecuteThread.execute(ExecuteThread.java:263)
  at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)

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