EJB本地调用方式：把Web客户端和EJB服务端部署到同一个JBoss，客户端和服务器通过一个JVM进行通信。
Web客户端本地调用时，需引用EJB服务端打包的jar，不需引用JBoss/client下的jar和src下的jndi.properties文件，调用方式如下：
<%@ page language="java"import="java.util.*,javax.naming.*,com.tgb.ejb.*" pageEncoding="utf-8"%><%String path = request.getContextPath();String basePath = request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ path + "/";%><html><head><base href="<%=basePath%>"><title>My JSP 'index.jsp' starting page</title></head><body><%InitialContext ctx = new InitialContext();UserManager usermanager = (UserManager) ctx.lookup("UserManagerBean/local");User user = new User();user.setUsername("quwenzhe");user.setPassword("quwenzhe123");usermanager.addUser(user);out.println("userId=" + user.getId());%></body></html> 在浏览器输入客户端发布的URL地址，，JBoss会报如下异常：13:02:30,924 ERROR [[jsp]] Servlet.service() for servlet jsp threw exceptionjava.lang.ClassCastException: $Proxy96 cannot be cast to com.tgb.ejb.UserManagerat org.apache.jsp.index_jsp._jspService(index_jsp.java:79)at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)at java.lang.Thread.run(Thread.java:619) 解决方案为：在JBoss服务器的jboss-4.2.3.GA\server\default\deploy\jboss-web.deployer\META-INF路径下找到jboss-service.xml文件，把<attribute name="UseJBossWebLoader">false</attribute>的false改为true，重启JBoss，问题解决。
UseJBossWebLoader属性设置为true：表示Tomcat使用JBoss的统一类加载器作为Web应用的类加载器，这意味着WAR包中WEB-INF/classes和WEB-INF/lib目录里的类将被加载到缺省的共享类加载器仓库中。通过它，可以实现类和资源在Web应用之间共享。但是，如果这不是你想要的情况，可以通过将该属性设置为false来避免这种行为。
希望我的讲解能够帮助大家进步。
相信梦想是价值的源泉，相信眼光决定未来的一切，
