关于ejb中异常javax.naming.NoInitialContextException的处理办法
2007-09-25 09:16
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有时候EJB程序在运行时会出现如下异常信息:
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javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:640)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:243)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:280)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at examples.HelloClient.main(HelloClient.java:31)
Exception in thread "main"
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这样的异常经常发生在java.naming.Context.lookup()方法上,原因是在于异常信息中的java.naming.factory.initial在不同的EJB容器中有不同的含义(初始化上下文工厂),
在weblogic81中它代表的是weblogic.jar中weblogic.jndi.WLInitialContextFactory类
处理办法有两个:
1.在运行程序时使用命令:java -Djava.naming.factory.initial=weblogic.jndi.WLInitialContextFactory
2.需要在程序中补充这样的语句:
Properties props = System.getPropjerties();
props.put(InitialContext.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
Context ctx = new InitialContext(props);
有时EJB程序可能还需要另一个参数java.naming.provider.url,处理办法如上面类似:
1.在运行程序时使用命令:java -Djava.naming.factory.initial=weblogic.jndi.WLInitialContextFactory
2.在程序中指定prop.setProperty("Context.PROVIDER_URL", "t3://127.0.0.1:7001");
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javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:640)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:243)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:280)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at examples.HelloClient.main(HelloClient.java:31)
Exception in thread "main"
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这样的异常经常发生在java.naming.Context.lookup()方法上,原因是在于异常信息中的java.naming.factory.initial在不同的EJB容器中有不同的含义(初始化上下文工厂),
在weblogic81中它代表的是weblogic.jar中weblogic.jndi.WLInitialContextFactory类
处理办法有两个:
1.在运行程序时使用命令:java -Djava.naming.factory.initial=weblogic.jndi.WLInitialContextFactory
2.需要在程序中补充这样的语句:
Properties props = System.getPropjerties();
props.put(InitialContext.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
Context ctx = new InitialContext(props);
有时EJB程序可能还需要另一个参数java.naming.provider.url,处理办法如上面类似:
1.在运行程序时使用命令:java -Djava.naming.factory.initial=weblogic.jndi.WLInitialContextFactory
2.在程序中指定prop.setProperty("Context.PROVIDER_URL", "t3://127.0.0.1:7001");
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