Question

InitialContext中的NullPointerException

private void connect() {
 try {
    InitialContext ctx = new InitialContext();
    IServerBean serverBean = (IServerBean)ctx.
       lookup("java:global/applicationserver/ServerBean!
       com.test.applicationserver.IServerBean");
 } catch (NamingException  e) {
    logger.error(e.getMessage(), e);
   }
}

尝试通过控制台java -cp cleint-0.0.1-SNAPSHOT-jar-with-dependencies.jar com.test.client.EJBClient执行客户端应用程序时出现此异常：

java.lang.NullPointerException
at com.sun.enterprise.naming.impl.SerialContext.<init>(SerialContext.java:276)
at com.sun.enterprise.naming.impl.SerialContext.<init>(SerialContext.java:335)
at com.sun.enterprise.naming.impl.SerialInitContextFactory.createInitialContext
(SerialInitContextFactory.java:358)
at com.sun.enterprise.naming.impl.SerialInitContextFactory.getInitialContext
(SerialInitContextFactory.java:353)
at com.sun.enterprise.naming.SerialInitContextFactory.getInitialContext
(SerialInitContextFactory.java:69)
at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.init(Unknown Source)
at javax.naming.InitialContext.<init>(Unknown Source)
at com.test.client.EJBClient.connect(EJBClient.java:33)
at com.test.client.EJBClient.main(EJBClient.java:61)

此应用程序连接到远程EJB模块。但是当我尝试在Eclipse中执行它时，一切都很顺利。我的配置：

Java SE 1.7
GlassFish Server开源版3.1.2.2（版本5）
适用于Web开发人员的Eclipse Java EE IDE。版本：Juno服务版本 1构建ID：20121004-1855

Maven依赖项：

<dependencies>
    <dependency>
        <groupId>com.sun</groupId>
        <artifactId>tools</artifactId>
        <version>1.4.2</version>
        <scope>system</scope>
        <systemPath>C:\Java\jdk1.7.0_11\lib\tools.jar</systemPath>
    </dependency>
    <dependency>
        <groupId>org.glassfish.main.extras</groupId>
        <artifactId>javaee</artifactId>
        <version>3.1.2.2</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.appclient</groupId>
        <artifactId>gf-client</artifactId>
        <version>3.1.1</version>
    </dependency>
</dependencies>

Answer 1

我遇到了同样的问题。解决：您必须不仅在项目的类路径中添加gf-client.jar和appserv-rt.jar，还要在运行时添加（使用Eclipse，请参阅运行方式＆gt;运行配置＆gt;类路径＆gt;添加罐子。）

Answer 2

我用这个解决方案解决了这个问题：

使用应用程序将此库添加到文件夹：

glassfish-embedded-all-3.1.1.jar hk2-core-1.6.9.jar
internal-api-3.1.2.2.jar
共util的-3.1.2.2.jar
与GlassFish CORBA的内部API-3.2.0-b005.jar
的glassfish命名-3.1.2.2.jar

运行应用程序时，将此库添加到classpath：

java -cp glassfish-embedded.jar;hk2-core.jar;internal-api.jar;common-util.jar;glassfish-corba-internal-api.jar;glassfish-naming.jar;cleintconsole-0.0.1-SNAPSHOT-jar-with-dependencies.jar com.test.client.EJBClient

InitialContext中的NullPointerException

2 个答案: