1、新公司所使用的资料都共享在自己的bbs 上bbs 和 邮件服务器 以及 ftp 服务器使用***
问题：公司的ftp 服务器是用来做什么的？为什么需要单独有个ftp服务器？
2、 根据bbs 里面的资源共享 了解几个问题
a) 目前公司所使用到的技术
b) 公司的主营业务，看前人例子
c) 所使用的环境
weblogic？
tuxedo？
3、 公司的电脑为什么没有安装 杀毒软件？
4、 weblogic 是一个中间件？那我们所连接的数据库是多送，用户民和密码呢？
作为一个公司新入职的员工，我迫切的需要搞清几个问题
1、该公司所使用的相关软件是什么？这些软件都有什么用处？与公司的主营业务有什么关系？
2、我所负责的工作所需要使用的环境搭建？
根据检查我的电脑发现，我的电脑已经安装了软件有
WebLogic
MySQL
Eclipse
异常描述：
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:662)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:307)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:344)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at SqlDsDemo.queryJNDI(SqlDsDemo.java:23)
at SqlDsDemo.main(SqlDsDemo.java:64)
错误原因：未设置环境变量
解决方法：
final String INIT_FACTORY = "weblogic.jndi.WLInitialContextFactory";
final String SERVER_URL = "t3://localhost:7001";
Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY, INIT_FACTORY);
props.put(Context.PROVIDER_URL, SERVER_URL);
Context ctx = new InitialContext(props);
异常描述：
can't connect the WebLogic t3://localhost:7001
javax.naming.NoInitialContextException: Cannot instantiate class: weblogic.jndi.WLInitialContextFactory [Root exception is java.lang.ClassNotFoundException: weblogic.jndi.WLInitialContextFactory]
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:674)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:307)
at javax.naming.InitialContext.init(InitialContext.java:242)
at javax.naming.InitialContext.<init>(InitialContext.java:216)
at SqlDsDemo.getInitialContext(SqlDsDemo.java:72)
at SqlDsDemo.queryJNDI(SqlDsDemo.java:22)
at SqlDsDemo.main(SqlDsDemo.java:84)
Caused by: java.lang.ClassNotFoundException: weblogic.jndi.WLInitialContextFactory
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at com.sun.naming.internal.VersionHelper12.loadClass(VersionHelper12.java:63)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:671)
... 6 more
Exception in thread "main" java.lang.NullPointerException
at SqlDsDemo.queryJNDI(SqlDsDemo.java:23)
at SqlDsDemo.main(SqlDsDemo.java:84)
错误原因：找不到WebLogic 的实例化类，工程未加载 weblogic.jar 包
解决方法：
可以从网上下载 weblogic.jar 包，然后将其导入 classpath
javax.naming.NameNotFoundException: Unable to resolve 'java:MySqlDS'. Resolved '' [Root exception is javax.naming.NameNotFoundException: Unable to resolve 'java:MySqlDS'. Resolved '']; remaining name 'java:MySqlDS'
at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:108)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:284)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:244)
at weblogic.jndi.internal.ServerNamingNode_812_WLStub.lookup(Unknown Source)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:343)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:336)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at SqlDsDemo.queryJNDI(SqlDsDemo.java:23)
at SqlDsDemo.main(SqlDsDemo.java:84)
Caused by: javax.naming.NameNotFoundException: Unable to resolve 'java:MySqlDS'. Resolved ''
at weblogic.jndi.internal.BasicNamingNode.newNameNotFoundException(BasicNamingNode.java:1139)
at weblogic.jndi.internal.BasicNamingNode.lookupHere(BasicNamingNode.java:252)
at weblogic.jndi.internal.ServerNamingNode.lookupHere(ServerNamingNode.java:182)
at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:206)
at weblogic.jndi.internal.RootNamingNode_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:695)
at weblogic.rmi.cluster.ClusterableServerRef.invoke(ClusterableServerRef.java:230)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:520)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:146)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:516)
at weblogic.rmi.internal.wls.WLSExecuteRequest.run(WLSExecuteRequest.java:118)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
Exception in thread "main" java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:476)
at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:181)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:223)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:476)
at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:181)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at weblogic.utils.classloaders.GenericClassLoader.findOrCreateSingleSourceClass(GenericClassLoader.java:640)
at weblogic.rmi.internal.StubGenerator.getStubOnClient(StubGenerator.java:782)
at weblogic.rmi.internal.StubGenerator.getStubClass(StubGenerator.java:758)
at weblogic.rmi.internal.StubGenerator.generateStub(StubGenerator.java:803)
at weblogic.rmi.internal.StubGenerator.generateStub(StubGenerator.java:790)
at weblogic.rmi.extensions.StubFactory.getStub(StubFactory.java:79)
at weblogic.rmi.utils.io.RemoteObjectReplacer.resolveObject(RemoteObjectReplacer.java:237)
at weblogic.rmi.internal.StubInfo.readResolve(StubInfo.java:142)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at java.io.ObjectStreamClass.invokeReadResolve(ObjectStreamClass.java:1104)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1807)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at weblogic.common.internal.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:119)
at weblogic.rjvm.MsgAbbrevInputStream.readObject(MsgAbbrevInputStream.java:112)
at weblogic.rmi.internal.ObjectIO.readObject(ObjectIO.java:56)
at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:159)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:285)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:244)
at weblogic.jdbc.common.internal.RmiDataSource_1211_WLStub.getConnection(Unknown Source)
at SqlDsDemo.queryJNDI(SqlDsDemo.java:25)
at SqlDsDemo.main(SqlDsDemo.java:84)
异常描述：
Exception in thread "main" java.lang.NoClassDefFoundError: weblogic/security/subject/AbstractSubject
at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:117)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:684)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:307)
at javax.naming.InitialContext.init(InitialContext.java:242)
at javax.naming.InitialContext.<init>(InitialContext.java:216)
at QueueMessageSender.getInitialContext(QueueMessageSender.java:51)
at QueueMessageSender.sendMessage(QueueMessageSender.java:23)
at QueueMessageSender.main(QueueMessageSender.java:65)
Caused by: java.lang.ClassNotFoundException: weblogic.security.subject.AbstractSubject
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 8 more
解决方法：
导入包 wlclient.jar
异常描述：
Exception in thread "main" java.lang.NoClassDefFoundError: weblogic/security/acl/UserInfo
at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:117)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:684)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:307)
at javax.naming.InitialContext.init(InitialContext.java:242)
at javax.naming.InitialContext.<init>(InitialContext.java:216)
at QueueMessageSender.getInitialContext(QueueMessageSender.java:51)
at QueueMessageSender.sendMessage(QueueMessageSender.java:23)
at QueueMessageSender.main(QueueMessageSender.java:65)
Caused by: java.lang.ClassNotFoundException: weblogic.security.acl.UserInfo
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 8 more