请帮忙看一下错在哪里

Question

$ javac Database.java
$ java Database
Exception in thread "main" java.lang.NoClassDefFoundError: Database (wrong name:
 SMS/Database)
        at java.lang.ClassLoader.defineClass0(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:11
1)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java, Compiled Cod
e)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)

Answer 1

下面是我在JSP页面里报的错：
java.sql.SQLException: No connection/statement established yet
at com.informix.util.IfxErrMsg.getSQLException(IfxErrMsg.java:239)
at com.informix.jdbc.IfxResultSet.getMetaData(IfxResultSet.java, Compiled Code)
at com.informix.jdbc.IfxResultSet.findColumn(IfxResultSet.java, Compiled Code)
at com.informix.jdbc.IfxResultSet.getString(IfxResultSet.java, Compiled Code)
at org.apache.jsp.test$jsp._jspService(test$jsp.java, Compiled Code)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java, Compiled Code)
at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled Code)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java, Compiled Code)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java, Compiled Code)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java, Compiled Code)
at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled Code)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java, Compiled Code)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java, Compiled Code)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java, Compiled Code)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java, Compiled Code)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java, Compiled Code)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java, Compiled Code)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java, Compiled Code)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java, Compiled Code)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java, Compiled Code)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java, Compiled Code)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java, Compiled Code)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java, Compiled Code)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java, Compiled Code)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java, Compiled Code)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java, Compiled Code)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java, Compiled Code)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java, Compiled Code)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java, Compiled Code)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java, Compiled Code)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java, Compiled Code)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java, Compiled Code)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java, Compiled Code)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java, Compiled Code)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java, Compiled Code)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java, Compiled Code)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java, Compiled Code)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125)
at java.lang.Thread.run(Thread.java, Compiled Code)

Answer 2

java.sql.SQLException: No connection/statement established yet
at com.informix.util.IfxErrMsg.getSQLException(IfxErrMsg.java:239)

Answer 3

javac sms/database.java
java SMS.Database

Answer 4

将代码都放到main方法里试验看看行不行吧,如果不行那就是驱动的问题了吧,个人意见!