我想说java技术真烂！

<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%><html> <body>
<% Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String url = "jdbc:odbc:dan";
Connection conn= DriverManager.getConnection(url,"dba","sql");
Statement stmt=conn.createStatement();
String sql = " select * from dan1 ";
ResultSet rs=stmt.executeQuery(sql);
while(rs.next()) {
out.println("sdfa" + rs.getstring(1));
out.println("asdfaf" + rs.getstring(2));
out.println("sdfa" + rs.getstring(1));
out.println("asdfaf" + rs.getstring(2));
}%>
<%out.println("数据库操作成功，恭喜你");%>
<%rs.close();
stmt.close();
conn.close();
%> </body> </html>
源文件如上：
出错提示如下:org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 6 in the jsp file: /dbexample6.jspGenerated servlet error:
    [javac] Compiling 1 source fileE:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\_\dbexample6_jsp.java:53: cannot resolve symbol
symbol  : method getstring  (int)
location: interface java.sql.ResultSet
out.println("sdfa" + rs.getstring(1));
                       ^An error occurred at line: 6 in the jsp file: /dbexample6.jspGenerated servlet error:
E:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\_\dbexample6_jsp.java:54: cannot resolve symbol
symbol  : method getstring  (int)
location: interface java.sql.ResultSet
out.println("asdfaf" + rs.getstring(2));
                         ^An error occurred at line: 6 in the jsp file: /dbexample6.jspGenerated servlet error:
E:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\_\dbexample6_jsp.java:55: cannot resolve symbol
symbol  : method getstring  (int)
location: interface java.sql.ResultSet
out.println("sdfa" + rs.getstring(1));
                       ^An error occurred at line: 17 in the jsp file: /dbexample6.jspGenerated servlet error:
E:\Program Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\_\dbexample6_jsp.java:56: cannot resolve symbol
symbol  : method getstring  (int)
location: interface java.sql.ResultSet
out.println("asdfaf" + rs.getstring(2));
                         ^
4 errors
at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:120)
at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:293)
at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:313)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:324)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:474)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:184)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:289)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:380)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
at java.lang.Thread.run(Thread.java:536)

但是我把出错二句删掉之后，还出错：
提示如下:
org.apache.jasper.JasperException: General error
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:248)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:289)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:380)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
at java.lang.Thread.run(Thread.java:536)
root cause javax.servlet.ServletException: General error
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:497)
at org.apache.jsp.dbexample6_jsp._jspService(dbexample6_jsp.java:65)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:136)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:204)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:289)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:380)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
at java.lang.Thread.run(Thread.java:536)就这么几个破代码，错误不断
我真受不了了，研究了半个月，就是找不出错来，tomcat,也真是个烂玩意，又没中文教材，所以我说java技术真是烂，相关的产品这么多，这么杂，用起来这么费劲，不久的将来，我看java就玩完了，从微软的产品转向java看来是错了，可惜浪费了我半年的时间！！

appache,weblogic,webspere没有一样有中文的教材，想在书店买书也买不着，jbuilder的书，大多也是4.0,5.0!
虽说不可能一开始就什么都行，可也不能什么也不行啊，学习配了一个多月，什么也配不出来，最多向屏幕打个helloworld成功过一次，其他，什么jbuilder配weblogic,appache配tomcat什么也不配不成，现在好了，只用tomcat,居然也不成！11
能不急吗？？？？

你把ResultSet.getString(int column);写成getstring()了。java区分大小写。其实java刚接触觉得是很变态，不过入了门，会觉得他还是很可爱的。努力把。都要经历这个过程的。

倒~~~~都告诉你“rs.getstring”错了啊！
应该是“rs.getString”！
大小写哟！

首先，是java区分大小写，因此方法名getstring写错
其次，没有使用try ... catch

out.println("sdfa" + rs.getString(1));
out.println("asdfaf" + rs.getString(2));
out.println("sdfa" + rs.getString(1));
out.println("asdfaf" + rs.getString(2));
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
这种写法应该不行的，要数据库字段的顺序，并且不可以重读字段！！

我最讨厌的就是java里面狗屎一样长的函数名，打得我手都酸了，还有就是swing编程，，累阿

如果你用的是象jbuilder这样的开发工具的话，可以通过 Ctrl+Space实现自动完成

你可以用些ide开发工具。如IntelliJ IDEA、Eclipse
可以减轻不必要的负担。

java的配置确实很烦，从jdk的classpath到tomcat,apache再就是jbuilder，从来就没一次装了可以用过。

你用jcreater也会给出提示阿，不用自己打函数名
相对的，你用别的语言开发，如果没有提示不是一样麻烦？

我觉得java不好用还是因为配套的工具不好!

看来真正的程序员都是要用中文的IDE、中文的错误提示、中文的程式书、中文的建议：你还是等键盘都变成中文的时候再做code罢了。错了，到时候就不是写code，而是念中文语句出来了。

真实一个容易放弃的人,估计微软的你也学不好,才想起来学java吧.不如去干些更适合你的工作.......男怕入错行.

有点同感，学习配置了jbuilber7.0+weblogic7.0一个月了，什么也不会，表面上好像是配置好的，但不会用。哎，java或者真是太强大了，也是真的难入门呀。不过，我没有放弃。

大哥
是getString而不是getstring！
气死我了

我本来以为你有什么高见,原来是程序调不出来发牢骚,
出错也就罢了,还出这个级数的错误,佩服,有档次
你以前是做ASP的吧,那个是部分大小写的

这就闲麻烦了,以后用UNIX时全手工配置还不翘翘了

呵呵，还是要有点耐性，昨天弄哪个SERVLET，弄得半死，后来终于成功，关键还是看错误代码，然后找原因，呵呵！

不是Java太烂，而是你现在的水平太烂，继续努力吧，会成功的。

看来Java是有一定的档次的，学的人也应该是有一定的档次的才行呀。
呵呵~~~开玩笑~~~

既然java这么烂，你还学它干什么，也许回家种地会很适合你的！
努力！

你说的不错！
java技术真烂！不过前面应加主语
你的java技术真烂！

Java is good,
but your skill maybe is poor,
don't give up,
pls try again,
success will come to you!
^_^

哈哈，兄弟们不要这样嘛，大家不要把我的技术烂和java烂联系起来，没有什么联系的。我不会放弃java的

调试易

我想说java技术真烂！

解决方案 »