jsp求高手解决2011-10-811:44:05org.apache.catalina.core.StandardWrapperValveinvoke严重:Servlet.service()forservletjspthrewexceptionjava.lang.NullPointerException atorg.apache.jsp.main_005fuser_jsp._jspService...

jdbcJavacodepublicResultSetgetList(){ResultSetrs=null;Statementstmt=null;Connectioncon=null;con=this.dbC.getConnection();if(con!=null){try{stmt=con.createStatement();if(stmt!=null){rs=stmt.executeQuer...

怎么会空指针异常？代码如下：try{department=request.getParameter("department");Stringclassforname="sun.jdbc.odbc.JdbcOdbcDriver";Stringurl="jdbc:odbc:Driver={MicrosoftExcelDriver(*.xls)};DBQ...

getHibernateTemplate().find(hql,username);17719.html'>空指针各位大神，出现这个问题困扰我一天了，小弟实在无力，逛遍所有贴吧，无人能答，寄希望于此了。spring配置<!--事务管理器的配置--> <beanid="transactionManager"class="org.springframework.orm.hiberna...

多次重复提交表单出现错误？其他一切正常？tomcat提示:....多次重复提交表单出现错误？其他一切正常？tomcat提示:....newConnection<>:[Microsoft][SQLServer2000driverforjdbc]Errorestablishingsocket.jsp页面提示：java.lang.NullPointerException org.apache...

数据库连接关闭错误！java.lang.NullPointerException1.如标题所示，我在关闭数据库资源时报出了这个错误，请大家分析一下问题在哪里。2.关于关闭连接，在什么时候关闭比较合适？color='#e78608'>------解决方案--------------------shutdownabort;startuprestrict;shutdownimmediate;color=...

我用jbuilder写的一个登陆login.jsp怎么老是出现错误？错误提示：exceptionorg.apache.jasper.JasperExceptionorg.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)org.apache.jasper.servlet.JspServlet.ser...

求助JSP错误HTTPStatus500---------------------------------------------typeExceptionreportmessagedescriptionTheserverencounteredaninternalerror()thatpreventeditfromfulfillingthisrequest.exceptionorg.apache....

javamail?在编译代码时出现以下错误,请问那有问题呢?org.apache.jasper.JasperException org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspS...

jsp+sql的动态网页，大家看看，这个是什么错误？是sql的问题吗？还是环境变量的设置问题？typeExceptionreportmessagedescriptionTheserverencounteredaninternalerror()thatpreventeditfromfulfillingthisrequest.exceptionorg.apache.jasper.JasperExcep...

jsp网站发部问题HTTPStatus500---------------------------------------------typeExceptionreportmessagedescriptionTheserverencounteredaninternalerror()thatpreventeditfromfulfillingthisrequest.exceptionorg.apach...

递归调用时，出现了17719'>空指针publicclassSearchPicture{ publicstaticvoidmain(Stringargs[]){ Filef=newFile("E:"); tree(f); } publicstaticvoidtree(Filef){ String[]s=null; File[]trees=f.listFiles()...

求教高手,为何会出现17719'>空指针为了表述清楚,我把代码简化了下大致是这样 Map<String,Integer>map=newHashMap<String,Integer>(); Stringstr="GGG"; Integeri=Math.random()*10>7?5:null; System.out.println(i); map.put(...

求前辈解决一下空指针异常的问题哈！！谢谢@SuppressWarnings("unused") @Override publicintcompair(Stringusername){ Vector<String>items=newVector<String>(); Connectionconn; PreparedStatementps=null; String[]n...

在做磁盘文件搜索的时候出现了17719'>空指针!本帖最后由qiumin333于2012-12-1421:56:56编辑importjava.io.File;importjava.io.IOException;publicclassSearchfilm{ publicstaticvoidmain(String[]args)throwsIOException{ Stringpath="E:/"; ...

Method.invoke()17719'>空指针，怎么调呢？Javacodetry{System.out.println(columnType.substring(columnType.lastIndexOf(".")+1));setMethods.get(columnName).invoke(obj,newObject[]{rsCls.getMethod("get...

ORACLE中调用JAVASOURCE，无法读取中文路径代码如下：createtabledirlist(filenamevarchar2(255),filesizenumber,filedatedate);createorreplaceandcompilejavasourcenameddirlistasimportjava.io.*;importjava.sql.*;publicclassDirL...

Error500--InternalServerErrorError500--InternalServerErrorjava.lang.NullPointerExceptionatbo.LoginBo.verifyUser(LoginBo.java:37)atstruts.action.LoginAction.getActionForward(LoginAction.java:35)atstrut...

关于Comparable与compareToimportjava.math.BigInteger;importjava.util.Arrays;publicclassLottery{ publicString[]sortByOdds(String[]rules) { Ticket[]tickets=newTicket[rules.length]; for(inti=0;i<rules.l...

空指针异常问题！！！javaintport=1025;port=Integer.parseInt(text_port.getText());此处代码出现异常：Exceptioninthread"main"java.lang.NullPointerException atok.Cshell.createSShell(Cshell.java:126)---->port=Int...