(如图)javaweb eclipse的http500错误是怎么回事 5C

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本人初学,希望各位耐心仔细解答

4个回答

数据库链接异常。确保你配置的数据量链接信息正确。
还有你登陆的用户权限够不够,
错误信息有两点,第一是链接数据库异常,链接不上,第二是,拒绝了链接。

应该是MySQL 连接的问题,排查方向:1、如果是本机MySQL 数据库,检查MySQL 服务是否开启,连接配置信息是否正确
2、如果是远程检查root 帐号是否允许远程访问。

检查你的连接的 数据库 是否已经启动或者正常运行;;检查你的配置文件里面 数据库的地址,方言,端口这些是否写正确了;应该可以排除账号密码错误的问题,这里报错是连接被拒绝;

数据库连接异常 ,应该是你整合的时候注入的bean有问题,检查下datascose

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<%@page import="java.sql.Statement"%>rn<%@page import="com.sun.org.apache.xml.internal.security.Init"%>rn<%@page import="java.sql.ResultSet"%>rn<%@page import="java.sql.SQLException"%>rn<%@page import="java.sql.DriverManager"%>rn<%@page import="java.sql.Connection"%>rn<%@ page language="java" contentType="text/html; charset=UTF-8"rn pageEncoding="UTF-8"%>rnrnrnrn rn 用结果集ResultSet存储查询的数据,并用其next()方法循环读出rnrnrn <%rn String url="jdbc:mysql//localhost:3306/javaweb";//链接数据库的URLrn String user="root";//数据库用户名rn String password="1234";//数据库密码rn Connection conn=null;//链接数据库对象rn tryrn Class.forName("com.mysql.jdbc.Driver");//加载驱动rn conn = DriverManager.getConnection(url,user,password);//链接数据库rn rn catch(ClassNotFoundException e)rn out.println("找不到驱动类");rn catch(SQLException e)rn out.println("链接数据库失败");rn rn tryrn Statement stmt = conn.createStatement();rn String queryAll="select * from user;";rn ResultSet rs = stmt.executeQuery(queryAll);rn while(rs.next())rn int userid = rs.getInt(1);rn String username = rs.getString(2);rn String userpassword = rs.getString(3);rn out.println("用户id"+userid+",");rn out.println("用户名"+username+",");rn out.println("密码"+userpassword+" "); rn rn catch(SQLException e)rn out.println("查询所有用户失败");rn rn %>rnrnrnrn-------------------------------------------------------------------------以上是源码--------------------------------------------------------------------------------rn-------------------------------------------------------------------------下面是错误-------------------------------------------------------------------------------rnHTTP Status 500 - An exception occurred processing JSP page /ResultSetDemo.jsp at line 31rnrntype Exception reportrnrnmessage An exception occurred processing JSP page /ResultSetDemo.jsp at line 31rnrndescription The server encountered an internal error that prevented it from fulfilling this request.rnrnexceptionrnrnorg.apache.jasper.JasperException: An exception occurred processing JSP page /ResultSetDemo.jsp at line 31rnrn28: out.println("链接数据库失败");rn29: rn30: tryrn31: Statement stmt = conn.createStatement();rn32: String queryAll="select * from user;";rn33: ResultSet rs = stmt.executeQuery(queryAll);rn34: while(rs.next())rnrnrnStacktrace:rn org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)rn org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)rn org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:403)rn org.apache.jasper.servlet.JspServlet.service(JspServlet.java:347)rn javax.servlet.http.HttpServlet.service(HttpServlet.java:725)rn org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)rnrnroot causernrnjava.lang.NullPointerExceptionrn org.apache.jsp.ResultSetDemo_jsp._jspService(ResultSetDemo_jsp.java:98)rn org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)rn javax.servlet.http.HttpServlet.service(HttpServlet.java:725)rn org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)rn org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:403)rn org.apache.jasper.servlet.JspServlet.service(JspServlet.java:347)rn javax.servlet.http.HttpServlet.service(HttpServlet.java:725)rn org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)rnrnnote The full stack trace of the root cause is available in the Apache Tomcat/8.0.5 logs.rnrnrn这是咋回事啊?
http:500错误,请指教!
asp+access编写的网页,在2000server中一切正常,可转到2003server中,论坛出现http:500错误,后台文件夹下密码检测页面也出现此错误,纳闷!是系统哪里设置不对?
HTTP 500错误~求教啊
Exception reportrnrnmessage rnrndescription The server encountered an internal error () that prevented it from fulfilling this request.rnrnexception rnrnorg.apache.jasper.JasperException: /bugm/chklogin.jsp(4,0) The value for the useBean class attribute bugdb.dbconn is invalid.rn org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512)rn org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)rn org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)rn org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)rn javax.servlet.http.HttpServlet.service(HttpServlet.java:802)rnrnrnroot cause rnrnorg.apache.jasper.JasperException: /bugm/chklogin.jsp(4,0) The value for the useBean class attribute bugdb.dbconn is invalid.rn org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)rn org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:405)rn org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:146)rn org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1174)rn org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1116)rn org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)rn org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)rn org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)rn org.apache.jasper.compiler.Node$Root.accept(Node.java:456)rn org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)rn org.apache.jasper.compiler.Generator.generate(Generator.java:3320)rn org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)rn org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)rn org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)rn org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)rn org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)rn org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)rn org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)rn org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)rn javax.servlet.http.HttpServlet.service(HttpServlet.java:802)rnrnrnnote The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.rnrn
tomcat http status 500错误
type Exception reportrnrnmessage rnrndescription The server encountered an internal error () that prevented it from fulfilling this request.rnrnexception rnrnjava.lang.NullPointerExceptionrn java.lang.String.indexOf(Unknown Source)rn java.lang.String.indexOf(Unknown Source)rn org.apache.struts.taglib.logic.MatchTag.condition(MatchTag.java:158)rn org.apache.struts.taglib.logic.MatchTag.condition(MatchTag.java:100)rn org.apache.struts.taglib.logic.ConditionalTagBase.doStartTag(ConditionalTagBase.java:174)rn admin.host.hosts_jsp._jspService(hosts_jsp.java:178)rn org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)rn javax.servlet.http.HttpServlet.service(HttpServlet.java:803)rn org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)rn org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)rn org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)rn org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)rn org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)rn javax.servlet.http.HttpServlet.service(HttpServlet.java:690)rn javax.servlet.http.HttpServlet.service(HttpServlet.java:803)rn org.apache.webapp.admin.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:123)rnrnrnnote The full stack trace of the root cause is available in the Apache Tomcat/5.5.26 logs.rnrn快帮我看看啊,头疼到现在了
http 500错误是什么原因?
为什么老是出现 http 500这样的错误?
Http Status 500错误
[color=#FF0000]org.apache.jasper.JasperException: Unable to compile class for JSP: rnrnAn error occurred at line: 32 in the generated java filernThe method getJspApplicationContext(ServletContext) is undefined for the type JspFactoryrnrnStacktrace:rn org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:102)rn org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:331)rn org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:469)rn org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)rn org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)rn org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)rn org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)rn org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)rn org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)rn org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)rn javax.servlet.http.HttpServlet.service(HttpServlet.java:722)[/color]rnrnlz在百度/google找了好久,个个都说[color=#FFFF00]解决办法就是把有像jsp-api.jar servlet-api.jar跟tomcat6的lib中同样的包都给去掉,重新部署,重新启动就可以了。[/color]rnrn谁不会这么说咯。。。。rn问题是,到底哪里的jsp-api.jar?到底哪里的servlet-api.jar???rn我在我的电脑里搜了一下servlet-api.jar...rn有两个途径分别是rnD:\eclipse\helios\eclipse\plugins\apache-tomcat-7.0.27\librn和rnD:\j2ee安装工具\apache-tomcat-7.0.27\librn木有了。请问论坛的各位大神,到底要去掉哪个啊?rnrn
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http status 500错误
我想用Spring mvc搭个网站框架用到beans、contenxt、Web、webmvc四个jar包启动服务器后首页显示正常。在输入id号提交表单后出现了500错误,请大侠援手……
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如题。。。我在XP上装的是IIS5.1版本的,装完之后,也配好网站了,可是打开ASP的时候出现了内部服务器错误。rnrn于是又按网上说的把三个地方的密码改成一致的。可是还是打不开rnrn另外请问IIS 在任务管理器中进程里的映像名称是什么呀。 我怀疑IIS没起来怎么回事??rnrn或者是哪们另有高见。。。请不吝赐教。
HTTP 500错误怎么解决?
windows xp系统,多谢~
。net 中http 500错误
今天打开IIS默认网站时出现了一个无法打开端口的错误,于是改了端口又不能运行,后来我干脆重装了IIS(卸载后用完美卸载清理了注册表,并重启计算机)rn但接下来又出现了如下问题,在打开。net项目时弹出如下警告:rnrn尝试创建或打开位于URL:http://localhost/xxx的Web项目时,Web服务器报告了一下错误:"Http/1.0 500 Server Error"rnrn不知道是怎么搞的,想请高手指教rn谢谢
有关HTTP 500错误
请问服务器提示HTTP 500错误是什么原因?急!谢谢。
求助:HTTP Status 500错误
rnHTTP Status 500 -rnrntype Exception reportrnrnmessage rnrndescription The server encountered an internal error () that prevented it from fulfilling this request.rnrnexception rnrnjavax.servlet.ServletException: Servlet.init() for servlet action threw exceptionrn org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)rn org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)rn org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)rn org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)rn org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)rn org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)rn org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)rn org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)rn java.lang.Thread.run(Thread.java:595)rnrnrnroot cause rnrnjava.lang.NullPointerExceptionrn org.apache.struts.action.ActionServlet.parseModuleConfigFile(ActionServlet.java:1003)rn org.apache.struts.action.ActionServlet.initModuleConfig(ActionServlet.java:955)rn org.apache.struts.action.ActionServlet.init(ActionServlet.java:482)rn javax.servlet.GenericServlet.init(GenericServlet.java:211)rn org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)rn org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)rn org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)rn org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)rn org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)rn org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)rn org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)rn org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)rn java.lang.Thread.run(Thread.java:595)rnrn
http 500错误的处理方法
转自:http://baike.baidu.com/view/965448.htm 转自:http://hi.baidu.com/happyzhyq1984/blog/item/c0fd99a9df5c94f51f17a259.html   步骤: 1. 先从IE里读出具体错误信息(IE里设置一下); 2. 然后详细找原因;(找到错误根源后,按以下横线结束处的步骤即可解决)   Mi...
http500错误解决不了!!
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http500错误求救!!!!
出现奇怪问题,就是普通网页,用localhost可以浏览本地网页,用127.0.0.1就出现500错误,错误代码如下:Server ErrorrnThe following error occurred:rn[code=CANT_CONNECT_LOOPBACK] Cannot connect due to potential loopback problems rn哪位高人能帮忙解决啊!
关于HTTP500错误
利用ASP+Acess做了一个网站rn本地测试没有问题rn不过上传之后就出现了Http500错误rn不能显示页面rn不知道是什么缘故..rn上网查询知道是IWAM账号出的问题rn不过按照解决的步骤却没办法找到"active directory用户和计算机"这个东西rn现在是异常苦恼中rnrn我链接数据库用的"数据源名称"而非自定义位置,会不会是这里的问题呢?
求助http status 500错误.
各位大虾,小弟求助一个jsp网站部署的问题.rnrn操作系统: windows 2000 family serverrn数据库:sql server 2000 enterprise sp3rnjdk: 1.4.2_06rntomcat: 4.1rnsql server jdbc driver也安装了, 测试时出现错误提示:rnrnHTTP Status 500 - rnrn--------------------------------------------------------------------------------rnrntype Exception reportrnrnmessage rnrndescription The server encountered an internal error () that prevented it from fulfilling this request.rnrnexception rnrnorg.apache.jasper.JasperException: /Config.jsp(0,0) Page directive: can't have multiple occurrences of contentTypern at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:94)rn at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:428)rn at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:140)rn at org.apache.jasper.compiler.Validator$PageDirectiveVisitor.visit(Validator.java:161)rn at org.apache.jasper.compiler.Node$PageDirective.accept(Node.java:280)rn at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:1028)rn at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:1070)rn at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:1076)rn at org.apache.jasper.compiler.Node$Root.accept(Node.java:232)rn at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:1028)rn at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:1070)rn at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:1090)rn at org.apache.jasper.compiler.Node$IncludeDirective.accept(Node.java:319)rn at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:1028)rn at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:1070)rn at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:1076)rn at org.apache.jasper.compiler.Node$Root.accept(Node.java:232)rn at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:1028)rn at org.apache.jasper.compiler.Validator.validate(Validator.java:581)rn at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:230)rn at org.apache.jasper.compiler.Compiler.compile(Compiler.java:369)rn at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:473)rn at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:190)rn at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)rn at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)rn at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)rn at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)rn at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)rn at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)rn at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)rn at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)rn at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)rn at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)rn at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)rn at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)rn at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)rn at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)rn at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)rn at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)rn at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)rn at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)rn at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)rn at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)rn at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)rn at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)rn at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)rn at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)rn at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)rn at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)rn at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)rn at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)rn at java.lang.Thread.run(Thread.java:534)rnrnrnrn--------------------------------------------------------------------------------rnrnApache Tomcat/4.1.24rnrnrn请问怎么解决?? rnrnrn
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