tomcat能够正常访问但是但是写完代码访问网页就500,求大神帮忙急死了

Passer_Ma 2017-01-09 11:25:55

下面是代码,我把被人的相同的项目导进去可以正常读取网页,自己复制粘贴过来就不行了,包导了类名检查无误可是就是报500
package web;

import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class TimeServlet extends HttpServlet {
protected void service(HttpServletRequest req,
HttpServletResponse res) throws ServletException,
IOException {
Date date = new Date();
SimpleDateFormat sdf =
new SimpleDateFormat("HH:mm:ss");
String now = sdf.format(date);
res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println("<p>"+now+"</p>");
out.close();

}

}

web.xml代码

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<display-name>servlet1</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>

<servlet>
<servlet-name>time</servlet-name>
<servlet-class>web.TimeServlet</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>time</servlet-name>
<url-pattern>/ts</url-pattern>
</servlet-mapping>
</web-app>

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ryuugu_rena 2017-01-11

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ClassNotFoundException: web.TimeServlet 这个类找不到你重新编译下试试，不行就看看配置文件是不是名字写错了

nikyotensai 2017-01-11

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自由自在_Yu 2017-01-11

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引用 4 楼 qq_36735956 的回复:

[quote=引用 2 楼 yuxiangaaaaa 的回复:] console日志

HTTP Status 500 - Error instantiating servlet class web.TimeServlet type Exception report message Error instantiating servlet class web.TimeServlet description The server encountered an internal error that prevented it from fulfilling this request. exception javax.servlet.ServletException: Error instantiating servlet class web.TimeServlet org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:958) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637) org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517) org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745) root cause java.lang.ClassNotFoundException: web.TimeServlet org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1892) org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1735) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:958) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637) org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517) org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745) note The full stack trace of the root cause is available in the Apache Tomcat/7.0.73 logs. Apache Tomcat/7.0.73谢谢了.[/quote] 把tomcat下编译文件删掉，webapps和work/catalina/localhost文件夹里面的servlet1文件夹，重新编译一下，应该是编译出错了。

bcsflilong 2017-01-11

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java.lang.ClassNotFoundException: web.TimeServlet 我看你的目录结构你讲 web.TimeServlet 直接移到src目录下再试试

尼古拉斯-全蛋 2017-01-11

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java.lang.ClassNotFoundException: web.TimeServlet 检查一下有没有这个类，有没有正常编译，没有的话clean一下项目重新编译一下

Passer_Ma 2017-01-10

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引用 2 楼 yuxiangaaaaa 的回复:

console日志

Passer_Ma 2017-01-10

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引用 1 楼 qnmdcsdn 的回复:

贴后台错误日志

HTTP Status 500 - Error instantiating servlet class web.TimeServlet

type Exception report

message Error instantiating servlet class web.TimeServlet

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Error instantiating servlet class web.TimeServlet
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:958)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517)
org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)
root cause

java.lang.ClassNotFoundException: web.TimeServlet
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1892)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1735)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:958)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517)
org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.73 logs.

Apache Tomcat/7.0.73

这个帮帮看看谢谢了

自由自在_Yu 2017-01-10