我想在eclipse中執行一個servlet程序,但我得到一個HTTP狀態500錯誤。HTTP狀態500 - 錯誤實例化servlet類java.reg.pkg.Hello
請找我的目錄結構:
Practice_servlet | Java Resources | src | javs.reg.pkg | Hello.java
我的web.xml文件是:
<?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" id="WebApp_ID" version="2.5">
<display-name>Practice1_servlet</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>Hello1</servlet-name>
<servlet-class>java.reg.pkg.Hello</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Hello1</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>
</web-app>
我hello.java程序是:
package java.reg.pkg;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class Hello
*/
public class Hello extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public Hello() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("type/html");
PrintWriter out = response.getWriter();
out.println("Hello World");
// TODO Auto-generated method stub
}
}
的問題可能是什麼你知道嗎?用於上述程序
堆棧跟蹤:
HTTP狀態500 - 錯誤實例servlet類java.reg.pkg.Hello
類型異常報告
消息錯誤實例servlet類的java .reg.pkg.Hello
說明服務器遇到內部錯誤,導致無法完成此請求。
例外
javax.servlet.ServletException:錯誤實例化servlet類 java.reg.pkg.Hello org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) 組織.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter .java:408) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040) org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process(AbstractProtocol.java:607) org.apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run(JIoEndpoint.java:313) java.util.concurrent.ThreadPoolExecutor .runWorker(來源不明) java.util.concurrent.ThreadPoolExecutor中的$ Worker.run(來源不明) java.lang.Thread.run(來源不明)
根源
拋出java.lang.ClassNotFoundException: java.reg.pkg.Hello org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1718) org.apache.catalina.loader.Weba ppClassLoader.loadClass(WebappClassLoader.java:1569) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) 組織.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter。java:408) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040) org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process(AbstractProtocol.java:607) org.apache.tomcat.util .net.JIoEndpoint $ SocketProcessor.run(JIoEndpoint.java:313) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor $ Worker.run(Unknown Source) java.lang。 Thread.run(Unknown Source)
note注意Apache Tomcat/7.0.52日誌中提供了根本原因的完整堆棧跟蹤。
我使用的Apache Tomcat/7.0.52。
發佈堆棧跟蹤。 –
編輯部分中的堆棧跟蹤 – user3090870
如果我在Eclipse中複製並粘貼代碼,我得不到500 ... – Diferdin