Java 运行 servlet 显示错误
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Running servlet shows error
提问by Shubham Agarwal Bhewanewala
I wrote following codes in the java file in eclipse seeing a tutorial. When I try to run this on the server it shows me
我在 eclipse 的 java 文件中写了以下代码，看教程。当我尝试在服务器上运行它时，它显示了我
Http: 404 error
Type Status Report
Description The origin server did not find a current representation for the target resource or is not willing to disclose that one exists
My code is
我的代码是
package com.shaby.newservletdemo;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class servletInterface implements Servlet{
ServletConfig servletConfig= null;
@Override
public void destroy() {
// TODO Auto-generated method stub
System.out.println("Servlet Destroyed.");
}
@Override
public ServletConfig getServletConfig() {
// TODO Auto-generated method stub
return servletConfig;
}
@Override
public String getServletInfo() {
// TODO Auto-generated method stub
return "Version 1. 2016-2019";
}
@Override
public void init(ServletConfig arg0) throws ServletException {
// TODO Auto-generated method stub
this.servletConfig= arg0;
System.out.println("Servlet Initialized");
}
@Override
public void service(ServletRequest arg0, ServletResponse arg1) throws ServletException, IOException {
// TODO Auto-generated method stub
arg1.setContentType("text/html");
PrintWriter pw= arg1.getWriter();
pw.println("<html><body>");
pw.println("Hello Service has been done!!");
pw.println("</body></html>");
}
}
Is there any problem in the execution part or Am i missing something?? I am running this on Eclipse IDE. I am using Tomcat 9 server.
执行部分有什么问题还是我遗漏了什么？？我在 Eclipse IDE 上运行它。我正在使用 Tomcat 9 服务器。
web.xml
网页.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>servletsdemo</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>servletInterface</servlet-name>
<servlet-class>servletInterface</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>servletInterface</servlet-name>
<url-pattern>/servletInterface</url-pattern>
</servlet-mapping>
</web-app>
采纳答案by Jure Kolenko
Do you have your web.xml configured?
你的 web.xml 配置了吗？
Should have something like
应该有类似的东西
<servlet-mapping>
<servlet-name>servletInterface</servlet-name>
<url-pattern>/servletInterface</url-pattern>
</servlet-mapping>
in it.
在里面。
Also, you should probably extend HttpServlet instead of Servlet.
此外，您可能应该扩展 HttpServlet 而不是 Servlet。
回答by OTM
404 status code means the server is not able to find the requested resource. Please check if you have mapped the request uri to the servlet and included the servlet and classname in web.xml correctly.
404 状态码表示服务器无法找到请求的资源。请检查您是否已将请求 uri 映射到 servlet 并在 web.xml 中正确包含了 servlet 和类名。
回答by Hùng Ng Vi
I think you should implement abstract class javax.servlet.http.HttpServlet.
我认为你应该实现抽象类javax.servlet.http.HttpServlet。
And specific package of the class(if need):
以及类的特定包（如果需要）：
<servlet-class>path.to.package.ServletInterface</servlet-class>
<servlet-class>path.to.package.ServletInterface</servlet-class>
See the example: Servlet Tutorials
请参阅示例：Servlet 教程
