基于创建Web项目运行时出错的解决方法(必看篇)

1、目录结构

2、各文件内容

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

 
 
 
 
 

  
 
 

web.xml

 
  Servlet
  web.servlet.Servlet
 
 
  Servlet
  /Servlet
 

Servlet.java

package web.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet(name = "Servlet")
public class Servlet extends HttpServlet {
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  System.out.println("doPost()...");
 }
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  System.out.println("doGet()...");
 }
}

正常运行后运行后，Server控制台会出现输出“doPost()...”字符

3、当未配置web.xml时，出现的错误提示

解决方法：在web.xml中配置相关信息，或在Servlet.java注解中添加内容：

 @WebServlet(name = "Servlet",urlPatterns = "/Servlet") 

4、配置web.xml文件但未覆写doGet()和doPost()方法，或未覆写相对应的方法出现的错误提示

package web.servlet;

@WebServlet(name = "Servlet")
public class Servlet extends HttpServlet {
 
}

package web.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet(name = "Servlet")
public class Servlet extends HttpServlet {
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  System.out.println("doGet()...");
 }
}

以上这篇基于创建Web项目运行时出错的解决方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持脚本之家。