servlet的xml配置
2019-01-09 本文已影响0人
yinhaijun
构建过程
项目结构如图
image.png
pom.xml依赖，导入servlet包
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.haijunyin</groupId>
<artifactId>servletdemo-xmlconfig</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
</dependencies>
</project>
HelloServlet.java继承HttpServlet
package com.haijunyin.servletdemo.xmlconfig.servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class HelloServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("HelloServlet...doGet...");
resp.getWriter().write("hello...");
}
}
web.xml配置映射
<?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_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>web02</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>
<!-- 声明Servlet对象 -->
<servlet-name>HelloServlet</servlet-name>
<!-- 上面一句指定Servlet对象的名称 -->
<servlet-class>com.haijunyin.servletdemo.xmlconfig.servlet.HelloServlet</servlet-class>
<!-- 上面一句指定Servlet对象的完整位置，包含包名和类名 -->
</servlet>
<servlet-mapping>
<!-- 映射Servlet -->
<servlet-name>HelloServlet</servlet-name>
<!--<servlet-name>与上面<Servlet>标签的<servlet-name>元素相对应，不可以随便起名 -->
<url-pattern>/hello</url-pattern>
<!-- 上面一句话用于映射访问URL -->
</servlet-mapping>
</web-app>
index.jsp请求页
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head></head>
<body>
<a href="/hello">hello</a>
</body>
</html>
运行结果
把应用加入tomcat启动
image.png
