hello_servlet
环境：java 1.8
0.创建web项目
mvn archetype:generate \-DgroupId=com.yawei \-DartifactId=hello_servlet \-Dversion=1.0-SNAPSHOT \-DarchetypeGroupId=org.apache.maven.archetypes \-DarchetypeArtifactId=maven-archetype-quickstart \-DarchetypeVersion=1.4 \-DinteractiveMode=false1.添加依赖 pom.xml
<?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><packaging>pom</packaging><groupId>com.yawei</groupId><artifactId>tmp</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.13.2</version><scope>test</scope></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.3.25</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jsp-api</artifactId><version>2.0</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency></dependencies>
</project>
2.HelleServlet
package com.yawei.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 HelleServlet extends HttpServlet {protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {String method = req.getParameter("method");if (method.equals("add")) {req.getSession().setAttribute("msg", "执行了add的方法");}if (method.equals("delete")) {req.getSession().setAttribute("msg", "执行了delete的方法");}req.getRequestDispatcher("/WEB-INF/jsp/text.jsp").forward(req, resp);}protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {doGet(req, resp);}
}
3.text.jsp
<%--Created by IntelliJ IDEA.User: zhangyaweiDate: 2025/9/14Time: 21:11To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>Title</title>
</head>
<body>${msg}</body>
</html>
4.web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"version="4.0"><servlet><servlet-name>hello</servlet-name><servlet-class>com.yawei.servlet.HelleServlet</servlet-class></servlet><servlet-mapping><servlet-name>hello</servlet-name><url-pattern>/hello</url-pattern></servlet-mapping><session-config><session-timeout>15</session-timeout></session-config><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>
- from.jsp
<%--Created by IntelliJ IDEA.User: zhangyaweiDate: 2025/9/14Time: 21:17To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>Title</title>
</head>
<body><form action="/hello" method="post"><input type="text" name="method"><input type="submit">
</form>
</body>
</html>
- index.jsp
<%--Created by IntelliJ IDEA.User: zhangyaweiDate: 2025/9/14Time: 16:13To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html><head><title>$Title$</title></head><body>$END$</body>
</html>
7.目录
8.测试：
http://localhost:8080/tmp_war_exploded/hello?method=add