IDEA 2021配置JavaWeb项目

╰半橙微兮° 2022-09-01 10:56 192阅读 0赞

IDEA 2021版本 新建JSP项目

本人在学习JavaWeb的过程中，发现网上创建JavaWeb的教程都相对过老，因此经过搜索以及使用，IDEA2021版本新建JavaWeb项目的流程如下。

1.新建一个干净的Java项目

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2.右键项目，然后点击Add Framework Support…

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3.添加Web Application 勾选Create web.xml

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4.添加Maven

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5.项目初始化，只需要设置groupId就不会报错

<groupId>com.hmlhao</groupId>
        <artifactId>ServletTest</artifactId>
        <version>1.0-SNAPSHOT</version>

6.修改完成之后会出现Maven自动更新的图标点击一下就可以了，新版本的IDEA不支持Maven自动更新，因此我们要手动点击。

![请添加图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzQ2MjY1MjU0_size_16_color_FFFFFF_t_70 4]

7.在pom.xml配置环境依赖,完成之后点击按钮，就可以导入了

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<dependencies>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>javax.servlet-api</artifactId>
                <version>4.0.1</version>
            </dependency>
            <dependency>
                <groupId>javax.servlet.jsp</groupId>
                <artifactId>javax.servlet.jsp-api</artifactId>
                <version>2.3.3</version>
            </dependency>
        </dependencies>

8.在src／main／java目录下新建一个包，并且新建一个HelloServlet,java文件

package com.hmlhao.servlet;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    import java.io.PrintWriter;
    
    public class HelloServlet extends HttpServlet { 
        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { 
            PrintWriter writer = resp.getWriter();
            writer.print("Hello,Servlet");
        }
    
        @Override
        protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { 
            doGet(req, resp);
        }
    }

9.web/WEB-INF/web.xml书写Servlet映射

<?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.hmlhao.servlet.HelloServlet</servlet-class>
        </servlet>
        <servlet-mapping>
            <servlet-name>hello</servlet-name>
            <url-pattern>/hello</url-pattern>
        </servlet-mapping>
    </web-app>

10.点击Add Configuration…然后点击加号添加Tomcat服务器

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初始时configure确定服务器本地安装目录即可，其他默认即可

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部署web项目

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向下拉有设置访问路径

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11.点击运行就可以

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12.成功运行

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