使用 IntelliJ IDEA创建Servlet 项目

超、凢脫俗 2022-05-06 13:46 275阅读 0赞

# 使用 IntelliJ IDEA 创建 Servlet 项目 #

## 0x1、新建一个 Web Application 项目 ##

![20181014093437.png][]

## 0x2 设置项目名称：ServletPro ##

![20181014093605.png][]

## 0x3 新建一个servlet文件：HelloWorld ##

![20181014093752.png][]  
![20181014093915.png][]

## 0x4 添加依赖的 Tomcat 下的 Servlet 库 ##

![20181014094008.png][]  
![20181014094112.png][]  
选择Tomcat下的servlet-api包。  
![20181014094245.png][]

## 0x5 编写HelloWorld.java代码 ##

import java.io.IOException;
    import java.io.PrintWriter;
    import javax.servlet.*;
    import javax.servlet.http.*;
     
     
    public class HelloWorld extends HttpServlet {
     
        private String message;
     
        public void init() throws ServletException
        {
            // 初始化
            message = "Hello, First Servlet!";
        }
     
        protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
     
        }
     
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            // 设置:响应内容类型
            response.setContentType("text/html");
     
            // 输出文本
            PrintWriter out = response.getWriter();
            out.write("<h1> " + message + " </h1>");
        }
    }

## 0x6 编写web.xml配置文件 ##

<?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>HelloWorld</servlet-name>
            <servlet-class>HelloWorld</servlet-class>
        </servlet>
    
        <servlet-mapping>
            <servlet-name>HelloWorld</servlet-name>
            <url-pattern>/demo</url-pattern>
        </servlet-mapping>
    </web-app>

## 0x7 部署 Tomcat ，并调试运行 ##

详见[Mac IDEA开发JavaWeb][Mac IDEA_JavaWeb]一文中为项目配置Tomcat  
![20181014100503.png][]

## 0x8 调试运行 ##

![20181014101025.png][]

[20181014093437.png]: /images/20220506/66ae2ff3c247447fb48b2b09243ef09e.png
[20181014093605.png]: /images/20220506/4531cffc23da4eefbcc14db0bc2e4831.png
[20181014093752.png]: /images/20220506/3cef344d838b4a67a3751e67c5e9c5d9.png
[20181014093915.png]: /images/20220506/96fe65e24f924d6e97867f4275292e20.png
[20181014094008.png]: /images/20220506/995bd9b806e646829286c487e37caf77.png
[20181014094112.png]: /images/20220506/5574664d2e19433ebb9b60bff681f3c1.png
[20181014094245.png]: /images/20220506/dd2612bd3b194a6fa72445eab11a8aff.png
[Mac IDEA_JavaWeb]: https://blog.csdn.net/geekmubai/article/details/82975660
[20181014100503.png]: /images/20220506/dc6738e8af7d4716a5ae7c4ce8b2430b.png
[20181014101025.png]: /images/20220506/00badc5208ed4c92a42b27412bafe161.png