Servlet项目的建立hello world

桃扇骨 2021-12-17 02:13 202阅读 0赞

**Servlet项目的建立**

1.  安装Tomcat  
    [安装Tomcat][Tomcat]
2.  新建JAVA Web项目  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzE1NTg2Ng_size_16_color_FFFFFF_t_70]  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzE1NTg2Ng_size_16_color_FFFFFF_t_70 1]  
    新建包  
    ![在这里插入图片描述][20190706211151599.png]  
    新建Servlet类，点next  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzE1NTg2Ng_size_16_color_FFFFFF_t_70 2]  
    设置在url中访问的代称，点finsh  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzE1NTg2Ng_size_16_color_FFFFFF_t_70 3]  
    重写service方法

package com.wf.test;
    
    import java.io.IOException;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    public class MyServlet extends HttpServlet { 
    
    	@Override
    	protected void service(HttpServletRequest req, HttpServletResponse resp) 
    			throws ServletException, IOException { 
    		resp.setContentType("text/html;charset=utf-8");
    		String str = "<h2>第一个测试程序</h2>";
    		resp.getWriter().write(str);
    	}
    }

1.  配置xml文件

![在这里插入图片描述][2019070621172214.png]

<?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_2_5.xsd" id="WebApp_ID" version="2.5">
      <display-name>Servlet_Test</display-name>
      <servlet>
        <servlet-name>my</servlet-name>
        <servlet-class>com.wf.test.MyServlet</servlet-class>
      </servlet>
      <servlet-mapping>
        <servlet-name>my</servlet-name>
        <url-pattern>/my</url-pattern>
      </servlet-mapping>
    </web-app>

1.  运行第一个程序  
    启动Tomcat服务器  
    ![在这里插入图片描述][20190707091958838.png]  
    在浏览器地址栏中输入url  
    [http://localhost:8080/Servlet\_Test/my][http_localhost_8080_Servlet_Test_my]  
    ![运行结果][20190707092052758.png]

[Tomcat]: http://programmer.ischoolbar.com/index.php/article/article/id/10.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzE1NTg2Ng_size_16_color_FFFFFF_t_70]: /images/20211214/d422e23ac9664ec5ba7d25b488ab6e3b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzE1NTg2Ng_size_16_color_FFFFFF_t_70 1]: /images/20211214/53bf2e51b35d46aabf259df8da37e202.png
[20190706211151599.png]: /images/20211214/b6ddecd04d6546e99bb2962db18625d8.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzE1NTg2Ng_size_16_color_FFFFFF_t_70 2]: /images/20211214/e95c39faff2242999b8eba6f3314a84a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzE1NTg2Ng_size_16_color_FFFFFF_t_70 3]: /images/20211214/73f753edf2f44b9cbbcd0a0451e70ac9.png
[2019070621172214.png]: /images/20211214/e8e7bf9405f844cb8dd8d34c5bafb8a4.png
[20190707091958838.png]: /images/20211214/d2fb201c35f34eb6a5b52f93a62f2fc3.png
[http_localhost_8080_Servlet_Test_my]: http://localhost:8080/Servlet_Test/my
[20190707092052758.png]: /images/20211214/110d9e0d6b8044329b3405a7dab60c09.png