如何创建servlet？(初学者必看，手动创建自动创建两种方式)

港控/mmm° 2023-10-05 09:49 24阅读 0赞

### 如何创建servlet？ ###

**方式一、手动创建步骤**：  
创建好一个web项目，包下创建一个class文件。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 1]  
创建完成后看到如下所示，但是此时我们这个类并不具备servle功能  
![在这里插入图片描述][20200909113346477.png_pic_center]  
所以需要继承HttpServlet类，获得servlet的功能  
![在这里插入图片描述][2020090911372089.png_pic_center]  
继承后重写方法，右键空白处  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 2]  
选择doGet，doPost，点击OK  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 3]  
那么我们的servlet类已经建好了  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 4]  
简单修改一下，删掉不需要的东西，方便以后使用（但是servlet并没有完全创建好，还需要在web.xml配置servlet信息）。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 5]  
打开web.xml,配置web.xml  
![在这里插入图片描述][2020090913314734.png_pic_center]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 6]

<?xml version="1.0" encoding="UTF-8"?>
    <web-app version="2.5" 
    	xmlns="http://java.sun.com/xml/ns/javaee" 
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
      <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
      </welcome-file-list>
      
      
      
      
      <servlet>
      	<servlet-name>MyServlet</servlet-name>  
      	<servlet-class>myservlet.MyServlet</servlet-class>  
      </servlet>
      
      
      <servlet-mapping>
      	<servlet-name>MyServlet</servlet-name> 
      	<url-pattern>/MyServlet</url-pattern> 
      </servlet-mapping>
    </web-app>

**测试超链接，index.jsp 访问进入servlet**：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 7]  
servlet类中在控制台打印信息。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 8]

![在这里插入图片描述][20200909134606316.png_pic_center]  
![在这里插入图片描述][20200909134644472.png_pic_center]  
控制台信息：  
![在这里插入图片描述][20200909134706821.png_pic_center]

**方式二、自动创建Servlet**  
右键new一个Servlet  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 9]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 10]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 11]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 12]  
servlet类已经创建好  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 13]  
删掉不需要的东西  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 14]  
我们再打开web.xml，发现已经自动给我们配置好了。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1poYVpoYV9fSHVp_size_16_color_FFFFFF_t_70_pic_center 15]  
两种方式都可以创建servlet，初学者手动创建可以加深理解，加深印象，当然自动配置效率高些，可节省时间，你学会了吗？

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