创建第一个Servlet

Myth丶恋晨 2022-09-30 06:05 189阅读 0赞

1.eclipse中创建一个Dynamic Web Project

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2.新建一个class文件，

package test;
    
    import java.io.IOException;
    import java.io.PrintWriter;
    
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    /**
     * 测试servlet,继承HttpServlet
     * @author echo
     *
     */
    // 除了在XML中进行配置，还可以采用注解的方式进行配置
    @WebServlet("/t")
    public class TestServlet extends HttpServlet{
    
    	/**
    	 * 
    	 */
    	private static final long serialVersionUID = 1L;
    	
    	/**
    	 * 重写doGet()方法
    	 * @throws IOException 
    	 */
    	public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException {
    		response.setContentType("text/html;charset=gb2312");
    		PrintWriter out = response.getWriter();
    		out.println("hahahahahaha");
    	}
    	
    }

3.除了使用上述代码中的注解，还可以在XML中配置servlet

<?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_3_0.xsd" id="WebApp_ID" version="3.0">
      <display-name>JSPDemo</display-name>
      <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
      </welcome-file-list>
      
      <servlet>
      	<servlet-name>TestServlet</servlet-name>
      	
      	<servlet-class>test.TestServlet</servlet-class>
      </servlet>
      
      <servlet-mapping>
      	<servlet-name>TestServlet</servlet-name>
      	
      	<url-pattern>/my</url-pattern>
      </servlet-mapping>
    </web-app>

4.部署在服务器上，在浏览器中输入地址进行访问

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