Myeclipse2017实例关于servlet的@WebServlet注解。

目录结构

Servlet

@WebServlet注解用于标注在一个继承了HttpServlet类之上，属于类级别的注解。
用法形如：
@WebServlet(“/DisplayHeader1”)

package tuzi.com;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/HelloForm")
public class HelloForm extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public HelloForm() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 设置响应内容类型
        response.setContentType("text/html;charset=UTF-8");

        PrintWriter out = response.getWriter();
        String title = "使用 GET 方法读取表单数据";
        // 处理中文
        String name =new String(request.getParameter("name").getBytes("ISO8859-1"),"UTF-8");
        String docType = " \n";
        out.println(docType +
            "\n" +
            "\n" +
            "\n" +
            "
" + title + "
\n" +
            "
\n" +
            "  
站点名："
            + name + "\n" +
            "  
网址："
            + request.getParameter("url") + "\n" +
            "
\n" +
            "");
    }

    // 处理 POST 方法请求的方法
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}

其中 /DisplayHeader1 表示访问该servlet的 url 映射（地址）（此处为相对路径，即
“项目名称/DisplayHeader1” ）。

Web.xml

<web-app>
  <servlet>
    <servlet-name>HelloFormservlet-name>//类名，和servlet-mappping中的url-mapping值要相同
    <servlet-class>tuzi.com.HelloFormservlet-class>//所在的包名
  servlet>
  <servlet-mapping>
    <servlet-name>HelloFormservlet-name>
    <url-pattern>/Servet/HelloFormurl-pattern>//在浏览器中输入的url
  servlet-mapping>
web-app>

结果