首先打开MyEclipse，并在菜单上选择File—New—Other，在弹出的对话框中选择Web Project，然后Next，随后在弹出的对话框中填写Project Name：firstWeb，到此已经建立好了一个JavaWeb项目，名为firstWeb。
然后需要在该项目下新建一个Servlet。方法如下，选择File—New—Other，在弹出额度对话框中找到Web下面的Servlet，单击Next，在弹出的对话框中输入package名称：com.test.secondWeb（也可以根据自己习惯改为别的名称），Servlet名称：HelloServlet，然后Finish。
到这里准备工作已经完成，下面是刺激的代码环节。
MyEclipse自动生成的HelloServlet.java只是完成了一局简单话的输出，这里我们需要自己进行修改源代码。
package com.test.secondWeb;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class HelloServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public HelloServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setCharacterEncoding("UTF-8");
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println("<meta http-equiv=\"content-type\"content=\"text/html;charset=UTF-8\">");
out.println("<HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
String requestURI=request.getRequestURI();
out.print("<form action='" + requestURI +"' method='post'>");
out.print("请输入您的名字:<input type='text' name='name' />");
out.println("<input type='submit' />");
out.println("</form>");
out.println("");
String name =request.getParameter("name");
if(name!=null&&name.trim().length()>0){
out.println("您好,<b>"+name+"</b>.欢迎来到Java Web世界.");
}
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doGet(request, response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
代码完成，想要看到项目运行效果还需要进行吧项目部署到Tomcat上，MyEclipse2017部署方法（如果其他版本略有不同请自行找度娘吧）：菜单上选择windows—show view—Servers，这是MyEclipse下方位置会弹出Servers框，在你自己安装的Tomcat上（）右键选择Add/Remove Deployments···，然后选择项目firstWeb，点击add，完成关闭对话框。
然后就是看看项目效果了，首先启Tomcat，方法是在刚才你自己安装的Tomcat上右键选择Strat，然后等待一会儿（这时代码框下面会有一些文字不断刷新，等到一切回归风平浪静就ok了，大概也就5、6秒钟，具体看电脑配置和项目大小吧）。
然后打开MyEclipse自带的浏览器，如图：
然后在地址框中输入：http://localhost:8080/firstWeb/servlet/HelloServlet 回车即可看到效果图
可以在文本框中输入你的名字，点击“提交查询内容”，最后效果如图：
