1 import io.undertow.Undertow;
 2 import io.undertow.server.HttpHandler;
 3 import io.undertow.server.HttpServerExchange;
 4 import io.undertow.util.Headers;
 5 
 6 public class HelloWorldServer {
 7    public static void main(String[] args) {
 8        Undertow server=Undertow.builder()
 9        .addHttpListener(8080, "localhost").setHandler(new HttpHandler(){//设置HttpHandler的回调方法
10             @Override
11             public void handleRequest(HttpServerExchange exchange)
12                     throws Exception {        
13                 exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/plain");
14                 exchange.getResponseSender().send("This is my first insert server!");
15             }
16         }).build();
17        server.start();
18    }
19 }

   运行后打开浏览器输入 http://localhost:8080 ，则页面输出“Hello World”字符串

 1 import io.undertow.Handlers;
 2 import io.undertow.Undertow;
 3 import io.undertow.server.HttpHandler;
 4 import io.undertow.server.handlers.PathHandler;
 5 import io.undertow.servlet.Servlets;
 6 import io.undertow.servlet.api.DeploymentInfo;
 7 import io.undertow.servlet.api.DeploymentManager;
 8 import io.undertow.servlet.api.ServletContainer;
 9 import io.undertow.servlet.api.ServletInfo;
10 
11 import javax.servlet.ServletException;
12 
13 import org.wildfly.undertow.quickstart.servlet.MyServlet;
14 
15 public class ServletServer {
16     
17        public static void main(String[] args) {
18     
19         /*
20          * 创建ServletInfo，Servelt的最小单位。是对javax.servlet.Servlet具体实现的再次封装。
21          * 注意：ServletInfo的name必须是唯一的
22          */
23         ServletInfo servletInfo1 = Servlets.servlet("MyServlet",
24                 MyServlet.class);
25         // 创建servletInfo的初始化参数
26         servletInfo1.addInitParam("message", "This is my first MyServlet!");
27         // 绑定映射为/myServlet
28         servletInfo1.addMapping("/myServlet");
29         /**
30          * 创建包部署对象，包含多个servletInfo。可以认为是servletInfo的集合
31          */
32         DeploymentInfo deploymentInfo1 = Servlets.deployment();
33         // 指定ClassLoader
34         deploymentInfo1.setClassLoader(ServletServer.class.getClassLoader());
35         // 应用上下文(必须与映射路径一致，否则sessionId会出现问题，每次都会新建)
36         deploymentInfo1.setContextPath("/myapp");
37         // 设置部署包名
38         deploymentInfo1.setDeploymentName("myServlet.war");
39         // 添加servletInfo到部署对象中
40         deploymentInfo1.addServlets(servletInfo1);
41         /**
42          * 使用默认的servlet容器，并将部署添加至容器
43          * 容器，用来管理DeploymentInfo，一个容器可以添加多个DeploymentInfo
44          */
45         ServletContainer container = Servlets.defaultContainer();
46         /**
47          * 将部署添加至容器并生成对应的容器管理对象
48          * 包部署管理。是对添加到ServletContaint中DeploymentInfo的一个引用，用于运行发布和启动容器
49          */
50         DeploymentManager manager = container.addDeployment(deploymentInfo1);
51         // 实施部署
52         manager.deploy();
53         /**
54          * 分发器：将用户请求分发给对应的HttpHandler
55          */
56         PathHandler pathHandler = Handlers.path();
57         /**
58          * servlet path处理器，DeploymentManager启动后返回的Servlet处理器。
59          */
60         HttpHandler myApp=null;
61         try {
62             //启动容器，生成请求处理器
63             myApp=manager.start();
64         } catch (ServletException e) {
65             throw new RuntimeException("容器启动失败！");
66         }
67         //绑定映射关系
68         pathHandler.addPrefixPath("/myapp", myApp);
69         
70         Undertow server=Undertow.builder().
71                 //绑定端口号和主机
72                 addHttpListener(8081, "localhost")
73                 //设置分发处理器
74                 .setHandler(pathHandler).build();
75         //启动server
76         server.start();
77     }
78 }

 1 import java.io.IOException;
 2 import java.io.PrintWriter;
 3 
 4 import javax.servlet.ServletException;
 5 import javax.servlet.http.HttpServlet;
 6 import javax.servlet.http.HttpServletRequest;
 7 import javax.servlet.http.HttpServletResponse;
 8 
 9 public class MyServlet extends HttpServlet {
10 
11     private static final long serialVersionUID = 2378494112650465478L;
12 
13     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
14         doPost(req, resp);
15     }
16 
17     protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
18         PrintWriter writer = resp.getWriter();
19         writer.write("<p style='color:red;text-align:center;'>"+this.getInitParameter("message")+"</p>");
20         writer.close();
21     }
22     
23 }