用 Gretty 编写一个简单的 HTTP 服务器【Java版】，grettyjava,Gretty 是一个简单

用 Gretty 编写一个简单的 HTTP 服务器【Java版】，grettyjava,Gretty 是一个简单

Gretty 是一个简单的 Web 框架，用于构建 Web 服务端和客户端，基于Netty开发，支持 NIO 风格的 HTTP 服务器，异步 HTTP客户端，支持WebSocket的服务器和客户端。

JavaSimpleHttpServer.java

/** Copyright 2009-2010 MBTE Sweden AB.** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at** http://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/import org.mbte.gretty.httpserver.*;import java.net.InetSocketAddress;import java.util.HashMap;import java.util.Map;public class JavaSimpleHttpServer {    public static void main(String[] args) {        GrettyServer server = new GrettyServer()            .localAddress(new InetSocketAddress("localhost", 8080))            .dir("web")            .defaultHandler(new GrettyHttpHandler() {                public void handle() {                    getResponse().redirect("/");                }            })            .handler("/", new GrettyRestDescription() {                public void run() {                    get(new GrettyHttpHandler() {                        public void handle() {                            Map binding = new HashMap();                            binding.put("title", "Hello, World!");                            binding.put("message", "Hello, Java World");                            getResponse().setHtml(template("web/templates/main.gpptl", binding));                        }                    });                }            })            .webContext("/myapp", new GrettyContext("myapp"));        server.start();        GrettyHttpResponse response;        response = server.doTest("/nosuchurl");        assert response.getStatus().getCode() == 301;        assert response.getHeader("Location").equals("/");        response = server.doTest("/");        assert response.getStatus().getCode() == 200;        String respBody = response.getContentText();        assert respBody.contains("<title>Hello, World!</title>");        assert respBody.contains("Hello, Dynamic World!(from template)<br>");        assert respBody.contains("<center>HEADER</center>");        assert respBody.contains("<center>FOOTER</center>");        server.stop();    }}