add SimpleHttpServer

hutool-http/src/test/java/cn/hutool/http/test/SimpleServerTest.java

@@ -0,0 +1,21 @@
+package cn.hutool.http.test;
+
+import cn.hutool.core.io.IoUtil;
+import cn.hutool.core.util.StrUtil;
+import cn.hutool.http.HttpStatus;
+import cn.hutool.http.server.SimpleServer;
+
+import java.io.OutputStream;
+
+public class SimpleServerTest {
+
+	public static void main(String[] args) {
+		final SimpleServer server = new SimpleServer(8888);
+		server.addHandler("/", httpExchange -> {
+			httpExchange.sendResponseHeaders(HttpStatus.HTTP_OK, 0);
+			final OutputStream out = httpExchange.getResponseBody();
+			out.write(StrUtil.bytes("Hello Hutool Server!"));
+			IoUtil.close(out);
+		}).start();
+	}
+}