jetty+httpClient使用

背景：

看了https://www.cnblogs.com/donlianli/p/10954716.html这篇文章之后，突然发现自己的知识面太窄了，连这些几乎可以说基础的工具都没怎么用过，于是决定了解一下。

embed jetty使用

1、引入依赖

<dependency>
	<groupId>javax.servlet</groupId>
	<artifactId>javax.servlet-api</artifactId>
	<version>3.1.0</version>
	<scope>provided</scope>
</dependency>
<dependency>
	<groupId>org.eclipse.jetty.aggregate</groupId>
	<artifactId>jetty-all</artifactId>
	<version>7.6.9.v20130131</version>
</dependency>
<!--方便打印-->
<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>fastjson</artifactId>
	<version>1.2.31</version>
</dependency>

搜索了一下embed jetty相关的文章，没有发现太多，于是就引入了上面几个jar包。

2、代码

package me.lovegao.learn.jetty;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.AbstractHandler;

import com.alibaba.fastjson.JSONObject;

public class JettyServerMain {

	public static void main(String[] args) throws Exception {
		Server server = new Server(8888);
		server.setHandler(new HelloHandler());
		server.start();
		server.join();
	}

}

class HelloHandler extends AbstractHandler {

	@Override
	public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response)
			throws IOException, ServletException {
		System.out.println("target:" + target 
				+ ",request:" + JSONObject.toJSONString(request.getParameterMap()));
		long threadId = Thread.currentThread().getId();
		response.setStatus(HttpServletResponse.SC_OK);
		PrintWriter out = response.getWriter();

		out.println("hello+" + threadId);

		baseRequest.setHandled(true);
	}

}

　　

3、执行

在浏览器请求：http://localhost:8888/hello/world?q1=1&q2=2

控制台打印如下：

target:/hello/world,request:{"q1":["1"],"q2":["2"]}

　　

HttpClient使用

1、引入依赖

<dependency>
  <groupId>org.apache.httpcomponents</groupId>
  <artifactId>httpclient</artifactId>
  <version>4.5.8</version>
</dependency>

来源：http://hc.apache.org/httpcomponents-client-4.5.x/httpclient/dependency-info.html

2、参考官网代码

public static void request1() throws Exception {
	CloseableHttpClient httpclient = HttpClients.createDefault();
	HttpGet httpGet = new HttpGet("http://localhost:8888/homepage?q1=v1");
	CloseableHttpResponse response1 = httpclient.execute(httpGet);
	try {
	    System.out.println(response1.getStatusLine());
	    HttpEntity entity1 = response1.getEntity();
	    byte[] res = entity1.getContent().readAllBytes();
	    String str = new String(res);
	    System.out.println("str:" + str);
	    // do something useful with the response body
	    // and ensure it is fully consumed
	    EntityUtils.consume(entity1);
	} finally {
	    response1.close();
	}
	httpclient.close();
}

3、执行

控制台打印结果：

HTTP/1.1 200 OK
str:hello+15

　　

 4、HttpPost请求

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class HttpPost {

    public static void main(String[] args) throws ClientProtocolException, IOException {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost("http://ip:port/fe");
        List <NameValuePair> nvps = new ArrayList <NameValuePair>();
        nvps.add(new BasicNameValuePair("name", "str"));
        nvps.add(new BasicNameValuePair("feature", "address"));
        httpPost.setEntity(new UrlEncodedFormEntity(nvps));
        CloseableHttpResponse response1 = httpclient.execute(httpPost);
        try {
            System.out.println(response1.getStatusLine());
            HttpEntity entity1 = response1.getEntity();
            byte[] res = new byte[1024];
            InputStream is = entity1.getContent();
            int len = 0;
            while((len = is.read(res)) > 0) {
                String str = new String(res, 0, len);
                System.out.print(str);
            }
            EntityUtils.consume(entity1);
        } finally {
            response1.close();
        }
        httpclient.close();
    }

}