使用HttpClient发送Post Http请求

最近需要使用java对Rest接口进行调用，也就是直接使用java直接发送Post, Get, Put, Delete等请求。

印象中可以使用Apache Common下的HttpClient来做，结果HttpClient已经独立成了HttpComponent，编码方式也有所改变。

Google出来的很多文章多数是common-httpclient的方式，在新版本中不怎么适用。经过一番研究自己做了一下封装:

 

 

package cn.com.dayang.auth;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.apache.log4j.Logger;


public class HttpXmlClient {
	private static Logger log = Logger.getLogger(HttpXmlClient.class);
	
	public static String post(String url, Map<String, String> params) {
		DefaultHttpClient httpclient = new DefaultHttpClient();
		String body = null;
		
		log.info("create httppost:" + url);
		HttpPost post = postForm(url, params);
		
		body = invoke(httpclient, post);
		
		httpclient.getConnectionManager().shutdown();
		
		return body;
	}
	
	public static String get(String url) {
		DefaultHttpClient httpclient = new DefaultHttpClient();
		String body = null;
		
		log.info("create httppost:" + url);
		HttpGet get = new HttpGet(url);
		body = invoke(httpclient, get);
		
		httpclient.getConnectionManager().shutdown();
		
		return body;
	}
		
	
	private static String invoke(DefaultHttpClient httpclient,
			HttpUriRequest httpost) {
		
		HttpResponse response = sendRequest(httpclient, httpost);
		String body = paseResponse(response);
		
		return body;
	}

	private static String paseResponse(HttpResponse response) {
		log.info("get response from http server..");
		HttpEntity entity = response.getEntity();
		
		log.info("response status: " + response.getStatusLine());
		String charset = EntityUtils.getContentCharSet(entity);
		log.info(charset);
		
		String body = null;
		try {
			body = EntityUtils.toString(entity);
			log.info(body);
		} catch (ParseException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		return body;
	}

	private static HttpResponse sendRequest(DefaultHttpClient httpclient,
			HttpUriRequest httpost) {
		log.info("execute post...");
		HttpResponse response = null;
		
		try {
			response = httpclient.execute(httpost);
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return response;
	}

	private static HttpPost postForm(String url, Map<String, String> params){
		
		HttpPost httpost = new HttpPost(url);
		List<NameValuePair> nvps = new ArrayList <NameValuePair>();
		
		Set<String> keySet = params.keySet();
		for(String key : keySet) {
			nvps.add(new BasicNameValuePair(key, params.get(key)));
		}
		
		try {
			log.info("set utf-8 form entity to httppost");
			httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		
		return httpost;
	}
}

 

 

如何调用:

 

 

		Map<String, String> params = new HashMap<String, String>();
		params.put("name", name);
		params.put("password", password);
			
		String xml = HttpXmlClient.post(loginUrl, params);
		log.info(xml);

 

 

参考资料:

HttpComponents Client GA主页

官方提供的入门文档

官方提供的Examples(这个最直接)

 

 

Ruby发送请求的方式

还是喜欢Ruby的发http请求的方式，本来想在项目中集成Groovy, 时间关系直接用java实现了

 

require "net/http"
require "rexml/document"
require "iconv"

puts 'read test xml from file...'
file = File.open('task.xml')
doc = REXML::Document.new file

xml = doc.to_s #document to xml string
cov=Iconv.new('gbk', 'utf-8')#create encoder
encodedXml = cov.iconv(xml)#encoding zh_CN
puts encodedXml #display log

params= {}
params["msg"]=xml
#post http request
uri = URI.parse("http://localhost:8080/monitor/client/message")

1.upto 2 do	|i|	
	puts 'send time:' + i.to_s
	
	res = Net::HTTP.post_form(uri, params)
end