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;
- }
- }
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);