代码是网上找的，然后自己写了一遍，感觉挺快的，现在贴出来

1 package httpclient; 2  3 import java.io.File; 4 import java.io.FileInputStream; 5 import java.io.FileNotFoundException; 6 import java.io.IOException; 7 import java.io.InputStream; 8  9 import org.apache.commons.io.IOUtils;10 import org.apache.http.HttpEntity;11 import org.apache.http.HttpResponse;12 import org.apache.http.ParseException;13 import org.apache.http.client.ClientProtocolException;14 import org.apache.http.client.HttpClient;15 import org.apache.http.client.methods.HttpPost;16 import org.apache.http.client.params.ClientPNames;17 import org.apache.http.conn.ClientConnectionManagerFactory;18 import org.apache.http.entity.ByteArrayEntity;19 import org.apache.http.entity.ContentType;20 import org.apache.http.impl.client.DefaultHttpClient;21 import org.apache.http.impl.conn.PoolingClientConnectionManager;22 import org.apache.http.params.BasicHttpParams;23 import org.apache.http.params.CoreConnectionPNames;24 import org.apache.http.params.HttpParams;25 import org.apache.http.util.EntityUtils;26 27 /**28  * 29  * 
对httpclient-4.2.3.jar的简单使用
30  * @ClassName: HttpClientTest31  * @author 冯浩  2017年1月22日 下午2:48:4332  * @see TODO33  */34 public class HttpClientTest {35     36     @org.junit.Test37     public void Test() throws IOException{38         long start=System.currentTimeMillis();39         HttpParams params=new BasicHttpParams();40         Integer CONNECTION_TIMEOUT=2*1000;//请求超时-41         Integer SO_TIMEOUT=2*1000;//等待数据超时42         long CONN_MANAGER_TIMEOUT=500L;//连接不够时，等待超时时间43         params.setIntParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, CONNECTION_TIMEOUT);44         params.setIntParameter(CoreConnectionPNames.SO_TIMEOUT, SO_TIMEOUT);45         params.setLongParameter(ClientPNames.CONN_MANAGER_TIMEOUT, CONN_MANAGER_TIMEOUT);46         //提交之前进行连接测试47         params.setBooleanParameter(CoreConnectionPNames.STALE_CONNECTION_CHECK, true);48         49         PoolingClientConnectionManager manager=new PoolingClientConnectionManager();50         manager.setMaxTotal(200);//连接池的最大连接数-pool的大小51         manager.setDefaultMaxPerRoute(manager.getMaxTotal());//根据链接到的主机对池子大小进行细分52         HttpClient client=new DefaultHttpClient(manager,params);53         54         String url="http://******:8080/com.*************/****/*****";55         HttpPost post=new HttpPost(url);56         HttpResponse response=null;57         InputStream is=new FileInputStream(new File("D:/axtmp/20160815_120436-491.xml"));58         59         HttpEntity en=new ByteArrayEntity(IOUtils.toByteArray(is),ContentType.TEXT_XML);60         post.setEntity(en);61         try {62              response = client.execute(post);63         } catch (ClientProtocolException e) {64             e.printStackTrace();65         } catch (IOException e) {66             e.printStackTrace();67         }68         HttpEntity entity = response.getEntity();69         try {70             String result = EntityUtils.toString(entity, "utf-8");71             long end=System.currentTimeMillis();72             System.out.println("\nresult is "+result);73             System.out.println("\nprocess is "+(end-start)+" mills");74         } catch (ParseException e) {75             e.printStackTrace();76         } catch (IOException e) {77             e.printStackTrace();78         }79     }80 81 }