JAVA Httpclient3.x与Httpclient4.x代码对比（post方法）

Httpclient4.x post方法代码：

 1 import java.io.BufferedReader;
 2 import java.io.IOException;
 3 import java.io.InputStream;
 4 import java.io.InputStreamReader;
 5 import java.io.UnsupportedEncodingException;
 6 import java.util.ArrayList;
 7 import java.util.List;
 8 import org.apache.http.Consts;
 9 import org.apache.http.HttpEntity;
10 import org.apache.http.HttpResponse;
11 import org.apache.http.ParseException;
12 import org.apache.http.client.ClientProtocolException;
13 import org.apache.http.client.HttpClient;
14 import org.apache.http.client.entity.UrlEncodedFormEntity;
15 import org.apache.http.client.methods.HttpPost;
16 import org.apache.http.impl.client.DefaultHttpClient;
17 import org.apache.http.message.BasicNameValuePair;
18 import org.apache.http.util.EntityUtils;
19
20 public class test01 {
21      public static void main(String argv[]){
22             HttpClient client=new DefaultHttpClient();
23             List<BasicNameValuePair> formparams = new ArrayList<BasicNameValuePair>();
24             formparams.add(new BasicNameValuePair("money", "xx"));
25             formparams.add(new BasicNameValuePair("tele_num", "xxxxxxxxxxx"));
26             UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, Consts.UTF_8);
27             HttpPost httppost = new HttpPost("http://xxxx.xxxxxx.xx/xxx/xxxxxx");
28             httppost.setEntity(entity);
29
30             HttpResponse response = null;
31             try {
32                 response = client.execute(httppost);
33             } catch (ClientProtocolException e) {
34                 // TODO Auto-generated catch block
35                 e.printStackTrace();
36             } catch (IOException e) {
37                 // TODO Auto-generated catch block
38                 e.printStackTrace();
39             }
40             //打印服务器返回的状态
41
42             System.out.println(response.getStatusLine());
43             HttpEntity Entity = response.getEntity();
44             //打印结果页面
45
46             try {
47                 System.out.println("Response is :"+EntityUtils.toString(Entity));
48             } catch (ParseException e1) {
49                 // TODO Auto-generated catch block
50                 e1.printStackTrace();
51             } catch (IOException e1) {
52                 // TODO Auto-generated catch block
53                 e1.printStackTrace();
54             }
55             if(Entity!=null){
56                 System.out.println("The Response length is :"+Entity.getContentLength());
57             }
58       }
59 }

Httpclient3.x post方法代码：

 1 import java.io.IOException;
 2 import java.io.UnsupportedEncodingException;
 3 import org.apache.commons.httpclient.HttpClient;
 4 import org.apache.commons.httpclient.HttpException;
 5 import org.apache.commons.httpclient.NameValuePair;
 6 import org.apache.commons.httpclient.methods.PostMethod;
 7
 8
 9 public class test02 {
10       public static void main(String argv[]){
11             HttpClient client = new HttpClient();
12             client.getHostConfiguration().setHost("xxxx.xxxxxx.xx", 80, "http");
13             PostMethod post = new PostMethod("http://xxxx.xxxxxx.xx/xxx/xxxxxx");
14             NameValuePair money = new NameValuePair("money","xx");
15             NameValuePair tele_num = new NameValuePair("tele_num", "xxxxxxxxxxx");
16             post.setRequestBody(new NameValuePair[] { money, tele_num});
17
18             try {
19                 client.executeMethod(post);
20             } catch (HttpException e) {
21                 // TODO Auto-generated catch block
22                 e.printStackTrace();
23             } catch (IOException e) {
24                 // TODO Auto-generated catch block
25                 e.printStackTrace();
26             }
27             //打印服务器返回的状态
28             System.out.println("服务器返回的状态是: "+post.getStatusLine());
29             //打印结果页面
30             String response = null;
31             try {
32                 response = new String(post.getResponseBodyAsString().getBytes("UTF-8"));
33             } catch (UnsupportedEncodingException e) {
34                 // TODO Auto-generated catch block
35                 e.printStackTrace();
36             } catch (IOException e) {
37                 // TODO Auto-generated catch block
38                 e.printStackTrace();
39             }
40             //打印返回的信息
41             System.out.println("返回的信息是: "+response);
42             post.releaseConnection();
43
44       }
45 }

附参考：http://hc.apache.org/httpcomponents-client-ga/tutorial/html/