使用httpClient發送http請求

1、使用httpclient發送http請求依賴的jar包；

1         <dependency>
 2             <groupId>org.apache.httpcomponents</groupId>
 3             <artifactId>httpclient</artifactId>
 4             <version>4.5</version>
 5         </dependency>
 6 
 7         <dependency>
 8             <groupId>org.apache.httpcomponents</groupId>
 9             <artifactId>httpcore</artifactId>
10             <version>4.4.4</version>
11         </dependency>
12 
13         <dependency>
14             <groupId>org.apache.httpcomponents</groupId>
15             <artifactId>httpmime</artifactId>
16             <version>4.5</version>
17         </dependency>

package jarvin.httprequest;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
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.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;


@SuppressWarnings("deprecation")
public class HttpRequestUtil {
        
    @SuppressWarnings("deprecation")
    public static String httpClientPost(String urlParam, Map<String, Object> params, String charset) {  
            StringBuffer resultBuffer = null;  
            HttpClient client = new DefaultHttpClient();  
            HttpPost httpPost = new HttpPost(urlParam);  
            // 構建請求參數  
            List<NameValuePair> list = new ArrayList<NameValuePair>();  
            Iterator<Entry<String, Object>> iterator = params.entrySet().iterator();  
            while (iterator.hasNext()) {  
                Entry<String, Object> elem = iterator.next();  
                list.add(new BasicNameValuePair(elem.getKey(), String.valueOf(elem.getValue())));  
            }  
            BufferedReader br = null;  
            try {  
                if (list.size() > 0) {  
                    UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, charset);  
                    httpPost.setEntity(entity);  
                }  
                HttpResponse response = client.execute(httpPost);  
                // 讀取服務器響應數據  
                resultBuffer = new StringBuffer();  
                br = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));  
                String temp;  
                while ((temp = br.readLine()) != null) {  
                    resultBuffer.append(temp);  
                }  
            } catch (Exception e) {  
                throw new RuntimeException(e);  
            } finally {  
                if (br != null) {  
                    try {  
                        br.close();  
                    } catch (IOException e) {  
                        br = null;  
                        throw new RuntimeException(e);  
                    }  
                }  
            }  
            return resultBuffer.toString();  
        }  
    
    
      public static String httpClientGet(String urlParam, Map<String, Object> params, String charset) {  
            StringBuffer resultBuffer = null;  
            HttpClient client = new DefaultHttpClient();  
            BufferedReader br = null;  
            // 構建請求參數  
            StringBuffer sbParams = new StringBuffer();  
            if (params != null && params.size() > 0) {  
                for (Entry<String, Object> entry : params.entrySet()) {  
                    sbParams.append(entry.getKey());  
                    sbParams.append("=");  
                    try {  
                        sbParams.append(URLEncoder.encode(String.valueOf(entry.getValue()), charset));  
                    } catch (UnsupportedEncodingException e) {  
                        throw new RuntimeException(e);  
                    }  
                    sbParams.append("&");  
                }  
            }  
            if (sbParams != null && sbParams.length() > 0) {  
                urlParam = urlParam + "?" + sbParams.substring(0, sbParams.length() - 1);  
            }  
            HttpGet httpGet = new HttpGet(urlParam);  
            try {  
                HttpResponse response = client.execute(httpGet);  
                // 讀取服務器響應數據  
                br = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));  
                String temp;  
                resultBuffer = new StringBuffer();  
                while ((temp = br.readLine()) != null) {  
                    resultBuffer.append(temp);  
                }  
            } catch (Exception e) {  
                throw new RuntimeException(e);  
            } finally {  
                if (br != null) {  
                    try {  
                        br.close();  
                    } catch (IOException e) {  
                        br = null;  
                        throw new RuntimeException(e);  
                    }  
                }  
            }  
            return resultBuffer.toString();  
        }  

}