Post&&Get实现

import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

Get实现(Map)

 1     public static String doGet(String url, Map<String, Object> params) {
 2         String httpStr = "";
 3         StringBuffer param = new StringBuffer();
 4         int i = 0;
 5         for (String key : params.keySet()) {
 6             if (i == 0) {
 7                 param.append("?");
 8             } else {
 9                 param.append("&");
10             }
11             param.append(key).append("=").append(params.get(key));
12             i++;
13         }
14         url += param;
15         CloseableHttpClient httpClient = HttpClients.createDefault();
16         CloseableHttpResponse response = null;
17         try {
18             // 创建httpGet
19             HttpGet httpGet = new HttpGet(url);
20             // 执行get请求.
21             response = httpClient.execute(httpGet);
22             // 获取响应实体
23             HttpEntity entity = response.getEntity();
24             if (entity != null) {
25                 httpStr = EntityUtils.toString(entity, "UTF-8");
26             }
27         } catch (Exception e) {
28             e.printStackTrace();
29         } finally {
30             // 关闭连接,释放资源
31             try {
32                 response.close();
33                 httpClient.close();
34             } catch (Exception e) {
35                 e.printStackTrace();
36             }
37         }
38         return httpStr;
39     }

Post实现(JSON)

    public static String doPost(String url, String json) {
        String httpStr = "";
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);
        CloseableHttpResponse response = null;
        try {
            StringEntity stringEntity = new StringEntity(json,"UTF-8");// 解决中文乱码问题
            stringEntity.setContentEncoding("UTF-8");
            stringEntity.setContentType("application/json");
            httpPost.setEntity(stringEntity);
            response = httpClient.execute(httpPost);
            // 获取响应实体
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                httpStr = EntityUtils.toString(entity, "UTF-8");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            // 关闭连接,释放资源
            try {
                response.close();
                httpClient.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return httpStr;
    }

Post实现(Map)

    public static String doPost(String url, Map<String, Object> params) {
        String httpStr = "";
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);
        CloseableHttpResponse response = null;
        try {
            List<NameValuePair> pairList = new ArrayList<NameValuePair>();
            for (Map.Entry<String, Object> entry : params.entrySet()) {
                NameValuePair pair = new BasicNameValuePair(entry.getKey(),
                        entry.getValue().toString());
                pairList.add(pair);
            }
            httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset
                    .forName("UTF-8")));
            response = httpClient.execute(httpPost);
            // 获取响应实体
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                httpStr = EntityUtils.toString(entity, "UTF-8");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            // 关闭连接,释放资源
            try {
                response.close();
                httpClient.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return httpStr;
    }