HttpUtil工具类发送post请求

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使用apache的HttpClient发送post请求。

import java.io.IOException;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.ClientProtocolException;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.util.EntityUtils;public class HttpUtil {private static String charset = "utf-8";public static String postMethod(String url, String json) throws ClientProtocolException, IOException{HttpPost httpPost = new HttpPost(url);        CloseableHttpClient client = HttpClients.createDefault();                StringEntity entity = new StringEntity(json, charset);//解决中文乱码问题            entity.setContentEncoding(charset);            entity.setContentType("application/json");            httpPost.setEntity(entity);        HttpResponse response = client.execute(httpPost);        if(response.getStatusLine().getStatusCode() == 200){HttpEntity httpEntity = response.getEntity();return EntityUtils.toString(httpEntity, charset);}return null;}}

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