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【Java】 java使用httpcomponents post发送json数据

作者: / 发布于2017/9/21/ 642

当我们向第三方系统提交数据的时候，需要调用第三方系统提供的接口。不同的系统提供的接口也不一样，有的是SOAP Webservice、RESTful Webservice 或其他的。当使用的是RESTful webservice的时候，就可以使用httpcomponents组件来完成调用。

package com.demo.test;

import java.io.IOException;

import org.apache.http.HttpEntity;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
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 Test {

    public static String sendInfo(String sendurl, String data) {
        CloseableHttpClient client = HttpClients.createDefault();
        HttpPost post = new HttpPost(sendurl);
        StringEntity myEntity = new StringEntity(data,
                ContentType.APPLICATION_JSON);// 构造请求数据
        post.setEntity(myEntity);// 设置请求体
        String responseContent = null; // 响应内容
        CloseableHttpResponse response = null;
        try {
            response = client.execute(post);
            if (response.getStatusLine().getStatusCode() == 200) {
                HttpEntity entity = response.getEntity();
                responseContent = EntityUtils.toString(entity, "UTF-8");
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (response != null)
                    response.close();

            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    if (client != null)
                        client.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return responseContent;
    }

    public static void main(String[] args) {
        String json = "{\"name\":\"zhangsan\", \"age\":20, \"gender\": \"mail\"} ";
        String result = sendInfo("http://www.xxxxx.com/message", json);
        System.out.println(result);
    }
}

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