Question

我有一个卷曲请求，如下所示 -

curl -POST -H 'access-key: <apikey>' -H "Content-type: application/json" -d '{
"item": "electricity",
"region": "india",
"unit": "kWh",
"quantity": 1.564}' 'https://www.carbonhub.xyz/v1/emissions'`

我尝试制作一个java对应物，这是我到现在为止所做的 -

package org.kodejava.example.httpclient;    
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.HttpPost;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class getEmissions {
    public static void main(String[] args) {
        HttpClient client = HttpClientBuilder.create().build();
        HttpPost post = new HttpPost("https://www.carbonhub.xyz/v1/emissions");

        List<NameValuePair> data = new ArrayList<>(4); 
        data.add(new BasicNameValuePair("item", "electricity"));
        data.add(new BasicNameValuePair("region", "india"));
        data.add(new BasicNameValuePair("unit", "kWh"));
        data.add(new BasicNameValuePair("quantity", 1.564));

        try {
            post.setEntity(new UrlEncodedFormEntity(data));
            post.setHeader("Content-Type","application/json");
            // use your api key
            post.setHeader("access-key","<apikey>");
            HttpResponse response = client.execute(post);

            // Print out the response message
            System.out.println(EntityUtils.toString(response.getEntity()));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

请让我知道如何解决这个问题。提前谢谢。

Answer 1

您在POST请求中发送数据的方式不符合指定的curl命令。

您应首先为输入创建一个JSON字符串。您可以使用各种库来实现此目的，例如Jackson，JSON-java，Gson等，或者您可以手动构建JSON字符串（不推荐）然后您应该发送JSON字符串作为POST请求中的数据。

以下是手动构建JSON字符串然后将其作为POST数据发送的一种方法 -

package org.kodejava.example.httpclient;    

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

import java.io.IOException;

public class getEmissions {
    public static void main(String[] args) {
        HttpClient client = HttpClientBuilder.create().build();
        HttpPost post = new HttpPost("https://www.carbonhub.xyz/v1/emissions");

        StringBuilder requestData = new StringBuilder("'{");
        requestData.append("\"item\"").append(':').append("\"electricity\"").append(',');
        requestData.append("\"region\"").append(':').append("\"india\"").append(',');
        requestData.append("\"unit\"").append(':').append("\"kWh\"").append(',');
        requestData.append("\"quantity\"").append(':').append("1.564");
        requestData.append("}'");

        StringEntity requestDataEntity = new StringEntity(requestData.toString(),ContentType.APPLICATION_JSON);
        try {
            post.setEntity(requestData);
            // use your api key
            post.setHeader("access-key","<apikey>");
            HttpResponse response = client.execute(post);

            // Print out the response message
            System.out.println(EntityUtils.toString(response.getEntity()));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

需要帮助将curl请求转换为java请求

1 个答案: