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7.15Java之调用API接口传表单获取返回信息

实例

package GoogleTranslateAPI;
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import com.alibaba.fastjson.JSON;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.methods.CloseableHttpResponse;
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.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
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import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
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/**
 * 使用HttpClient类测试翻译接口
 * @since JDK 1.8
 * @date 2021/07/15
 * @author Lucifer
 */
public class TranslateAPITest {
    //定义接口API地址
    private static final String Url = "";
    /**
     *用HttpClient类下的方法创建POST请求demo
     */
    public static void doPostForm(String url) throws IOException {
        //使用HttpClient创建客户端
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();
        //创建HttpPost类引用
        HttpPost httpPost = new HttpPost(url);
        /*这个httpPost既是我们的表单*/
        ListNameValuePair> nameValuePairs = new ArrayListNameValuePair>();
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        //在List引用里面添加参数
        nameValuePairs.add(new BasicNameValuePair("trans_data","[{\"custom_index\":1," +
                "\"lang_tgt\":\"zh\"," +
                "\"trans_text\":\"HelloWorld\"}]"));
//        UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(nameValuePairs);
//        httpPost.setEntity(urlEncodedFormEntity);
//        httpClient.execute(httpPost);
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        //将参数放在请求体里面传过去的
        String jsonString = JSON.toJSONString(nameValuePairs);
        StringEntity stringEntity = new StringEntity(jsonString, "UTF-8");
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        //将entity放入post请求体中
        httpPost.setEntity(stringEntity);
        httpPost.setHeader("Content-Type", "multipart/form-data;charset=utf8");
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        //响应模型
        CloseableHttpResponse response = null;
        try {
            //由客户端执行发送Post请求
            response = httpClient.execute(httpPost);
            //从响应模型中获得响应实体
            HttpEntity responseEntity = response.