Java HttpClient 傳送multipart/form-data帶有Json檔案的Post請求

說明：傳送multipart/form-data帶有Json檔案的Post請求，檔案內容其實就是json字串，這種請求之前都是通過postman發的，見postman截圖：

目前但是要做介面自動化測試，所以須用程式碼實現。

直接貼程式碼：
（需要至少2個jar包：httpclient-4.5.3.jar，httpmime-4.3.jar）

import java.io.File;
import java.io.FileInputStream;
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.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class HttpMultipartFormdataDemo1 {

	public static void main(String[] args) throws ClientProtocolException, IOException {
		// 檔案sTestsetFile：solr_etl_agent35.json是存有JSON字串的檔案
		String sTestsetFile=System.getProperty("user.dir")+File.separator+"testdata"+File.separator+"solr_etl_agent35.json";
		String sURL="http://172.16.101.46:14401/editorialincre";
		
		CloseableHttpClient httpClient = HttpClients.createDefault();
		HttpPost uploadFile = new HttpPost(sURL);
		
		MultipartEntityBuilder builder = MultipartEntityBuilder.create();
		builder.addTextBody("field1", "yes", ContentType.TEXT_PLAIN);

		// 把檔案加到HTTP的post請求中
		File f = new File(sTestsetFile);
		builder.addBinaryBody(
		    "file",
		    new FileInputStream(f),
		    ContentType.APPLICATION_OCTET_STREAM,
		    f.getName()
		);

		HttpEntity multipart = builder.build();
		uploadFile.setEntity(multipart);
		CloseableHttpResponse response = httpClient.execute(uploadFile);
		HttpEntity responseEntity = response.getEntity();
		String sResponse=EntityUtils.toString(responseEntity, "UTF-8");
		System.out.println("Post 返回結果"+sResponse);
	}

}
 

在這做個記錄，同時也能給大家參考。