[Java知识库] multipart/form-data格式接口调用工具类

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[Java知识库]multipart/form-data格式接口调用工具类

1、添加依赖

    <dependencies>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
        </dependency>
    </dependencies>

2、举例工具类（具体请求参数自调）

package com.xpf.utils;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.HttpMultipartMode;
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;

import java.io.IOException;
import java.io.InputStream;
import java.net.URISyntaxException;
import java.nio.charset.Charset;
import java.util.HashMap;

public class MulFormDataUtils {


    /**
     * multipart/form-data格式接口调用
     * @param headMap 请求头（自行根据调用接口封装）
     * @param url
     * @param paramMap 请求参数（自行根据调用接口封装）
     * @param inputStream
     * @return
     */
    public static String doPostUploadFile(HashMap<String, Object> headMap, String url, HashMap<String, Object> paramMap, InputStream inputStream){

        CloseableHttpClient client = HttpClients.createDefault();
        HttpPost post = new HttpPost();

        try {
            URIBuilder builder = new URIBuilder(url);
        } catch (URISyntaxException e) {
            e.printStackTrace();
        }

        //封装请求头head
        //（ 千万千万不要把 "Content-Type":"multipart/form-data" 封装进请求头，否则会请求出错 ）
        headMap.entrySet().forEach(p -> post.setHeader(p.getKey(), String.valueOf(p.getValue()) ));

        //解决中文乱码问题
        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
        builder.setCharset(Charset.forName("UTF-8"));
        builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
        builder.addBinaryBody("file", inputStream, ContentType.DEFAULT_BINARY.withCharset("UTF-8"), String.valueOf(paramMap.get("title")));

        //(这个是要调的接口的参数，根据实际情况组装)解决文件名中文乱码（？？？）
        builder.addTextBody("title", String.valueOf(paramMap.get("title")), ContentType.DEFAULT_TEXT.withCharset("UTF-8"));
        builder.addTextBody("fileType", String.valueOf(paramMap.get("fileType")));

        HttpEntity entity = builder.build();
        post.setEntity(entity);
        String result = null;

        try {
            HttpResponse response = client.execute(post);
            result = EntityUtils.toString(response.getEntity(), "UTF-8");

        } catch (IOException e) {
            e.printStackTrace();
        }

        return result;
    }


}