問題描述：

multipart/form-data上傳文件，文件名亂碼問題

定位：

定位在發送請求時，已經亂碼：

Content-Disposition： "form-data; name="file"; filename="??test.txt"
Content-Type： application/octet-stream
Content-Transfer-Encoding： binary

解決方法：

MultipartEntity 創建時，添加參數：

MultipartEntityBuilder reqEntity = MultipartEntityBuilder.create();

reqEntity.setCharset(Charset.forName( "UTF-8" ));

reqEntity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);

 

 

示例代碼如下：

package com.company;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import java.util.Base64;
import org.json.JSONObject;
import java.nio.charset.Charset ;
import java.io.*;

public class test2 {

    public static void doFormDataPost(String path, String sURL) throws IOException {

        File file = new File(path);
        String file_name = file.getName();
        System.out.println(file_name);
        HttpClient context = new DefaultHttpClient();
        HttpPost post = new HttpPost(sURL);
        //傳遞文件參數以及文本參數
        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
        builder.setCharset(Charset.forName("UTF-8"));//設置編碼，解決中文亂碼問題
        builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
        builder.addBinaryBody("files", file);//添加文件
        builder.addTextBody("loginUser", "11");//添加文本類型參數
        builder.addTextBody("fileType",  "111");  //添加文本類型參數
        builder.addTextBody("oaFlowId",  "1111");  //添加文本類型參數
        //將文件名稱-bash64編碼
        Base64.Encoder encoder = Base64.getEncoder();
        byte[] textByte = file_name.getBytes("UTF-8");
        String encodedText = encoder.encodeToString(textByte);
        builder.addTextBody("fileName",  encodedText);  //添加文本類型參數

        //發送post請求
        post.setEntity(builder.build());
        HttpResponse response = context.execute(post);
        HttpEntity responseEntity = response.getEntity();
        String resEntity= EntityUtils.toString(responseEntity, "UTF-8");
        JSONObject jsonObj = new JSONObject(resEntity);
        String ret_msg = (String) jsonObj.get("message");
        Integer ret_code = (Integer) jsonObj.get("return_code");
        System.out.println(jsonObj);

    }

    public static void main(String[] args) {
        try {
            String strpath = "D:/風管系統測試文件.txt";
            doFormDataPost(strpath ,"http://127.0.0.1/raycom/api/knowledge/upload/");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}