如何使用Java的HttpClient庫正確上傳檔案到PHP伺服器？

如何使用Java HttpClient 庫和PHP 上傳文件

問題：

A使用HttpClient庫版本4.0 beta2 的Java應用程式嘗試將檔案上傳到執行 PHP 的 Apache 伺服器，但是PHP 腳本無法辨識該檔案。

解決方案：

原始 Java 程式碼使用 FileEntity 物件來傳輸文件，這是不正確的。正確的方法是使用 MultipartEntity 將檔案封裝為 multipart/form-data 請求。

import java.io.File;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.ContentBody;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreProtocolPNames;
import org.apache.http.util.EntityUtils;


public class PostFile {
  public static void main(String[] args) throws Exception {
    HttpClient httpclient = new DefaultHttpClient();
    httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);

    HttpPost httppost = new HttpPost("http://localhost:9001/upload.php");
    File file = new File("c:/TRASH/zaba_1.jpg");

    MultipartEntity mpEntity = new MultipartEntity();
    ContentBody cbFile = new FileBody(file, "image/jpeg");
    mpEntity.addPart("userfile", cbFile);


    httppost.setEntity(mpEntity);
    System.out.println("executing request " + httppost.getRequestLine());
    HttpResponse response = httpclient.execute(httppost);
    HttpEntity resEntity = response.getEntity();

    System.out.println(response.getStatusLine());
    if (resEntity != null) {
      System.out.println(EntityUtils.toString(resEntity));
    }
    if (resEntity != null) {
      resEntity.consumeContent();
    }

    httpclient.getConnectionManager().shutdown();
  }
}

透過合併這些更改，檔案上傳功能應該按預期工作，並且檔案將成功被 PHP 腳本識別。

以上是如何使用Java的HttpClient庫正確上傳檔案到PHP伺服器？的詳細內容。更多資訊請關注PHP中文網其他相關文章！