在尝试利用 PHP 将文件从 Java 上传到 Apache 服务器时,利用 Jakarta 创建了一个 Java 应用程序HttpClient 库版本 4.0 beta2。然而,PHP 脚本无法识别上传的文件,导致 $_FILES 数组为空。
最初的 Java 代码不正确,从下面的修改版本可以看出:
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(); } }
主要区别在于使用了 MultipartEntity,它可以正确处理文件上传。
PHP 脚本保持不变:
通过在Java代码中使用MultipartEntity,解决了PHP脚本无法检测到上传文件的问题,并且可以成功在服务器上传输和处理文件.
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