android+php无法上传图片？

Posted 2023-02-25

技术标签:

【中文标题】android+php无法上传图片？【英文标题】：android+php not able to upload image? 【发布时间】：2012-06-30 04:19:07 【问题描述】：

我正在使用 localhost 进行 php。

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import android.util.Log;

public class ImageUpload 
    HttpURLConnection _httpurlconnection;
    DataOutputStream _dos;
    DataInputStream _dis;
    String _serverurl="http://192.168.1.11/project/imageupload.php";
    String _lineend= "\r\n";
    String _twohyphens= "--";
    String _boundry="*****";
    int _bytesread, _bytesavailable, _buffersize;
    byte[] _buffer;
    int _maxbuffersize = 1 * 1024 * 1024;

    public void uploadImage(String _filepath) 
        try 
            FileInputStream _fis = new FileInputStream(new File(_filepath));
            URL _url = new URL(_serverurl);
            _httpurlconnection = (HttpURLConnection) _url.openConnection();
            _httpurlconnection.setDoInput(true);
            _httpurlconnection.setDoOutput(true);
            _httpurlconnection.setUseCaches(false);
            _httpurlconnection.setRequestMethod("POST");
            _httpurlconnection.setRequestProperty("Connection", "Keep-Alive");
            _httpurlconnection.setRequestProperty("Connection-Type",
                    "multipart/form-data;boundry=" + _boundry);
            _dos = new DataOutputStream(_httpurlconnection.getOutputStream());
            _dos.writeBytes(_twohyphens + _boundry + _lineend);
            _dos.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\""
                + _filepath + "\"" + _lineend);

            _dos.writeBytes(_lineend);

            _bytesavailable = _fis.available();
            _buffersize = Math.min(_bytesavailable, _maxbuffersize);
            _buffer = new byte[_buffersize];
            _bytesread = _fis.read(_buffer, 0, _buffersize);


            while (_bytesread > 0) 


                _dos.write(_buffer, 0, _buffersize);
                _bytesavailable = _fis.available();
                _buffersize = Math.min(_bytesavailable, _maxbuffersize);
                _bytesread = _fis.read(_buffer, 0, _buffersize);

            
            _dos.writeBytes(_lineend);
            _dos.writeBytes(_twohyphens + _boundry + _twohyphens + _lineend);

            int responsecode = _httpurlconnection.getResponseCode();
            String responsemessage = _httpurlconnection.getResponseMessage();
            _fis.close();
            _dos.flush();
            _dos.close();

            BufferedReader br=new BufferedReader(new InputStreamReader(_httpurlconnection.getInputStream()));
            String line;
            while((line=br.readLine())!=null)
            
                Log.i("----------------",">>"+line);
            
            br.close();

         catch (Exception e) 
            e.printStackTrace();

这是我的 php 代码。

<?php

$target_path  = "/var/www/project";
$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);
if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) 
 echo "The file ".  basename( $_FILES['uploadedfile']['name']).
 " has been uploaded";
 else
 echo "There was an error uploading the file, please try again!";

?>

但我收到通知：未定义索引：第 5 行的上传文件。谁能帮我解决这个问题？

【问题讨论】：

【参考方案1】：

看起来您提供给服务器的_filepath 文件夹在服务器上不存在。

【讨论】：

【参考方案2】：

未定义索引警告表明，无论出于何种原因，文件uploadedfile 都不存在于请求中。

这个问题有一些常见的警告，最初与 php.ini 文件中的配置指令有关。

max_post_size

upload_max_filesize

max_execution_time

缩小范围，错误通常在于客户端代码，无论是网页浏览器中的 html/js 和被遗忘的enctype，还是像您这样的移动设备上的本机代码。