android上传文件和参数到web服务器，php接收并保存

最近在做的Android应用需要用到文件上传功能，所以在网上查了好多资料。这篇说的比较清楚，所以转了。

原文链接：原文：android上传文件和参数到web服务器，php接收并保存

由于工作需要，学习了下android端上传文件到web服务器，服务器端使用php。
网上很多方法中并没有介绍参数如何和文件同时传送给服务器，本文给出了方法。

下面http请求中，实际生成的头部如下所示：Host: example.comContent-type: multipart/form-data, boundary=ahhjifeohiawfContent-Length: $requestlen–ahhjifeohiawfcontent-disposition: form-data; name=”param1″heihei–ahhjifeohiawfcontent-disposition: form-data; name=”param2″haha–ahhjifeohiawfcontent-disposition: form-data; name=”uploadfile”; filename=”android.pdf”(文件数据略)–ahhjifeohiawf–

boundary是标示符，要保证它的值不出现在要传送的数据中，详细请看代码注释。

下面是详细android端和php端的代码

package cn.beyondcompare.uploader;import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.ProtocolException;import java.net.URL;import org.apache.http.HttpStatus;import android.content.Context;import android.util.Log;public class UploadTools {private static final String TAG = "[UploadTools]:";private Context context = null;private String serverUrl = null;private String param1 = null;private String param2 = null;private String filePath = null;private String fileName = null;private static final int DEFAULT_BUFF_SIZE = 8192;private static final int READ_TIMEOUT = 15000;private static final int CONNECTION_TIMEOUT = 15000;private UploadListener uploadListener = null;public UploadTools(Context context, String url, String param1, String param2, String filePath, String fileName) {this.context = context;this.serverUrl = url;this.param1 = param1;this.param2 = param2;this.filePath = filePath;this.fileName = fileName;}public void setUploadListener(UploadListener listener) {this.uploadListener = listener;}public void uploadFile() throws MalformedURLException, ProtocolException, FileNotFoundException, IOException {String lineEnd = "\r\n";String twoHyphens = "--";String boundary = "ahhjifeohiawf";// 各个参数的间隔符，可自定义，但不能与发送内容有重复部分if (context == null || serverUrl == null || param1 == null || param2 == null || filePath == null || fileName == null) {return;}URL url = new URL(serverUrl);HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();// 设置每次传输的流大小，可以有效防止手机因为内存不足崩溃// 此方法用于在预先不知道内容长度时启用没有进行内部缓冲的 HTTP 请求正文的流。httpURLConnection.setChunkedStreamingMode(128 * 1024);// 128K// 允许输入输出流httpURLConnection.setDoInput(true);httpURLConnection.setDoOutput(true);httpURLConnection.setUseCaches(false);// 超时时间设置httpURLConnection.setReadTimeout(READ_TIMEOUT);httpURLConnection.setConnectTimeout(CONNECTION_TIMEOUT);// 使用POST方法httpURLConnection.setRequestMethod("POST");httpURLConnection.setRequestProperty("Connection", "Keep-alive");httpURLConnection.setRequestProperty("Charset", "UTF-8");httpURLConnection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);DataOutputStream dos = new DataOutputStream(httpURLConnection.getOutputStream());// 发送jsonStrdos.writeBytes(twoHyphens + boundary + lineEnd);dos.writeBytes("Content-Disposition: form-data; name=\"param1\"" + lineEnd);dos.writeBytes(lineEnd);dos.writeBytes(param1);dos.writeBytes(lineEnd);// 发送acriondos.writeBytes(twoHyphens + boundary + lineEnd);dos.writeBytes("Content-Disposition: form-data; name=\"param2\"" + lineEnd);dos.writeBytes(lineEnd);dos.writeBytes(param2);dos.writeBytes(lineEnd);// 发送文件dos.writeBytes(twoHyphens + boundary + lineEnd);dos.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\"; filename=\"" + fileName + "\"" + lineEnd);dos.writeBytes(lineEnd);String srcPath = filePath + fileName;FileInputStream fis = new FileInputStream(srcPath);byte[] buffer = new byte[DEFAULT_BUFF_SIZE]; // 8kint counter = 0;int count = 0;// 读取文件while ((count = fis.read(buffer)) != -1) {dos.write(buffer, 0, count);counter += count;if (uploadListener != null) {uploadListener.onUploadProcess(counter);}}fis.close();dos.writeBytes(lineEnd);dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);// 最后多出"--"作为结束dos.flush();if (httpURLConnection.getResponseCode() == HttpStatus.SC_OK) {BufferedReader reader = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream()), 8192);// 8kStringBuilder sb = new StringBuilder();String line = null;try {while ((line = reader.readLine()) != null) {sb.append(line + "\n");}} catch (IOException e) {e.printStackTrace();}if (uploadListener != null) {uploadListener.onUploadFinished(sb.toString());}} else {Log.d(TAG, "Http request failed!");if (uploadListener != null) {uploadListener.onUploadFinished("Http request failed!");}}if (httpURLConnection != null) {httpURLConnection.disconnect();}}}

另外两段Android代码我没转，因为这段上传的代码是最关键的。

PHP接收的代码

< ?php  echo "param1=".$_POST['param1'].chr(13).chr(10);echo "param2=".$_POST['param2'].chr(13).chr(10);$target_path  = "./upload/";//接收文件目录  $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!" . $_FILES['uploadedfile']['error'];  }  ?>

参考：

Android上传文件到Web服务器，PHP接收文件（一）

Android上传文件到Web服务器，PHP接收文件（二）

通过 http 协议上传文件(rfc1867协议概述) multipart/form-data;boundary 解释