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Android上傳文件到服務器的方法

2019-10-23 18:27:28
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本文實例為大家分享了Android端實現文件上傳的具體代碼,供大家參考,具體內容如下

1)、新建一個Android項目命名為androidUpload,目錄結構如下:

Android上傳文件到服務器,Android上傳文件,Android端文件上傳

2)、新建FormFile類,用來封裝文件信息

package com.ljq.utils;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.InputStream;/** * 上傳文件 */public class FormFile { /* 上傳文件的數據 */ private byte[] data; private InputStream inStream; private File file; /* 文件名稱 */ private String filname; /* 請求參數名稱*/ private String parameterName; /* 內容類型 */ private String contentType = "application/octet-stream";  public FormFile(String filname, byte[] data, String parameterName, String contentType) {  this.data = data;  this.filname = filname;  this.parameterName = parameterName;  if(contentType!=null) this.contentType = contentType; }  public FormFile(String filname, File file, String parameterName, String contentType) {  this.filname = filname;  this.parameterName = parameterName;  this.file = file;  try {   this.inStream = new FileInputStream(file);  } catch (FileNotFoundException e) {   e.printStackTrace();  }  if(contentType!=null) this.contentType = contentType; }  public File getFile() {  return file; } public InputStream getInStream() {  return inStream; } public byte[] getData() {  return data; } public String getFilname() {  return filname; } public void setFilname(String filname) {  this.filname = filname; } public String getParameterName() {  return parameterName; } public void setParameterName(String parameterName) {  this.parameterName = parameterName; } public String getContentType() {  return contentType; } public void setContentType(String contentType) {  this.contentType = contentType; } }

3)、新建SocketHttpRequester類,封裝上傳文件到服務器代碼

package com.ljq.utils;import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.InetAddress;import java.net.Socket;import java.net.URL;import java.util.Map;/** * 上傳文件到服務器 *  * @author Administrator * */public class SocketHttpRequester { /**  * 直接通過HTTP協議提交數據到服務器,實現如下面表單提交功能:  * <FORM METHOD=POST ACTION="http://192.168.1.101:8083/upload/servlet/UploadServlet" enctype="multipart/form-data">   <INPUT TYPE="text" NAME="name">   <INPUT TYPE="text" NAME="id">   <input type="file" name="imagefile"/>   <input type="file" name="zip"/>   </FORM>  * @param path 上傳路徑(注:避免使用localhost或127.0.0.1這樣的路徑測試,因為它會指向手機模擬器,你可以使用http://www.iteye.cn或http://192.168.1.101:8083這樣的路徑測試)  * @param params 請求參數 key為參數名,value為參數值  * @param file 上傳文件  */ public static boolean post(String path, Map<String, String> params, FormFile[] files) throws Exception{    final String BOUNDARY = "---------------------------7da2137580612"; //數據分隔線  final String endline = "--" + BOUNDARY + "--/r/n";//數據結束標志    int fileDataLength = 0;  for(FormFile uploadFile : files){//得到文件類型數據的總長度   StringBuilder fileExplain = new StringBuilder();    fileExplain.append("--");    fileExplain.append(BOUNDARY);    fileExplain.append("/r/n");    fileExplain.append("Content-Disposition: form-data;name=/""+ uploadFile.getParameterName()+"/";filename=/""+ uploadFile.getFilname() + "/"/r/n");    fileExplain.append("Content-Type: "+ uploadFile.getContentType()+"/r/n/r/n");    fileExplain.append("/r/n");    fileDataLength += fileExplain.length();   if(uploadFile.getInStream()!=null){    fileDataLength += uploadFile.getFile().length();    }else{     fileDataLength += uploadFile.getData().length;    }  }  StringBuilder textEntity = new StringBuilder();  for (Map.Entry<String, String> entry : params.entrySet()) {//構造文本類型參數的實體數據   textEntity.append("--");   textEntity.append(BOUNDARY);   textEntity.append("/r/n");   textEntity.append("Content-Disposition: form-data; name=/""+ entry.getKey() + "/"/r/n/r/n");   textEntity.append(entry.getValue());   textEntity.append("/r/n");  }  //計算傳輸給服務器的實體數據總長度  int dataLength = textEntity.toString().getBytes().length + fileDataLength + endline.getBytes().length;    URL url = new URL(path);  int port = url.getPort()==-1 ? 80 : url.getPort();  Socket socket = new Socket(InetAddress.getByName(url.getHost()), port);     OutputStream outStream = socket.getOutputStream();  //下面完成HTTP請求頭的發送  String requestmethod = "POST "+ url.getPath()+" HTTP/1.1/r/n";  outStream.write(requestmethod.getBytes());  String accept = "Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*/r/n";  outStream.write(accept.getBytes());  String language = "Accept-Language: zh-CN/r/n";  outStream.write(language.getBytes());  String contenttype = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "/r/n";  outStream.write(contenttype.getBytes());  String contentlength = "Content-Length: "+ dataLength + "/r/n";  outStream.write(contentlength.getBytes());  String alive = "Connection: Keep-Alive/r/n";  outStream.write(alive.getBytes());  String host = "Host: "+ url.getHost() +":"+ port +"/r/n";  outStream.write(host.getBytes());  //寫完HTTP請求頭后根據HTTP協議再寫一個回車換行  outStream.write("/r/n".getBytes());  //把所有文本類型的實體數據發送出來  outStream.write(textEntity.toString().getBytes());     //把所有文件類型的實體數據發送出來  for(FormFile uploadFile : files){   StringBuilder fileEntity = new StringBuilder();    fileEntity.append("--");    fileEntity.append(BOUNDARY);    fileEntity.append("/r/n");    fileEntity.append("Content-Disposition: form-data;name=/""+ uploadFile.getParameterName()+"/";filename=/""+ uploadFile.getFilname() + "/"/r/n");    fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"/r/n/r/n");    outStream.write(fileEntity.toString().getBytes());    if(uploadFile.getInStream()!=null){     byte[] buffer = new byte[1024];     int len = 0;     while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1){      outStream.write(buffer, 0, len);     }     uploadFile.getInStream().close();    }else{     outStream.write(uploadFile.getData(), 0, uploadFile.getData().length);    }    outStream.write("/r/n".getBytes());  }  //下面發送數據結束標志,表示數據已經結束  outStream.write(endline.getBytes());    BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));  if(reader.readLine().indexOf("200")==-1){//讀取web服務器返回的數據,判斷請求碼是否為200,如果不是200,代表請求失敗   return false;  }  outStream.flush();  outStream.close();  reader.close();  socket.close();  return true; }  /**  * 提交數據到服務器  * @param path 上傳路徑(注:避免使用localhost或127.0.0.1這樣的路徑測試,因為它會指向手機模擬器,你可以使用http://www.itcast.cn或http://192.168.1.10:8080這樣的路徑測試)  * @param params 請求參數 key為參數名,value為參數值  * @param file 上傳文件  */ public static boolean post(String path, Map<String, String> params, FormFile file) throws Exception{  return post(path, params, new FormFile[]{file}); }}

4)、新建MainActivity類,實現每隔5秒上傳一次

package com.ljq.activity;import java.io.File;import java.util.HashMap;import java.util.Map;import android.app.Activity;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.util.Log;import com.ljq.utils.FormFile;import com.ljq.utils.SocketHttpRequester;public class MainActivity extends Activity { private File file; private Handler handler; private static final String TAG="MainActivity"; @Override public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.main);  Log.i(TAG, "onCreate");    file = new File(Environment.getExternalStorageDirectory(), "123.rmvb");  Log.i(TAG, "照片文件是否存在:"+file);  handler=new Handler();  handler.post(runnable); }  Runnable runnable=new Runnable() {   public void run() {   Log.i(TAG, "runnable run");   uploadFile(file);   handler.postDelayed(runnable, 5000);  }  };  /**  * 上傳圖片到服務器  *   * @param imageFile 包含路徑  */ public void uploadFile(File imageFile) {  Log.i(TAG, "upload start");  try {   String requestUrl = "http://192.168.1.101:8083/upload/upload/execute.do";   //請求普通信息   Map<String, String> params = new HashMap<String, String>();   params.put("username", "張三");   params.put("pwd", "zhangsan");   params.put("age", "21");   params.put("fileName", imageFile.getName());   //上傳文件   FormFile formfile = new FormFile(imageFile.getName(), imageFile, "image", "application/octet-stream");      SocketHttpRequester.post(requestUrl, params, formfile);   Log.i(TAG, "upload success");  } catch (Exception e) {   Log.i(TAG, "upload error");   e.printStackTrace();  }  Log.i(TAG, "upload end"); }}

5)、修改清單文件

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.ljq.activity" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".MainActivity"  android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <uses-sdk android:minSdkVersion="4" /> <uses-permission android:name="android.permission.INTERNET" /> </manifest> 

以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持VEVB武林網。


注:相關教程知識閱讀請移步到Android開發頻道。
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