Android上传文件到服务器的方法

本文实例为大家分享了Android端实现文件上传的具体代码，供大家参考，具体内容如下

1)、新建一个Android项目命名为androidUpload，目录结构如下：

2)、新建FormFile类，用来封装文件信息

package com.ljq.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;

/**
 * 上传文件
 */
public class FormFile {
 /* 上传文件的数据 */
 private byte[] data;
 private InputStream inStream;
 private File file;
 /* 文件名称 */
 private String filname;
 /* 请求参数名称*/
 private String parameterName;
 /* 内容类型 */
 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类，封装上传文件到服务器代码

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;

/**
 * 上传文件到服务器
 *
 * @author Administrator
 *
 */
public class SocketHttpRequester {
 /**
  * 直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能:
  * <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 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.iteye.cn或http://192.168.1.101:8083这样的路径测试)
  * @param params 请求参数 key为参数名,value为参数值
  * @param file 上传文件
  */
 public static boolean post(String path, Map<String, String> params, FormFile[] files) throws Exception{
  final String BOUNDARY = "---------------------------7da2137580612"; //数据分隔线
  final String endline = "--" + BOUNDARY + "--\r\n";//数据结束标志

  int fileDataLength = 0;
  for(FormFile uploadFile : files){//得到文件类型数据的总长度
   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()) {//构造文本类型参数的实体数据
   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");
  }
  //计算传输给服务器的实体数据总长度
  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请求头的发送
  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());
  //写完HTTP请求头后根据HTTP协议再写一个回车换行
  outStream.write("\r\n".getBytes());
  //把所有文本类型的实体数据发送出来
  outStream.write(textEntity.toString().getBytes());
  //把所有文件类型的实体数据发送出来
  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());
  }
  //下面发送数据结束标志，表示数据已经结束
  outStream.write(endline.getBytes());

  BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
  if(reader.readLine().indexOf("200")==-1){//读取web服务器返回的数据，判断请求码是否为200，如果不是200，代表请求失败
   return false;
  }
  outStream.flush();
  outStream.close();
  reader.close();
  socket.close();
  return true;
 }

 /**
  * 提交数据到服务器
  * @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080这样的路径测试)
  * @param params 请求参数 key为参数名,value为参数值
  * @param file 上传文件
  */
 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类，实现每隔5秒上传一次

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);
  }

 };

 /**
  * 上传图片到服务器
  *
  * @param imageFile 包含路径
  */
 public void uploadFile(File imageFile) {
  Log.i(TAG, "upload start");
  try {
   String requestUrl = "http://192.168.1.101:8083/upload/upload/execute.do";
   //请求普通信息
   Map<String, String> params = new HashMap<String, String>();
   params.put("username", "张三");
   params.put("pwd", "zhangsan");
   params.put("age", "21");
   params.put("fileName", imageFile.getName());
   //上传文件
   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)、修改清单文件

<?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内容，希望对大家的学习有所帮助，也希望大家多多支持我们。