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>