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。