Android 上传文件到服务器

【Android 上传文件到服务器】胸怀万里世界，放眼无限未来。这篇文章主要讲述Android 上传文件到服务器相关的知识，希望能为你提供帮助。
android端实现文件上传
1)、新建一个Android项目命名为androidUpload，目录结构如下：

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2)、新建FormFile类，用来封装文件信息

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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 = https://www.songbingjia.com/android/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

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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}); } }

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4)、新建MainActivity类，实现每隔5秒上传一次

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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"); } }

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5)、修改清单文件

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< ?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>