android通过HTTP协议上传文件至远程服务器
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android通过HTTP协议上传文件至远程服务器
ht896632 发表于2年前
android通过HTTP协议上传文件至远程服务器
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1.通过浏览器上传文件捕获的数据截图,也就意味着在android客户端也必须遵循这样的数据方式。

2.android客户端上传工具类

   将以上数据中的字段封装为一个上传文件的实体对象。

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";
	/**
	 * 小文件上传(建议)
	 * @param filname
	 * @param data 文件数据
	 * @param parameterName
	 * @param contentType
	 */
	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;
	}
	/**
	 * 上传大文件(建议)
	 * @param file 文件
	 * @param parameterName
	 * @param contentType
	 */
	public FormFile(File file, String parameterName, String contentType) {
		this.filname = file.getName();
		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.实现上传文件的业务逻辑工具类

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://192.168.1.107:8080/ManageServlet" 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
	 * @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");
 	        fileDataLength += fileExplain.length();
        	if(uploadFile.getInStream()!=null){
        		fileDataLength += uploadFile.getFile().length();
	 	    }else{
	 	    	fileDataLength += uploadFile.getData().length;
	 	    }
        	fileDataLength += "\r\n".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
	 * @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});
	}
	/**
	 * 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
	 * @param params 请求参数 key为参数名,value为参数值
	 * @param encode 编码
	 */
	public static byte[] postFromHttpClient(String path, Map<String, String> params, String encode) throws Exception{
		List<NameValuePair> formparams = new ArrayList<NameValuePair>();//用于存放请求参数
		for(Map.Entry<String, String> entry : params.entrySet()){
			formparams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
		}
		UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, encode);
		HttpPost httppost = new HttpPost(path);
		httppost.setEntity(entity);
		HttpClient httpclient = new DefaultHttpClient();//看作是浏览器
		HttpResponse response = httpclient.execute(httppost);//发送post请求		
		return readStream(response.getEntity().getContent());
	}

	/**
	 * 发送请求
	 * @param path 请求路径
	 * @param params 请求参数 key为参数名称 value为参数值
	 * @param encode 请求参数的编码
	 */
	public static byte[] post(String path, Map<String, String> params, String encode) throws Exception{
		StringBuilder parambuilder = new StringBuilder("");
		if(params!=null && !params.isEmpty()){
			for(Map.Entry<String, String> entry : params.entrySet()){
				parambuilder.append(entry.getKey()).append("=")
					.append(URLEncoder.encode(entry.getValue(), encode)).append("&");
			}
			parambuilder.deleteCharAt(parambuilder.length()-1);
		}
		byte[] data = parambuilder.toString().getBytes();
		URL url = new URL(path);
		HttpURLConnection conn = (HttpURLConnection)url.openConnection();
		conn.setDoOutput(true);//允许对外发送请求参数
		conn.setUseCaches(false);//不进行缓存
		conn.setConnectTimeout(5 * 1000);
		conn.setRequestMethod("POST");
		//下面设置http请求头
		conn.setRequestProperty("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, */*");
		conn.setRequestProperty("Accept-Language", "zh-CN");
		conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");
		conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
		conn.setRequestProperty("Content-Length", String.valueOf(data.length));
		conn.setRequestProperty("Connection", "Keep-Alive");
		
		//发送参数
		DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
		outStream.write(data);//把参数发送出去
		outStream.flush();
		outStream.close();
		if(conn.getResponseCode()==200){
			return readStream(conn.getInputStream());
		}
		return null;
	}
	
	/**
	 * 读取流
	 * @param inStream
	 * @return 字节数组
	 * @throws Exception
	 */
	public static byte[] readStream(InputStream inStream) throws Exception{
		ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
		byte[] buffer = new byte[1024];
		int len = -1;
		while( (len=inStream.read(buffer)) != -1){
			outSteam.write(buffer, 0, len);
		}
		outSteam.close();
		inStream.close();
		return outSteam.toByteArray();
	}
}
4.上传文件业务方法

/**
	 * 上传文件
	 * @param title
	 * @param length
	 * @param uploadFile
	 * @return
	 */
	public static boolean save(String title, String length, File uploadFile) {
		String path="http://192.168.1.107:8080/ManageServlet";//服务器路径
		Map<String, String> params=new HashMap<String, String>();
		params.put("title", title);
		params.put("timelength", length);
		FormFile formFile=new FormFile(uploadFile, "fileinput", "application/octet-stream");//文件类型可以采用数据字典进行匹配
		try {
			return SocketHttpRequester.post(path, params, formFile);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return false;
	}
5.activity调用示例

public void save(View v) {
		String title = titleText.getText().toString();
		String length = lengthText.getText().toString();
		String filename = fileNameText.getText().toString();
		// 判断SD卡是否存在
		if (Environment.getExternalStorageState().equals(
				Environment.MEDIA_MOUNTED)
				|| Environment.getExternalStorageState().equals(
						Environment.MEDIA_MOUNTED_READ_ONLY)) {
				File uploadFile=new File(Environment.getExternalStorageDirectory(),filename);
				if(uploadFile.exists()){
					boolean result = NewsService.save(title, length,uploadFile);
					if (result) {
						Toast.makeText(getApplicationContext(), R.string.success, 1).show();
					} else {
						Toast.makeText(getApplicationContext(), R.string.error, 1).show();
					}
				}else{
					Toast.makeText(getApplicationContext(), R.string.filenoexsit, 1).show();
				}
		}else{//如果SD卡不存在就执行普通保存数据
			boolean result = NewsService.save(title, length);
			if (result) {
				Toast.makeText(getApplicationContext(), R.string.success, 1).show();
			} else {
				Toast.makeText(getApplicationContext(), R.string.error, 1).show();
			}
		}
	
	}
android客户端提供三个文本输入框,测试的时候将文件放入SD卡,然后填写SD卡的目录即可,在真实的使用环境中需要提供让用户可以选择文件。

源码下载:android通过HTTP协议上传文件至远程服务器



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