android使用http协议实现文件的上传

http协议上传文件一般最大是2M，比较适合上传小于两M的文件

下面是封装的一个文件类：

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

/**
 * 上传的文件
 */
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";
	/**
	 * 
	 * @param filname 文件名称
	 * @param data 上传的文件数据
	 * @param parameterName 参数
	 * @param contentType 内容类型
	 */
	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;
	}
	/**
	 * 
	 * @param filname 文件名
	 * @param file 上传的文件
	 * @param parameterName 参数
	 * @param contentType 内容内容类型
	 */
	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;
	}
	
}

下面的方法封装的http协议上传数据：

/**
	 * 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://192.168.0.200:8080/ssi/fileload/test.do" 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.xxx.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[] 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.xxx.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});
	}