学步园

 http协议上传文件一般最大为2M，比较适合上传小文件。

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;  
}  
  
}  

/** 
 * 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});  
}