public class HttpPlugin{
 private static Log log = LogFactory.getLog(HttpPlugin.class);
 @Override
 public void init() {
  
 }
 

 public void sendGet(String url , Parameter param)
 {
  StringBuffer p=new StringBuffer();
  boolean first=true;
  for(Map.Entry<String, String> pair : param.parameters.entrySet()){
   if(first) first=false;
   else p.append('&');
   p.append(pair.getKey());
   p.append('=');
   p.append(pair.getValue());
  }
  try
  {
   String urlName = url + "?" + p.toString();
   URL realUrl = new URL(urlName);
   URLConnection conn = realUrl.openConnection();

   conn.connect();
   //獲取所有響應頭欄位
   Map<String,List<String>> map = conn.getHeaderFields();
   for (String key : map.keySet())
   {
   System.out.println(key + "--->" + map.get(key));
   }
   
   Scanner scanner=new Scanner(conn.getInputStream(),"gb2312");//以gb2312格式接收，避免中文亂碼
   StringBuffer str=new StringBuffer();
   while(scanner.hasNextLine()) {
           str.append(scanner.nextLine());
           str.append("/n");
   }
   
   System.out.println(str.toString());
   
  }catch(Exception e){
   log.error(e.getMessage());
  }
 }
 

 public void sendPost(String url,Parameter param)
 {
  PrintWriter out = null;
  String result = "";
  try{
   URL realUrl = new URL(url);
   URLConnection conn = realUrl.openConnection();
   //傳送POST請求設定
   conn.setDoOutput(true);
   conn.setDoInput(true);

   out = new PrintWriter(conn.getOutputStream());
   
   boolean first=true;
   for(Map.Entry<String, String> pair : param.parameters.entrySet()){
    if(first) first=false;
    else out.print('&');
    out.print(pair.getKey());
    out.print('=');
    out.print(pair.getValue());
   }
   out.flush();
   
   Scanner scanner=new Scanner(conn.getInputStream(),"gb2312");//以gb2312格式接收
   StringBuffer str=new StringBuffer();
   while(scanner.hasNextLine()) {
           str.append(scanner.nextLine());
           str.append("/n");
   }
   
   System.out.println(str.toString());
   
   if (out != null){
    out.close();
   }
  }catch(Exception e){
   log.error(e.getMessage());
  }
  System.out.println(result);
 }
 
 public boolean getBinaryFile(String url){
  try{
   URL u = new URL(url);
   URLConnection uc = u.openConnection();
   String contentType = uc.getContentType();
   int contentLength = uc.getContentLength();
 
   if (contentType.startsWith("text/") || (contentLength == -1))
   {
    log.error("getBinaryFile-->not a binary file");
    return false;
   }
 
   InputStream raw = uc.getInputStream();
   InputStream in = new BufferedInputStream(raw);
   byte[] data = new byte[contentLength];
   int bytesRead = 0;
   int offset = 0;
   while (offset < contentLength)
   {
    bytesRead = in.read(data,offset,data.length-offset);
    if(bytesRead == -1) break;
    offset +=bytesRead;
   }
   in.close();
 
   if (offset != contentLength)
   {
    log.error("getBinaryFile-->Only read "+offset+" bytes;Expected "+contentLength+" bytes.");
    return false;
   }
 
   String fileName = u.getFile();
   String filePath = "D://";
   fileName = fileName.substring(fileName.lastIndexOf('/')+1);
   FileOutputStream fout = new FileOutputStream(filePath+fileName);
   fout.write(data);
   fout.flush();
   fout.close();
  }catch(Exception e){
   log.error(e.getMessage());
   return false;
  }
  return true;
 }
 
 
 public Parameter getParameter(){
  return new Parameter();
 }
 
 
 public class Parameter{
  private Map<String,String> parameters=new HashMap<String,String>();
  private Parameter(){
   parameters=new HashMap<String,String>();
  }
  public boolean addParam(String name,String value){
   if(parameters!=null){
    parameters.put(name, value);
    return true;
   }else{
    return false;
   }
  }
  public boolean delParam(String name){
   if(parameters!=null){
    if(parameters.remove(name)==null){
     return false;
    }else{
     return true;
    }
   }else{
    return false;
   }
  }
 }

}