从客户端，通过HttpClient发送二进制数据到服务器端

在实现第三方接口时，通过二进制数据通讯，可以更高效、更灵活、更稳定。

从客户端发起请求的代码如下所示。

  protected  static  byte [] remoteInvoke( byte []  data )  throws  SomeException {

            byte []  ret  =  null ;

          PostMethod  filePost  =  null ;

            try {

              String  targetURL  =  REMOTE_URL  +  sign  ;

                logger .debug(  "REMOTE_URL:" + targetURL  );

                filePost  =  new  PostMethod(  targetURL );

                //增加http 请求输入流

                filePost .setRequestEntity(  new  ByteArrayRequestEntity( data ,  "text/plain; charset=utf-8" ));

              HttpClient  client  =  new  HttpClient();

                 client .getHttpConnectionManager().getParams().setConnectionTimeout(5000);

                int  status  =  client .executeMethod(  filePost );

                if  (  status  == HttpStatus.  SC_OK ) {

                     // 响应回文数组

                     ret  =  filePost .getResponseBody();

              }  else {

                     logger .debug(  "请求出错，状态："  + status  + ","  + filePost  .getStatusText());

                     logger .debug(  "请求出错，响应："  + filePost  .getResponseBodyAsString());

                     throw  new  SomeException(  "请求远端数据失败，"  + filePost  .getStatusText());

              }

          }  catch (IOException  e ){

                throw  new  SomeException(  " 请求远端数据 失败，"  + e  .getMessage(), e  );

          }  finally {

                if (  filePost !=  null ){

                     filePost .releaseConnection();

              }

          }

            if (  logger .isDebugEnabled()){

                //logger.debug(String.format("请求：“%s”", SomeUtils.toString(data)));

                //logger.debug(String.format("响应：“%s”", SomeUtils.toString(ret)));

          }

            return  ret ;

     }

     

服务器获取二进制输入的代码如下所示。

       protected   static  String getRequestBody(HttpServletRequest  request  )

              throws  IOException, UnsupportedEncodingException {

     

          final   int   BUFFER_SIZE  = 8 * 1024;

          byte []  buffer  =  new   byte [  BUFFER_SIZE ];

         ServletInputStream  sis  =  request  .getInputStream();

          int   length  = 0;

         ByteArrayOutputStream  baos  =  new  ByteArrayOutputStream();

     

     

          int   length  = 0;  

          while ((  length  =   sis .read(  buffer ))>0){   

                 baos .write(  buffer , 0,  length );

         } 

     

         String  bodyData  =  new  String(  baos .toByteArray(),  "UTF-8"  );

          return   bodyData ;

     }