if(meta.getColumnClassName(i).contains("[B")){

                    	 InputStream in = rs.getBinaryStream(i);

                         ByteArrayOutputStream outStream = new ByteArrayOutputStream();

                         byte[] data = new byte[4096];

                         int count = -1;

                         while((count = in.read(data,0,4096)) != -1)

                             outStream.write(data, 0, count);

                         data = null;

                         value = new String(outStream.toByteArray(),"gbk");

                    	 Method method=obj.getClass().getMethod(methodName, Class.forName("java.lang.String"));

                         method.invoke(obj, value); 

                         in.close();

                         outStream.close();

                    }else{

                    	Method method=obj.getClass().getMethod(methodName, Class.forName(meta.getColumnClassName(i)));

                        method.invoke(obj, value);

                    }

Blob读取出来的类型是[B，java中没有这个类型，用反射时需要自己转换来读取。