详解JAVA生成将图片存入数据库的sql语句实现方法

public class Image2Hex {   public static void main(String[] args) {     try{       //存放图片的文件夹       File list = new File("d:/qmx");       File[] lists = list.listFiles();       String name;       //生成的语句存放文件       PrintWriter pw = new PrintWriter(new FileWriter("d:/update.txt"),true);       FileInputStream fis = null;       byte[] b;       for(File file : lists){         //张三.jpg         name=file.getName();         fis = new FileInputStream(file);         b = new byte[fis.available()];         fis.read(b);         pw.println("update sys_userinfo set sign_image =0x" + byte2HexStr(b) + " where realName=/'" + name.substring(0,name.length() - 4) + "/'");          }       pw.flush();       pw.close();       }catch(Exception e){       e.printStackTrace();     }   }   /**    *    * 描述：byte转字符串    */   public static String byte2HexStr(byte[] b) {       StringBuffer hs = new StringBuffer();       String stmp="";       for (int n=0;n< b.length;n++) {         stmp=(Integer.toHexString(b[n] & 0XFF));       hs.append((stmp.length() == 1 ? "0" : "") + stmp);     }       return hs.toString().toUpperCase();     }   }