Python 生成随机中文验证码详解编程语言

# -*- coding: utf-8 -*- 
import Image,ImageDraw,ImageFont 
import random 
import math, string   
 
class RandomChar(): 
  """用于随机生成汉字""" 
  @staticmethod 
  def Unicode(): 
    val = random.randint(0x4E00, 0x9FBF) 
    return unichr(val)   
 
  @staticmethod 
  def GB2312(): 
    head = random.randint(0xB0, 0xCF) 
    body = random.randint(0xA, 0xF) 
    tail = random.randint(0, 0xF) 
    val = ( head << 8 ) | (body << 4) | tail 
    str = "%x" % val 
    return str.decode('hex').decode('gb2312')   
 
class ImageChar(): 
  def __init__(self, fontColor = (0, 0, 0), 
                     size = (100, 40), 
                     fontPath = 'wqy.ttc', 
                     bgColor = (255, 255, 255), 
                     fontSize = 20): 
    self.size = size 
    self.fontPath = fontPath 
    self.bgColor = bgColor 
    self.fontSize = fontSize 
    self.fontColor = fontColor 
    self.font = ImageFont.truetype(self.fontPath, self.fontSize) 
    self.image = Image.new('RGB', size, bgColor)   
 
  def rotate(self): 
    self.image.rotate(random.randint(0, 30), expand=0)   
 
  def drawText(self, pos, txt, fill): 
    draw = ImageDraw.Draw(self.image) 
    draw.text(pos, txt, font=self.font, fill=fill) 
    del draw   
 
  def randRGB(self): 
    return (random.randint(0, 255), 
           random.randint(0, 255), 
           random.randint(0, 255))   
 
  def randPoint(self): 
    (width, height) = self.size 
    return (random.randint(0, width), random.randint(0, height))   
 
  def randLine(self, num): 
    draw = ImageDraw.Draw(self.image) 
    for i in range(0, num): 
      draw.line([self.randPoint(), self.randPoint()], self.randRGB()) 
    del draw   
 
  def randChinese(self, num): 
    gap = 5 
    start = 0 
    for i in range(0, num): 
      char = RandomChar().GB2312() 
      x = start + self.fontSize * i + random.randint(0, gap) + gap * i 
      self.drawText((x, random.randint(-5, 5)), RandomChar().GB2312(), self.randRGB()) 
      self.rotate() 
    self.randLine(18)   
 
  def save(self, path): 
    self.image.save(path)