content: package com.clothrent.common;
  
  import java.awt.*;
  import java.awt.image.BufferedImage;
  import java.util.Random;
  
  public class VerifyUtil {
      // 验证码字符集
      private static final char[] chars = {
               '1', '2', '3', '4', '5', '6', '7', '8', '9',
              'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'm', 'n',
              'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
              'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'M', 'N',
              'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};
      // 字符数量
      private static final int SIZE = 4;
      // 干扰线数量
      private static final int LINES = 5;
      // 宽度
      private static final int WIDTH = 120;
      // 高度
      private static final int HEIGHT = 38;
      // 字体大小
      private static final int FONT_SIZE = 30;
  
      /**
       * @descript: 生成随机验证码及图片
       *      Object[0]：验证码字符串；
       *      Object[1]：验证码图片。
       * @param:
       * @return: java.lang.Object[]
       */
      public static Object[] createImage() {
          StringBuffer sb = new StringBuffer();
          // 1.创建空白图片
          BufferedImage image = new BufferedImage(
                  WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
          // 2.获取图片画笔
          Graphics graphic = image.getGraphics();
          // 3.设置画笔颜色
          graphic.setColor(Color.LIGHT_GRAY);
          // 4.绘制矩形背景
          graphic.fillRect(0, 0, WIDTH, HEIGHT);
          // 5.画随机字符
          Random ran = new Random();
          for (int i = 0; i <SIZE; i++) {
              // 取随机字符索引
              int n = ran.nextInt(chars.length);
              // 设置随机颜色
              graphic.setColor(getRandomColor());
              // 设置字体大小
              graphic.setFont(new Font(
                      null, Font.BOLD + Font.ITALIC, FONT_SIZE));
              // 画字符
              graphic.drawString(
                      chars[n] + "", i * WIDTH / SIZE, HEIGHT*2/3);
              // 记录字符
              sb.append(chars[n]);
          }
          // 6.画干扰线
          for (int i = 0; i < LINES; i++) {
              // 设置随机颜色
              graphic.setColor(getRandomColor());
              // 随机画线
              graphic.drawLine(ran.nextInt(WIDTH), ran.nextInt(HEIGHT),
                      ran.nextInt(WIDTH), ran.nextInt(HEIGHT));
          }
          // 7.返回验证码和图片
          return new Object[]{sb.toString(), image};
      }
  
      /**
       * @descript: 生成随机取色
       * @param:
       * @return: java.awt.Color
       */
      public static Color getRandomColor() {
          Random ran = new Random();
          Color color = new Color(ran.nextInt(256),
                  ran.nextInt(256), ran.nextInt(256));
          return color;
      }
  }
  