使用SpringBoot怎么样实现一个验证码生成功能-创新互联

这篇文章给大家介绍使用Spring Boot怎么样实现一个验证码生成功能，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。

1、验证码生成类

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.OutputStream;import java.util.HashMap;
import java.util.Map;import java.util.Random;

public class ImageCode {
 private static char mapTable[] = {
   '0', '1', '2', '3', '4', '5',
   '6', '7', '8', '9', '0', '1',
   '2', '3', '4', '5', '6', '7',
   '8', '9'};
 public static Map getImageCode(int width, int height, OutputStream os) {
  Map returnMap = new HashMap();
  if (width <= 0) width = 60;
  if (height <= 0) height = 20;
  BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
  // 获取图形上下文
  Graphics g = image.getGraphics();
  //生成随机类
  Random random = new Random();
  // 设定背景色
  g.setColor(getRandColor(200, 250));
  g.fillRect(0, 0, width, height);
  //设定字体
  g.setFont(new Font("Times New Roman", Font.PLAIN, 18));
  // 随机产生168条干扰线，使图象中的认证码不易被其它程序探测到
  g.setColor(getRandColor(160, 200));
  for (int i = 0; i < 168; i++) {
   int x = random.nextInt(width);
   int y = random.nextInt(height);
   int xl = random.nextInt(12);
   int yl = random.nextInt(12);
   g.drawLine(x, y, x + xl, y + yl);
  }
  //取随机产生的码
  String strEnsure = "";
  //4代表4位验证码,如果要生成更多位的认证码,则加大数值
  for (int i = 0; i < 4; ++i) {
   strEnsure += mapTable[(int) (mapTable.length * Math.random())];
   // 将认证码显示到图象中
   g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
   //直接生成
   String str = strEnsure.substring(i, i + 1);
   g.drawString(str, 13 * i + 6, 16);
  }
  // 释放图形上下文
  g.dispose();
  returnMap.put("image",image);
  returnMap.put("strEnsure",strEnsure);
  return returnMap;
 }
 //给定范围获得随机颜色
 static Color getRandColor(int fc, int bc) {
  Random random = new Random();
  if (fc > 255) fc = 255;
  if (bc > 255) bc = 255;
  int r = fc + random.nextInt(bc - fc);
  int g = fc + random.nextInt(bc - fc);
  int b = fc + random.nextInt(bc - fc);
  return new Color(r, g, b);
 }
}