我要评论展示样式：
接口根据UUID判断验证码是否正确。
图形验证码Utils：
/**
* 图形验证码Utils
*/
@Component
public class ValidateCode {
private static final Logger logger = LoggerFactory.getLogger(ValidateCode.class);
ResultObject resultObject = new ResultObject();
// 图片的宽度。
private int width = 160;
// 图片的高度。
private int height = 40;
// 验证码字符个数
private int codeCount = 4;
// 验证码干扰线数
private int lineCount = 150;
// 验证码
private String code = null;
//绑定验证码的uuid
private String uuid = null;
// 验证码图片Buffer
private BufferedImage buffImg = null;
//Base64图片前缀
private static final String DATA = "data:image/jpg;base64,";
// 验证码范围,去掉0(数字)和O(拼音)容易混淆的(小写的1和L也可以去掉,大写不用了)
private char[] codeSequence = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
'X', 'Y', 'Z', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
/**
* @param width 图片宽
* @param height 图片高
*/
public ValidateCode(int width, int height) {
this.width = width;
this.height = height;
this.createCode();
}
public ValidateCode() {
this.width = width;
}
/**
* @param width 图片宽
* @param height 图片高
* @param codeCount 字符个数
* @param lineCount 干扰线条数
*/
public ValidateCode(int width, int height, int codeCount, int lineCount) {
this.width = width;
this.height = height;
this.codeCount = codeCount;
this.lineCount = lineCount;
this.code = this.createCode();
}
public String createCode() {
int x = 0, fontHeight = 0, codeY = 0;
int red = 0, green = 0, blue = 0;
x = width / (codeCount + 2);//每个字符的宽度(左右各空出一个字符)
fontHeight = height - 2;//字体的高度
codeY = height - 4;
// 图像buffer
buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = buffImg.createGraphics();
// 生成随机数
Random random = new Random();
// 将图像填充为白色
g.setColor(Color.WHITE);
g.fillRect(0, 0, width, height);
// 创建字体,可以修改为其它的
Font font = new Font("Fixedsys", Font.PLAIN, fontHeight);
g.setFont(font);
for (int i = 0; i < lineCount; i++) {
// 设置随机开始和结束坐标
int xs = random.nextInt(width);//x坐标开始
int ys = random.nextInt(height);//y坐标开始
int xe = xs + random.nextInt(width / 8);//x坐标结束
int ye = ys + random.nextInt(height / 8);//y坐标结束
// 产生随机的颜色值，让输出的每个干扰线的颜色值都将不同。
red = random.nextInt(255);
green = random.nextInt(255);
blue = random.nextInt(255);
g.setColor(new Color(red, green, blue));
g.drawLine(xs, ys, xe, ye);
}
// randomCode记录随机产生的验证码
StringBuffer randomCode = new StringBuffer();
// 随机产生codeCount个字符的验证码。
for (int i = 0; i < codeCount; i++) {
String strRand = String.valueOf(codeSequence[random.nextInt(codeSequence.length)]);
// 产生随机的颜色值，让输出的每个字符的颜色值都将不同。
red = random.nextInt(255);
green = random.nextInt(255);
blue = random.nextInt(255);
g.setColor(new Color(red, green, blue));
g.drawString(strRand, (i + 1) * x, codeY);
// 将产生的四个随机数组合在一起。
randomCode.append(strRand);
}
//将生成的验证码放入到redis中
code = randomCode.toString();
return code;
}
public void write(String path) throws IOException {
OutputStream sos = new FileOutputStream(path);
this.write(sos);
}
public void write(OutputStream sos) throws IOException {
ImageIO.write(buffImg, "png", sos);
sos.close();
}
public BufferedImage getBuffImg() {
return buffImg;
}
public String getCode() {
return code;
}
/**
* 图片转Base64
*
* @param bufferedImage
* @param png
* @return
* @throws IOException
*/
public String imageToBytes(BufferedImage bufferedImage, String png) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();//io流
ImageIO.write(bufferedImage, png, baos);//写入流中
byte[] bytes = baos.toByteArray();//转换成字节
BASE64Encoder encoder = new BASE64Encoder();
String png_base64 = encoder.encodeBuffer(bytes).trim();//转换成base64串
png_base64 = png_base64.replaceAll("\n", "").replaceAll("\r", "");//删除 \r\n
String path = DATA + png_base64;
logger.info("验证码Base64:{}", path);
return path;
}
public ResultObject create() throws IOException {
ValidateCode vCode = new ValidateCode(120, 40, 4, 100);
String imageBase64 = imageToBytes(vCode.getBuffImg(), "png");
resultObject.put("image", imageBase64);
resultObject.put("VerificationCode", vCode.getCode());
return resultObject;
}
}
Controller：
/**
* 响应验证码页面
*
* @return
*/
@ResponseBody
@GetMapping(value = "/view")
public ResultObject validateCode() {
ResultObject resultObject = new ResultObject();
try {
ValidateCode validateCode = new ValidateCode();
resultObject = validateCode.create();
String uuid = UUID.randomUUID().toString().replaceAll("-", "");
resultObject.put("uuid", uuid);
String VerificationCode = String.valueOf(resultObject.get("VerificationCode"));
logger.info("验证码：{}，uuid：{}", VerificationCode, uuid);
// 获取验证码和uuid之后，存储redis
redisBaseDao.set(uuid, VerificationCode);
redisBaseDao.expire(uuid, 60 * 30);
resultObject.remove("VerificationCode");
return resultObject;
} catch (Exception e) {
resultObject.setCode(Constant.CODE_EXCEPTION);
resultObject.setMessage("系统异常");
logger.error(e.getMessage(), e);
}
return resultObject;
}
本文地址：https://blog.csdn.net/xianyun1992/article/details/107687841
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