科技速递|SpringBoot-登录验证码实现( 二 ) 嗯

< charArray.length; i++) {//设置RGB颜色算法参数g.setColor(new Color(50 + RandomUtils.nextInt(100),50 + RandomUtils.nextInt(100), 50 + RandomUtils.nextInt(100)));//设置字体大小，类型g.setFont(new Font(FONT_TYPES[RandomUtils.nextInt(FONT_TYPES.length)], Font.BOLD, 26));//设置x y 坐标g.drawString(String.valueOf(charArray[i]), 15 * i + 5, 19 + RandomUtils.nextInt(8));}}}

4.工具类

 package com.youyou.util;import java.awt.*;import java.util.Random;public class RandomUtils extends org.apache.commons.lang3.RandomUtils {private static final char[] CODE_SEQ = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J','K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W','X', 'Y', 'Z', '2', '3', '4', '5', '6', '7', '8', '9' };private static final char[] NUMBER_ARRAY = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };private static Random random = new Random();public static String randomString(int length) {StringBuilder sb = new StringBuilder();for (int i = 0; i < length; i++) {sb.append(String.valueOf(CODE_SEQ[random.nextInt(CODE_SEQ.length)]));}return sb.toString();}public static String randomNumberString(int length) {StringBuilder sb = new StringBuilder();for (int i = 0; i < length; i++) {sb.append(String.valueOf(NUMBER_ARRAY[random.nextInt(NUMBER_ARRAY.length)]));}return sb.toString();}public static Color randomColor(int fc, int bc) {int f = fc;int b = bc;Random random = new Random();if (f > 255) {f = 255;}if (b > 255) {b = 255;}return new Color(f + random.nextInt(b - f), f + random.nextInt(b - f), f + random.nextInt(b - f));}public static int nextInt(int bound) {return random.nextInt(bound);}}

经过以上代码，我们的验证码生成功能基本上已经实现了，现在还需要一个controller来调用它。

@ApiOperation(value = "http://kandian.youth.cn/index/验证码")@GetMapping("/verifyCode")public void verifyCode(HttpServletRequest request, HttpServletResponse response) {IVerifyCodeGen iVerifyCodeGen = new SimpleCharVerifyCodeGenImpl();try {//设置长宽VerifyCode verifyCode = iVerifyCodeGen.generate(80, 28);String code = verifyCode.getCode();LOGGER.info(code);//将VerifyCode绑定sessionrequest.getSession().setAttribute("VerifyCode", code);//设置响应头response.setHeader("Pragma", "no-cache");//设置响应头response.setHeader("Cache-Control", "no-cache");//在代理服务器端防止缓冲response.setDateHeader("Expires", 0);//设置响应内容类型response.setContentType("image/jpeg");response.getOutputStream().write(verifyCode.getImgBytes());response.getOutputStream().flush();} catch (IOException e) {LOGGER.info("", e);}}

搞定！后台编写到此结束了。那么又会有博友说了：“说好的实现效果呢？”