生成验证码的java类
发布时间:2020-12-15 00:12:33 所属栏目:Java 来源:网络整理
导读:今天PHP站长网 52php.cn把收集自互联网的代码分享给大家,仅供参考。 import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.util.HashMap;import java
以下代码由PHP站长网 52php.cn收集自互联网 现在PHP站长网小编把它分享给大家,仅供参考 import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import java.awt.image.BufferedImage; import java.util.HashMap; import java.util.Map; import java.util.Random; //验证码 public final class ImageUtil { private static final String[] chars = { "0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F","G","H","J","K","L","M","N","P" }; private static final int SIZE = 5;// 字符长度 private static final int LINES = 7;// 干扰线 private static final int WIDTH = 100; private static final int HEIGHT = 50; private static final int FONT_SIZE = 30;// 字体大小 public static Map<String,BufferedImage> createImage() { StringBuffer sb = new StringBuffer(); BufferedImage image = new BufferedImage(WIDTH,HEIGHT,BufferedImage.TYPE_INT_RGB); Graphics graphic = image.getGraphics(); graphic.setColor(Color.LIGHT_GRAY); graphic.fillRect(0,WIDTH,HEIGHT); Random ran = new Random(); // 画随机字符 for (int i = 1; i <= SIZE; i++) { int r = ran.nextInt(chars.length); graphic.setColor(getRandomColor()); graphic.setFont(new Font(null,Font.BOLD + Font.ITALIC,FONT_SIZE)); graphic.drawString(chars[r],(i - 1) * WIDTH / SIZE,HEIGHT / 2); sb.append(chars[r]);// 将字符保存,存入Session } // 画干扰线 for (int i = 1; i <= LINES; i++) { graphic.setColor(getRandomColor()); graphic.drawLine(ran.nextInt(WIDTH),ran.nextInt(HEIGHT),ran.nextInt(WIDTH),ran.nextInt(HEIGHT)); } Map<String,BufferedImage> map = new HashMap<String,BufferedImage>(); map.put(sb.toString(),image); return map; } public static Color getRandomColor() { Random ran = new Random(); Color color = new Color(ran.nextInt(156),ran.nextInt(156),ran.nextInt(156)); return color; } } 以上内容由PHP站长网【52php.cn】收集整理供大家参考研究 如果以上内容对您有帮助,欢迎收藏、点赞、推荐、分享。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |