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- package com.iamberry.app.api.util;
- import java.awt.Color;
- import java.awt.Font;
- import java.awt.Graphics;
- import java.awt.image.BufferedImage;
- import java.util.Random;
- import com.iamberry.wechat.tools.NameUtils;
-
- /**
- * 验证码生成器
- * @company 深圳爱贝源科技有限公司
- * @website www.iamberry.com
- * @author 献
- * @tel 18271840547
- * @date 2016年12月13日
- */
- public class VerifyCodeUtil {
- private VerifyCodeUtil(){}
-
- /**
- * 生成随机颜色
- */
- private static Color generateRandomColor() {
- Random random = new Random();
- return new Color(random.nextInt(255), random.nextInt(255), random.nextInt(255));
- }
- /**
- * 生成图片验证码
- * @param type 验证码类型,参见本类的静态属性
- * @param length 验证码字符长度,要求大于0的整数
- * @param excludeString 需排除的特殊字符
- * @param width 图片宽度(注意此宽度若过小,容易造成验证码文本显示不全,如4个字符的文本可使用85到90的宽度)
- * @param height 图片高度
- * @param interLine 图片中干扰线的条数
- * @param randomLocation 每个字符的高低位置是否随机
- * @param backColor 图片颜色,若为null则表示采用随机颜色
- * @param foreColor 字体颜色,若为null则表示采用随机颜色
- * @param lineColor 干扰线颜色,若为null则表示采用随机颜色
- * @return 图片缓存对象
- */
- public static BufferedImage generateImageCode(int type, int length, String excludeString, int width, int height, int interLine, boolean randomLocation, Color backColor, Color foreColor, Color lineColor){
- String textCode = generateTextCode(type, length, excludeString);
- return generateImageCode(textCode, width, height, interLine, randomLocation, backColor, foreColor, lineColor);
- }
- /**
- * 生成验证码字符串
- * @param type 验证码类型,参见本类的静态属性
- * @param length 验证码长度,要求大于0的整数
- * @param excludeString 需排除的特殊字符(无需排除则为null)
- * @return 验证码字符串
- */
- public static String generateTextCode(int type, int length, String excludeString){
- if(length <= 0){
- return "";
- }
- StringBuffer verifyCode = new StringBuffer();
- int i = 0;
- Random random = new Random();
- switch(type){
- case NameUtils.TYPE_NUM_ONLY:
- while(i < length){
- int t = random.nextInt(10);
- //排除特殊字符
- if(null==excludeString || excludeString.indexOf(t+"")<0) {
- verifyCode.append(t);
- i++;
- }
- }
- break;
- case NameUtils.TYPE_LETTER_ONLY:
- while(i < length){
- int t = random.nextInt(123);
- if((t>=97 || (t>=65&&t<=90)) && (null==excludeString||excludeString.indexOf((char)t)<0)){
- verifyCode.append((char)t);
- i++;
- }
- }
- break;
- case NameUtils.TYPE_ALL_MIXED:
- while(i < length){
- int t = random.nextInt(123);
- if((t>=97 || (t>=65&&t<=90) || (t>=48&&t<=57)) && (null==excludeString||excludeString.indexOf((char)t)<0)){
- verifyCode.append((char)t);
- i++;
- }
- }
- break;
- case NameUtils.TYPE_NUM_UPPER:
- while(i < length){
- int t = random.nextInt(91);
- if((t>=65 || (t>=48&&t<=57)) && (null==excludeString || excludeString.indexOf((char)t)<0)){
- verifyCode.append((char)t);
- i++;
- }
- }
- break;
- case NameUtils.TYPE_NUM_LOWER:
- while(i < length){
- int t = random.nextInt(123);
- if((t>=97 || (t>=48&&t<=57)) && (null==excludeString || excludeString.indexOf((char)t)<0)){
- verifyCode.append((char)t);
- i++;
- }
- }
- break;
- case NameUtils.TYPE_UPPER_ONLY:
- while(i < length){
- int t = random.nextInt(91);
- if((t >= 65) && (null==excludeString||excludeString.indexOf((char)t)<0)){
- verifyCode.append((char)t);
- i++;
- }
- }
- break;
- case NameUtils.TYPE_LOWER_ONLY:
- while(i < length){
- int t = random.nextInt(123);
- if((t>=97) && (null==excludeString||excludeString.indexOf((char)t)<0)){
- verifyCode.append((char)t);
- i++;
- }
- }
- break;
- }
- return verifyCode.toString();
- }
-
- /**
- * 已有验证码,生成验证码图片
- * @param textCode 文本验证码
- * @param width 图片宽度(注意此宽度若过小,容易造成验证码文本显示不全,如4个字符的文本可使用85到90的宽度)
- * @param height 图片高度
- * @param interLine 图片中干扰线的条数
- * @param randomLocation 每个字符的高低位置是否随机
- * @param backColor 图片颜色,若为null则表示采用随机颜色
- * @param foreColor 字体颜色,若为null则表示采用随机颜色
- * @param lineColor 干扰线颜色,若为null则表示采用随机颜色
- * @return 图片缓存对象
- */
- public static BufferedImage generateImageCode(String textCode, int width, int height, int interLine, boolean randomLocation, Color backColor, Color foreColor, Color lineColor){
- //创建内存图像
- BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
- //获取图形上下文
- Graphics graphics = bufferedImage.getGraphics();
- //画背景图
- graphics.setColor(null==backColor ? generateRandomColor() : backColor);
- graphics.fillRect(0, 0, width, height);
- //画干扰线
- Random random = new Random();
- if(interLine > 0){
- int x = 0, y = 0, x1 = width, y1 = 0;
- for(int i=0; i<interLine; i++){
- graphics.setColor(null==lineColor ? generateRandomColor() : lineColor);
- y = random.nextInt(height);
- y1 = random.nextInt(height);
- graphics.drawLine(x, y, x1, y1);
- }
- }
- //字体大小为图片高度的80%
- int fsize = (int)(height * 0.8);
- int fx = height - fsize;
- int fy = fsize;
- //设定字体
- graphics.setFont(new Font("Default", Font.PLAIN, fsize));
- //写验证码字符
- for(int i=0; i<textCode.length(); i++){
- fy = randomLocation ? (int)((Math.random()*0.3+0.6)*height) : fy;
- graphics.setColor(null==foreColor ? generateRandomColor() : foreColor);
- //将验证码字符显示到图象中
- graphics.drawString(textCode.charAt(i)+"", fx, fy);
- fx += fsize * 0.9;
- }
- graphics.dispose();
- return bufferedImage;
- }
- }
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