139 lines
3.1 KiB
Java
139 lines
3.1 KiB
Java
package com.wf.captcha;
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import java.awt.Color;
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import java.awt.Font;
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import java.io.OutputStream;
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/**
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* 验证码抽象类
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* Created by 王帆 on 2018-07-27 上午 10:08.
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*/
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public abstract class Captcha extends Randoms {
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protected Font font = new Font("Verdana", Font.PLAIN, 32); // 字体
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protected int len = 5; // 验证码随机字符长度
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protected int width = 130; // 验证码显示宽度
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protected int height = 48; // 验证码显示高度
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protected String chars = null; // 当前验证码
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protected int charType = TYPE_DEFAULT; // 验证码类型，1字母数字混合，2纯数字，3纯字母
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public static final int TYPE_DEFAULT = 1; // 字母数字混合
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public static final int TYPE_ONLY_NUMBER = 2; // 纯数字
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public static final int TYPE_ONLY_CHAR = 3; // 纯字母
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/**
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* 生成随机验证码
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*
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* @return 验证码字符数组
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*/
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protected char[] alphas() {
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char[] cs = new char[len];
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for (int i = 0; i < len; i++) {
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switch (charType) {
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case 2:
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cs[i] = alpha(numMaxIndex);
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break;
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case 3:
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cs[i] = alpha(charMinIndex, charMaxIndex);
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break;
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default:
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cs[i] = alpha();
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}
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}
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chars = new String(cs);
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return cs;
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}
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/**
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* 给定范围获得随机颜色
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*
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* @param fc 0-255
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* @param bc 0-255
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* @return 随机颜色
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*/
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protected Color color(int fc, int bc) {
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if (fc > 255)
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fc = 255;
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if (bc > 255)
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bc = 255;
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int r = fc + num(bc - fc);
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int g = fc + num(bc - fc);
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int b = fc + num(bc - fc);
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return new Color(r, g, b);
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}
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/**
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* 验证码输出,抽象方法，由子类实现
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*
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* @param os 输出流
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* @return 是否成功
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*/
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public abstract boolean out(OutputStream os);
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/**
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* 获取当前的验证码
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*
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* @return 字符串
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*/
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public String text() {
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checkAlpha();
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return chars;
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}
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/**
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* 获取当前验证码的字符数组
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*
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* @return 字符数组
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*/
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public char[] textChar() {
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checkAlpha();
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return chars.toCharArray();
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}
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/**
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* 检查验证码是否生成，没有这立即生成
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*/
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public void checkAlpha() {
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if (chars == null) {
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alphas(); // 生成验证码
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}
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}
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public Font getFont() {
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return font;
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}
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public void setFont(Font font) {
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this.font = font;
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}
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public int getLen() {
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return len;
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}
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public void setLen(int len) {
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this.len = len;
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}
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public int getWidth() {
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return width;
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}
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public void setWidth(int width) {
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this.width = width;
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}
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public int getHeight() {
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return height;
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}
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public void setHeight(int height) {
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this.height = height;
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}
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public int getCharType() {
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return charType;
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}
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public void setCharType(int charType) {
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this.charType = charType;
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}
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} |