217 lines
5.5 KiB
Java
217 lines
5.5 KiB
Java
package com.wf.captcha;
|
||
|
||
import java.awt.*;
|
||
import java.io.OutputStream;
|
||
|
||
/**
|
||
* 验证码抽象类
|
||
* Created by 王帆 on 2018-07-27 上午 10:08.
|
||
*/
|
||
public abstract class Captcha extends Randoms {
|
||
protected Font font = new Font("Arial", Font.BOLD, 32); // 字体Verdana
|
||
protected int len = 4; // 验证码随机字符长度
|
||
protected int width = 130; // 验证码显示宽度
|
||
protected int height = 48; // 验证码显示高度
|
||
protected String chars = null; // 当前验证码
|
||
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
|
||
public static final int TYPE_DEFAULT = 1; // 字母数字混合
|
||
public static final int TYPE_ONLY_NUMBER = 2; // 纯数字
|
||
public static final int TYPE_ONLY_CHAR = 3; // 纯字母
|
||
public static final int TYPE_ONLY_UPPER = 4; // 纯大写字母
|
||
public static final int TYPE_ONLY_LOWER = 5; // 纯小写字母
|
||
public static final int TYPE_NUM_AND_UPPER = 6; // 数字大写字母
|
||
// 常用颜色
|
||
public static final int[][] COLOR = {{0, 135, 255}, {51, 153, 51}, {255, 102, 102}, {255, 153, 0}, {153, 102, 0}, {153, 102, 153}, {51, 153, 153}, {102, 102, 255}, {0, 102, 204}, {204, 51, 51}, {0, 153, 204}, {0, 51, 102}};
|
||
|
||
/**
|
||
* 生成随机验证码
|
||
*
|
||
* @return 验证码字符数组
|
||
*/
|
||
protected char[] alphas() {
|
||
char[] cs = new char[len];
|
||
for (int i = 0; i < len; i++) {
|
||
switch (charType) {
|
||
case 2:
|
||
cs[i] = alpha(numMaxIndex);
|
||
break;
|
||
case 3:
|
||
cs[i] = alpha(charMinIndex, charMaxIndex);
|
||
break;
|
||
case 4:
|
||
cs[i] = alpha(upperMinIndex, upperMaxIndex);
|
||
break;
|
||
case 5:
|
||
cs[i] = alpha(lowerMinIndex, lowerMaxIndex);
|
||
break;
|
||
case 6:
|
||
cs[i] = alpha(upperMaxIndex);
|
||
break;
|
||
default:
|
||
cs[i] = alpha();
|
||
}
|
||
}
|
||
chars = new String(cs);
|
||
return cs;
|
||
}
|
||
|
||
/**
|
||
* 给定范围获得随机颜色
|
||
*
|
||
* @param fc 0-255
|
||
* @param bc 0-255
|
||
* @return 随机颜色
|
||
*/
|
||
protected Color color(int fc, int bc) {
|
||
if (fc > 255)
|
||
fc = 255;
|
||
if (bc > 255)
|
||
bc = 255;
|
||
int r = fc + num(bc - fc);
|
||
int g = fc + num(bc - fc);
|
||
int b = fc + num(bc - fc);
|
||
return new Color(r, g, b);
|
||
}
|
||
|
||
/**
|
||
* 获取随机常用颜色
|
||
*
|
||
* @return 随机颜色
|
||
*/
|
||
protected Color color() {
|
||
int[] color = COLOR[num(COLOR.length)];
|
||
return new Color(color[0], color[1], color[2]);
|
||
}
|
||
|
||
/**
|
||
* 验证码输出,抽象方法,由子类实现
|
||
*
|
||
* @param os 输出流
|
||
* @return 是否成功
|
||
*/
|
||
public abstract boolean out(OutputStream os);
|
||
|
||
/**
|
||
* 获取当前的验证码
|
||
*
|
||
* @return 字符串
|
||
*/
|
||
public String text() {
|
||
checkAlpha();
|
||
return chars;
|
||
}
|
||
|
||
/**
|
||
* 获取当前验证码的字符数组
|
||
*
|
||
* @return 字符数组
|
||
*/
|
||
public char[] textChar() {
|
||
checkAlpha();
|
||
return chars.toCharArray();
|
||
}
|
||
|
||
/**
|
||
* 检查验证码是否生成,没有这立即生成
|
||
*/
|
||
public void checkAlpha() {
|
||
if (chars == null) {
|
||
alphas(); // 生成验证码
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 随机画干扰线
|
||
*
|
||
* @param num 数量
|
||
* @param g Graphics2D
|
||
*/
|
||
public void drawLine(int num, Graphics2D g) {
|
||
drawLine(num, null, g);
|
||
}
|
||
|
||
/**
|
||
* 随机画干扰线
|
||
*
|
||
* @param num 数量
|
||
* @param color 颜色
|
||
* @param g Graphics2D
|
||
*/
|
||
public void drawLine(int num, Color color, Graphics2D g) {
|
||
for (int i = 0; i < num; i++) {
|
||
g.setColor(color == null ? color(150, 250) : color);
|
||
int x1 = num(-10, width - 10);
|
||
int y1 = num(5, height - 5);
|
||
int x2 = num(10, width + 10);
|
||
int y2 = num(2, height - 2);
|
||
g.drawLine(x1, y1, x2, y2);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 随机画干扰圆
|
||
*
|
||
* @param num 数量
|
||
* @param g Graphics2D
|
||
*/
|
||
public void drawOval(int num, Graphics2D g) {
|
||
for (int i = 0; i < num; i++) {
|
||
g.setColor(color(100, 250));
|
||
g.drawOval(num(width), num(height), 10 + num(20), 10 + num(20));
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 随机画干扰圆
|
||
*
|
||
* @param num 数量
|
||
* @param color 颜色
|
||
* @param g Graphics2D
|
||
*/
|
||
public void drawOval(int num, Color color, Graphics2D g) {
|
||
for (int i = 0; i < num; i++) {
|
||
g.setColor(color == null ? color(100, 250) : color);
|
||
g.drawOval(num(width), num(height), 10 + num(20), 10 + num(20));
|
||
}
|
||
}
|
||
|
||
public Font getFont() {
|
||
return font;
|
||
}
|
||
|
||
public void setFont(Font font) {
|
||
this.font = font;
|
||
}
|
||
|
||
public int getLen() {
|
||
return len;
|
||
}
|
||
|
||
public void setLen(int len) {
|
||
this.len = len;
|
||
}
|
||
|
||
public int getWidth() {
|
||
return width;
|
||
}
|
||
|
||
public void setWidth(int width) {
|
||
this.width = width;
|
||
}
|
||
|
||
public int getHeight() {
|
||
return height;
|
||
}
|
||
|
||
public void setHeight(int height) {
|
||
this.height = height;
|
||
}
|
||
|
||
public int getCharType() {
|
||
return charType;
|
||
}
|
||
|
||
public void setCharType(int charType) {
|
||
this.charType = charType;
|
||
}
|
||
} |