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cn.luues.tool.captcha.graphical.base.Captcha Maven / Gradle / Ivy
package cn.luues.tool.captcha.graphical.base;
import java.awt.*;
import java.awt.geom.CubicCurve2D;
import java.awt.geom.QuadCurve2D;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Base64;
/**
* 验证码抽象类
* Created by Mr-wu
*/
public abstract class Captcha extends Randoms {
// 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}};
// 验证码文本类型
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
// 内置字体
public static final int FONT_1 = 0;
public static final int FONT_2 = 1;
public static final int FONT_3 = 2;
public static final int FONT_4 = 3;
public static final int FONT_5 = 4;
public static final int FONT_6 = 5;
public static final int FONT_7 = 6;
public static final int FONT_8 = 7;
public static final int FONT_9 = 8;
public static final int FONT_10 = 9;
private static final String[] FONT_NAMES = new String[]{"actionj.ttf", "epilog.ttf", "fresnel.ttf", "headache.ttf", "lexo.ttf", "prefix.ttf", "progbot.ttf", "ransom.ttf", "robot.ttf", "scandal.ttf"};
private Font font = null; // 验证码的字体
protected int len = 5; // 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 int charType = TYPE_DEFAULT; // 验证码类型
protected String chars = null; // 当前验证码
/**
* 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);
/**
* 输出base64编码
*
* @return base64编码字符串
*/
public abstract String toBase64();
/**
* 输出base64编码
*
* @param type 编码头
* @return base64编码字符串
*/
public String toBase64(String type) {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
out(outputStream);
return type + Base64.getEncoder().encodeToString(outputStream.toByteArray());
}
/**
* 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，没有则立即生成
*/
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() : 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) {
drawOval(num, null, g);
}
/**
* 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() : color);
int w = 5 + num(10);
g.drawOval(num(width - 25), num(height - 15), w, w);
}
}
/**
* 随机画贝塞尔曲线
*
* @param num 数量
* @param g Graphics2D
*/
public void drawBesselLine(int num, Graphics2D g) {
drawBesselLine(num, null, g);
}
/**
* 随机画贝塞尔曲线
*
* @param num 数量
* @param color 颜色
* @param g Graphics2D
*/
public void drawBesselLine(int num, Color color, Graphics2D g) {
for (int i = 0; i < num; i++) {
g.setColor(color == null ? color() : color);
int x1 = 5, y1 = num(5, height / 2);
int x2 = width - 5, y2 = num(height / 2, height - 5);
int ctrlx = num(width / 4, width / 4 * 3), ctrly = num(5, height - 5);
if (num(2) == 0) {
int ty = y1;
y1 = y2;
y2 = ty;
}
if (num(2) == 0) { // 二阶贝塞尔曲线
QuadCurve2D shape = new QuadCurve2D.Double();
shape.setCurve(x1, y1, ctrlx, ctrly, x2, y2);
g.draw(shape);
} else { // 三阶贝塞尔曲线
int ctrlx1 = num(width / 4, width / 4 * 3), ctrly1 = num(5, height - 5);
CubicCurve2D shape = new CubicCurve2D.Double(x1, y1, ctrlx, ctrly, ctrlx1, ctrly1, x2, y2);
g.draw(shape);
}
}
}
public Font getFont() {
if (font == null) {
try {
setFont(FONT_1);
} catch (Exception e) {
setFont(new Font("Arial", Font.BOLD, 32));
}
}
return font;
}
public void setFont(Font font) {
this.font = font;
}
public void setFont(int font) throws IOException, FontFormatException {
setFont(font, 32f);
}
public void setFont(int font, float size) throws IOException, FontFormatException {
setFont(font, Font.BOLD, size);
}
public void setFont(int font, int style, float size) throws IOException, FontFormatException {
this.font = Font.createFont(Font.TRUETYPE_FONT, getClass().getResourceAsStream("/" + FONT_NAMES[font])).deriveFont(style, size);
}
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;
}
}
