package com.yeshi.buwan.util;
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import java.awt.Color;
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import java.awt.Graphics2D;
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import java.awt.geom.AffineTransform;
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import java.util.Random;
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import javax.persistence.Entity;
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import javax.persistence.GeneratedValue;
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import javax.persistence.Id;
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/**
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* 图片验证码生成器
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*
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* @author Administrator
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*
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*/
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@Entity
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public class IdentifyingCode {
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/**
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* 验证码图片的宽度。
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*/
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@Id
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@GeneratedValue
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private int width = 80;
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/**
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* 验证码图片的高度。
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*/
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private int height = 30;
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/**
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* 验证码的数量。
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*/
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private Random random = new Random();
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public IdentifyingCode() {
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}
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/**
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* 生成随机颜色
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*
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* @param fc
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* 前景色
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* @param bc
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* 背景色
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* @return Color对象，此Color对象是RGB形式的。
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*/
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public Color getRandomColor(int fc, int bc) {
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if (fc > 255)
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fc = 200;
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if (bc > 255)
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bc = 255;
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int r = fc + random.nextInt(bc - fc);
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int g = fc + random.nextInt(bc - fc);
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int b = fc + random.nextInt(bc - fc);
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return new Color(r, g, b);
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}
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/**
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* 绘制干扰线
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*
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* @param g
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* Graphics2D对象，用来绘制图像
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* @param nums
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* 干扰线的条数
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*/
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public void drawRandomLines(Graphics2D g, int nums) {
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g.setColor(this.getRandomColor(160, 200));
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for (int i = 0; i < nums; i++) {
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int x1 = random.nextInt(width);
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int y1 = random.nextInt(height);
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int x2 = random.nextInt(12);
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int y2 = random.nextInt(12);
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g.drawLine(x1, y1, x2, y2);
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}
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}
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/**
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* 获取随机字符串， 此函数可以产生由大小写字母，汉字，数字组成的字符串
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*
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* @param length
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* 随机字符串的长度
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* @return 随机字符串
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*/
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public String drawRandomString(int length, Graphics2D g) {
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StringBuffer strbuf = new StringBuffer();
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String temp = "";
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int itmp = 0;
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for (int i = 0; i < length; i++) {
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itmp = random.nextInt(26) + 65;
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temp = String.valueOf((char) itmp);
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Color color = new Color(20 + random.nextInt(20),
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20 + random.nextInt(20), 20 + random.nextInt(20));
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g.setColor(color);
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// 想文字旋转一定的角度
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AffineTransform trans = new AffineTransform();
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trans.rotate(random.nextInt(45) * 3.14 / 180, 15 * i + 8, 7);
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// 缩放文字
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float scaleSize = random.nextFloat() + 0.8f;
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if (scaleSize > 1f)
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scaleSize = 1f;
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trans.scale(scaleSize, scaleSize);
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g.setTransform(trans);
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g.drawString(temp, 15 * i + 18, 14);
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strbuf.append(temp);
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}
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g.dispose();
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return strbuf.toString();
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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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}
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