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修复验证码位数的bug，优化代码

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synchronized
2018-07-27 12:02:33 +08:00
parent a4e61fd633
commit a548f7af0b
16 changed files with 675 additions and 461 deletions
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117
src/main/java/com/wf/captcha/GifCaptcha.java
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@@ -7,98 +7,87 @@ import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
/**
* <p>Gif验证码类</p>
*
* @author: wuhongjun
* @version:1.0
* Gif验证码类
* Created by 王帆 on 2018-07-27 上午 10:08.
*/
public class GifCaptcha extends Captcha
{
public GifCaptcha()
{
public class GifCaptcha extends Captcha {
public GifCaptcha() {
}
public GifCaptcha(int width,int height){
this.width = width;
this.height = height;
alphas();
public GifCaptcha(int width, int height) {
setWidth(width);
setHeight(height);
}
public GifCaptcha(int width,int height,int len){
this(width,height);
this.len = len;
public GifCaptcha(int width, int height, int len) {
this(width, height);
setLen(len);
}
public GifCaptcha(int width,int height,int len,Font font)
{
this(width,height,len);
this.font = font;
public GifCaptcha(int width, int height, int len, Font font) {
this(width, height, len);
setFont(font);
}
@Override
public void out(OutputStream os)
{
try
{
GifEncoder gifEncoder = new GifEncoder(); // gif编码类，这个利用了洋人写的编码类，所有类都在附件中
//生成字符
public boolean out(OutputStream os) {
checkAlpha();
boolean ok = false;
try {
char[] rands = textChar(); // 获取验证码数组
GifEncoder gifEncoder = new GifEncoder();
gifEncoder.start(os);
gifEncoder.setQuality(180);
gifEncoder.setDelay(100);
gifEncoder.setRepeat(0);
BufferedImage frame;
char[] rands = textChar();
Color fontcolor[]=new Color[len];
for(int i=0;i<len;i++)
{
fontcolor[i]=new Color(20 + num(110), 20 + num(110), 20 + num(110));
Color fontcolor[] = new Color[len];
for (int i = 0; i < len; i++) {
fontcolor[i] = new Color(20 + num(110), 20 + num(110), 20 + num(110));
}
for(int i=0;i<len;i++)
{
frame=graphicsImage(fontcolor, rands, i);
for (int i = 0; i < len; i++) {
frame = graphicsImage(fontcolor, rands, i);
gifEncoder.addFrame(frame);
frame.flush();
}
gifEncoder.finish();
}finally
{
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
ok = true;
} finally {
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return ok;
}
/**
* 画随机码图
*
* @param fontcolor 随机字体颜色
* @param strs 字符数组
* @param flag 透明度使用
* @param strs 字符数组
* @param flag 透明度使用
* @return BufferedImage
*/
private BufferedImage graphicsImage(Color[] fontcolor,char[] strs,int flag)
{
BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);
//或得图形上下文
//Graphics2D g2d=image.createGraphics();
Graphics2D g2d = (Graphics2D)image.getGraphics();
//利用指定颜色填充背景
g2d.setColor(Color.WHITE);
private BufferedImage graphicsImage(Color[] fontcolor, char[] strs, int flag) {
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = (Graphics2D) image.getGraphics();
g2d.setColor(Color.WHITE); // 填充背景颜色
g2d.fillRect(0, 0, width, height);
AlphaComposite ac3;
int h = height - ((height - font.getSize()) >>1) ;
int w = width/len;
int h = height - ((height - font.getSize()) >> 1);
int w = width / len;
g2d.setFont(font);
for(int i=0;i<len;i++)
{
for (int i = 0; i < len; i++) {
ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getAlpha(flag, i));
g2d.setComposite(ac3);
g2d.setColor(fontcolor[i]);
g2d.drawOval(num(width), num(height), 5+num(10), 5+num(10));
g2d.drawString(strs[i]+"", (width-(len-i)*w)+(w-font.getSize())+1, h-4);
g2d.drawOval(num(width), num(height), 5 + num(10), 5 + num(10));
g2d.drawString(String.valueOf(strs[i]), (width - (len - i) * w) + (w - font.getSize()) + 1, h - 4);
}
g2d.dispose();
return image;
@@ -106,13 +95,15 @@ public class GifCaptcha extends Captcha
/**
* 获取透明度,从0到1,自动计算步长
* @return float 透明度
*
* @param i
* @param j
* @return 透明度
*/
private float getAlpha(int i,int j)
{
int num = i+j;
float r = (float)1/len,s = (len+1) * r;
return num > len ? (num *r - s) : num * r;
private float getAlpha(int i, int j) {
int num = i + j;
float r = (float) 1 / len, s = (len + 1) * r;
return num > len ? (num * r - s) : num * r;
}
}