Java代码生成图片验证码实现

package ;

import ;

import ;

import .Graphics2D;

import ;

import ;

import ;

import ;

import ;

import ;

/**

* 验证码生成器

*/

public class ValidateCode {

// 图片的宽度。

private int width = 160;

// 图片的高度。

private int height = 40;

// 验证码字符个数

private int codeCount = 5;

// 验证码干扰线数

private int lineCount = 150;

// 验证码

private static String code = null;

// 验证码图片Buffer

private BufferedImage buffImg=null;

private char[] codeSequence = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J','K', 'L',

'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W','X', 'Y',

'Z', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

public ValidateCode() {

this.createCode();

}

/**

*

* @param width 图片宽

* @param height 图片高

*/

public ValidateCode(int width,int height) {

this.width=width;

this.height=height;

this.createCode();

}

/**

*

* @param width 图片宽

* @param height 图片高

* @param codeCount 字符个数

* @param lineCount 干扰线条数

*/

public ValidateCode(int width,int height,int codeCount,int lineCount) {

this.width=width;

this.height=height;

this.codeCount=codeCount;

this.lineCount=lineCount;

this.createCode();

}

public void createCode() {

int x = 0,fontHeight=0,codeY=0;

int red = 0, green = 0, blue = 0;

x = width / (codeCount +2);//每个字符的宽度

fontHeight = height - 2;//字体的高度

codeY = height - 4;

// 图像buffer

buffImg = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);

Graphics2D g = ();

// 生成随机数

Random random = new Random();

// 将图像填充为白色

();

(0, 0, width, height);

// 创建字体

ImgFontByte imgFont=new ImgFontByte();

Font font =(fontHeight);

(font);

for (int i = 0; i < lineCount; i++) {

int xs = (width);

int ys = (height);

int xe = xs+(width/8);

int ye = ys+(height/8);

red = (255);

green = (255);

blue = (255);

(new Color(red, green, blue));

(xs, ys, xe, ye);

}

// randomCode记录随机产生的验证码

StringBuffer randomCode = new StringBuffer();

// 随机产生codeCount个字符的验证码。

for (int i = 0; i < codeCount; i++) {

String strRand = (codeSequence[()]);

// 产生随机的颜色值，让输出的每个字符的颜色值都将不同。

red = (255);

green = (255);

blue = (255);

(new Color(red, green, blue));

(strRand, (i + 1) * x, codeY);

// 将产生的四个随机数组合在一起。

(strRand);

}

// 将四位数字的验证码保存到Session中。

code = ();

}

public void write(String path) throws IOException {

OutputStream sos = new FileOutputStream(path);

this.write(sos);

}

public void write(OutputStream sos) throws IOException {

(buffImg, "png", sos);

();

}

public BufferedImage getBuffImg() {

return buffImg;

}

public static String getCode() {

return code;

}

}