import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Random;
import javax.imageio.ImageIO;
public class BuildingVerification {
public static String getVerification(String saveImagePath){
int width = 70;
int height = 30;
BufferedImage buffImg = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);
Graphics2D g = buffImg.createGraphics();
// 创建一个随机数生成器类
Random random = new Random();
// 设定图像背景色(因为是做背景,所以偏淡)
g.setColor(getRandColor(200, 250));
g.fillRect(0, 0, width, height);
// 设置字体
Font font = new Font("Times New Roman", Font.HANGING_BASELINE, 28);
g.setFont(font);
// 画边框。
g.setColor(Color.BLACK);
g.drawRect(0, 0, width - 1, height - 1);
// 随机产生155条干扰线,使图象中的认证码不易被其它程序探测到。
g.setColor(Color.GRAY);
g.setColor(getRandColor(160,200));
for (int i = 0; i < 155; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x, y, x + xl, y + yl);
}
// randomCode用于保存随机产生的验证码,以便用户登录后进行验证。
StringBuffer randomCode = new StringBuffer();
String code = null;
int length = 4;
String base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
int size = base.length();
for (int i = 0; i < length; i++) {
// 得到随机产生的验证码数字。
int start = random.nextInt(size);
String strRand = base.substring(start, start + 1);
g.setColor(getRandColor(1, 100));
g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));
g.drawString(strRand, 15 * i + 6, 24);
randomCode.append(strRand);
}
code = randomCode.toString();
g.dispose();
File file = new File(saveImagePath);
String suffix = saveImagePath.substring(saveImagePath.lastIndexOf('.')+1);
try {
ImageIO.write(buffImg, suffix, file);
} catch (IOException e) {
e.printStackTrace();
}
return code;
}
private static Color getRandColor(int fc, int bc) {
Random random = new Random();
if (fc > 255){
fc = 255;
}
if (bc > 255){
bc = 255;
}
int r = fc + random.nextInt(bc - fc);
int g = fc + random.nextInt(bc - fc);
int b = fc + random.nextInt(bc - fc);
return new Color(r, g, b);
}
}
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Random;
import javax.imageio.ImageIO;
public class BuildingVerification {
public static String getVerification(String saveImagePath){
int width = 70;
int height = 30;
BufferedImage buffImg = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);
Graphics2D g = buffImg.createGraphics();
// 创建一个随机数生成器类
Random random = new Random();
// 设定图像背景色(因为是做背景,所以偏淡)
g.setColor(getRandColor(200, 250));
g.fillRect(0, 0, width, height);
// 设置字体
Font font = new Font("Times New Roman", Font.HANGING_BASELINE, 28);
g.setFont(font);
// 画边框。
g.setColor(Color.BLACK);
g.drawRect(0, 0, width - 1, height - 1);
// 随机产生155条干扰线,使图象中的认证码不易被其它程序探测到。
g.setColor(Color.GRAY);
g.setColor(getRandColor(160,200));
for (int i = 0; i < 155; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x, y, x + xl, y + yl);
}
// randomCode用于保存随机产生的验证码,以便用户登录后进行验证。
StringBuffer randomCode = new StringBuffer();
String code = null;
int length = 4;
String base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
int size = base.length();
for (int i = 0; i < length; i++) {
// 得到随机产生的验证码数字。
int start = random.nextInt(size);
String strRand = base.substring(start, start + 1);
g.setColor(getRandColor(1, 100));
g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));
g.drawString(strRand, 15 * i + 6, 24);
randomCode.append(strRand);
}
code = randomCode.toString();
g.dispose();
File file = new File(saveImagePath);
String suffix = saveImagePath.substring(saveImagePath.lastIndexOf('.')+1);
try {
ImageIO.write(buffImg, suffix, file);
} catch (IOException e) {
e.printStackTrace();
}
return code;
}
private static Color getRandColor(int fc, int bc) {
Random random = new Random();
if (fc > 255){
fc = 255;
}
if (bc > 255){
bc = 255;
}
int r = fc + random.nextInt(bc - fc);
int g = fc + random.nextInt(bc - fc);
int b = fc + random.nextInt(bc - fc);
return new Color(r, g, b);
}
}