Java工具类----验证码

传智播客视频图形验证码工具类

package com.xxx.image;


import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;


import javax.imageio.ImageIO;


public class VerifyCode {
private int w = 70;
private int h = 35;
private Random r = new Random();
private String[] fontNames = {"宋体","华文楷体","黑体","华文隶书","微软雅黑","楷体_GB2312"};
private String codes = "23456789abcdefghjkmnpqrstuvwxyzABCDEFGHIJKMNPQRSTUVWXYZ";
private Color bgColor = new Color(255,255,255);
private String text;

private Color randomColor() {
int red = r.nextInt(150);
int green = r.nextInt(150);
int blue = r.nextInt(150);
return new Color(red,green,blue);
}

private Font randomFont() {
int index = r.nextInt(fontNames.length);
String fontName = fontNames[index];
int style = r.nextInt(4);
int size = r.nextInt(5) + 24;
return new Font(fontName,style,size);
}

private void drawLine(BufferedImage image) {
int num = 3;
Graphics2D g2 = (Graphics2D)image.getGraphics();
for(int i = 0; i < num; i++) {
int x1 = r.nextInt(w);
int y1 = r.nextInt(h);
int x2 = r.nextInt(w);
int y2 = r.nextInt(h);
g2.setStroke(new BasicStroke(1.5F));//设置线条的粗细
g2.setColor(Color.BLUE);
g2.drawLine(x1, y1, x2, y2);
}
}

private char randomChar() {
int index = r.nextInt(codes.length());
return codes.charAt(index);
}

private BufferedImage createImage() {
BufferedImage image = new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = (Graphics2D)image.getGraphics();
g2.setColor(this.bgColor);
g2.fillRect(0, 0, w, h);
return image;
}

public BufferedImage getImage() {
BufferedImage image = createImage();
Graphics2D g2 = (Graphics2D)image.getGraphics();
StringBuilder sb = new StringBuilder();
for(int i = 0;i < 4; i++) {
String s = randomChar() + "";
sb.append(s);
float x = i * 1.0F * w / 4;
g2.setFont(randomFont());
g2.setColor(randomColor());
g2.drawString(s, x, h-5);
}
this.text = sb.toString();
drawLine(image);
return image;
}

public String getText() {
return text;
}

public static void output(BufferedImage image,OutputStream out) throws IOException {
ImageIO.write(image, "JPEG", out);
}

}

在其他类中调用

@Test
public void fun() throws FileNotFoundException, IOException {
VerifyCode vc = new VerifyCode();
BufferedImage bi = vc.getImage();
VerifyCode.output(bi, new FileOutputStream("F:/xxx.jpg"));

System.out.println(vc.getText());

}

结果截图：