package com.pollex.pam.service.util;
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import java.awt.Color;
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import java.awt.Font;
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import java.awt.Graphics;
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import java.awt.image.BufferedImage;
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import java.util.Random;
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public final class VerifyCodeUtil {
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public static String createcode() {
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String code = "";
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code = "";
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String randomRange = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";// Randomly generated character
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// range (0-9, a-z, A-Z)
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// The number of digits for generating the verification code (here 4 digits)
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for (int i = 0; i < 4; i++) {
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int index = (int) (Math.random() * 62);// Will produce a [0,62) number, excluding decimals
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char randomCode = randomRange.charAt(index);
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code = code + randomCode;
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}
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return code;
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}
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// 3. Generate pictures
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public static BufferedImage createimage(String code) {
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// The first 2 parameters are: width, height. The back is the image type
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// Create a BufferedImage object without transparent color, TYPE_INT_ARGB is
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// with transparent color
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BufferedImage bi = new BufferedImage(130, 50, BufferedImage.TYPE_INT_RGB);
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// 1. Get a canvas
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Graphics g = bi.getGraphics();
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// 2. Add background color
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g.setColor(Color.WHITE);
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g.fillRect(0, 0, 130, 50);
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// 3. Add interference lines
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for (int i = 0; i < 10; i++) {
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Random r = new Random();
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int red = r.nextInt(256);
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int green = r.nextInt(256);
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int blue = r.nextInt(256);
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Color c = new Color(red, green, blue);
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g.setColor(c);
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int x1 = r.nextInt(131);
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int y1 = r.nextInt(51);
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int x2 = r.nextInt(131);
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int y2 = r.nextInt(51);
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g.drawLine(x1, y1, x2, y2);// Draw a line
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// g.drawOval(x1, y1, x2, y2);//Draw a curve
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}
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// 3. Add text
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g.setColor(Color.BLACK);
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g.setFont(new Font(" ", Font.BOLD, 40));
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// 4. Fill the text into the artboard
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g.drawString(code, 15, 40);
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// 5. Close the canvas
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g.dispose();
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return bi;
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}
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}
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