The examples in this article share the specific implementation code of Java image verification code for your reference. The specific content is as follows
import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.util.Random;import javax.imageio.ImageIO;/* * Steps: * 1. Picture frame* 2. Draw the background* 3. Draw characters* 4. Draw the interference line*/public final class ImageUtil { // Verification code character set private static final char[] chars = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'}; // Number of characters private static final int SIZE = 4; // Number of interference lines private static final int LINES = 5; // Width private static final int WIDTH = 80; // Height private static final int HEIGHT = 40; // Font size private static final int FONT_SIZE = 30; /** * Generate random verification code and pictures* Object[0] Verification code string String String String String * Object[1] Verification code image BufferedImage */ public static Object[] createImage() { StringBuffer sb = new StringBuffer(); // 1. Create blank image BufferedImage image = new BufferedImage( WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB); // 2. Get the image brush Graphics graphic = image.getGraphics(); // 3. Set the brush color graphic.setColor(Color.LIGHT_GRAY); // 4. Draw the rectangle background graphic.fillRect(0, 0, WIDTH, HEIGHT); // 5. Draw random characters Random ran = new Random(); for (int i = 0; i <SIZE; i++) { // Take the random character index int n = ran.nextInt(chars.length); // Set the random color graphic.setColor(getRandomColor()); // Set the font size graphic.setFont(new Font( null, Font.BOLD + Font.ITALIC, FONT_SIZE)); // Draw the character graphic.drawString( chars[n] + "", i * WIDTH / SIZE, HEIGHT / 2); // Record the character sb.append(chars[n]); } // 6. Draw the interference line for (int i = 0; i < LINES; i++) { // Set the random color graphic.setColor(getRandomColor()); // Random line drawing graphic.drawLine(ran.nextInt(WIDTH), ran.nextInt(HEIGHT), ran.nextInt(WIDTH), ran.nextInt(HEIGHT)); } // 7. Return verification code and image return new Object[]{sb.toString(), image}; } /** * Random color*/ public static Color getRandomColor() { Random ran = new Random(); Color color = new Color(ran.nextInt(256), ran.nextInt(256), ran.nextInt(256)); return color; } public static void main(String[] args) throws IOException { Object[] objs = createImage(); BufferedImage image = (BufferedImage) objs[1]; //The image format can be customized, Java displays png images more clearly, and the output path can be customized OutputStream os = new FileOutputStream("d:/x.png"); //Note that the image format matches the creation format ImageIO.write(image, "png", os); os.close(); } }The above is all the content of this article. I hope it will be helpful to everyone's learning and I hope everyone will support Wulin.com more.