本文實例為大家分享了java圖片驗證碼具體實現代碼，供大家參考，具體內容如下
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;/* * 步驟： * 1.畫框* 2.畫背景* 3.畫字符* 4.畫干擾線*/public final class ImageUtil { // 驗證碼字符集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'}; // 字符數量private static final int SIZE = 4; // 干擾線數量private static final int LINES = 5; // 寬度private static final int WIDTH = 80; // 高度private static final int HEIGHT = 40; // 字體大小private static final int FONT_SIZE = 30; /** * 生成隨機驗證碼及圖片* Object[0]驗證碼字符串String * Object[1]驗證碼圖片BufferedImage */ public static Object[] createImage() { StringBuffer sb = new StringBuffer(); // 1.創建空白圖片BufferedImage image = new BufferedImage( WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB); // 2.獲取圖片畫筆Graphics graphic = image.getGraphics(); // 3.設置畫筆顏色graphic.setColor(Color.LIGHT_GRAY); // 4.繪製矩形背景graphic.fillRect(0, 0, WIDTH, HEIGHT); // 5.畫隨機字符Random ran = new Random(); for (int i = 0; i <SIZE; i++) { // 取隨機字符索引int n = ran.nextInt(chars.length); // 設置隨機顏色graphic.setColor(getRandomColor()); // 設置字體大小graphic.setFont(new Font( null, Font.BOLD + Font.ITALIC, FONT_SIZE)); // 畫字符graphic.drawString( chars[n] + "", i * WIDTH / SIZE, HEIGHT / 2); // 記錄字符sb.append(chars[n]); } // 6.畫干擾線for (int i = 0; i < LINES; i++) { // 設置隨機顏色graphic.setColor(getRandomColor()); // 隨機畫線graphic.drawLine(ran.nextInt(WIDTH), ran.nextInt(HEIGHT), ran.nextInt(WIDTH), ran.nextInt(HEIGHT)); } // 7.返回驗證碼和圖片return new Object[]{sb.toString(), image}; } /** * 隨機取色*/ 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]; //圖片格式可以自定義，java對png圖片顯示更清楚，輸出路徑可自定義OutputStream os = new FileOutputStream("d:/x.png"); //注意圖片格式與創建格式匹配ImageIO.write(image, "png", os); os.close(); } }以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。