| 提交 | 用户 | age | ||
| 826b66 | 1 | package com.hx.util; |
| C | 2 | |
| 3 | import java.awt.Color; | |
| 4 | import java.awt.Font; | |
| 5 | import java.awt.Graphics; | |
| 6 | import java.awt.image.BufferedImage; | |
| 7 | import java.io.ByteArrayOutputStream; | |
| 8 | import java.io.IOException; | |
| 9 | import java.util.Base64; | |
| 10 | ||
| 11 | import javax.imageio.ImageIO; | |
| 12 | ||
| 13 | /** | |
| 14 | * 验证码生成器 | |
| 15 | * @author ChenJiaHe | |
| 16 | * @Date 2020-06-17 | |
| 17 | */ | |
| 18 | public class CheckCodeImageUtil { | |
| 19 | ||
| 20 | private final static int WIDTH = 60; | |
| 21 | private final static int HEIGHT = 20; | |
| 22 | ||
| 23 | private static char[] generateCheckCode() { | |
| 24 | // ������֤����ַ�� | |
| 25 | String chars = "123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; | |
| 26 | char[] rands = new char[4]; | |
| 27 | for (int i = 0; i < 4; i++) { | |
| 28 | int rand = (int) (Math.random() * 35); | |
| 29 | rands[i] = chars.charAt(rand); | |
| 30 | } | |
| 31 | return rands; | |
| 32 | } | |
| 33 | ||
| 34 | private static void drawRands(Graphics g, char[] rands) { | |
| 35 | g.setColor(Color.BLACK); | |
| 36 | g.setFont(new Font(null, Font.ITALIC | Font.BOLD, 18)); | |
| 37 | // �ڲ�ͬ�ĸ߶��������֤���ÿ���ַ� | |
| 38 | g.drawString("" + rands[0], 1, 17); | |
| 39 | g.drawString("" + rands[1], 16, 15); | |
| 40 | g.drawString("" + rands[2], 31, 18); | |
| 41 | g.drawString("" + rands[3], 46, 16); | |
| 42 | } | |
| 43 | ||
| 44 | private static void drawBackground(Graphics g) { | |
| 45 | // ������ | |
| 46 | g.setColor(new Color(0xDCDCDC)); | |
| 47 | g.fillRect(0, 0, WIDTH, HEIGHT); | |
| 48 | // ������120�����ŵ� | |
| 49 | for (int i = 0; i < 120; i++) { | |
| 50 | int x = (int) (Math.random() * WIDTH); | |
| 51 | int y = (int) (Math.random() * HEIGHT); | |
| 52 | int red = (int) (Math.random() * 255); | |
| 53 | int green = (int) (Math.random() * 255); | |
| 54 | int blue = (int) (Math.random() * 255); | |
| 55 | g.setColor(new Color(red, green, blue)); | |
| 56 | g.drawOval(x, y, 1, 0); | |
| 57 | } | |
| 58 | } | |
| 59 | ||
| 60 | public static String[] createImage(String id) | |
| 61 | { | |
| 62 | ByteArrayOutputStream bos = null; | |
| 63 | String reStr = ""; | |
| 64 | char[] rands = null; | |
| 65 | try { | |
| 66 | BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB); | |
| 67 | Graphics g = image.getGraphics(); | |
| 68 | ||
| 69 | rands = generateCheckCode(); | |
| 70 | ||
| 71 | drawBackground(g); | |
| 72 | drawRands(g, rands); | |
| 73 | ||
| 74 | g.dispose(); | |
| 75 | ||
| 76 | bos = new ByteArrayOutputStream(); | |
| 77 | ImageIO.write(image, "JPEG", bos); | |
| 78 | byte[] buf = bos.toByteArray(); | |
| 79 | reStr = Base64.getEncoder().encodeToString(buf); | |
| 80 | ||
| 81 | }catch (Exception e) { | |
| 82 | e.printStackTrace(); | |
| 83 | }finally { | |
| 84 | if(bos != null) | |
| 85 | { | |
| 86 | try { | |
| 87 | bos.close(); | |
| 88 | } catch (IOException e) { | |
| 89 | e.printStackTrace(); | |
| 90 | } | |
| 91 | bos = null; | |
| 92 | } | |
| 93 | } | |
| 94 | return new String[] {new String(rands),reStr}; | |
| 95 | } | |
| 96 | } | |
