redis+springboot生成图片验证码

﹏ヽ暗。殇╰゛Y 2024-04-17 17:21 70阅读 0赞

html代码

<div style="margin-left: 10px;">
    <img id="verifyCodeImg" src="./initVerifyCode" class="layadmin-user-login-codeimg"  onclick="refreshVerifyCode()">
    </div>
    
    <script>  
    
    function refreshVerifyCode(){
    var timestamp = Date.parse(new Date());
    var url = "/manage/initVerifyCode?timestamp="+timestamp;
    $("#verifyCodeImg").attr("src",url);
    }
    </script>

BaseCtl代码

@Controller
    public class BaseCtl {
    @Autowired
    protected RedisClient redisClient;
    
    /**
    * 创建和保存图片验证码到缓存
    *
    * @param codeNum
    * @return
    */
    public String get4SaveImageVerifyCode(int codeNum) {
    String verifyCode = VerifyCodeUtils.generateVerifyCode(codeNum).toLowerCase();
    String key = getSession().getId();
    putApiImageVerifyCode(key, verifyCode);
    return verifyCode;
    }
    
    /**
    * 获取Sessions
    */
    protected HttpSession getSession() {
    return getRequest().getSession();
    }
    
    /**
    * 获取Request
    */
    protected HttpServletRequest getRequest() {
    ServletRequestAttributes attrs = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
    return attrs.getRequest();
    }
    
    /**
    * 保存Api的验证码
    *
    * @param token
    * @param verifyCode
    */
    public void putApiImageVerifyCode(String token, String verifyCode) {
    String key = RedisContent.API_USER_IMAGE_CODE_KEY + token;
    //写入缓存
    redisClient.setObjEx(key, RedisContent.THREE_MINS, verifyCode);
    }
    
    
    }

RedisContent

/**
     * redis锁对应的key
     */
    public class RedisContent {
    
    public static final String API_USER_IMAGE_CODE_KEY = "SCORPIO:API:CODE:IMAGE_";//图片验证码
    
    * Redis的失效时间
    */
    public static final int ONE_MINS=60;
    public static final int THREE_MINS=180;
    public static final int FIVE_MINS=300;
    public static final int TEN_MINS=600;
    public static final int HALF_HOUR=1800;
    public static final int MINS_5=60*5;
    public static final int MINS_55=60*55;
    public static final int ONE_HOUR=3600;
    public static final int TWO_HOUR=7200;
    public static final int HALF_DAY=3600*12;
    public static final int ONE_DAY=3600*24;
    public static final int SEVEN_DAY=3600*24*7;
    public static final int DAY_365=3600*24*365;
    public static final int DAY_30=3600*24*30;
    public static final int DAY_90=3600*24*90;
    public static final int TEN_YEAR=3600*24*365*10;
    
    }

VerifyCodeUtils

import javax.imageio.ImageIO;
    import java.awt.*;
    import java.awt.geom.AffineTransform;
    import java.awt.image.BufferedImage;
    import java.io.*;
    import java.util.Arrays;
    import java.util.Random;
    
    public class VerifyCodeUtils{
    
    	//使用到Algerian字体，系统里没有的话需要安装字体，字体只显示大写，去掉了1,0,i,o几个容易混淆的字符
    	public static final String VERIFY_CODES = "23456789ABCDEFGHJKLMNPQRSTUVWXYZ";
    	public static final String PHONE_VERIFY_CODES = "0123456789";
    	private static Random random = new Random();
    
    
    	/**
    	 * 使用系统默认字符源生成验证码
    	 * @param verifySize	验证码长度
    	 * @return
    	 */
    	public static String generateVerifyCode(int verifySize){
    		return generateVerifyCode(verifySize, VERIFY_CODES);
    	}
    	/**
    	 * 使用指定源生成验证码
    	 * @param verifySize	验证码长度
    	 * @param sources	验证码字符源
    	 * @return
    	 */
    	public static String generateVerifyCode(int verifySize, String sources){
    		if(sources == null || sources.length() == 0){
    			sources = VERIFY_CODES;
    		}
    		int codesLen = sources.length();
    		Random rand = new Random(System.currentTimeMillis());
    		StringBuilder verifyCode = new StringBuilder(verifySize);
    		for(int i = 0; i < verifySize; i++){
    			verifyCode.append(sources.charAt(rand.nextInt(codesLen-1)));
    		}
    		return verifyCode.toString();
    	}
    
    
    	/**
    	 * 使用数字生成验证码
    	 * @param verifySize	验证码长度
    	 * @return
    	 */
    	public static String generateNumVerifyCode(int verifySize){
    		return generateVerifyCode(verifySize,PHONE_VERIFY_CODES);
    	}
    	
    	/**
    	 * 生成随机验证码文件,并返回验证码值
    	 * @param w
    	 * @param h
    	 * @param outputFile
    	 * @param verifySize
    	 * @return
    	 * @throws IOException
    	 */
    	public static String outputVerifyImage(int w, int h, File outputFile, int verifySize) throws IOException{
    		String verifyCode = generateVerifyCode(verifySize);
    		outputImage(w, h, outputFile, verifyCode);
    		return verifyCode;
    	}
    	
    	/**
    	 * 输出随机验证码图片流,并返回验证码值
    	 * @param w
    	 * @param h
    	 * @param os
    	 * @param verifySize
    	 * @return
    	 * @throws IOException
    	 */
    	public static String outputVerifyImage(int w, int h, OutputStream os, int verifySize) throws IOException{
    		String verifyCode = generateVerifyCode(verifySize);
    		outputImage(w, h, os, verifyCode);
    		return verifyCode;
    	}
    	
    	/**
    	 * 生成指定验证码图像文件
    	 * @param w
    	 * @param h
    	 * @param outputFile
    	 * @param code
    	 * @throws IOException
    	 */
    	public static void outputImage(int w, int h, File outputFile, String code) throws IOException{
    		if(outputFile == null){
    			return;
    		}
    		File dir = outputFile.getParentFile();
    		if(!dir.exists()){
    			dir.mkdirs();
    		}
    		try{
    			outputFile.createNewFile();
    			FileOutputStream fos = new FileOutputStream(outputFile);
    			outputImage(w, h, fos, code);
    			fos.close();
    		} catch(IOException e){
    			throw e;
    		}
    	}
    	
    	/**
    	 * 输出指定验证码图片流
    	 * @param w
    	 * @param h
    	 * @param os
    	 * @param code
    	 * @throws IOException
    	 */
    	public static void outputImage(int w, int h, OutputStream os, String code) throws IOException{
    		BufferedImage image = getOutputImage(w,h,code);
    		ImageIO.write(image, "jpg", os);
    	}
    
    	/**
    	 * 获取图片流
    	 * @param w
    	 * @param h
    	 * @param code
    	 * @return
    	 * @throws IOException
    	 */
    	public static BufferedImage getOutputImage(int w, int h, String code) throws IOException{
    		int verifySize = code.length();
    		BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
    		Random rand = new Random();
    		Graphics2D g2 = image.createGraphics();
    		g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
    		Color[] colors = new Color[5];
    		Color[] colorSpaces = new Color[] { Color.WHITE, Color.CYAN,
    			Color.GRAY, Color.LIGHT_GRAY, Color.MAGENTA, Color.ORANGE,
    			Color.PINK, Color.YELLOW };
    		float[] fractions = new float[colors.length];
    		for(int i = 0; i < colors.length; i++){
    			colors[i] = colorSpaces[rand.nextInt(colorSpaces.length)];
    			fractions[i] = rand.nextFloat();
    		}
    		Arrays.sort(fractions);
    
    		g2.setColor(Color.GRAY);// 设置边框色
    		g2.fillRect(0, 0, w, h);
    
    		Color c = getRandColor(200, 250);
    		g2.setColor(c);// 设置背景色
    		g2.fillRect(0, 2, w, h-4);
    
    		//绘制干扰线
    		Random random = new Random();
    		g2.setColor(getRandColor(160, 200));// 设置线条的颜色
    		for (int i = 0; i < 20; i++) {
    			int x = random.nextInt(w - 1);
    			int y = random.nextInt(h - 1);
    			int xl = random.nextInt(6) + 1;
    			int yl = random.nextInt(12) + 1;
    			g2.drawLine(x, y, x + xl + 40, y + yl + 20);
    		}
    
    		// 添加噪点
    		float yawpRate = 0.05f;// 噪声率
    		int area = (int) (yawpRate * w * h);
    		for (int i = 0; i < area; i++) {
    			int x = random.nextInt(w);
    			int y = random.nextInt(h);
    			int rgb = getRandomIntColor();
    			image.setRGB(x, y, rgb);
    		}
    
    		shear(g2, w, h, c);// 使图片扭曲
    
    		g2.setColor(getRandColor(100, 160));
    		int fontSize = h-4;
    		Font font = new Font("Algerian", Font.ITALIC, fontSize);
    		g2.setFont(font);
    		char[] chars = code.toCharArray();
    		for(int i = 0; i < verifySize; i++){
    			AffineTransform affine = new AffineTransform();
    			affine.setToRotation(Math.PI / 4 * rand.nextDouble() * (rand.nextBoolean() ? 1 : -1), (w / verifySize) * i + fontSize/2, h/2);
    			g2.setTransform(affine);
    			g2.drawChars(chars, i, 1, ((w-10) / verifySize) * i + 5, h/2 + fontSize/2 - 10);
    		}
    		g2.dispose();
    		return image;
    	}
    	private static Color getRandColor(int fc, int bc) {
    		if (fc > 255)
    			fc = 255;
    		if (bc > 255)
    			bc = 255;
    		int r = fc + random.nextInt(bc - fc);
    		int g = fc + random.nextInt(bc - fc);
    		int b = fc + random.nextInt(bc - fc);
    		return new Color(r, g, b);
    	}
    	
    	private static int getRandomIntColor() {
    		int[] rgb = getRandomRgb();
    		int color = 0;
    		for (int c : rgb) {
    			color = color << 8;
    			color = color | c;
    		}
    		return color;
    	}
    	
    	private static int[] getRandomRgb() {
    		int[] rgb = new int[3];
    		for (int i = 0; i < 3; i++) {
    			rgb[i] = random.nextInt(255);
    		}
    		return rgb;
    	}
    
    	private static void shear(Graphics g, int w1, int h1, Color color) {
    		shearX(g, w1, h1, color);
    		shearY(g, w1, h1, color);
    	}
    	
    	private static void shearX(Graphics g, int w1, int h1, Color color) {
    
    		int period = random.nextInt(2);
    
    		boolean borderGap = true;
    		int frames = 1;
    		int phase = random.nextInt(2);
    
    		for (int i = 0; i < h1; i++) {
    			double d = (double) (period >> 1)
    					* Math.sin((double) i / (double) period
    							+ (6.2831853071795862D * (double) phase)
    							/ (double) frames);
    			g.copyArea(0, i, w1, 1, (int) d, 0);
    			if (borderGap) {
    				g.setColor(color);
    				g.drawLine((int) d, i, 0, i);
    				g.drawLine((int) d + w1, i, w1, i);
    			}
    		}
    
    	}
    
    	private static void shearY(Graphics g, int w1, int h1, Color color) {
    
    		int period = random.nextInt(40) + 10; // 50;
    
    		boolean borderGap = true;
    		int frames = 20;
    		int phase = 7;
    		for (int i = 0; i < w1; i++) {
    			double d = (double) (period >> 1)
    					* Math.sin((double) i / (double) period
    							+ (6.2831853071795862D * (double) phase)
    							/ (double) frames);
    			g.copyArea(i, 0, 1, h1, 0, (int) d);
    			if (borderGap) {
    				g.setColor(color);
    				g.drawLine(i, (int) d, i, 0);
    				g.drawLine(i, (int) d + h1, i, h1);
    			}
    
    		}
    
    	}
    	public static void main(String[] args) throws IOException{
    		File dir = new File("F:/verifies");
    		int w = 200, h = 80;
    		for(int i = 0; i < 50; i++){
    			String verifyCode = generateVerifyCode(4);
    			File file = new File(dir, verifyCode + ".jpg");
    			outputImage(w, h, file, verifyCode);
    		}
    	}
    }

VerifyCodeController

import com.scorpio.base.BaseCtl;
    import com.scorpio.platform.redis.RedisClient;
    import com.scorpio.platform.util.VerifyCodeUtils;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import javax.annotation.Resource;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    
    @Controller
    @RequestMapping("/manage")
    public class VerifyCodeController extends BaseCtl{
    
    	@Resource
    	protected RedisClient redisClient;
    	
    	/**
    	 * 初始化图片验证码
    	 */
    	@RequestMapping(value="/initVerifyCode")
    	public void initVerifyCode(HttpServletResponse response, HttpServletRequest request) throws IOException {
    		response.setContentType("image/jpeg");
    		//禁止图像缓存
    		response.setHeader("Pragma", "no-cache");
    		response.setHeader("Cache-Control", "no-cache");
    		response.setDateHeader("Expires", 0);
    		String verifyCode = get4SaveImageVerifyCode(4);
    		VerifyCodeUtils.outputImage(120, 40, response.getOutputStream(), verifyCode);
    	}
    	
    	
    }