验证码请求图片

复制就可以用 直接请求validateCode方法就可以

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package com.insigma.framework.web.securities.controller;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class ValidateCodeController {
     
    private static final Logger log = LoggerFactory.getLogger(ValidateCodeController.class);
    public final String VERIFY_CODES = "23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz";
    private Random random = new Random();

    public ValidateCodeController() {
     
    }

    @RequestMapping({
     "/validateCode"})
    public void validateCode(HttpServletRequest paramHttpServletRequest, HttpServletResponse paramHttpServletResponse) throws IOException {
     
        log.info("验证码：sid={}", paramHttpServletRequest.getSession().getId());
        paramHttpServletResponse.setHeader("Pragma", "No-cache");
        paramHttpServletResponse.setHeader("Cache-Control", "no-cache");
        paramHttpServletResponse.setContentType("image/jpeg");
        paramHttpServletResponse.setDateHeader("Expires", 0L);
        int w = 85;
        int h = 40;
        BufferedImage image = new BufferedImage(w, h, 1);
        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);
        g2.fillRect(0, 0, w, h);
        Color c = this.getRandColor(200, 250);
        g2.setColor(c);
        g2.fillRect(0, 2, w, h - 4);
        Random random = new Random();
        g2.setColor(this.getRandColor(160, 200));

        int area;
        int fontSize;
        int x;
        int y;
        for(int i = 0; i < 20; ++i) {
     
            area = random.nextInt(w - 1);
            fontSize = random.nextInt(h - 1);
            x = random.nextInt(6) + 1;
            y = random.nextInt(12) + 1;
            g2.drawLine(area, fontSize, area + x + 40, fontSize + y + 20);
        }

        float yawpRate = 0.05F;
        area = (int)(yawpRate * (float)w * (float)h);

        for(fontSize = 0; fontSize < area; ++fontSize) {
     
            x = random.nextInt(w);
            y = random.nextInt(h);
            int rgb = this.getRandomIntColor();
            image.setRGB(x, y, rgb);
        }

        this.shear(g2, w, h, c);
        g2.setColor(this.getRandColor(100, 160));
        fontSize = h - 4;
        Font font = new Font("Arial", 2, fontSize);
        g2.setFont(font);
        String sRand = "";
        int verifySize = 4;
        char[] chars = this.generateVerifyCode(verifySize).toCharArray();

        for(int i = 0; i < verifySize; ++i) {
     
            sRand = sRand + chars[i];
            AffineTransform affine = new AffineTransform();
            affine.setToRotation(0.5235987755982988D * rand.nextDouble() * (double)(rand.nextBoolean() ? 1 : -1), (double)(w / verifySize * i + fontSize / 3), (double)(h / 2));
            g2.setTransform(affine);
            g2.drawString(String.valueOf(chars[i]), (w - 10) / verifySize * i + 2, h / 2 + fontSize / 2 - 5);
        }

        g2.dispose();
        HttpSession session = paramHttpServletRequest.getSession();
        session.setAttribute("validateCode", sRand);
        g2.dispose();
        OutputStream output = paramHttpServletResponse.getOutputStream();
        ImageIO.write(image, "JPEG", output);
        output.flush();
        output.close();
    }

    public String generateVerifyCode(int verifySize) {
     
        return this.generateVerifyCode(verifySize, "23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz");
    }

    public String generateVerifyCode(int verifySize, String sources) {
     
        if (sources == null || sources.length() == 0) {
     
            sources = "23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz";
        }

        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();
    }

    private Color getRandColor(int fc, int bc) {
     
        Random random = new Random();
        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 int getRandomIntColor() {
     
        int[] rgb = this.getRandomRgb();
        int color = 0;
        int[] var3 = rgb;
        int var4 = rgb.length;

        for(int var5 = 0; var5 < var4; ++var5) {
     
            int c = var3[var5];
            color <<= 8;
            color |= c;
        }

        return color;
    }

    private int[] getRandomRgb() {
     
        int[] rgb = new int[3];

        for(int i = 0; i < 3; ++i) {
     
            rgb[i] = this.random.nextInt(255);
        }

        return rgb;
    }

    private void shear(Graphics g, int w1, int h1, Color color) {
     
        this.shearX(g, w1, h1, color);
        this.shearY(g, w1, h1, color);
    }

    private void shearX(Graphics g, int w1, int h1, Color color) {
     
        int period = this.random.nextInt(2);
        boolean borderGap = true;
        int frames = 1;
        int phase = this.random.nextInt(2);

        for(int i = 0; i < h1; ++i) {
     
            double d = (double)(period >> 1) * Math.sin((double)i / (double)period + 6.283185307179586D * (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 void shearY(Graphics g, int w1, int h1, Color color) {
     
        int period = this.random.nextInt(40) + 10;
        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 + 6.283185307179586D * (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);
            }
        }

    }
}