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);
}
}
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