由于业务需要接触到权限控制这一块，网上找到大神的资料 从其中摘录出验证码部分做个记录防止以后忘记。

1.创建验证码对象

1 public class     Verify {2 private String code;//如1+23 private Interager value;//如34  //省略getter和setter 5  }

2. 生成验证码字符串

1  /**  2      * 使用指定源生成验证码  3      * @param verifySize    验证码长度  4      * @param sources   验证码字符源  5      * @return  6      */   7     public static String generateVerifyCode(int verifySize, String sources){   8         if(sources == null || sources.length() == 0){   9             sources = VERIFY_CODES;  10         }  11         int codesLen = sources.length();  12         Random rand = new Random(System.currentTimeMillis());  13         StringBuilder verifyCode = new StringBuilder(verifySize);  14         for(int i = 0; i < verifySize; i++){  15             verifyCode.append(sources.charAt(rand.nextInt(codesLen-1)));  16         }  17         return verifyCode.toString();  18     }

3.生成验证码图片，主要应用java.awt包下的一些工具本人不是很熟悉

1    /**   2      * 生成指定验证码图像文件   3      * @param w   4      * @param h   5      * @param outputFile   6      * @param code   7      * @throws IOException   8      */    9     public static void outputImage(int w, int h, File outputFile, String code) throws IOException{   10         if(outputFile == null){   11             return;   12         }   13         File dir = outputFile.getParentFile();   14         if(!dir.exists()){   15             dir.mkdirs();   16         }   17         try{   18             outputFile.createNewFile();   19             FileOutputStream fos = new FileOutputStream(outputFile);   20             outputImage(w, h, fos, code);   21             fos.close();   22         } catch(IOException e){   23             throw e;   24         }   25     }   26        27     /**  28      * 输出指定验证码图片流  29      * @param w  30      * @param h  31      * @param os  32      * @param code  33      * @throws IOException  34      */   35     public static void outputImage(int w, int h, OutputStream os, String code) throws IOException{   36         int verifySize = code.length();   37         BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);   38         Random rand = new Random();   39         Graphics2D g2 = image.createGraphics();   40         g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);   41         Color[] colors = new Color[5];   42         Color[] colorSpaces = new Color[] { Color.WHITE, Color.CYAN,   43                 Color.GRAY, Color.LIGHT_GRAY, Color.MAGENTA, Color.ORANGE,   44                 Color.PINK, Color.YELLOW };   45         float[] fractions = new float[colors.length];   46         for(int i = 0; i < colors.length; i++){   47             colors[i] = colorSpaces[rand.nextInt(colorSpaces.length)];   48             fractions[i] = rand.nextFloat();   49         }   50         Arrays.sort(fractions);   51            52         g2.setColor(Color.GRAY);// 设置边框色   53         g2.fillRect(0, 0, w, h);   54            55         Color c = getRandColor(200, 250);   56         g2.setColor(c);// 设置背景色   57         g2.fillRect(0, 2, w, h-4);   58            59         //绘制干扰线   60         Random random = new Random();   61         g2.setColor(getRandColor(160, 200));// 设置线条的颜色   62         for (int i = 0; i < 20; i++) {   63             int x = random.nextInt(w - 1);   64             int y = random.nextInt(h - 1);   65             int xl = random.nextInt(6) + 1;   66             int yl = random.nextInt(12) + 1;   67             g2.drawLine(x, y, x + xl + 40, y + yl + 20);   68         }   69            70         // 添加噪点   71         float yawpRate = 0.05f;// 噪声率   72         int area = (int) (yawpRate * w * h);   73         for (int i = 0; i < area; i++) {   74             int x = random.nextInt(w);   75             int y = random.nextInt(h);   76             int rgb = getRandomIntColor();   77             image.setRGB(x, y, rgb);   78         }   79            80         shear(g2, w, h, c);// 使图片扭曲   81    82         g2.setColor(getRandColor(100, 160));   83         int fontSize = h-4;   84         Font font = new Font("Algerian", Font.ITALIC, fontSize);   85         g2.setFont(font);   86         char[] chars = code.toCharArray();   87         for(int i = 0; i < verifySize; i++){   88             AffineTransform affine = new AffineTransform();   89             affine.setToRotation(Math.PI / 4 * rand.nextDouble() * (rand.nextBoolean() ? 1 : -1), (w / verifySize) * i + fontSize/2, h/2);   90             g2.setTransform(affine);   91             g2.drawChars(chars, i, 1, ((w-10) / verifySize) * i + 5, h/2 + fontSize/2 - 10);   92         }   93            94         g2.dispose();   95         ImageIO.write(image, "jpg", os);   96     }   97        98     private static Color getRandColor(int fc, int bc) {   99         if (fc > 255)  100             fc = 255;  101         if (bc > 255)  102             bc = 255;  103         int r = fc + random.nextInt(bc - fc);  104         int g = fc + random.nextInt(bc - fc);  105         int b = fc + random.nextInt(bc - fc);  106         return new Color(r, g, b);  107     }  108       109     private static int getRandomIntColor() {  110         int[] rgb = getRandomRgb();  111         int color = 0;  112         for (int c : rgb) {  113             color = color << 8;  114             color = color | c;  115         }  116         return color;  117     }  118       119     private static int[] getRandomRgb() {  120         int[] rgb = new int[3];  121         for (int i = 0; i < 3; i++) {  122             rgb[i] = random.nextInt(255);  123         }  124         return rgb;  125     }  126   127     private static void shear(Graphics g, int w1, int h1, Color color) {  128         shearX(g, w1, h1, color);  129         shearY(g, w1, h1, color);  130     }  131       132     private static void shearX(Graphics g, int w1, int h1, Color color) {  133   134         int period = random.nextInt(2);  135   136         boolean borderGap = true;  137         int frames = 1;  138         int phase = random.nextInt(2);  139   140         for (int i = 0; i < h1; i++) {  141             double d = (double) (period >> 1)  142                     * Math.sin((double) i / (double) period  143                             + (6.2831853071795862D * (double) phase)  144                             / (double) frames);  145             g.copyArea(0, i, w1, 1, (int) d, 0);  146             if (borderGap) {  147                 g.setColor(color);  148                 g.drawLine((int) d, i, 0, i);  149                 g.drawLine((int) d + w1, i, w1, i);  150             }  151         }  152   153     }  154   155     private static void shearY(Graphics g, int w1, int h1, Color color) {  156   157         int period = random.nextInt(40) + 10; // 50;  158   159         boolean borderGap = true;  160         int frames = 20;  161         int phase = 7;  162         for (int i = 0; i < w1; i++) {  163             double d = (double) (period >> 1)  164                     * Math.sin((double) i / (double) period  165                             + (6.2831853071795862D * (double) phase)  166                             / (double) frames);  167             g.copyArea(i, 0, 1, h1, 0, (int) d);  168             if (borderGap) {  169                 g.setColor(color);  170                 g.drawLine(i, (int) d, i, 0);  171                 g.drawLine(i, (int) d + h1, i, h1);  172             }  173   174         }  175   176     }

4.最后贴源代码。整体流程，

1 import java.awt.Color;  2 import java.awt.Font;  3 import java.awt.Graphics;  4 import java.awt.Graphics2D;  5 import java.awt.RenderingHints;  6 import java.awt.geom.AffineTransform;  7 import java.awt.image.BufferedImage;  8 import java.io.File;  9 import java.io.FileOutputStream; 10 import java.io.IOException; 11 import java.io.OutputStream; 12 import java.util.Arrays; 13 import java.util.Random; 14  15 import javax.imageio.ImageIO; 16  17 import com.sojson.core.shiro.token.manager.TokenManager;//这个主要是shiro框架下的token管理器 18    19 public class VerifyCodeUtils{   20    21     //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   22     public static final String VERIFY_CODES = "23456789ABCDEFGHJKLMNPQRSTUVWXYZ";   23     //验证码的Key 24     public static final String V_CODE = "_CODE"; 25     private static Random random = new Random();   26    27      28     /** 29      * 验证码对象 30      * @author zhou-baicheng 31      * 32      */ 33     public static class Verify{ 34          35         private String code;//如 1 + 2 36          37         private Integer value;//如  3 38  39         public String getCode() { 40             return code; 41         } 42  43         public void setCode(String code) { 44             this.code = code; 45         } 46  47         public Integer getValue() { 48             return value; 49         } 50  51         public void setValue(Integer value) { 52             this.value = value; 53         } 54     } 55    56     /**  57      * 使用系统默认字符源生成验证码  58      * @param verifySize    验证码长度  59      * @return  60      */   61     public static Verify generateVerify(){   62         int number1 = new Random().nextInt(10) + 1;; 63         int number2 = new Random().nextInt(10) + 1;; 64         Verify entity = new Verify(); 65         entity.setCode(number1  + " x " + number2); 66         entity.setValue(number1 + number2); 67         return entity; 68     }   69      70     /**  71      * 使用系统默认字符源生成验证码  72      * @param verifySize    验证码长度  73      * @return  74      */   75     public static String generateVerifyCode(int verifySize){   76         return generateVerifyCode(verifySize, VERIFY_CODES);   77     }   78     /** 79      * 清除验证码 80      */ 81     public static void clearVerifyCode(){ 82         TokenManager.getSession().removeAttribute(V_CODE); 83     } 84      85     /** 86      * 对比验证码    87      */ 88     public static boolean verifyCode(String code){ 89         String v = (String)TokenManager.getVal2Session(V_CODE); 90         return StringUtils.equals(v, StringUtils.lowerCase(code)); 91     } 92      93     /**  94      * 使用指定源生成验证码  95      * @param verifySize    验证码长度  96      * @param sources   验证码字符源  97      * @return  98      */   99     public static String generateVerifyCode(int verifySize, String sources){  100         if(sources == null || sources.length() == 0){  101             sources = VERIFY_CODES;  102         }  103         int codesLen = sources.length();  104         Random rand = new Random(System.currentTimeMillis());  105         StringBuilder verifyCode = new StringBuilder(verifySize);  106         for(int i = 0; i < verifySize; i++){  107             verifyCode.append(sources.charAt(rand.nextInt(codesLen-1)));  108         }  109         return verifyCode.toString();  110     }  111       112     /** 113      * 生成随机验证码文件,并返回验证码值 114      * @param w 115      * @param h 116      * @param outputFile 117      * @param verifySize 118      * @return 119      * @throws IOException 120      */  121     public static String outputVerifyImage(int w, int h, File outputFile, int verifySize) throws IOException{  122         String verifyCode = generateVerifyCode(verifySize);  123         outputImage(w, h, outputFile, verifyCode);  124         return verifyCode;  125     }  126       127     /** 128      * 输出随机验证码图片流,并返回验证码值 129      * @param w 130      * @param h 131      * @param os 132      * @param verifySize 133      * @return 134      * @throws IOException 135      */  136     public static String outputVerifyImage(int w, int h, OutputStream os, int verifySize) throws IOException{  137         String verifyCode = generateVerifyCode(verifySize);  138         outputImage(w, h, os, verifyCode);  139         return verifyCode;  140     }  141       142     /** 143      * 生成指定验证码图像文件 144      * @param w 145      * @param h 146      * @param outputFile 147      * @param code 148      * @throws IOException 149      */  150     public static void outputImage(int w, int h, File outputFile, String code) throws IOException{  151         if(outputFile == null){  152             return;  153         }  154         File dir = outputFile.getParentFile();  155         if(!dir.exists()){  156             dir.mkdirs();  157         }  158         try{  159             outputFile.createNewFile();  160             FileOutputStream fos = new FileOutputStream(outputFile);  161             outputImage(w, h, fos, code);  162             fos.close();  163         } catch(IOException e){  164             throw e;  165         }  166     }  167       168     /** 169      * 输出指定验证码图片流 170      * @param w 171      * @param h 172      * @param os 173      * @param code 174      * @throws IOException 175      */  176     public static void outputImage(int w, int h, OutputStream os, String code) throws IOException{  177         int verifySize = code.length();  178         BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);  179         Random rand = new Random();  180         Graphics2D g2 = image.createGraphics();  181         g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);  182         Color[] colors = new Color[5];  183         Color[] colorSpaces = new Color[] { Color.WHITE, Color.CYAN,  184                 Color.GRAY, Color.LIGHT_GRAY, Color.MAGENTA, Color.ORANGE,  185                 Color.PINK, Color.YELLOW };  186         float[] fractions = new float[colors.length];  187         for(int i = 0; i < colors.length; i++){  188             colors[i] = colorSpaces[rand.nextInt(colorSpaces.length)];  189             fractions[i] = rand.nextFloat();  190         }  191         Arrays.sort(fractions);  192           193         g2.setColor(Color.GRAY);// 设置边框色  194         g2.fillRect(0, 0, w, h);  195           196         Color c = getRandColor(200, 250);  197         g2.setColor(c);// 设置背景色  198         g2.fillRect(0, 2, w, h-4);  199           200         //绘制干扰线  201         Random random = new Random();  202         g2.setColor(getRandColor(160, 200));// 设置线条的颜色  203         for (int i = 0; i < 20; i++) {  204             int x = random.nextInt(w - 1);  205             int y = random.nextInt(h - 1);  206             int xl = random.nextInt(6) + 1;  207             int yl = random.nextInt(12) + 1;  208             g2.drawLine(x, y, x + xl + 40, y + yl + 20);  209         }  210           211         // 添加噪点  212         float yawpRate = 0.05f;// 噪声率  213         int area = (int) (yawpRate * w * h);  214         for (int i = 0; i < area; i++) {  215             int x = random.nextInt(w);  216             int y = random.nextInt(h);  217             int rgb = getRandomIntColor();  218             image.setRGB(x, y, rgb);  219         }  220           221         shear(g2, w, h, c);// 使图片扭曲  222   223         g2.setColor(getRandColor(100, 160));  224         int fontSize = h-4;  225         Font font = new Font("Algerian", Font.ITALIC, fontSize);  226         g2.setFont(font);  227         char[] chars = code.toCharArray();  228         for(int i = 0; i < verifySize; i++){  229             AffineTransform affine = new AffineTransform();  230             affine.setToRotation(Math.PI / 4 * rand.nextDouble() * (rand.nextBoolean() ? 1 : -1), (w / verifySize) * i + fontSize/2, h/2);  231             g2.setTransform(affine);  232             g2.drawChars(chars, i, 1, ((w-10) / verifySize) * i + 5, h/2 + fontSize/2 - 10);  233         }  234           235         g2.dispose();  236         ImageIO.write(image, "jpg", os);  237     }  238       239     private static Color getRandColor(int fc, int bc) {  240         if (fc > 255)  241             fc = 255;  242         if (bc > 255)  243             bc = 255;  244         int r = fc + random.nextInt(bc - fc);  245         int g = fc + random.nextInt(bc - fc);  246         int b = fc + random.nextInt(bc - fc);  247         return new Color(r, g, b);  248     }  249       250     private static int getRandomIntColor() {  251         int[] rgb = getRandomRgb();  252         int color = 0;  253         for (int c : rgb) {  254             color = color << 8;  255             color = color | c;  256         }  257         return color;  258     }  259       260     private static int[] getRandomRgb() {  261         int[] rgb = new int[3];  262         for (int i = 0; i < 3; i++) {  263             rgb[i] = random.nextInt(255);  264         }  265         return rgb;  266     }  267   268     private static void shear(Graphics g, int w1, int h1, Color color) {  269         shearX(g, w1, h1, color);  270         shearY(g, w1, h1, color);  271     }  272       273     private static void shearX(Graphics g, int w1, int h1, Color color) {  274   275         int period = random.nextInt(2);  276   277         boolean borderGap = true;  278         int frames = 1;  279         int phase = random.nextInt(2);  280   281         for (int i = 0; i < h1; i++) {  282             double d = (double) (period >> 1)  283                     * Math.sin((double) i / (double) period  284                             + (6.2831853071795862D * (double) phase)  285                             / (double) frames);  286             g.copyArea(0, i, w1, 1, (int) d, 0);  287             if (borderGap) {  288                 g.setColor(color);  289                 g.drawLine((int) d, i, 0, i);  290                 g.drawLine((int) d + w1, i, w1, i);  291             }  292         }  293   294     }  295   296     private static void shearY(Graphics g, int w1, int h1, Color color) {  297   298         int period = random.nextInt(40) + 10; // 50;  299   300         boolean borderGap = true;  301         int frames = 20;  302         int phase = 7;  303         for (int i = 0; i < w1; i++) {  304             double d = (double) (period >> 1)  305                     * Math.sin((double) i / (double) period  306                             + (6.2831853071795862D * (double) phase)  307                             / (double) frames);  308             g.copyArea(i, 0, 1, h1, 0, (int) d);  309             if (borderGap) {  310                 g.setColor(color);  311                 g.drawLine(i, (int) d, i, 0);  312                 g.drawLine(i, (int) d + h1, i, h1);  313             }  314   315         }  316   317     }  318     public static void main(String[] args) throws IOException{  319         File dir = new File("F:/verifies");  320         int w = 200, h = 80;  321         for(int i = 0; i < 50; i++){  322             String verifyCode = generateVerifyCode(4);  323             File file = new File(dir, verifyCode + ".jpg");  324             outputImage(w, h, file, verifyCode);  325         }  326     }  327     328    329 }

 

5.至此验证码功能已经实现，感谢大神，贴出整个ssm开源项目地址：

　　　　　　　　　　　　　　　　　　　　　　我不是代码的生产者我只是代码的搬运工hhhhh