验证码 · fei5156/java_component@b61de46 · GitHub
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验证码
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‎chapter6_verifycode/pom.xml‎

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‎chapter6_verifycode/src/main/java/com/critc/verify/controller/VerifyController.java‎

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package com.critc.verify.controller;
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import com.critc.verify.util.RandomCodeUtil;
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import com.critc.verify.util.VerifyCodeUtil;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.servlet.ModelAndView;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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/**
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* Author 孔垂云
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* Date 2017/5/24.
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*/
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@Controller
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public class VerifyController {
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/**
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* 进入界面
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*
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* @return
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*/
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@RequestMapping("/verify")
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public ModelAndView verify() {
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ModelAndView mv = new ModelAndView();
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mv.setViewName("verify");
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return mv;
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}
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/**
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* 生成图形验证码
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*
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* @param request
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* @param response
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* @param username
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* @throws Exception
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*/
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@RequestMapping(value = "/generateVerifyCode")
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public void generateVerifyCode(HttpServletRequest request, HttpServletResponse response, String username) throws Exception {
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String randomCode = RandomCodeUtil.createRandomNum(4);//生成四位随机数
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response.setContentType("image/jpeg");
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//禁止图像缓存。
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response.setHeader("Pragma", "no-cache");
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response.setHeader("Cache-Control", "no-cache");
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response.setDateHeader("Expires", 0);
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VerifyCodeUtil vCode = new VerifyCodeUtil(120, 40, 4, 100, randomCode);
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request.getSession().setAttribute("verifyCode", randomCode);//放入到session中
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vCode.write(response.getOutputStream());
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}
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}

‎chapter6_verifycode/src/main/java/com/critc/verify/util/ImgFontByte.java‎

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package com.critc.verify.util;
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import java.awt.*;
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import java.io.ByteArrayInputStream;
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/**
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* Author 孔垂云
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* Date 2017/5/24.
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*
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*/
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public class ImgFontByte {
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public Font getFont(int fontHeight) {
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try {
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Font baseFont = Font.createFont(Font.TRUETYPE_FONT, new ByteArrayInputStream(hex2byte(getFontByteStr())));
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return baseFont.deriveFont(Font.PLAIN, fontHeight);
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} catch (Exception e) {
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return new Font("Arial", Font.PLAIN, fontHeight);
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}
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}
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private byte[] hex2byte(String str) {
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if (str == null)
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return null;
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str = str.trim();
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int len = str.length();
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if (len == 0 || len % 2 == 1)
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return null;
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byte[] b = new byte[len / 2];
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try {
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for (int i = 0; i < str.length(); i += 2) {
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b[i / 2] = (byte) Integer.decode("0x" + str.substring(i, i + 2)).intValue();
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}
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return b;
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} catch (Exception e) {
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return null;
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}
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}
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/**
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* ttf字体文件的十六进制字符串
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* @return
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*/
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private String getFontByteStr() {
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return null;
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}
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}

‎chapter6_verifycode/src/main/java/com/critc/verify/util/RandomCodeUtil.java‎

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package com.critc.verify.util;
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import java.util.Random;
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/**
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*
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* 功能描述:随机数生成工具
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*
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* @version 1.0.0
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* @author 孔垂云
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* @2015年3月4日
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*/
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public class RandomCodeUtil {
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private static final char[] codeSequenceRandom = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '1', '2', '3', '4',
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'5', '6', '7', '8', '9', '0' };
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private static final char[] numberSequenceRandom = { '1', '2', '3', '4', '5', '6', '7', '8', '9', '0' };
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/**
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*
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* 功能描述:生成字符串随机数
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*
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* @return String
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* @version 1.0.0
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* @author 孔垂云
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*/
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public static String createRandomCode(int count) {
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String serialNum = "";
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Random random = new Random();
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for (int i = 0; i < count; i++) {
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String strRand = String.valueOf(codeSequenceRandom[random.nextInt(codeSequenceRandom.length)]);
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serialNum += strRand;
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}
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return serialNum;
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}
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/**
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* 生成数字随机数
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* @param count
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* @return
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*/
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public static String createRandomNum(int count) {
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String serialNum = "";
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Random random = new Random();
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for (int i = 0; i < count; i++) {
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String strRand = String.valueOf(numberSequenceRandom[random.nextInt(numberSequenceRandom.length)]);
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serialNum += strRand;
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}
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return serialNum;
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}
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}

‎chapter6_verifycode/src/main/java/com/critc/verify/util/VerifyCodeUtil.java‎

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package com.critc.verify.util;
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import javax.imageio.ImageIO;
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import java.awt.*;
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import java.awt.image.BufferedImage;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.util.Random;
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/**
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* 验证码工具类
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*/
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public class VerifyCodeUtil {
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// 图片的宽度。
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private int width = 120;
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// 图片的高度。
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private int height = 40;
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// 验证码字符个数
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private int codeCount = 5;
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// 验证码干扰线数
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private int lineCount = 150;
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// 验证码
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private String code = null;
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// 验证码图片Buffer
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private BufferedImage buffImg = null;
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public VerifyCodeUtil(String randomCode) {
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this.createCode(randomCode);
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}
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/**
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* @param width 图片宽
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* @param height 图片高
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* @param randomCode 随机数
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*/
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public VerifyCodeUtil(int width, int height, String randomCode) {
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this.width = width;
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this.height = height;
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this.createCode(randomCode);
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}
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/**
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* @param width 图片宽
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* @param height 图片高
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* @param codeCount 字符个数
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* @param lineCount 干扰线条数
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* @param randomCode 随机数
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*/
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public VerifyCodeUtil(int width, int height, int codeCount, int lineCount, String randomCode) {
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this.width = width;
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this.height = height;
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this.codeCount = codeCount;
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this.lineCount = lineCount;
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this.createCode(randomCode);
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}
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public void createCode(String randomCode) {
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int x = 0, fontHeight = 0, codeY = 0;
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int red = 0, green = 0, blue = 0;
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x = width / (codeCount + 2);//每个字符的宽度
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fontHeight = height - 2;//字体的高度
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codeY = height - 4;
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// 图像buffer
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buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
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Graphics2D g = buffImg.createGraphics();
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// 生成随机数
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Random random = new Random();
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// 将图像填充为白色
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g.setColor(Color.WHITE);
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g.fillRect(0, 0, width, height);
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// 创建字体
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ImgFontByte imgFont = new ImgFontByte();
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Font font = imgFont.getFont(fontHeight);
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g.setFont(font);
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for (int i = 0; i < lineCount; i++) {
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int xs = random.nextInt(width);
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int ys = random.nextInt(height);
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int xe = xs + random.nextInt(width / 8);
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int ye = ys + random.nextInt(height / 8);
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red = random.nextInt(255);
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green = random.nextInt(255);
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blue = random.nextInt(255);
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g.setColor(new Color(red, green, blue));
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g.drawLine(xs, ys, xe, ye);
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}
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// randomCode记录随机产生的验证码
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// StringBuffer randomCode = new StringBuffer();
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// 随机产生codeCount个字符的验证码。
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for (int i = 0; i < randomCode.length(); i++) {
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String strRand = randomCode.substring(i, i + 1);
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// 产生随机的颜色值，让输出的每个字符的颜色值都将不同。
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red = random.nextInt(255);
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green = random.nextInt(255);
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blue = random.nextInt(255);
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g.setColor(new Color(red, green, blue));
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g.drawString(strRand, (i + 1) * x, codeY);
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// 将产生的四个随机数组合在一起。
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}
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}
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public void write(String path) throws IOException {
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OutputStream sos = new FileOutputStream(path);
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this.write(sos);
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}
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public void write(OutputStream sos) throws IOException {
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ImageIO.write(buffImg, "png", sos);
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sos.close();
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}
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public BufferedImage getBuffImg() {
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return buffImg;
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}
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public String getCode() {
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return code;
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}
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public static void main(String[] args) {
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VerifyCodeUtil vCode = new VerifyCodeUtil(120, 40, 5, 100, "11111");
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try {
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String path = "D:/t/" + "11.png";
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System.out.println(vCode.getCode() + " >" + path);
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vCode.write(path);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}

‎chapter6_verifycode/src/main/resources/servlet-context.xml‎

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