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Commit 1e7cd2a

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[add] 验证码生成工具类和常用方法工具类
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‎README.md

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10. 计划任务(定时任务)`Scheduled`
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11. 第三方接口调用`RestTemplate`
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12. 常用配置(见application.properties)
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13. 随机验证码生成`VerifyCodeUtils`
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### 更多内容,持续更新
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#### More
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更多内容,持续更新,感谢`Star`
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更多内容,持续更新,感谢支持!
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package demo.web.controller;
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import demo.web.utils.VerifyCodeUtils;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.http.HttpHeaders;
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import org.springframework.http.MediaType;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RestController;
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import javax.imageio.ImageIO;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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import java.awt.image.BufferedImage;
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import java.io.IOException;
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/**
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* parent
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* demo.web.controller
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* 随机验证码图片
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* header相关说明:https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Headers
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*
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* @author BlueDriver
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* @email cpwu@foxmail.com
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* @date 2019年04月03日 14:47 Wednesday
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*/
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@RestController
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public class VerifyCodeController {
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@Autowired
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private VerifyCodeUtils verifyCodeUtils;
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/**
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* 验证码长度
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*/
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private int codeLength = 5;
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/**
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* 生成随机验证码
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* http://localhost:8080/random
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*/
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@GetMapping("/random")
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public void randomCode(HttpServletResponse response, HttpSession session) throws IOException {
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String code = verifyCodeUtils.getRandomNum(codeLength);
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//将code存入session,用于后期校验
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session.setAttribute("code", code);
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BufferedImage image = verifyCodeUtils.getImage(code);
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response.setContentType(MediaType.IMAGE_JPEG_VALUE);
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response.setDateHeader(HttpHeaders.EXPIRES, -1L);
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response.setHeader(HttpHeaders.CACHE_CONTROL, "no-cache");//http 1.1
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response.setHeader(HttpHeaders.PRAGMA, "no-cache");//http 1.0
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//将图片写入响应输出流
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ImageIO.write(image, "jpg", response.getOutputStream());
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}
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}
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package demo.web.utils;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.stereotype.Service;
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import sun.misc.BASE64Encoder;
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import javax.servlet.http.HttpServletRequest;
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import java.io.UnsupportedEncodingException;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.UUID;
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/**
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* parent
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* demo.web.utils
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*
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* @author BlueDriver
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* @email cpwu@foxmail.com
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* @date 2019年04月03日 15:09 Wednesday
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*/
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@Service
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@Slf4j
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public class CommonUtils {
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private static MessageDigest md5 = null;
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private static final BASE64Encoder base64en = new BASE64Encoder();
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static {
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try {
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md5 = MessageDigest.getInstance("MD5");
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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log.error("md5 init error", e);
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}
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}
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/**
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* md5编码加密
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*
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* @param sourceString: 需要被加密的文本
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* @return 加密后的文本
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* @throws UnsupportedEncodingException
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*/
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public String encodeByMd5(String sourceString) throws UnsupportedEncodingException {
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return base64en.encode(md5.digest(sourceString.getBytes("UTF-8")));
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}
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private static SimpleDateFormat sdfFull = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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public String getFormatDateTimeNow() {
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return sdfFull.format(System.currentTimeMillis());
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}
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public String getFormatDateTime(Date date) {
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return sdfFull.format(date);
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}
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/**
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* 格式化时间戳
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*
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* @param timeStamp
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*/
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public String getFormatDateTimeByTimeStamp(long timeStamp) {
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return sdfFull.format(timeStamp);
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}
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private static SimpleDateFormat sdfDate = new SimpleDateFormat("yyyy-MM-dd");
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/**
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* <P>将年月日字符串转成Date </p>
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*
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* @param dateString: 合乎规范的年月日字符串
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* @return Date
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*/
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public Date getDateByDateString(String dateString) {
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if (dateString == null) {
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return null;
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}
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Date date;
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try {
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date = sdfDate.parse(dateString);
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} catch (ParseException e) {
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date = null;
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}
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return date;
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}
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public String getDateStringByDate(Date date) {
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if (date == null) {
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return null;
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}
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return sdfDate.format(date);
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}
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public Long getLongByDate(Date date) {
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if (date == null) return null;
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return date.getTime();
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}
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/**
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* 生成32位的UUID
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* 8-4-4-4-12
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*/
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public String getUUID() {
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return UUID.randomUUID().toString().replace("-", "");
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}
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/**
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* <P>计算两个日期相隔天数 </p>
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*
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* @param before: 起始日期; then: 目标日期
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* @return 整数天
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*/
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public int getDifferenceDay(Date before, Date then) {
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Calendar last_c = Calendar.getInstance();
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last_c.setTime(before);
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Calendar now_c = Calendar.getInstance();
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now_c.setTime(then);
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int last_year = last_c.get(Calendar.YEAR);
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int now_year = now_c.get(Calendar.YEAR);
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if (last_year == now_year) {//the same year
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return now_c.get(Calendar.DAY_OF_YEAR) - last_c.get(Calendar.DAY_OF_YEAR);
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} else {
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//different year
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long length = then.getTime() - before.getTime();
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return (int) length / (1000 * 3600 * 24);
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}
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}
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/**
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* 获取request的IP地址
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*
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* @param request
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* @return IP address
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*/
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public String getIP(HttpServletRequest request) {
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String ip = request.getHeader("X-real-ip");//先从nginx自定义配置获取
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
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ip = request.getHeader("x-forwarded-for");
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}
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
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ip = request.getHeader("Proxy-Client-IP");
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}
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
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ip = request.getHeader("WL-Proxy-Client-IP");
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}
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
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ip = request.getRemoteAddr();
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}
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return ip;
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}
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}
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package demo.web.utils;
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import org.springframework.stereotype.Service;
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import java.awt.*;
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import java.awt.image.BufferedImage;
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import java.util.Random;
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import java.util.concurrent.ThreadLocalRandom;
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/**
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* parent
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* demo.web.utils
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* 随机验证码生成工具类
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*
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* @author BlueDriver
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* @email cpwu@foxmail.com
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* @date 2019年04月03日 14:39 Wednesday
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*/
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@Service
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public class VerifyCodeUtils {
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/**
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* 宽度
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*/
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private static final int WIDTH = 250;
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/**
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* 高度
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*/
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private static final int HEIGHT = 100;
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/**
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* 根据code生成图片
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*/
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public BufferedImage getImage(String code) {
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BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_BGR);
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Graphics g = image.getGraphics();
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drawBackground(g, Color.WHITE);
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drawBorder(g, Color.BLUE);
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drawRandomLine(g, code.length() * 4);
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drawRandomNumber((Graphics2D) g, code);
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return image;
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}
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/**
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* 绘制背景色
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*/
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private void drawBackground(Graphics g, Color color) {
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g.setColor(color);
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g.fillRect(0, 0, WIDTH, HEIGHT);
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}
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/**
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* 绘制边框
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*/
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private void drawBorder(Graphics g, Color color) {
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g.setColor(color);
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g.drawRect(0, 0, WIDTH - 1, HEIGHT - 1);
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}
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/**
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* 绘制随机干扰线
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*/
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private void drawRandomLine(Graphics g, int lineCount) {
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Random random = new Random();
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for (int i = 1; i <= lineCount; i++) {
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g.setColor(getRandomColor());
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int x1 = random.nextInt(WIDTH);
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int y1 = random.nextInt(HEIGHT);
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int x2 = random.nextInt(WIDTH);
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int y2 = random.nextInt(HEIGHT);
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g.drawLine(x1, y1, x2, y2);
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}
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}
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/**
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* 绘制随机数
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*/
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private void drawRandomNumber(Graphics2D g, String code) {
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// chinese [\u4e00-\u9f5a]
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g.setFont(new Font(Font.SANS_SERIF, Font.ITALIC, HEIGHT / 4 * 3));// linux: fc -list; win7: cmd
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// fonts
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int x = HEIGHT / 8;
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int y = HEIGHT / 2 + HEIGHT / 4;
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char[] num = code.toCharArray();
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for (char c : num) {
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g.setColor(getRandomColor());
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int d = new Random().nextInt() % 30;
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g.rotate(d * Math.PI / 180, x, y);
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g.drawString(c + "", x, y);
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g.rotate(-d * Math.PI / 180, x, y);
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x += WIDTH / (code.length() + 1);
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}
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}
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/**
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* 随机色
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*/
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public Color getRandomColor() {
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return new Color(getRandomInt(255), getRandomInt(255), getRandomInt(255));
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}
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/**
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* 获取指定长度的随机整数
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*/
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public String getRandomNum(int length) {
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StringBuffer sb = new StringBuffer();
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for (int i = 0; i < length; i++) {
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sb.append(getRandomInt(10));
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}
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return sb.toString();
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}
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/**
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* 获得指定范围内的随机整数,左开右闭[)
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*/
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public int getRandomInt(int bound) {
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ThreadLocalRandom random = ThreadLocalRandom.current();
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return random.nextInt(bound);
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}
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}

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