代码片段
发送邮件
package com.boomoom.store.utils; import java.util.Properties; import javax.mail.Authenticator; import javax.mail.Message; import javax.mail.Message.RecipientType; import javax.mail.MessagingException; import javax.mail.PasswordAuthentication; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; /** * 发送邮件的工具类: * @author admin * */ public class MailUtils { public static void sendMail(String to, String subject ,String content){ try { // 获得连接: Properties props = new Properties(); Session session = Session.getInstance(props, new Authenticator() { @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication("service@store.com", "111"); } }); // 构建邮件: Message message = new MimeMessage(session); message.setFrom(new InternetAddress("service@store.com")); // 设置收件人: // TO:收件人 CC:抄送 BCC:暗送,密送. message.addRecipient(RecipientType.TO, new InternetAddress(to)); // 主题: message.setSubject(subject); // 正文: message.setContent(context, "text/html;charset=UTF-8"); // 发送邮件: Transport.send(message); } catch (MessagingException e) { e.printStackTrace(); } } public static void main(String[] args) { MailUtils.sendMail("aaa@store.com", "sdfjklsdkljrsiduoigittery"); } }
String to Json
判断字符串是否为空，字符串是否为json
list转json用JSONArray,对象和map转json用JSONObject，JSONObject.parse/.parseObject
import com.alibaba.fastjson.JSONArray; import com.alibaba.fastjson.JSONObject; public class Util { public static boolean isJSONMessage(String textMessage) { if (isBlank(textMessage)) { return false; } try { Object Object = JSONObject.parse(textMessage); if (object instanceof JSONObject || object instanceof JSONArray) { return true; } } catch (Exception e) { } return false; } public static isBlank(String str) { int length; if ((str == null) || ((length = str.length()) == 0) ) { return false; } for (int i = 0; i < length; i++) { if (Character.isWhitespace(str.charAt(i))) { return false; } } } }
EHcache使用Demo
package com.boomoom.shop.service.impl; import java.sql.SQLException; import java.util.List; import com.boomoom.shop.dao.CategoryDao; import com.boomoom.shop.dao.impl.CategoryDaoImpl; import com.boomoom.shop.domain.Category; import com.boomoom.shop.service.CategoryService; import com.boomoom.shop.utils.BeanFactory; import net.sf.ehcache.Cache; import net.sf.ehcache.CacheManager; import net.sf.ehcache.Element; /** * 分类的Service的实现类 * @author admin * */ public class CategoryServiceImpl implements CategoryService { @Override public List<Category> findAll()throws SQLException { /** * 使用缓存优化程序,先从缓存中获取数据 * 获取到:直接返回 * 获取不到:查询数据库,将记录存入到缓存中. */ // 读取配置文件 CacheManager cacheManager = CacheManager.create(CategoryServiceImpl.class.getClassLoader().getResourceAsStream("ehcache.xml")); // 从配置文件中获取名称为categoryCache缓存区 Cache cache = cacheManager.getCache("categoryCache"); // 判断缓存中是否有list集合: Element element = cache.get("list"); List<Category> list = null; if(element == null){ // 缓存中没有数据 System.out.println("缓存中没有数据 ,查询数据库====="); // CategoryDao categoryDao = new CategoryDaoImpl(); CategoryDao categoryDao = (CategoryDao) BeanFactory.getBean("categoryDao"); list = categoryDao.findAll(); element = new Element("list",list); cache.put(element); }else{ // 缓存中已经存在数据 System.out.println("缓存中有数据 ,没有查询数据库====="); list = (List<Category>)element.getObjectValue(); } return list; } }
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../config/ehcache.xsd"> <diskStore path="C:/ehcache"/> <cache name="categoryCache" maxElementsInMemory="10000" eternal="false" timeToIdleSeconds="120" timeToLiveSeconds="120" overflowToDisk="true" maxElementsOnDisk="10000000" diskPersistent="false" diskExpiryThreadIntervalSeconds="120" memoryStoreEvictionPolicy="LRU" /> </ehcache>
生成验证码图片
package com.boomoom.store.web.servlet; import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.IOException; import java.util.Random; import javax.imageio.ImageIO; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * 生成验证码图片 * 以防浏览器缓存，可以在jsp的访问路径后跟一个任意参数(当前时间) * */ public class CheckImgServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 禁止缓存 // response.setHeader("Cache-Control", "no-cache"); // response.setHeader("Pragma", "no-cache"); // response.setDateHeader("Expires", -1); int width = 120; int height = 30; // 步骤一 绘制一张内存中图片 BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); // 步骤二 图片绘制背景颜色 ---通过绘图对象 Graphics graphics = bufferedImage.getGraphics();// 得到画图对象 --- 画笔 // 绘制任何图形之前 都必须指定一个颜色 graphics.setColor(getRandColor(200, 250)); graphics.fillRect(0, 0, width, height); // 步骤三 绘制边框 graphics.setColor(Color.WHITE); graphics.drawRect(0, 0, width - 1, height - 1); // 步骤四 四个随机数字 Graphics2D graphics2d = (Graphics2D) graphics; // 设置输出字体 graphics2d.setFont(new Font("宋体", Font.BOLD, 18)); String words = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890"; // String words = "\u7684\u4e00\u4e86\u662f\u6211\u4e0d\u5728\u4eba\u4eec\u6709\u6765\u4ed6\u8fd9\u4e0a\u7740\u4e2a\u5730\u5230\u5927\u91cc\u8bf4\u5c31\u53bb\u5b50\u5f97\u4e5f\u548c\u90a3\u8981\u4e0b\u770b\u5929\u65f6\u8fc7\u51fa\u5c0f\u4e48\u8d77\u4f60\u90fd\u628a\u597d\u8fd8\u591a\u6ca1\u4e3a\u53c8\u53ef\u5bb6\u5b66\u53ea\u4ee5\u4e3b\u4f1a\u6837\u5e74\u60f3\u751f\u540c\u8001\u4e2d\u5341\u4ece\u81ea\u9762\u524d\u5934\u9053\u5b83\u540e\u7136\u8d70\u5f88\u50cf\u89c1\u4e24\u7528\u5979\u56fd\u52a8\u8fdb\u6210\u56de\u4ec0\u8fb9\u4f5c\u5bf9\u5f00\u800c\u5df1\u4e9b\u73b0\u5c71\u6c11\u5019\u7ecf\u53d1\u5de5\u5411\u4e8b\u547d\u7ed9\u957f\u6c34\u51e0\u4e49\u4e09\u58f0\u4e8e\u9ad8\u624b\u77e5\u7406\u773c\u5fd7\u70b9\u5fc3\u6218\u4e8c\u95ee\u4f46\u8eab\u65b9\u5b9e\u5403\u505a\u53eb\u5f53\u4f4f\u542c\u9769\u6253\u5462\u771f\u5168\u624d\u56db\u5df2\u6240\u654c\u4e4b\u6700\u5149\u4ea7\u60c5\u8def\u5206\u603b\u6761\u767d\u8bdd\u4e1c\u5e2d\u6b21\u4eb2\u5982\u88ab\u82b1\u53e3\u653e\u513f\u5e38\u6c14\u4e94\u7b2c\u4f7f\u5199\u519b\u5427\u6587\u8fd0\u518d\u679c\u600e\u5b9a\u8bb8\u5feb\u660e\u884c\u56e0\u522b\u98de\u5916\u6811\u7269\u6d3b\u90e8\u95e8\u65e0\u5f80\u8239\u671b\u65b0\u5e26\u961f\u5148\u529b\u5b8c\u5374\u7ad9\u4ee3\u5458\u673a\u66f4\u4e5d\u60a8\u6bcf\u98ce\u7ea7\u8ddf\u7b11\u554a\u5b69\u4e07\u5c11\u76f4\u610f\u591c\u6bd4\u9636\u8fde\u8f66\u91cd\u4fbf\u6597\u9a6c\u54ea\u5316\u592a\u6307\u53d8\u793e\u4f3c\u58eb\u8005\u5e72\u77f3\u6ee1\u65e5\u51b3\u767e\u539f\u62ff\u7fa4\u7a76\u5404\u516d\u672c\u601d\u89e3\u7acb\u6cb3\u6751\u516b\u96be\u65e9\u8bba\u5417\u6839\u5171\u8ba9\u76f8\u7814\u4eca\u5176\u4e66\u5750\u63a5\u5e94\u5173\u4fe1\u89c9\u6b65\u53cd\u5904\u8bb0\u5c06\u5343\u627e\u4e89\u9886\u6216\u5e08\u7ed3\u5757\u8dd1\u8c01\u8349\u8d8a\u5b57\u52a0\u811a\u7d27\u7231\u7b49\u4e60\u9635\u6015\u6708\u9752\u534a\u706b\u6cd5\u9898\u5efa\u8d76\u4f4d\u5531\u6d77\u4e03\u5973\u4efb\u4ef6\u611f\u51c6\u5f20\u56e2\u5c4b\u79bb\u8272\u8138\u7247\u79d1\u5012\u775b\u5229\u4e16\u521a\u4e14\u7531\u9001\u5207\u661f\u5bfc\u665a\u8868\u591f\u6574\u8ba4\u54cd\u96ea\u6d41\u672a\u573a\u8be5\u5e76\u5e95\u6df1\u523b\u5e73\u4f1f\u5fd9\u63d0\u786e\u8fd1\u4eae\u8f7b\u8bb2\u519c\u53e4\u9ed1\u544a\u754c\u62c9\u540d\u5440\u571f\u6e05\u9633\u7167\u529e\u53f2\u6539\u5386\u8f6c\u753b\u9020\u5634\u6b64\u6cbb\u5317\u5fc5\u670d\u96e8\u7a7f\u5185\u8bc6\u9a8c\u4f20\u4e1a\u83dc\u722c\u7761\u5174\u5f62\u91cf\u54b1\u89c2\u82e6\u4f53\u4f17\u901a\u51b2\u5408\u7834\u53cb\u5ea6\u672f\u996d\u516c\u65c1\u623f\u6781\u5357\u67aa\u8bfb\u6c99\u5c81\u7ebf\u91ce\u575a\u7a7a\u6536\u7b97\u81f3\u653f\u57ce\u52b3\u843d\u94b1\u7279\u56f4\u5f1f\u80dc\u6559\u70ed\u5c55\u5305\u6b4c\u7c7b\u6e10\u5f3a\u6570\u4e61\u547c\u6027\u97f3\u7b54\u54e5\u9645\u65e7\u795e\u5ea7\u7ae0\u5e2e\u5566\u53d7\u7cfb\u4ee4\u8df3\u975e\u4f55\u725b\u53d6\u5165\u5cb8\u6562\u6389\u5ffd\u79cd\u88c5\u9876\u6025\u6797\u505c\u606f\u53e5\u533a\u8863\u822c\u62a5\u53f6\u538b\u6162\u53d4\u80cc\u7ec6"; Random random = new Random();// 生成随机数 // 强随机生成的验证码保存到session: StringBuffer buffer = new StringBuffer(); // 定义x坐标 int x = 10; for (int i = 0; i < 4; i++) { // 随机颜色 graphics2d.setColor(new Color(20 + random.nextInt(110), 20 + random .nextInt(110), 20 + random.nextInt(110))); // 旋转 -30 --- 30度 int jiaodu = random.nextInt(60) - 30; // 换算弧度 double theta = jiaodu * Math.PI / 180; // 生成一个随机数字 int index = random.nextInt(words.length()); // 生成随机数 0 到 length - 1 // 获得字母数字 char c = words.charAt(index); // 将生成汉字 加入buffer buffer.append(c); // 将c 输出到图片 graphics2d.rotate(theta, x, 20); graphics2d.drawString(String.valueOf(c), x, 20); graphics2d.rotate(-theta, x, 20); x += 30; } request.getSession().setAttribute("code", buffer.toString()); // 步骤五 绘制干扰线 graphics.setColor(getRandColor(160, 200)); int x1; int x2; int y1; int y2; for (int i = 0; i < 30; i++) { x1 = random.nextInt(width); x2 = random.nextInt(12); y1 = random.nextInt(height); y2 = random.nextInt(12); graphics.drawLine(x1, y1, x1 + x2, x2 + y2); } // 将上面图片输出到浏览器 ImageIO graphics.dispose();// 释放资源 ImageIO.write(bufferedImage, "jpg", response.getOutputStream()); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } /** * 取其某一范围的color * * @param fc * int 范围参数1 * @param bc * int 范围参数2 * @return Color */ private Color getRandColor(int fc, int bc) { // 取其随机颜色 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); } }
model的toString优化
import org.apache.commons.lang.builder.ToStringBuilder; import org.apache.commons.lang.builder.ToStringStyle; public String toString() { // SHORT_PREFIX_STYLE打印结构为类名加属性值对。 return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE); // user实体不打印passWord机密信息方法 /*return (new ReflectionToStringBuilder(this) { protected boolean accept(Field f) { return super.accept(f) && !f.getName().equals("passWord"); } }).toString();*/ }
交易的加签验签
import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.Arrays; public class PaymentUtil { private static String encodingCharset = "UTF-8"; /** * 生成hmac方法 * * @param p0_Cmd 业务类型 * @param p1_MerId 商户编号 * @param p2_Order 商户订单号 * @param p3_Amt 支付金额 * @param p4_Cur 交易币种 * @param p5_Pid 商品名称 * @param p6_Pcat 商品种类 * @param p7_Pdesc 商品描述 * @param p8_Url 商户接收支付成功数据的地址 * @param p9_SAF 送货地址 * @param pa_MP 商户扩展信息 * @param pd_FrpId 银行编码 * @param pr_NeedResponse 应答机制 * @param keyValue 商户密钥 * @return */ public static String buildHmac(String p0_Cmd,String p1_MerId, String p2_Order, String p3_Amt, String p4_Cur,String p5_Pid, String p6_Pcat, String p7_Pdesc,String p8_Url, String p9_SAF,String pa_MP,String pd_FrpId, String pr_NeedResponse,String keyValue) { StringBuilder sValue = new StringBuilder(); // 业务类型 sValue.append(p0_Cmd); // 商户编号 sValue.append(p1_MerId); // 商户订单号 sValue.append(p2_Order); // 支付金额 sValue.append(p3_Amt); // 交易币种 sValue.append(p4_Cur); // 商品名称 sValue.append(p5_Pid); // 商品种类 sValue.append(p6_Pcat); // 商品描述 sValue.append(p7_Pdesc); // 商户接收支付成功数据的地址 sValue.append(p8_Url); // 送货地址 sValue.append(p9_SAF); // 商户扩展信息 sValue.append(pa_MP); // 银行编码 sValue.append(pd_FrpId); // 应答机制 sValue.append(pr_NeedResponse); return PaymentUtil.hmacSign(sValue.toString(), keyValue); } /** * 返回校验hmac方法 * * @param hmac 支付网关发来的加密验证码 * @param p1_MerId 商户编号 * @param r0_Cmd 业务类型 * @param r1_Code 支付结果 * @param r2_TrxId 易宝支付交易流水号 * @param r3_Amt 支付金额 * @param r4_Cur 交易币种 * @param r5_Pid 商品名称 * @param r6_Order 商户订单号 * @param r7_Uid 易宝支付会员ID * @param r8_MP 商户扩展信息 * @param r9_BType 交易结果返回类型 * @param keyValue 密钥 * @return */ public static boolean verifyCallback(String hmac, String p1_MerId, String r0_Cmd, String r1_Code, String r2_TrxId, String r3_Amt, String r4_Cur, String r5_Pid, String r6_Order, String r7_Uid, String r8_MP, String r9_BType, String keyValue) { StringBuilder sValue = new StringBuilder(); // 商户编号 sValue.append(p1_MerId); // 业务类型 sValue.append(r0_Cmd); // 支付结果 sValue.append(r1_Code); // 易宝支付交易流水号 sValue.append(r2_TrxId); // 支付金额 sValue.append(r3_Amt); // 交易币种 sValue.append(r4_Cur); // 商品名称 sValue.append(r5_Pid); // 商户订单号 sValue.append(r6_Order); // 易宝支付会员ID sValue.append(r7_Uid); // 商户扩展信息 sValue.append(r8_MP); // 交易结果返回类型 sValue.append(r9_BType); String sNewString = PaymentUtil.hmacSign(sValue.toString(), keyValue); return sNewString.equals(hmac); } /** * @param aValue * @param aKey * @return */ public static String hmacSign(String aValue, String aKey) { byte k_ipad[] = new byte[64]; byte k_opad[] = new byte[64]; byte keyb[]; byte value[]; try { keyb = aKey.getBytes(encodingCharset); value = aValue.getBytes(encodingCharset); } catch (UnsupportedEncodingException e) { keyb = aKey.getBytes(); value = aValue.getBytes(); } Arrays.fill(k_ipad, keyb.length, 64, (byte) 54); Arrays.fill(k_opad, keyb.length, 64, (byte) 92); for (int i = 0; i < keyb.length; i++) { k_ipad[i] = (byte) (keyb[i] ^ 0x36); k_opad[i] = (byte) (keyb[i] ^ 0x5c); } MessageDigest md = null; try { md = MessageDigest.getInstance("MD5"); } catch (NoSuchAlgorithmException e) { return null; } md.update(k_ipad); md.update(value); byte dg[] = md.digest(); md.reset(); md.update(k_opad); md.update(dg, 0, 16); dg = md.digest(); return toHex(dg); } public static String toHex(byte input[]) { if (input == null) return null; StringBuffer output = new StringBuffer(input.length * 2); for (int i = 0; i < input.length; i++) { int current = input[i] & 0xff; if (current < 16) output.append("0"); output.append(Integer.toString(current, 16)); } return output.toString(); } /** * * @param args * @param key * @return */ public static String getHmac(String[] args, String key) { if (args == null || args.length == 0) { return (null); } StringBuffer str = new StringBuffer(); for (int i = 0; i < args.length; i++) { str.append(args[i]); } return (hmacSign(str.toString(), key)); } /** * @param aValue * @return */ public static String digest(String aValue) { aValue = aValue.trim(); byte value[]; try { value = aValue.getBytes(encodingCharset); } catch (UnsupportedEncodingException e) { value = aValue.getBytes(); } MessageDigest md = null; try { md = MessageDigest.getInstance("SHA"); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); return null; } return toHex(md.digest(value)); } // public static void main(String[] args) { // System.out.println(hmacSign("AnnulCard1000043252120080620160450.0http://localhost/SZXpro/callback.asp杩?4564868265473623778348682654736324511","8UPp0KE8sq73zVP370vko7C39403rtK1YwX40Td6irH216036H27Eb12792t")); // } }
MD5
package com.boomoom.store.utils; import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.Collection; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class MD5 { private static Logger log = LoggerFactory.getLogger(MD5.class); public static MessageDigest md; static { try { md = MessageDigest.getInstance("MD5"); } catch (NoSuchAlgorithmException e) { log.error("MD5 加密算法加载出错", e); } } /** * 编码 * * @param str * @return */ public static String encode(String str) { if (str == null) throw new NullPointerException(); if ("".equals(str)) return ""; md.reset(); md.update(str.getBytes()); byte[] t = md.digest(); StringBuilder result = new StringBuilder(); int ti; for (int i = 0; i < t.length; i++) result.append((ti = t[i] & 0xff) <= 0xF ? "0" + Integer.toString(ti, 16) : Integer.toString(ti, 16)); return result.toString(); } /** * * @param str * @param charset * @return */ public static String encode(String str,String charset) { if (str == null) throw new NullPointerException(); if ("".equals(str)) return ""; md.reset(); try { md.update(str.getBytes(charset)); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } byte[] t = md.digest(); StringBuilder result = new StringBuilder(); int ti; for (int i = 0; i < t.length; i++) result.append((ti = t[i] & 0xff) <= 0xF ? "0" + Integer.toString(ti, 16) : Integer.toString(ti, 16)); return result.toString(); } public static String checkMD5(String mchntCd, String mchntKey, Collection<String> list) { StringBuilder md5 = new StringBuilder(); md5.append(mchntCd); for (String val : list) { md5.append("|"); if (val != null) md5.append(val); } md5.append("|"); md5.append(mchntKey); log.debug("加密内容为：[" + md5.toString() + "]"); return MD5.encode(md5.toString()); } /** * @param args */ public static void main(String[] args) { //明文 System.out.println(MD5.encode("1sdf_6"));//202cb962ac59075b964b07152d234b70 密文 // 密码一定是密文的 } }
代码日常
功能-->安全-->性能
1、在注册码激活时，拿传过来的code去query一下user，再判断非空，走update。那可以简化为直接拿传过来的code去upade，根据update发回的0/1，再走判断。
2、缓存在应用启动时加载，可以使用监听器。
