Java常用工具类_赵广陆

网络 02-07 1599

目录 1 获取使用者操作系统和游览器版本信息2 获取使用者ip地址3 身份证验证工具类4 雪花id生成用于文件名5 名字转拼音6 忽略BeanUtil字段7 通过身份证号码获取出生日期、性别、年龄8 map与url参数转换9 java以逗号为分割符拼接字符串的技巧

以下工具类收集与网上,但是都是实际应用于项目当中经过检验和优化的,拿来直接使用没有什么问题

1 获取使用者操作系统和游览器版本信息 /** * @author oldlu * @version 1.0 * @date 2021/10/20 0020 15:17 */ public class IPUtil { /** * 获取操作系统,浏览器及浏览器版本信息 * @param request * @return */ public static List<String> getOsAndBrowserInfo(HttpServletRequest request){ String browserDetails = request.getHeader("User-Agent"); String userAgent = browserDetails; String user = userAgent.toLowerCase(); String os = ""; String browser = ""; //=================OS Info======================= if (userAgent.toLowerCase().indexOf("windows") >= 0 ) { os = "Windows"; } else if(userAgent.toLowerCase().indexOf("mac") >= 0) { os = "Mac"; } else if(userAgent.toLowerCase().indexOf("x11") >= 0) { os = "Unix"; } else if(userAgent.toLowerCase().indexOf("android") >= 0) { os = "Android"; } else if(userAgent.toLowerCase().indexOf("iphone") >= 0) { os = "IPhone"; }else{ os = "UnKnown, More-Info: "+userAgent; } //===============Browser=========================== if (user.contains("edge")) { browser=(userAgent.substring(userAgent.indexOf("Edge")).split(" ")[0]).replace("/", "-"); } else if (user.contains("msie")) { String substring=userAgent.substring(userAgent.indexOf("MSIE")).split(";")[0]; browser=substring.split(" ")[0].replace("MSIE", "IE")+"-"+substring.split(" ")[1]; } else if (user.contains("safari") && user.contains("version")) { browser=(userAgent.substring(userAgent.indexOf("Safari")).split(" ")[0]).split("/")[0] + "-" +(userAgent.substring(userAgent.indexOf("Version")).split(" ")[0]).split("/")[1]; } else if ( user.contains("opr") || user.contains("opera")) { if(user.contains("opera")){ browser=(userAgent.substring(userAgent.indexOf("Opera")).split(" ")[0]).split("/")[0] +"-"+(userAgent.substring(userAgent.indexOf("Version")).split(" ")[0]).split("/")[1]; }else if(user.contains("opr")){ browser=((userAgent.substring(userAgent.indexOf("OPR")).split(" ")[0]).replace("/", "-")) .replace("OPR", "Opera"); } } else if (user.contains("chrome")) { browser=(userAgent.substring(userAgent.indexOf("Chrome")).split(" ")[0]).replace("/", "-"); } else if ((user.indexOf("mozilla/7.0") > -1) || (user.indexOf("netscape6") != -1) || (user.indexOf("mozilla/4.7") != -1) || (user.indexOf("mozilla/4.78") != -1) || (user.indexOf("mozilla/4.08") != -1) || (user.indexOf("mozilla/3") != -1) ) { browser = "Netscape-?"; } else if (user.contains("firefox")) { browser=(userAgent.substring(userAgent.indexOf("Firefox")).split(" ")[0]).replace("/", "-"); } else if(user.contains("rv")) { String IEVersion = (userAgent.substring(userAgent.indexOf("rv")).split(" ")[0]).replace("rv:", "-"); browser="IE" + IEVersion.substring(0,IEVersion.length() - 1); } else { browser = "UnKnown, More-Info: "+userAgent; } List<String> strings=new ArrayList<>(); strings.add(os); strings.add(browser); return strings; } } 2 获取使用者ip地址 /** * 获取IP方法 * * @author ruoyi */ public class IpUtils { public static String getIpAddr(HttpServletRequest request) { if (request == null) { return "unknown"; } String ip = request.getHeader("x-forwarded-for"); if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("Proxy-Client-IP"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("X-Forwarded-For"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("WL-Proxy-Client-IP"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("X-Real-IP"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getRemoteAddr(); } return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : HtmlUtil.cleanHtmlTag(ip); } public static boolean internalIp(String ip) { byte[] addr = textToNumericFormatV4(ip); return internalIp(addr) || "127.0.0.1".equals(ip); } private static boolean internalIp(byte[] addr) { if (Validator.isNull(addr) || addr.length < 2) { return true; } final byte b0 = addr[0]; final byte b1 = addr[1]; // 10.x.x.x/8 final byte SECTION_1 = 0x0A; // 172.16.x.x/12 final byte SECTION_2 = (byte) 0xAC; final byte SECTION_3 = (byte) 0x10; final byte SECTION_4 = (byte) 0x1F; // 192.168.x.x/16 final byte SECTION_5 = (byte) 0xC0; final byte SECTION_6 = (byte) 0xA8; switch (b0) { case SECTION_1: return true; case SECTION_2: if (b1 >= SECTION_3 && b1 <= SECTION_4) { return true; } case SECTION_5: switch (b1) { case SECTION_6: return true; } default: return false; } } /** * 将IPv4地址转换成字节 * * @param text IPv4地址 * @return byte 字节 */ public static byte[] textToNumericFormatV4(String text) { if (text.length() == 0) { return null; } byte[] bytes = new byte[4]; String[] elements = text.split("\\.", -1); try { long l; int i; switch (elements.length) { case 1: l = Long.parseLong(elements[0]); if ((l < 0L) || (l > 4294967295L)) { return null; } bytes[0] = (byte) (int) (l >> 24 & 0xFF); bytes[1] = (byte) (int) ((l & 0xFFFFFF) >> 16 & 0xFF); bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF); bytes[3] = (byte) (int) (l & 0xFF); break; case 2: l = Integer.parseInt(elements[0]); if ((l < 0L) || (l > 255L)) { return null; } bytes[0] = (byte) (int) (l & 0xFF); l = Integer.parseInt(elements[1]); if ((l < 0L) || (l > 16777215L)) { return null; } bytes[1] = (byte) (int) (l >> 16 & 0xFF); bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF); bytes[3] = (byte) (int) (l & 0xFF); break; case 3: for (i = 0; i < 2; ++i) { l = Integer.parseInt(elements[i]); if ((l < 0L) || (l > 255L)) { return null; } bytes[i] = (byte) (int) (l & 0xFF); } l = Integer.parseInt(elements[2]); if ((l < 0L) || (l > 65535L)) { return null; } bytes[2] = (byte) (int) (l >> 8 & 0xFF); bytes[3] = (byte) (int) (l & 0xFF); break; case 4: for (i = 0; i < 4; ++i) { l = Integer.parseInt(elements[i]); if ((l < 0L) || (l > 255L)) { return null; } bytes[i] = (byte) (int) (l & 0xFF); } break; default: return null; } } catch (NumberFormatException e) { return null; } return bytes; } public static String getHostIp() { try { return InetAddress.getLocalHost().getHostAddress(); } catch (UnknownHostException e) { } return "127.0.0.1"; } public static String getHostName() { try { return InetAddress.getLocalHost().getHostName(); } catch (UnknownHostException e) { } return "未知"; } } 3 身份证验证工具类 /** *身份证验证 * @param idStr * @return */ public static String IdentityCardVerification(String idStr){ String[] wf = { "1", "0", "x", "9", "8", "7", "6", "5", "4", "3", "2" }; String[] checkCode = { "7", "9", "10", "5", "8", "4", "2", "1", "6", "3", "7", "9", "10", "5", "8", "4", "2" }; String iDCardNo = ""; try { //判断号码的长度 15位或18位 if (idStr.length() != 15 && idStr.length() != 18) { return "身份证号码长度应该为15位或18位"; } if (idStr.length() == 18) { iDCardNo = idStr.substring(0, 17); } else if (idStr.length() == 15) { iDCardNo = idStr.substring(0, 6) + "19" + idStr.substring(6, 15); } if (isStrNum(iDCardNo) == false) { return "身份证15位号码都应为数字;18位号码除最后一位外,都应为数字"; } //判断出生年月 String strYear = iDCardNo.substring(6, 10);// 年份 String strMonth = iDCardNo.substring(10, 12);// 月份 String strDay = iDCardNo.substring(12, 14);// 月份 if (isStrDate(strYear + "-" + strMonth + "-" + strDay) == false) { return "身份证生日无效"; } GregorianCalendar gc = new GregorianCalendar(); SimpleDateFormat s = new SimpleDateFormat("yyyy-MM-dd"); if ((gc.get(Calendar.YEAR) - Integer.parseInt(strYear)) > 150 || (gc.getTime().getTime() - s.parse(strYear + "-" + strMonth + "-" + strDay).getTime()) < 0) { return "身份证生日不在有效范围"; } if (Integer.parseInt(strMonth) > 12 || Integer.parseInt(strMonth) == 0) { return "身份证月份无效"; } if (Integer.parseInt(strDay) > 31 || Integer.parseInt(strDay) == 0) { return "身份证日期无效"; } //判断地区码 Hashtable h = GetAreaCode(); if (h.get(iDCardNo.substring(0, 2)) == null) { return "身份证地区编码错误"; } //判断最后一位 int theLastOne = 0; for (int i = 0; i < 17; i++) { theLastOne = theLastOne + Integer.parseInt(String.valueOf(iDCardNo.charAt(i))) * Integer.parseInt(checkCode[i]); } int modValue = theLastOne % 11; String strVerifyCode = wf[modValue]; iDCardNo = iDCardNo + strVerifyCode; if (idStr.length() == 18 &&!iDCardNo.equals(idStr)) { return "身份证无效，不是合法的身份证号码"; } }catch (Exception e){ e.printStackTrace(); } return "200"; } public static void main(String[] args) { String s = JunitIDCardUtil.IdentityCardVerification("3704811991065550000000"); System.out.println(s); } /** * 地区代码 * @return Hashtable */ private static Hashtable GetAreaCode() { Hashtable hashtable = new Hashtable(); hashtable.put("11", "北京"); hashtable.put("12", "天津"); hashtable.put("13", "河北"); hashtable.put("14", "山西"); hashtable.put("15", "内蒙古"); hashtable.put("21", "辽宁"); hashtable.put("22", "吉林"); hashtable.put("23", "黑龙江"); hashtable.put("31", "上海"); hashtable.put("32", "江苏"); hashtable.put("33", "浙江"); hashtable.put("34", "安徽"); hashtable.put("35", "福建"); hashtable.put("36", "江西"); hashtable.put("37", "山东"); hashtable.put("41", "河南"); hashtable.put("42", "湖北"); hashtable.put("43", "湖南"); hashtable.put("44", "广东"); hashtable.put("45", "广西"); hashtable.put("46", "海南"); hashtable.put("50", "重庆"); hashtable.put("51", "四川"); hashtable.put("52", "贵州"); hashtable.put("53", "云南"); hashtable.put("54", "西藏"); hashtable.put("61", "陕西"); hashtable.put("62", "甘肃"); hashtable.put("63", "青海"); hashtable.put("64", "宁夏"); hashtable.put("65", "新疆"); hashtable.put("71", "台湾"); hashtable.put("81", "香港"); hashtable.put("82", "澳门"); hashtable.put("91", "国外"); return hashtable; } /** * 判断字符串是否为数字 * @param str * @return */ private static boolean isStrNum(String str) { Pattern pattern = Pattern.compile("[0-9]*"); Matcher isNum = pattern.matcher(str); if (isNum.matches()) { return true; } else { return false; } } /** * 判断字符串是否为日期格式 * @param strDate * @return */ public static boolean isStrDate(String strDate) { Pattern pattern = Pattern.compile("^((\\d{2}(([02468][048])|([13579][26]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][1235679])|([13579][01345789]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(\\s(((0?[0-9])|([1-2][0-3]))\\:([0-5]?[0-9])((\\s)|(\\:([0-5]?[0-9])))))?$"); Matcher m = pattern.matcher(strDate); if (m.matches()) { return true; } else { return false; } } 4 雪花id生成用于文件名 public class SnowflakeIdUtils { // ==============================Fields=========================================== private final long twepoch = 1420041600000L; /** 机器id所占的位数 */ private final long workerIdBits = 5L; /** 数据标识id所占的位数 */ private final long datacenterIdBits = 5L; /** 支持的最大机器id，结果是31 (这个移位算法可以很快的计算出几位二进制数所能表示的最大十进制数) */ private final long maxWorkerId = -1L ^ (-1L << workerIdBits); /** 支持的最大数据标识id，结果是31 */ private final long maxDatacenterId = -1L ^ (-1L << datacenterIdBits); /** 序列在id中占的位数 */ private final long sequenceBits = 12L; /** 机器ID向左移12位 */ private final long workerIdShift = sequenceBits; /** 数据标识id向左移17位(12+5) */ private final long datacenterIdShift = sequenceBits + workerIdBits; /** 时间截向左移22位(5+5+12) */ private final long timestampLeftShift = sequenceBits + workerIdBits + datacenterIdBits; /** 生成序列的掩码，这里为4095 (0b111111111111=0xfff=4095) */ private final long sequenceMask = -1L ^ (-1L << sequenceBits); /** 工作机器ID(0~31) */ private long workerId; /** 数据中心ID(0~31) */ private long datacenterId; /** 毫秒内序列(0~4095) */ private long sequence = 0L; /** 上次生成ID的时间截 */ private long lastTimestamp = -1L; //==============================Constructors===================================== /** * 构造函数 * @param workerId 工作ID (0~31) * @param datacenterId 数据中心ID (0~31) */ public SnowflakeIdUtils(long workerId, long datacenterId) { if (workerId > maxWorkerId || workerId < 0) { throw new IllegalArgumentException(String.format("worker Id can't be greater than %d or less than 0", maxWorkerId)); } if (datacenterId > maxDatacenterId || datacenterId < 0) { throw new IllegalArgumentException(String.format("datacenter Id can't be greater than %d or less than 0", maxDatacenterId)); } this.workerId = workerId; this.datacenterId = datacenterId; } // ==============================Methods========================================== /** * 获得下一个ID (该方法是线程安全的) * @return SnowflakeId */ public synchronized long nextId() { long timestamp = timeGen(); //如果当前时间小于上一次ID生成的时间戳，说明系统时钟回退过这个时候应当抛出异常 if (timestamp < lastTimestamp) { throw new RuntimeException( String.format("Clock moved backwards. Refusing to generate id for %d milliseconds", lastTimestamp - timestamp)); } //如果是同一时间生成的，则进行毫秒内序列 if (lastTimestamp == timestamp) { sequence = (sequence + 1) & sequenceMask; //毫秒内序列溢出 if (sequence == 0) { //阻塞到下一个毫秒,获得新的时间戳 timestamp = tilNextMillis(lastTimestamp); } } //时间戳改变，毫秒内序列重置 else { sequence = 0L; } //上次生成ID的时间截 lastTimestamp = timestamp; //移位并通过或运算拼到一起组成64位的ID return ((timestamp - twepoch) << timestampLeftShift) // | (datacenterId << datacenterIdShift) // | (workerId << workerIdShift) // | sequence; } /** * 阻塞到下一个毫秒，直到获得新的时间戳 * @param lastTimestamp 上次生成ID的时间截 * @return 当前时间戳 */ protected long tilNextMillis(long lastTimestamp) { long timestamp = timeGen(); while (timestamp <= lastTimestamp) { timestamp = timeGen(); } return timestamp; } /** * 返回以毫秒为单位的当前时间 * @return 当前时间(毫秒) */ protected long timeGen() { return System.currentTimeMillis(); } //==============================Test============================================= /** 测试 */ public static void main(String[] args) { // com.ruoyi.common.utils.SnowflakeIdUtils idWorker = new com.ruoyi.common.utils.SnowflakeIdUtils(3, 1); // System.out.println(idWorker.nextId()); } } 5 名字转拼音 import net.sourceforge.pinyin4j.PinyinHelper; import net.sourceforge.pinyin4j.format.HanyuPinyinCaseType; import net.sourceforge.pinyin4j.format.HanyuPinyinOutputFormat; import net.sourceforge.pinyin4j.format.HanyuPinyinToneType; import net.sourceforge.pinyin4j.format.HanyuPinyinVCharType; import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination; public class PinYinUtil { /** * @param china (字符串汉字) * @return 汉字转拼音其它字符不变 */ public static String getPinyin(String china){ HanyuPinyinOutputFormat formart = new HanyuPinyinOutputFormat(); formart.setCaseType(HanyuPinyinCaseType.LOWERCASE); formart.setToneType(HanyuPinyinToneType.WITHOUT_TONE); formart.setVCharType(HanyuPinyinVCharType.WITH_V); char[] arrays = china.trim().toCharArray(); String result = ""; try { for (int i=0;i<arrays.length;i++) { char ti = arrays[i]; if(Character.toString(ti).matches("[\\u4e00-\\u9fa5]")){ //匹配是否是中文 String[] temp = PinyinHelper.toHanyuPinyinStringArray(ti,formart); result += temp[0]; }else{ result += ti; } } } catch (BadHanyuPinyinOutputFormatCombination e) { e.printStackTrace(); } return result; } } 6 忽略BeanUtil字段 /** * @author oldlu * @version 1.0 * @date 2021/4/21 0021 8:33 */ public class BeanUtilsIgnore { public static String[] getNullPropertyNames (Object source) { final BeanWrapper src = new BeanWrapperImpl(source); PropertyDescriptor[] pds = src.getPropertyDescriptors(); Set<String> emptyNames = new HashSet<String>(); for(PropertyDescriptor pd : pds) { Object srcValue = src.getPropertyValue(pd.getName()); if (srcValue == null) emptyNames.add(pd.getName()); } String[] result = new String[emptyNames.size()]; return emptyNames.toArray(result); } } 7 通过身份证号码获取出生日期、性别、年龄 /** * @author oldlu * @version 1.0 * @date 2022/2/22 0022 10:42 */ public class IdcardUtil { /** * 通过身份证号码获取出生日期、性别、年龄 * @param certificateNo * @return 返回的出生日期格式：1990-01-01 性别格式：0-男，1-女 */ public static Map<String, String> getBirAgeSex(String certificateNo) { String birthday = ""; String age = ""; String sexCode = ""; int year = Calendar.getInstance().get(Calendar.YEAR); char[] number = certificateNo.toCharArray(); boolean flag = true; if (number.length == 15) { for (int x = 0; x < number.length; x++) { if (!flag) { return new HashMap<String, String>(); } flag = Character.isDigit(number[x]); } } else if (number.length == 18) { for (int x = 0; x < number.length - 1; x++) { if (!flag) { return new HashMap<String, String>(); } flag = Character.isDigit(number[x]); } } if (flag && certificateNo.length() == 15) { birthday = "19" + certificateNo.substring(6, 8) + "-" + certificateNo.substring(8, 10) + "-" + certificateNo.substring(10, 12); sexCode = Integer.parseInt(certificateNo.substring(certificateNo.length() - 3, certificateNo.length())) % 2 == 0 ? "1" : "0"; age = (year - Integer.parseInt("19" + certificateNo.substring(6, 8))) + ""; } else if (flag && certificateNo.length() == 18) { birthday = certificateNo.substring(6, 10) + "-" + certificateNo.substring(10, 12) + "-" + certificateNo.substring(12, 14); sexCode = Integer.parseInt(certificateNo.substring(certificateNo.length() - 4, certificateNo.length() - 1)) % 2 == 0 ? "1" : "0"; age = (year - Integer.parseInt(certificateNo.substring(6, 10))) + ""; } Map<String, String> map = new HashMap<String, String>(); map.put("birthday", birthday); map.put("age", age); map.put("sexCode", sexCode); return map; } // public static void main(String[] args) { // Map<String, String> birAgeSex = IdcardUtil.getBirAgeSex("370822197206100427"); // System.out.println(birAgeSex); // } } 8 map与url参数转换 /** * map 与 url参数转换 */ public class MapUrlParamsUtils { public static Map<String, Object> checkParams(Map<String, Object> oldParams) { Map<String, Object> params = new HashMap<>(); for (String key : oldParams.keySet()) { if (null == oldParams.get(key)) { continue; } else { params.put(key, oldParams.get(key)); } } return params; } /** * 将url参数转换成map * * @param param aa=11&bb=22&cc=33 * @return */ public static Map<String, Object> getUrlParams(String param) { Map<String, Object> map = new HashMap<String, Object>(0); if (StringUtils.isBlank(param)) { return map; } String[] params = param.split("&"); for (int i = 0; i < params.length; i++) { String[] p = params[i].split("="); if (p.length == 2) { map.put(p[0], p[1]); } } return map; } /** * 将map转换成url * * @param map * @return */ public static String getUrlParamsByMap(Map<String, Object> map) { if (map == null) { return ""; } StringBuffer sb = new StringBuffer(); for (Map.Entry<String, Object> entry : map.entrySet()) { sb.append(entry.getKey() + "=" + entry.getValue()); sb.append("&"); } String s = sb.toString(); if (s.endsWith("&")) { s = StringUtils.substringBeforeLast(s, "&"); } return s; } } 9 java以逗号为分割符拼接字符串的技巧

答：

不用那么多if判断，让人思维混乱，直接到最后使用deleteCharAt方法去除最后一个逗号即可。

实现代码如下所示：

StringBuffer sb = new StringBuffer(); for (String str: list) { sb.append(str).append(","); } String keywordStr = sb.deleteCharAt(sb.length() - 1).toString();