java开发常用工具类集合总结

转自：https://blog.csdn.net/wu1226419614/article/details/72673686 

1）java正则表达式的匹配包括：邮箱，手机，姓名，昵称，身份证号，银行卡号等；

2）生成6位随机数；

3）对url中字符串进行编码和解码

4）获取客户端ip地址

5）获取系统当前时间

6）生成32位编码不含横线

7）生成MD5编码

8）通过身份证获取性别

9）通过身份证获取生日

10）通过身份证获取生日

11）手机号中间4位替换成星号

12）邮箱地址加星号

13）生成随机密码

下面给出使用方法类；

package commons;

import com.alibaba.fastjson.JSONObject;
import org.apache.commons.beanutils.BeanUtilsBean;
import org.apache.commons.beanutils.PropertyUtilsBean;
import org.springframework.util.DigestUtils;
import org.springframework.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLDecoder;
import java.security.SecureRandom;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Stream;

/**
* 通用工具类.
*/
public class CommonUtil {
private static SecureRandom random = new SecureRandom();

public static final Pattern MAIL_PATTERN = Pattern.compile("^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");

public static final Pattern MOBILE_PATTERN = Pattern.compile("^1[3|4|5|7|8][0-9]\d{8}$");

public static final Pattern NAME_PATTERN = Pattern.compile("^[\u4E00-\u9FBF][\u4E00-\u9FBF(.|·)]{0,13}[\u4E00-\u9FBF]$");

public static final Pattern NICKNAME_PATTERN = Pattern.compile("^((?!\d{5})[\u4E00-\u9FBF(.|·)|0-9A-Za-z_]){2,11}$");

public static final Pattern PASSWORD_PATTERN = Pattern.compile("^[\s\S]{6,30}$");

public static final Pattern CODE_PATTERN = Pattern.compile("^0\d{2,4}$");

public static final Pattern POSTCODE_PATTERN = Pattern.compile("^\d{6}$");

public static final Pattern ID_PATTERN = Pattern.compile("^\d{6}(\d{8}|\d{11})[0-9a-zA-Z]$");

public static final Pattern BANK_CARD_PATTERN = Pattern.compile("^\d{16,30}$");

/**
* 生成6位随机数字, 用于手机短信验证码.
*
* @return 6位随机数字
*/
public static int random() {
int x = Math.abs(random.nextInt(899999));

return x + 100000;
}

/**
* 对url字符串进行编码.
*
* @param url 要编码的url字符串
* @return 编码后的字符串
*/
public static String urlEncoder(String url) {
if (StringUtils.isEmpty(url)) {
return null;
}
try {
return java.net.URLEncoder.encode(url, "utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}

/**
* 对url字符串进行解码.
*
* @param url 要解码的url字符串
* @return 解码后的字符串
*/
public static String urlDecoder(String url) {
if (StringUtils.isEmpty(url)) {
return null;
}
try {
return URLDecoder.decode(url, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}

/**
* 验证字符串是不是邮箱.
*
* @param email 要验证的邮箱
* @return 是否正确邮箱
*/
public static boolean validateEmail(String email) {
if (StringUtils.isEmpty(email)) {
return false;
}
Matcher m = MAIL_PATTERN.matcher(email);
return m.matches();
}

/**
* 验证字符串是不是手机号.
*
* @param mobile 要验证的手机号
* @return 是否正确手机号
*/
public static boolean validateMobile(String mobile) {
if (StringUtils.isEmpty(mobile)) {
return false;
}
Matcher m = MOBILE_PATTERN.matcher(mobile);
return m.matches();
}

/**
* 验证身份证是否有效.
*
* @param idCardNumber 要验证的身份证
* @return 是否正确身份证
*/
public static boolean validateId(String idCardNumber) {
if (StringUtils.isEmpty(idCardNumber)) {
return false;
}
Matcher m = ID_PATTERN.matcher(idCardNumber);
return m.matches() && IdCardUtils.validateCard(idCardNumber);
}

/**
* 验证姓名是否有效.
*
* @param name 要验证的姓名
* @return 是否正确姓名
*/
public static boolean validateName(String name) {
if (StringUtils.isEmpty(name) || name.replaceAll("[^.·]", "").length() > 1) {
return false;
}
Matcher m = NAME_PATTERN.matcher(name);
return m.matches();
}

/**
* 验证昵称是否有效.
*
* @param nickname 要验证的昵称
* @return 是否正确昵称
*/
public static boolean validateNickname(String nickname) {

//规则 不能包含5个数字 允许中英文和数字 2-11位
if (StringUtils.isEmpty(nickname) || nickname.replaceAll("[^0-9]", "").length() > 4) {
return false;
}
Matcher m = NICKNAME_PATTERN.matcher(nickname);
return m.matches();
}

/**
* 验证密码格式是否有效.
*
* @param password 要验证的密码
* @return 是否正确密码格式
*/
public static boolean validatePassword(String password) {
if (StringUtils.isEmpty(password)) {
return false;
}
Matcher m = PASSWORD_PATTERN.matcher(password);
return m.matches();
}

/**
* 验证区号是否有效.
*
* @param code 要验证的区号
* @return 是否正确身份证
*/
public static boolean validateCode(String code) {
if (StringUtils.isEmpty(code)) {
return false;
}
Matcher m = CODE_PATTERN.matcher(code);
return m.matches();
}

/**
* 验证邮政编码是否有效.
*
* @param postcode 要验证的邮政编码
* @return 是否正确邮政编码
*/
public static boolean validatePostcode(String postcode) {
if (StringUtils.isEmpty(postcode)) {
return false;
}
Matcher m = POSTCODE_PATTERN.matcher(postcode);
return m.matches();
}

/**
* 验证银行卡是否有效.
*
* @param bankCardNumber 要验证的银行卡号
* @return 是否正确银行卡号
*/
public static boolean validateBankCardNumber(String bankCardNumber) {
if (StringUtils.isEmpty(bankCardNumber)) {
return false;
}
Matcher m = BANK_CARD_PATTERN.matcher(bankCardNumber);
return m.matches();
}

/**
* 获取客户端IP地址.
*
* @param request request请求
* @return ip地址
*/
public static String getIpAddr(HttpServletRequest request) {
String ip = request.getHeader("Cdn-Src-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.getRemoteAddr();
}
if (StringUtils.hasText(ip)) {
return StringUtils.tokenizeToStringArray(ip, ",")[0];
}
return "";
}

/**
* 获取当前系统时间,以java.sql.Timestamp类型返回.
*
* @return 当前时间
*/
public static Timestamp getTimestamp() {
Timestamp d = new Timestamp(System.currentTimeMillis());
return d;
}

/**
* 生成32位编码,不含横线
*
* @return uuid串
*/
public static String getUUID() {
String uuid = UUID.randomUUID().toString().trim().replaceAll("-", "");
return uuid.toUpperCase();
}

/**
* 生成MD5编码
*
* @param data 要编码的字符串
* @return 加密后的字符串
*/
public static String md5(String data) {
return md5(data, 1);
}

/**
* 生成MD5编码
*
* @param data 要编码的字符串
* @param time 加密次数
* @return 加密后的字符串
*/
public static String md5(String data, int time) {
byte[] bytes = data == null ? new byte[0] : data.getBytes(Constants.UTF8);

while (time-- > 1) {
bytes = DigestUtils.md5Digest(bytes);
}

return DigestUtils.md5DigestAsHex(bytes).toUpperCase();
}

/**
* 空字符串转为null
*
* @param object 要规则化的对象
* @param <T> 对象类型
* @return 规则化后的对象
*/
public static <T> T normalizeBlankStringFields(T object) {
if (object == null) return null;

PropertyUtilsBean utils = BeanUtilsBean.getInstance().getPropertyUtils();
Stream.of(utils.getPropertyDescriptors(object)).forEach(pd -> {
try {
Object value = utils.getNestedProperty(object, pd.getName());
if (value == null) return;

if (!StringUtils.hasText(value.toString())) {
utils.setNestedProperty(object, pd.getName(), null);
}
} catch (Throwable e) {
}
});

return object;
}

/**
* 通过身份证获取性别
*
* @param idNumber 身份证号
* @return 返回性别, 0 保密 , 1 男 2 女
*/
public static Integer getGenderByIdNumber(String idNumber) {

int gender = 0;

if (idNumber.length() == 15) {
gender = Integer.parseInt(String.valueOf(idNumber.charAt(14))) % 2 == 0 ? 2 : 1;
} else if (idNumber.length() == 18) {
gender = Integer.parseInt(String.valueOf(idNumber.charAt(16))) % 2 == 0 ? 2 : 1;
}

return gender;

}

/**
* 通过身份证获取生日
*
* @param idNumber 身份证号
* @return 返回生日, 格式为 yyyy-MM-dd 的字符串
*/
public static String getBirthdayByIdNumber(String idNumber) {

String birthday = "";

if (idNumber.length() == 15) {
birthday = "19" + idNumber.substring(6, 8) + "-" + idNumber.substring(8, 10) + "-" + idNumber.substring(10, 12);
} else if (idNumber.length() == 18) {
birthday = idNumber.substring(6, 10) + "-" + idNumber.substring(10, 12) + "-" + idNumber.substring(12, 14);
}

return birthday;

}

/**
* 通过身份证获取年龄
*
* @param idNumber 身份证号
* @return 返回年龄
*/
public static Integer getAgeByIdNumber(String idNumber) {

String birthString = getBirthdayByIdNumber(idNumber);
if (StringUtils.isEmpty(birthString)) {
return 0;
}

return getAgeByBirthString(birthString);

}

/**
* 通过身份证获取年龄
*
* @param idNumber 身份证号
* @param isNominalAge 是否按元旦算年龄，过了1月1日加一岁 true : 是 false : 否
* @return 返回年龄
*/
public static Integer getAgeByIdNumber(String idNumber, boolean isNominalAge) {

String birthString = getBirthdayByIdNumber(idNumber);
if (StringUtils.isEmpty(birthString)) {
return 0;
}

return getAgeByBirthString(birthString, isNominalAge);

}

/**
* 通过生日日期获取年龄
*
* @param birthDate 生日日期
* @return 返回年龄
*/
public static Integer getAgeByBirthDate(Date birthDate) {

return getAgeByBirthString(new SimpleDateFormat("yyyy-MM-dd").format(birthDate));

}

/**
* 通过生日字符串获取年龄
*
* @param birthString 生日字符串
* @return 返回年龄
*/
public static Integer getAgeByBirthString(String birthString) {

return getAgeByBirthString(birthString, "yyyy-MM-dd");

}

/**
* 通过生日字符串获取年龄
*
* @param birthString 生日字符串
* @param isNominalAge 是否按元旦算年龄，过了1月1日加一岁 true : 是 false : 否
* @return 返回年龄
*/
public static Integer getAgeByBirthString(String birthString, boolean isNominalAge) {

return getAgeByBirthString(birthString, "yyyy-MM-dd", isNominalAge);

}

/**
* 通过生日字符串获取年龄
*
* @param birthString 生日字符串
* @param format 日期字符串格式,为空则默认"yyyy-MM-dd"
* @return 返回年龄
*/
public static Integer getAgeByBirthString(String birthString, String format) {
return getAgeByBirthString(birthString, "yyyy-MM-dd", false);
}

/**
* 通过生日字符串获取年龄
*
* @param birthString 生日字符串
* @param format 日期字符串格式,为空则默认"yyyy-MM-dd"
* @param isNominalAge 是否按元旦算年龄，过了1月1日加一岁 true : 是 false : 否
* @return 返回年龄
*/
public static Integer getAgeByBirthString(String birthString, String format, boolean isNominalAge) {

int age = 0;

if (StringUtils.isEmpty(birthString)) {
return age;
}

if (StringUtils.isEmpty(format)) {
format = "yyyy-MM-dd";
}

try {

Calendar birthday = Calendar.getInstance();
Calendar today = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat(format);
birthday.setTime(sdf.parse(birthString));
age = today.get(Calendar.YEAR) - birthday.get(Calendar.YEAR);
if (!isNominalAge) {
if (today.get(Calendar.MONTH) < birthday.get(Calendar.MONTH) ||
(today.get(Calendar.MONTH) == birthday.get(Calendar.MONTH) &&
today.get(Calendar.DAY_OF_MONTH) < birthday.get(Calendar.DAY_OF_MONTH))) {
age = age - 1;
}
}
} catch (ParseException e) {
e.printStackTrace();
}

return age;

}

/**
* 手机号中间四位替换成星号
*
* @param mobile
* @return
*/
public static String maskMobile(String mobile) {
if (validateMobile(mobile)) {
return mobile.replaceAll("(\d{3})\d{4}(\d{4})", "$1****$2");
}
return mobile;
}

/**
* 手机号中间四位自定义替换
*
* @param mobile
* @param transCode 中间四位目标值 如GXJF 将136GXJF1111
* @return
*/
public static String maskMobile(String mobile, String transCode) {
if (validateMobile(mobile)) {
transCode = StringUtils.isEmpty(transCode) ? "****" : transCode;
return mobile.replaceAll("(\d{3})\d{4}(\d{4})", String.format("$1%s$2", transCode));
}
return mobile;
}

/**
* 邮箱地址加星号
*
* @param email
* @return
*/
public static String maskEmail(String email) {
if (validateEmail(email)) {
String userName = email.substring(0, email.indexOf("@"));
int len = userName.length();
if (len >= 5) {
int total = len - 3;
int half = total / 2;
int start = half;
int end = len - half;
if (total % 2 != 0) {
end = end - 1;
}
StringBuilder sb = new StringBuilder(email);
for (int i = start; i < end; i++) {
sb.setCharAt(i, '*');
}
return sb.toString();
}
}
return email;
}

/**
* 账号中间四位自定义替换
*
* @param account
* @return
*/
public static String maskTradeAccount(String account) {
return account.replaceAll("(\d{7})\d*(\d{4})", "$1****$2");
}

/**
* 读取jsonResult的value中的某个属性值
*
* @param jsonResult
* @param attrName
* @return
*/

public static String readJSONResultValueAttr(JSONResult jsonResult, String attrName) {
String ret = "";
try {
ret = ((JSONObject) jsonResult.getValue()).get(attrName).toString();
} catch (Exception e) {
//e.printStackTrace();
}
return ret;
}

/**
* 验证是否为日期
*
* @param date
* @return
*/
public static boolean validateDate(String date) {
boolean convertSuccess = true;
SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd");
try {
format.setLenient(false);
format.parse(date);
} catch (ParseException e) {
convertSuccess = false;
}
return convertSuccess;
}

/**
* 获取时间戳,作为递增的ID
*/
private static final Lock lock = new ReentrantLock(); //锁对象

public static long getUniqueLong() {
long l;
lock.lock();
try {
l = System.currentTimeMillis();
} finally {
lock.unlock();
}
return l;
}

/**
* 解析出url参数中的键值对
* 如 "index.jsp?Action=del&id=123"，解析出Action:del,id:123存入map中
*
* @param URL url地址
* @return url请求参数部分
*/
public static String getUrlParams(String URL, String key) {
Map<String, String> mapRequest = new HashMap<String, String>();
String[] arrSplit = null;
String strUrlParam = null;
java.net.URL aURL = null;
try {
aURL = new URL(URL);
strUrlParam = aURL.getQuery();
} catch (MalformedURLException e) {
e.printStackTrace();
}
if (strUrlParam == null) {
return "";
}
arrSplit = strUrlParam.split("[&]");
for (String strSplit : arrSplit) {
String[] arrSplitEqual = null;
arrSplitEqual = strSplit.split("[=]");
if (arrSplitEqual.length > 1) {
mapRequest.put(arrSplitEqual[0], arrSplitEqual[1]);
} else {
if (!StringUtils.isEmpty(arrSplitEqual[0])) {
mapRequest.put(arrSplitEqual[0], "");
}
}
}
if (mapRequest.containsKey(key)) {
try {
return URLDecoder.decode(mapRequest.get(key), "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (Exception e) {

}
}
return "";
}

/**
* 生成随机密码
*
* @param pwd_len 生成的密码的总长度
* @return 密码的字符串
*/
public static String genRandomNum(int pwd_len) {
// 35是因为数组是从0开始的，26个字母+10个数字
final int maxNum = 36;
int i; // 生成的随机数
int count = 0; // 生成的密码的长度
char[] str = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k',
'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
StringBuffer pwd = new StringBuffer("");
Random r = new Random();
while (count < pwd_len) {
// 生成随机数，取绝对值，防止生成负数，
i = Math.abs(r.nextInt(maxNum)); // 生成的数最大为36-1
if (i >= 0 && i < str.length) {
pwd.append(str[i]);
count++;
}
}
return pwd.toString();
}

}
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