123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538 |
- package com.ims.common.utils;
- import cn.hutool.core.text.StrBuilder;
- import cn.hutool.core.text.StrFormatter;
- import java.math.BigDecimal;
- import java.math.RoundingMode;
- import java.util.Collection;
- import java.util.Map;
- import java.util.UUID;
- import java.util.regex.Pattern;
- public class StringUtils{
- /** 空字符串 */
- private static final String NULLSTR = "";
- /** 下划线 */
- private static final char SEPARATOR = '_';
- /**
- * 获取参数不为空值
- *
- * @param value defaultValue 要判断的value
- * @return value 返回值
- */
- public static <T> T nvl(T value, T defaultValue)
- {
- return value != null ? value : defaultValue;
- }
- /**
- * * 判断一个Collection是否为空, 包含List,Set,Queue
- *
- * @param coll 要判断的Collection
- * @return true:为空 false:非空
- */
- public static boolean isEmpty(Collection<?> coll)
- {
- return isNull(coll) || coll.isEmpty();
- }
- /**
- * * 判断一个Collection是否非空,包含List,Set,Queue
- *
- * @param coll 要判断的Collection
- * @return true:非空 false:空
- */
- public static boolean isNotEmpty(Collection<?> coll)
- {
- return !isEmpty(coll);
- }
- /**
- * * 判断一个对象数组是否为空
- *
- * @param objects 要判断的对象数组
- ** @return true:为空 false:非空
- */
- public static boolean isEmpty(Object[] objects)
- {
- return isNull(objects) || (objects.length == 0);
- }
- /**
- * * 判断一个对象数组是否非空
- *
- * @param objects 要判断的对象数组
- * @return true:非空 false:空
- */
- public static boolean isNotEmpty(Object[] objects)
- {
- return !isEmpty(objects);
- }
- /**
- * * 判断一个Map是否为空
- *
- * @param map 要判断的Map
- * @return true:为空 false:非空
- */
- public static boolean isEmpty(Map<?, ?> map)
- {
- return isNull(map) || map.isEmpty();
- }
- /**
- * * 判断一个Map是否为空
- *
- * @param map 要判断的Map
- * @return true:非空 false:空
- */
- public static boolean isNotEmpty(Map<?, ?> map)
- {
- return !isEmpty(map);
- }
- /**
- * * 判断一个字符串是否为空串
- *
- * @param str String
- * @return true:为空 false:非空
- */
- public static boolean isEmpty(String str)
- {
- return isNull(str) || NULLSTR.equals(str.trim());
- }
- /**
- * * 判断一个字符串是否为非空串
- *
- * @param str String
- * @return true:非空串 false:空串
- */
- public static boolean isNotEmpty(String str)
- {
- return !isEmpty(str);
- }
- /**
- * * 判断一个对象是否为空
- *
- * @param object Object
- * @return true:为空 false:非空
- */
- public static boolean isNull(Object object)
- {
- return object == null;
- }
- /**
- * * 判断一个对象是否非空
- *
- * @param object Object
- * @return true:非空 false:空
- */
- public static boolean isNotNull(Object object)
- {
- return !isNull(object);
- }
- /**
- * * 判断一个对象是否是数组类型(Java基本型别的数组)
- *
- * @param object 对象
- * @return true:是数组 false:不是数组
- */
- public static boolean isArray(Object object)
- {
- return isNotNull(object) && object.getClass().isArray();
- }
- /**
- * 去空格
- */
- public static String trim(String str)
- {
- return (str == null ? "" : str.trim());
- }
- /**
- * 截取字符串
- *
- * @param str 字符串
- * @param start 开始
- * @return 结果
- */
- public static String substring(final String str, int start)
- {
- if (str == null)
- {
- return NULLSTR;
- }
- if (start < 0)
- {
- start = str.length() + start;
- }
- if (start < 0)
- {
- start = 0;
- }
- if (start > str.length())
- {
- return NULLSTR;
- }
- return str.substring(start);
- }
- /**
- * 截取字符串
- *
- * @param str 字符串
- * @param start 开始
- * @param end 结束
- * @return 结果
- */
- public static String substring(final String str, int start, int end)
- {
- if (str == null)
- {
- return NULLSTR;
- }
- if (end < 0)
- {
- end = str.length() + end;
- }
- if (start < 0)
- {
- start = str.length() + start;
- }
- if (end > str.length())
- {
- end = str.length();
- }
- if (start > end)
- {
- return NULLSTR;
- }
- if (start < 0)
- {
- start = 0;
- }
- if (end < 0)
- {
- end = 0;
- }
- return str.substring(start, end);
- }
- /**
- * 格式化文本, {} 表示占位符<br>
- * 此方法只是简单将占位符 {} 按照顺序替换为参数<br>
- * 如果想输出 {} 使用 \\转义 { 即可,如果想输出 {} 之前的 \ 使用双转义符 \\\\ 即可<br>
- * 例:<br>
- * 通常使用:format("this is {} for {}", "a", "b") -> this is a for b<br>
- * 转义{}: format("this is \\{} for {}", "a", "b") -> this is \{} for a<br>
- * 转义\: format("this is \\\\{} for {}", "a", "b") -> this is \a for b<br>
- *
- * @param template 文本模板,被替换的部分用 {} 表示
- * @param params 参数值
- * @return 格式化后的文本
- */
- public static String format(String template, Object... params)
- {
- if (isEmpty(params) || isEmpty(template))
- {
- return template;
- }
- return StrFormatter.format(template, params);
- }
- /**
- * 驼峰首字符小写 NameVc>>nameVc
- */
- public static String uncapitalize(String str)
- {
- int strLen;
- if (str == null || (strLen = str.length()) == 0)
- {
- return str;
- }
- return new StrBuilder(strLen).append(Character.toLowerCase(str.charAt(0))).append(str.substring(1)).toString();
- }
- /**
- * 下划线转驼峰命名 nameVc>>name_vc
- */
- public static String toUnderScoreCase(String s)
- {
- if (s == null)
- {
- return null;
- }
- StringBuilder sb = new StringBuilder();
- boolean upperCase = false;
- for (int i = 0; i < s.length(); i++)
- {
- char c = s.charAt(i);
- boolean nextUpperCase = true;
- if (i < (s.length() - 1))
- {
- nextUpperCase = Character.isUpperCase(s.charAt(i + 1));
- }
- if ((i > 0) && Character.isUpperCase(c))
- {
- if (!upperCase || !nextUpperCase)
- {
- sb.append(SEPARATOR);
- }
- upperCase = true;
- }
- else
- {
- upperCase = false;
- }
- sb.append(Character.toLowerCase(c));
- }
- return sb.toString();
- }
- /**
- * 是否包含字符串
- *
- * @param str 验证字符串
- * @param strs 字符串组
- * @return 包含返回true
- */
- public static boolean inStringIgnoreCase(String str, String... strs)
- {
- if (str != null && strs != null)
- {
- for (String s : strs)
- {
- if (str.equalsIgnoreCase(trim(s)))
- {
- return true;
- }
- }
- }
- return false;
- }
- /**
- * 将下划线大写方式命名的字符串转换为驼峰式。如果转换前的下划线大写方式命名的字符串为空,则返回空字符串。 例如:HELLO_WORLD->HelloWorld
- *
- * @param name 转换前的下划线大写方式命名的字符串
- * @return 转换后的驼峰式命名的字符串
- */
- public static String convertToCamelCase(String name)
- {
- StringBuilder result = new StringBuilder();
- // 快速检查
- if (name == null || name.isEmpty())
- {
- // 没必要转换
- return "";
- }
- else if (!name.contains("_"))
- {
- // 不含下划线,仅将首字母大写
- return name.substring(0, 1).toUpperCase() + name.substring(1);
- }
- // 用下划线将原始字符串分割
- String[] camels = name.split("_");
- for (String camel : camels)
- {
- // 跳过原始字符串中开头、结尾的下换线或双重下划线
- if (camel.isEmpty())
- {
- continue;
- }
- // 首字母大写
- result.append(camel.substring(0, 1).toUpperCase());
- result.append(camel.substring(1).toLowerCase());
- }
- return result.toString();
- }
- /**
- * 首字母大写
- *
- * @param name
- * @return
- */
- public static String firstUpperCase(String name) {
- name = name.substring(0, 1).toUpperCase() + name.substring(1);
- return name;
- }
- /**
- * 首字母小写
- *
- * @param name
- * @return
- */
- public static String firstLowerCase(String name) {
- name = name.substring(0, 1).toLowerCase() + name.substring(1);
- return name;
- }
- /**
- * 将下划线转化为大写
- *
- * @param name
- * @param firstCase 首字母是否大写 true:大写 false;小写
- * @return
- */
- public static String upperCase_(String name, boolean firstCase) {
- if(isEmpty(name)){
- return "";
- }
- String[] s = name.split("_");
- StringBuffer stringBuffer = new StringBuffer();
- for (String s1 : s) {
- stringBuffer.append(s1.substring(0, 1).toUpperCase() + s1.substring(1));
- }
- if(!firstCase){
- return firstLowerCase(stringBuffer.toString());
- }
- return stringBuffer.toString();
- }
- public static double round(double num, int digit) {
- return new BigDecimal(num).setScale(digit, RoundingMode.HALF_UP).doubleValue();
- }
- public static String getUUID(){
- String uuid = UUID.randomUUID().toString().trim().replaceAll("-", "");
- return uuid;
- }
- /**
- * 是否为空串
- *
- * @param obj
- * @return
- */
- public static boolean empty(Object obj) {
- if (obj == null)
- return true;
- String str;
- if (obj instanceof String) {
- str = (String) obj;
- } else {
- str = obj.toString();
- }
- return str.length() == 0;
- }
- /**
- * 是否不为空串
- *
- * @param obj
- * @return
- */
- public static boolean notEmp(Object obj) {
- return !empty(obj);
- }
- /**
- * 给字符串的左补0或右补0
- * @param str 要处理的字符串
- * @param length 补0后字符串总长度
- * @param type l-左补0 r-右补0
- * @return
- */
- public static String addZeroForStr(String str, int length,String type) {
- int strLen = str.length();
- if (strLen < length) {
- while (strLen < length) {
- StringBuffer sb = new StringBuffer();
- if("l".equals(type)){
- // 左补0
- sb.append("0").append(str);
- }else if("r".equals(type)){
- //右补0
- sb.append(str).append("0");
- }
- str = sb.toString();
- strLen = str.length();
- }
- }
- return str;
- }
- /**
- * 删除开头字符串
- * @param inStr
- * @param prefix
- * @return
- */
- public static String trimstart(String inStr, String prefix) {
- if (inStr.startsWith(prefix)) {
- return (inStr.substring(prefix.length()));
- }
- return inStr;
- }
- /**
- * 删除末尾字符串
- * @param inStr
- * @param suffix
- * @return
- */
- public static String trimend(String inStr, String suffix) {
- if (inStr.endsWith(suffix)) {
- return (inStr.substring(0,inStr.length()-suffix.length()));
- }
- return inStr;
- }
- /**
- * 判断字符串是否为数字
- * @param str
- * @return
- */
- public static boolean isNumber(String str) {
- Pattern pattern = Pattern.compile("-?[0-9]+.?[0-9]*");
- return pattern.matcher(str).matches();
- }
- // public static void main(String[] args) {
- // String chineseCharacter = "-你好";
- //
- // StringBuilder initials = new StringBuilder();
- // for (char c : chineseCharacter.toCharArray()) {
- // String[] pinyinArray = PinyinHelper.toHanyuPinyinStringArray(c);
- // if (pinyinArray != null && pinyinArray.length > 0) {
- // String pinyin = pinyinArray[0];
- // initials.append(pinyin.charAt(0));
- // } else {
- // initials.append(c);
- // }
- // }
- // System.out.println(initials.toString().toUpperCase());
- //
- // }
- }
|