| | |
| | | package com.panzhihua.common.utlis; |
| | | |
| | | |
| | | import java.util.*; |
| | | import java.util.regex.Pattern; |
| | | |
| | | /** |
| | | * 字符串工具类 |
| | | * |
| | | * @author ruoyi |
| | | */ |
| | | public class StringUtils extends org.apache.commons.lang3.StringUtils |
| | | { |
| | | public class StringUtils extends org.apache.commons.lang3.StringUtils { |
| | | /** 空字符串 */ |
| | | private static final String NULLSTR = ""; |
| | | |
| | |
| | | /** |
| | | * 获取参数不为空值 |
| | | * |
| | | * @param value defaultValue 要判断的value |
| | | * @param value |
| | | * defaultValue 要判断的value |
| | | * @return value 返回值 |
| | | */ |
| | | public static <T> T nvl(T value, T defaultValue) |
| | | { |
| | | 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 |
| | | * @param coll |
| | | * 要判断的Collection |
| | | * @return true:为空 false:非空 |
| | | */ |
| | | public static boolean isEmpty(Collection<?> coll) |
| | | { |
| | | 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 |
| | | * @param coll |
| | | * 要判断的Collection |
| | | * @return true:非空 false:空 |
| | | */ |
| | | public static boolean isNotEmpty(Collection<?> coll) |
| | | { |
| | | 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 |
| | | * @param objects |
| | | * 要判断的对象数组 |
| | | ** @return true:为空 false:非空 |
| | | */ |
| | | public static boolean isEmpty(Object[] objects) |
| | | { |
| | | 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 |
| | | * @param objects |
| | | * 要判断的对象数组 |
| | | * @return true:非空 false:空 |
| | | */ |
| | | public static boolean isNotEmpty(Object[] objects) |
| | | { |
| | | 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 |
| | | * @param map |
| | | * 要判断的Map |
| | | * @return true:为空 false:非空 |
| | | */ |
| | | public static boolean isEmpty(Map<?, ?> map) |
| | | { |
| | | 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 |
| | | * @param map |
| | | * 要判断的Map |
| | | * @return true:非空 false:空 |
| | | */ |
| | | public static boolean isNotEmpty(Map<?, ?> map) |
| | | { |
| | | public static boolean isNotEmpty(Map<?, ?> map) { |
| | | return !isEmpty(map); |
| | | } |
| | | |
| | | /** |
| | | * * 判断一个字符串是否为空串 |
| | | * |
| | | * @param str String |
| | | * @param str |
| | | * String |
| | | * @return true:为空 false:非空 |
| | | */ |
| | | public static boolean isEmpty(String str) |
| | | { |
| | | 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 |
| | | * @param str |
| | | * String |
| | | * @return true:非空串 false:空串 |
| | | */ |
| | | public static boolean isNotEmpty(String str) |
| | | { |
| | | public static boolean isNotEmpty(String str) { |
| | | return !isEmpty(str); |
| | | } |
| | | |
| | | /** |
| | | * * 判断一个对象是否为空 |
| | | * |
| | | * @param object Object |
| | | * @param object |
| | | * Object |
| | | * @return true:为空 false:非空 |
| | | */ |
| | | public static boolean isNull(Object object) |
| | | { |
| | | public static boolean isNull(Object object) { |
| | | return object == null; |
| | | } |
| | | |
| | | /** |
| | | * * 判断一个对象是否非空 |
| | | * |
| | | * @param object Object |
| | | * @param object |
| | | * Object |
| | | * @return true:非空 false:空 |
| | | */ |
| | | public static boolean isNotNull(Object object) |
| | | { |
| | | 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 |
| | | * @param object |
| | | * 对象 |
| | | * @return true:是数组 false:不是数组 |
| | | */ |
| | | public static boolean isArray(Object object) |
| | | { |
| | | public static boolean isArray(Object object) { |
| | | return isNotNull(object) && object.getClass().isArray(); |
| | | } |
| | | |
| | | /** |
| | | * 去空格 |
| | | */ |
| | | public static String trim(String str) |
| | | { |
| | | 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 |
| | | * @param str |
| | | * 字符串 |
| | | * @param start |
| | | * 开始 |
| | | * @return 结果 |
| | | */ |
| | | public static String substring(final String str, int start) |
| | | { |
| | | if (str == null) |
| | | { |
| | | public static String substring(final String str, int start) { |
| | | if (str == null) { |
| | | return NULLSTR; |
| | | } |
| | | |
| | | if (start < 0) |
| | | { |
| | | if (start < 0) { |
| | | start = str.length() + start; |
| | | } |
| | | |
| | | if (start < 0) |
| | | { |
| | | if (start < 0) { |
| | | start = 0; |
| | | } |
| | | if (start > str.length()) |
| | | { |
| | | if (start > str.length()) { |
| | | return NULLSTR; |
| | | } |
| | | |
| | |
| | | /** |
| | | * 截取字符串 |
| | | * |
| | | * @param str 字符串 |
| | | * @param start 开始 |
| | | * @param end 结束 |
| | | * @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) |
| | | { |
| | | public static String substring(final String str, int start, int end) { |
| | | if (str == null) { |
| | | return NULLSTR; |
| | | } |
| | | |
| | | if (end < 0) |
| | | { |
| | | if (end < 0) { |
| | | end = str.length() + end; |
| | | } |
| | | if (start < 0) |
| | | { |
| | | if (start < 0) { |
| | | start = str.length() + start; |
| | | } |
| | | |
| | | if (end > str.length()) |
| | | { |
| | | if (end > str.length()) { |
| | | end = str.length(); |
| | | } |
| | | |
| | | if (start > end) |
| | | { |
| | | if (start > end) { |
| | | return NULLSTR; |
| | | } |
| | | |
| | | if (start < 0) |
| | | { |
| | | if (start < 0) { |
| | | start = 0; |
| | | } |
| | | if (end < 0) |
| | | { |
| | | if (end < 0) { |
| | | end = 0; |
| | | } |
| | | |
| | |
| | | * 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 |
| | | * @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)) |
| | | { |
| | | public static String format(String template, Object... params) { |
| | | if (isEmpty(params) || isEmpty(template)) { |
| | | return template; |
| | | } |
| | | return StrFormatter.format(template, params); |
| | |
| | | /** |
| | | * 字符串转set |
| | | * |
| | | * @param str 字符串 |
| | | * @param sep 分隔符 |
| | | * @param str |
| | | * 字符串 |
| | | * @param sep |
| | | * 分隔符 |
| | | * @return set集合 |
| | | */ |
| | | public static final Set<String> str2Set(String str, String sep) |
| | | { |
| | | public static final Set<String> str2Set(String str, String sep) { |
| | | return new HashSet<String>(str2List(str, sep, true, false)); |
| | | } |
| | | |
| | | /** |
| | | * 字符串转list |
| | | * |
| | | * @param str 字符串 |
| | | * @param sep 分隔符 |
| | | * @param filterBlank 过滤纯空白 |
| | | * @param trim 去掉首尾空白 |
| | | * @param str |
| | | * 字符串 |
| | | * @param sep |
| | | * 分隔符 |
| | | * @param filterBlank |
| | | * 过滤纯空白 |
| | | * @param trim |
| | | * 去掉首尾空白 |
| | | * @return list集合 |
| | | */ |
| | | public static final List<String> str2List(String str, String sep, boolean filterBlank, boolean trim) |
| | | { |
| | | public static final List<String> str2List(String str, String sep, boolean filterBlank, boolean trim) { |
| | | List<String> list = new ArrayList<String>(); |
| | | if (StringUtils.isEmpty(str)) |
| | | { |
| | | if (StringUtils.isEmpty(str)) { |
| | | return list; |
| | | } |
| | | |
| | | // 过滤空白字符串 |
| | | if (filterBlank && StringUtils.isBlank(str)) |
| | | { |
| | | if (filterBlank && StringUtils.isBlank(str)) { |
| | | return list; |
| | | } |
| | | String[] split = str.split(sep); |
| | | for (String string : split) |
| | | { |
| | | if (filterBlank && StringUtils.isBlank(string)) |
| | | { |
| | | for (String string : split) { |
| | | if (filterBlank && StringUtils.isBlank(string)) { |
| | | continue; |
| | | } |
| | | if (trim) |
| | | { |
| | | if (trim) { |
| | | string = string.trim(); |
| | | } |
| | | list.add(string); |
| | |
| | | /** |
| | | * 下划线转驼峰命名 |
| | | */ |
| | | public static String toUnderScoreCase(String str) |
| | | { |
| | | if (str == null) |
| | | { |
| | | public static String toUnderScoreCase(String str) { |
| | | if (str == null) { |
| | | return null; |
| | | } |
| | | StringBuilder sb = new StringBuilder(); |
| | |
| | | boolean curreCharIsUpperCase = true; |
| | | // 下一字符是否大写 |
| | | boolean nexteCharIsUpperCase = true; |
| | | for (int i = 0; i < str.length(); i++) |
| | | { |
| | | for (int i = 0; i < str.length(); i++) { |
| | | char c = str.charAt(i); |
| | | if (i > 0) |
| | | { |
| | | if (i > 0) { |
| | | preCharIsUpperCase = Character.isUpperCase(str.charAt(i - 1)); |
| | | } |
| | | else |
| | | { |
| | | } else { |
| | | preCharIsUpperCase = false; |
| | | } |
| | | |
| | | curreCharIsUpperCase = Character.isUpperCase(c); |
| | | |
| | | if (i < (str.length() - 1)) |
| | | { |
| | | if (i < (str.length() - 1)) { |
| | | nexteCharIsUpperCase = Character.isUpperCase(str.charAt(i + 1)); |
| | | } |
| | | |
| | | if (preCharIsUpperCase && curreCharIsUpperCase && !nexteCharIsUpperCase) |
| | | { |
| | | if (preCharIsUpperCase && curreCharIsUpperCase && !nexteCharIsUpperCase) { |
| | | sb.append(SEPARATOR); |
| | | } |
| | | else if ((i != 0 && !preCharIsUpperCase) && curreCharIsUpperCase) |
| | | { |
| | | } else if ((i != 0 && !preCharIsUpperCase) && curreCharIsUpperCase) { |
| | | sb.append(SEPARATOR); |
| | | } |
| | | sb.append(Character.toLowerCase(c)); |
| | |
| | | /** |
| | | * 是否包含字符串 |
| | | * |
| | | * @param str 验证字符串 |
| | | * @param strs 字符串组 |
| | | * @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))) |
| | | { |
| | | public static boolean inStringIgnoreCase(String str, String... strs) { |
| | | if (str != null && strs != null) { |
| | | for (String s : strs) { |
| | | if (str.equalsIgnoreCase(trim(s))) { |
| | | return true; |
| | | } |
| | | } |
| | |
| | | /** |
| | | * 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 |
| | | * @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) |
| | | { |
| | | public static String convertToCamelCase(String name) { |
| | | StringBuilder result = new StringBuilder(); |
| | | // 快速检查 |
| | | if (name == null || name.isEmpty()) |
| | | { |
| | | if (name == null || name.isEmpty()) { |
| | | // 没必要转换 |
| | | return ""; |
| | | } |
| | | else if (!name.contains("_")) |
| | | { |
| | | } 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) |
| | | { |
| | | 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()) |
| | | { |
| | | if (camel.isEmpty()) { |
| | | continue; |
| | | } |
| | | // 首字母大写 |
| | |
| | | /** |
| | | * 驼峰式命名法 例如:user_name->userName |
| | | */ |
| | | public static String toCamelCase(String s) |
| | | { |
| | | if (s == null) |
| | | { |
| | | public static String toCamelCase(String s) { |
| | | if (s == null) { |
| | | return null; |
| | | } |
| | | s = s.toLowerCase(); |
| | | StringBuilder sb = new StringBuilder(s.length()); |
| | | boolean upperCase = false; |
| | | for (int i = 0; i < s.length(); i++) |
| | | { |
| | | for (int i = 0; i < s.length(); i++) { |
| | | char c = s.charAt(i); |
| | | |
| | | if (c == SEPARATOR) |
| | | { |
| | | if (c == SEPARATOR) { |
| | | upperCase = true; |
| | | } |
| | | else if (upperCase) |
| | | { |
| | | } else if (upperCase) { |
| | | sb.append(Character.toUpperCase(c)); |
| | | upperCase = false; |
| | | } |
| | | else |
| | | { |
| | | } else { |
| | | sb.append(c); |
| | | } |
| | | } |
| | |
| | | } |
| | | |
| | | @SuppressWarnings("unchecked") |
| | | public static <T> T cast(Object obj) |
| | | { |
| | | return (T) obj; |
| | | public static <T> T cast(Object obj) { |
| | | return (T)obj; |
| | | } |
| | | |
| | | /** |
| | | * 判断是否为数字格式不限制位数 |
| | | * |
| | | * @param o |
| | | * 待校验参数 |
| | | * @return 如果全为数字,返回true;否则,返回false |
| | | */ |
| | | public static boolean isNumber(Object o) { |
| | | return (Pattern.compile("[0-9]*")).matcher(String.valueOf(o)).matches(); |
| | | } |
| | | } |