自訂封裝StringUtils常用工具類

                自訂封裝StringUtils常用工具類

package com.demo.utils;import java.util.ArrayList;import java.util.List;import java.util.Map;/** * 字串操作工具類 * @author dongyangyang * @Date 2016/12/28 23:12 * @Version 1.0 * */public class StringUtils {    /**     * 首字母變小寫     * @param str     * @return     */    public static String firstCharToLowerCase(String str) {        char firstChar = str.charAt(0);        if (firstChar >= 'A' && firstChar <= 'Z') {            char[] arr = str.toCharArray();            arr[0] += ('a' - 'A');            return new String(arr);        }        return str;    }    /**     * 首字母變大寫     * @param str     * @return     */    public static String firstCharToUpperCase(String str) {        char firstChar = str.charAt(0);        if (firstChar >= 'a' && firstChar <= 'z') {            char[] arr = str.toCharArray();            arr[0] -= ('a' - 'A');            return new String(arr);        }        return str;    }    /**     * 判斷是否為空白     * @param str     * @return     */    public static boolean isEmpty(final String str) {        return (str == null) || (str.length() == 0);    }    /**     * 判斷是否不為空白     * @param str     * @return     */    public static boolean isNotEmpty(final String str) {        return !isEmpty(str);    }    /**     * 判斷是否空白     * @param str     * @return     */    public static boolean isBlank(final String str) {        int strLen;        if ((str == null) || ((strLen = str.length()) == 0))            return true;        for (int i = 0; i < strLen; i++) {            if (!Character.isWhitespace(str.charAt(i))) {                return false;            }        }        return true;    }    /**     * 判斷是否不是空白     * @param str     * @return     */    public static boolean isNotBlank(final String str) {        return !isBlank(str);    }    /**     * 判斷多個字串全部是否為空白     * @param strings     * @return     */    public static boolean isAllEmpty(String... strings) {        if (strings == null) {            return true;        }        for (String str : strings) {            if (isNotEmpty(str)) {                return false;            }        }        return true;    }    /**     * 判斷多個字串其中任意一個是否為空白     * @param strings     * @return     */    public static boolean isHasEmpty(String... strings) {        if (strings == null) {            return true;        }        for (String str : strings) {            if (isEmpty(str)) {                return true;            }        }        return false;    }    /**     * checkValue為 null 或者為 "" 時返回 defaultValue     * @param checkValue     * @param defaultValue     * @return     */    public static String isEmpty(String checkValue, String defaultValue) {        return isEmpty(checkValue) ? defaultValue : checkValue;    }    /**     * 字串不為 null 而且不為 "" 並且等於other     * @param str     * @param other     * @return     */    public static boolean isNotEmptyAndEquelsOther(String str, String other) {        if (isEmpty(str)) {            return false;        }        return str.equals(other);    }    /**     * 字串不為 null 而且不為 "" 並且不等於other     * @param str     * @param other     * @return     */    public static boolean isNotEmptyAndNotEquelsOther(String str, String... other) {        if (isEmpty(str)) {            return false;        }        for (int i = 0; i < other.length; i++) {            if (str.equals(other[i])) {                return false;            }        }        return true;    }    /**     * 字串不等於other     * @param str     * @param other     * @return     */    public static boolean isNotEquelsOther(String str, String... other) {        for (int i = 0; i < other.length; i++) {            if (other[i].equals(str)) {                return false;            }        }        return true;    }    /**     * 判斷字串不為空白     * @param strings     * @return     */    public static boolean isNotEmpty(String... strings) {        if (strings == null) {            return false;        }        for (String str : strings) {            if (str == null || "".equals(str.trim())) {                return false;            }        }        return true;    }    /**     * 比較字元相等     * @param value     * @param equals     * @return     */    public static boolean equals(String value, String equals) {        if (isAllEmpty(value, equals)) {            return true;        }        return value.equals(equals);    }    /**     * 比較字串不相等     * @param value     * @param equals     * @return     */    public static boolean isNotEquals(String value, String equals) {        return !equals(value, equals);    }    public static String[] split(String content, String separatorChars) {        return splitWorker(content, separatorChars, -1, false);    }    public static String[] split(String str, String separatorChars, int max) {        return splitWorker(str, separatorChars, max, false);    }    public static final String[] EMPTY_STRING_ARRAY = new String[0];    private static String[] splitWorker(String str, String separatorChars, int max, boolean preserveAllTokens) {        if (str == null) {            return null;        }        int len = str.length();        if (len == 0) {            return EMPTY_STRING_ARRAY;        }        List<String> list = new ArrayList<String>();        int sizePlus1 = 1;        int i = 0, start = 0;        boolean match = false;        boolean lastMatch = false;        if (separatorChars == null) {            while (i < len) {                if (Character.isWhitespace(str.charAt(i))) {                    if (match || preserveAllTokens) {                        lastMatch = true;                        if (sizePlus1++ == max) {                            i = len;                            lastMatch = false;                        }                        list.add(str.substring(start, i));                        match = false;                    }                    start = ++i;                    continue;                }                lastMatch = false;                match = true;                i++;            }        } else if (separatorChars.length() == 1) {            char sep = separatorChars.charAt(0);            while (i < len) {                if (str.charAt(i) == sep) {                    if (match || preserveAllTokens) {                        lastMatch = true;                        if (sizePlus1++ == max) {                            i = len;                            lastMatch = false;                        }                        list.add(str.substring(start, i));                        match = false;                    }                    start = ++i;                    continue;                }                lastMatch = false;                match = true;                i++;            }        } else {            while (i < len) {                if (separatorChars.indexOf(str.charAt(i)) >= 0) {                    if (match || preserveAllTokens) {                        lastMatch = true;                        if (sizePlus1++ == max) {                            i = len;                            lastMatch = false;                        }                        list.add(str.substring(start, i));                        match = false;                    }                    start = ++i;                    continue;                }                lastMatch = false;                match = true;                i++;            }        }        if (match || (preserveAllTokens && lastMatch)) {            list.add(str.substring(start, i));        }        return (String[]) list.toArray(EMPTY_STRING_ARRAY);    }    /**     * 消除逸出字元     * @param str     * @return     */    public static String escapeXML(String str) {        if (str == null)            return "";        StringBuilder sb = new StringBuilder();        for (int i = 0; i < str.length(); ++i) {            char c = str.charAt(i);            switch (c) {            case '\u00FF':            case '\u0024':                break;            case '&':                sb.append("&amp;");                break;            case '<':                sb.append("&lt;");                break;            case '>':                sb.append("&gt;");                break;            case '\"':                sb.append("&quot;");                break;            case '\'':                sb.append("&apos;");                break;            default:                if (c >= '\u0000' && c <= '\u001F')                    break;                if (c >= '\uE000' && c <= '\uF8FF')                    break;                if (c >= '\uFFF0' && c <= '\uFFFF')                    break;                sb.append(c);                break;            }        }        return sb.toString();    }    /**     * 將字串中特定模式的字元轉換成map中對應的值     *     * @param s     *            需要轉換的字串     * @param map     *            轉換所需的索引值對集合     * @return 轉換後的字串     */    public static String replace(String s, Map<String, Object> map) {        StringBuilder ret = new StringBuilder((int) (s.length() * 1.5));        int cursor = 0;        for (int start, end; (start = s.indexOf("${", cursor)) != -1 && (end = s.indexOf("}", start)) != -1;) {            ret.append(s.substring(cursor, start)).append(map.get(s.substring(start + 2, end)));            cursor = end + 1;        }        ret.append(s.substring(cursor, s.length()));        return ret.toString();    }    public static String replace(String s, Object... objs) {        if (objs == null || objs.length == 0)            return s;        if (s.indexOf("{}") == -1)            return s;        StringBuilder ret = new StringBuilder((int) (s.length() * 1.5));        int cursor = 0;        int index = 0;        for (int start; (start = s.indexOf("{}", cursor)) != -1;) {            ret.append(s.substring(cursor, start));            if (index < objs.length)                ret.append(objs[index]);            else                ret.append("{}");            cursor = start + 2;            index++;        }        ret.append(s.substring(cursor, s.length()));        return ret.toString();    }    /**     * 字串格式化工具,參數必須以{0}之類的樣式標示出來.大括弧中的數字從0開始。     *      * @param source     *            源字串     * @param params     *            需要替換的參數列表,寫入時會調用每個參數的toString().     * @return 替換完成的字串。如果原始字串為空白或者參數為空白那麼將直接返回原始字串。     */    public static String replaceArgs(String source, Object... params) {        if (params == null || params.length == 0 || source == null || source.isEmpty()) {            return source;        }        StringBuilder buff = new StringBuilder(source);        StringBuilder temp = new StringBuilder();        int startIndex = 0;        int endIndex = 0;        String param = null;        for (int count = 0; count < params.length; count++) {            if (params[count] == null) {                param = null;            } else {                param = params[count].toString();            }            temp.delete(0, temp.length());            temp.append("{");            temp.append(count);            temp.append("}");            while (true) {                startIndex = buff.indexOf(temp.toString(), endIndex);                if (startIndex == -1) {                    break;                }                endIndex = startIndex + temp.length();                buff.replace(startIndex, endIndex, param == null ? "" : param);            }            startIndex = 0;            endIndex = 0;        }        return buff.toString();    }    public static String substringBefore(final String s, final String separator) {        if (isEmpty(s) || separator == null) {            return s;        }        if (separator.isEmpty()) {            return "";        }        final int pos = s.indexOf(separator);        if (pos < 0) {            return s;        }        return s.substring(0, pos);    }    public static String substringBetween(final String str, final String open, final String close) {        if (str == null || open == null || close == null) {            return null;        }        final int start = str.indexOf(open);        if (start != -1) {            final int end = str.indexOf(close, start + open.length());            if (end != -1) {                return str.substring(start + open.length(), end);            }        }        return null;    }    public static String substringAfter(final String str, final String separator) {        if (isEmpty(str)) {            return str;        }        if (separator == null) {            return "";        }        final int pos = str.indexOf(separator);        if (pos == -1) {            return "";        }        return str.substring(pos + separator.length());    }    /**    * 轉換為位元組數組    * @param str    * @return     */    public static String toString(byte[] bytes){      try {          return new String(bytes, "utf-8");        } catch (UnsupportedEncodingException e) {          return null;        }    }    /**    * 轉換為位元組數組    * @param str    * @return     */    public static byte[] getBytes(String str){      if (str != null){        try {            return str.getBytes("utf-8");          } catch (UnsupportedEncodingException e) {            return null;          }      }else{        return null;      }    }