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.exception.BadHanyuPinyinOutputFormatCombination;
public class PinyinUtil {
private static HanyuPinyinOutputFormat getDefaultFormat() {
HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
defaultFormat.setCaseType(HanyuPinyinCaseType.UPPERCASE);
defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
return defaultFormat;
}
/**
* 获取汉字串拼音首字母，英文字符不变
*
* @param chinese 汉字串
* @return 汉语拼音首字母
*/
public static String cn2FirstSpell(String chinese) {
StringBuffer pybf = new StringBuffer();
char[] arr = chinese.toCharArray();
HanyuPinyinOutputFormat defaultFormat = getDefaultFormat();
for (int i = 0; i < arr.length; i++) {
if (arr[i] > 128) {
try {
String[] _t = PinyinHelper.toHanyuPinyinStringArray(arr[i], defaultFormat);
if (_t != null) {
pybf.append(_t[0].charAt(0));
}
} catch (BadHanyuPinyinOutputFormatCombination e) {
e.printStackTrace();
}
} else {
pybf.append(arr[i]);
}
}
return pybf.toString().trim();
}
public static String cn2FirstSpell(char c) {
HanyuPinyinOutputFormat defaultFormat = getDefaultFormat();
String s = "";
try {
String[] _t = PinyinHelper.toHanyuPinyinStringArray(c, defaultFormat);
if (_t != null) {
s = _t[0].charAt(0) + "";
}
} catch (BadHanyuPinyinOutputFormatCombination e) {
e.printStackTrace();
}
return s;
}
/**
* 获取汉字串拼音，英文字符不变
*
* @param chinese 汉字串
* @return 汉语拼音
*/
public static String cn2Spell(String chinese) {
StringBuffer pybf = new StringBuffer();
char[] arr = chinese.toCharArray();
HanyuPinyinOutputFormat defaultFormat = getDefaultFormat();
for (int i = 0; i < arr.length; i++) {
if (arr[i] > 128) {
try {
pybf.append(PinyinHelper.toHanyuPinyinStringArray(arr[i], defaultFormat)[0]);
} catch (BadHanyuPinyinOutputFormatCombination e) {
e.printStackTrace();
}
} else {
pybf.append(arr[i]);
}
}
return pybf.toString();
}
}
import java.util.ArrayList;
import java.util.List;
/**
* String工具类.
*/
public class StringUtil {
private static final int INDEX_NOT_FOUND = -1;
private static final String EMPTY = "";
private static final int PAD_LIMIT = 8192;
/**
* 功能：将半角的符号转换成全角符号.(即英文字符转中文字符)
*
* @param str 源字符串
* @return String
*/
public static String changeToFull(String str) {
String source = "1234567890!@#$%^&*()abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_=+\\|[];:'\",<.>/?";
String[] decode = {"１", "２", "３", "４", "５", "６", "７", "８", "９", "０", "！", "＠", "＃", "＄", "％", "︿", "＆", "＊", "（", "）", "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", "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", "－", "＿", "＝", "＋", "＼", "｜", "【", "】", "；", "：", "'", "\"", "，", "〈", "。", "〉", "／", "？"};
String result = "";
for (int i = 0; i < str.length(); i++) {
int pos = source.indexOf(str.charAt(i));
if (pos != -1) {
result += decode[pos];
} else {
result += str.charAt(i);
}
}
return result;
}
/**
* 功能：cs串中是否一个都不包含字符数组searchChars中的字符。
*
* @param cs 字符串
* @param searchChars 字符数组
* @return boolean 都不包含返回true，否则返回false。
*/
public static boolean containsNone(CharSequence cs, char... searchChars) {
if (cs == null || searchChars == null) {
return true;
}
int csLen = cs.length();
int csLast = csLen - 1;
int searchLen = searchChars.length;
int searchLast = searchLen - 1;
for (int i = 0; i < csLen; i++) {
char ch = cs.charAt(i);
for (int j = 0; j < searchLen; j++) {
if (searchChars[j] == ch) {
if (Character.isHighSurrogate(ch)) {
if (j == searchLast) {
// missing low surrogate, fine, like
// String.indexOf(String)
return false;
}
if (i < csLast && searchChars[j + 1] == cs.charAt(i + 1)) {
return false;
}
} else {
// ch is in the Basic Multilingual Plane
return false;
}
}
}
}
return true;
}
/**
* 编码为Unicode，格式 '\u0020'.
*
*
* <pre>
* CharUtils.unicodeEscaped(' ') = "\u0020"
* CharUtils.unicodeEscaped('A') = "\u0041"
* </pre>
*
* @param ch 源字符串
* @return 转码后的字符串
*/
public static String unicodeEscaped(char ch) {
if (ch < 0x10) {
return "\\u000" + Integer.toHexString(ch);
} else if (ch < 0x100) {
return "\\u00" + Integer.toHexString(ch);
} else if (ch < 0x1000) {
return "\\u0" + Integer.toHexString(ch);
}
return "\\u" + Integer.toHexString(ch);
}
/**
* 进行tostring操作，如果传入的是null，返回空字符串。
*
* <pre>
* ObjectUtils.toString(null) = ""
* ObjectUtils.toString("") = ""
* ObjectUtils.toString("bat") = "bat"
* ObjectUtils.toString(Boolean.TRUE) = "true"
* </pre>
*
* @param obj 源
* @return String
*/
public static String toString(Object obj) {
return obj == null ? "" : obj.toString();
}
/**
* 进行tostring操作，如果传入的是null，返回指定的默认值。
*
* <pre>
* ObjectUtils.toString(null, null) = null
* ObjectUtils.toString(null, "null") = "null"
* ObjectUtils.toString("", "null") = ""
* ObjectUtils.toString("bat", "null") = "bat"
* ObjectUtils.toString(Boolean.TRUE, "null") = "true"
* </pre>
*
* @param obj 源
* @param nullStr 如果obj为null时返回这个指定值
* @return String
*/
public static String toString(Object obj, String nullStr) {
return obj == null ? nullStr : obj.toString();
}
/**
* 只从源字符串中移除指定开头子字符串.
*
* <pre>
* StringUtil.removeStart(null, *) = null
* StringUtil.removeStart("", *) = ""
* StringUtil.removeStart(*, null) = *
* StringUtil.removeStart("www.domain.com", "www.") = "domain.com"
* StringUtil.removeStart("domain.com", "www.") = "domain.com"
* StringUtil.removeStart("www.domain.com", "domain") = "www.domain.com"
* StringUtil.removeStart("abc", "") = "abc"
* </pre>
*
* @param str 源字符串
* @param remove 将要被移除的子字符串
* @return String
*/
public static String removeStart(String str, String remove) {
if (isEmpty(str) || isEmpty(remove)) {
return str;
}
if (str.startsWith(remove)) {
return str.substring(remove.length());
}
return str;
}
/**
* 只从源字符串中移除指定结尾的子字符串.
*
* <pre>
* StringUtil.removeEnd(null, *) = null
* StringUtil.removeEnd("", *) = ""
* StringUtil.removeEnd(*, null) = *
* StringUtil.removeEnd("www.domain.com", ".com.") = "www.domain.com"
* StringUtil.removeEnd("www.domain.com", ".com") = "www.domain"
* StringUtil.removeEnd("www.domain.com", "domain") = "www.domain.com"
* StringUtil.removeEnd("abc", "") = "abc"
* </pre>
*
* @param str 源字符串
* @param remove 将要被移除的子字符串
* @return String
*/
public static String removeEnd(String str, String remove) {
if (isEmpty(str) || isEmpty(remove)) {
return str;
}
if (str.endsWith(remove)) {
return str.substring(0, str.length() - remove.length());
}
return str;
}
/**
* 将一个字符串重复N次
*
* <pre>
* StringUtil.repeat(null, 2) = null
* StringUtil.repeat("", 0) = ""
* StringUtil.repeat("", 2) = ""
* StringUtil.repeat("a", 3) = "aaa"
* StringUtil.repeat("ab", 2) = "abab"
* StringUtil.repeat("a", -2) = ""
* </pre>
*
* @param str 源字符串
* @param repeat 重复的次数
* @return String
*/
public static String repeat(String str, int repeat) {
if (str == null) {
return null;
}
if (repeat <= 0) {
return EMPTY;
}
int inputLength = str.length();
if (repeat == 1 || inputLength == 0) {
return str;
}
if (inputLength == 1 && repeat <= PAD_LIMIT) {
return repeat(str.charAt(0), repeat);
}
int outputLength = inputLength * repeat;
switch (inputLength) {
case 1:
return repeat(str.charAt(0), repeat);
case 2:
char ch0 = str.charAt(0);
char ch1 = str.charAt(1);
char[] output2 = new char[outputLength];
for (int i = repeat * 2 - 2; i >= 0; i--, i--) {
output2[i] = ch0;
output2[i + 1] = ch1;
}
return new String(output2);
default:
StringBuilder buf = new StringBuilder(outputLength);
for (int i = 0; i < repeat; i++) {
buf.append(str);
}
return buf.toString();
}
}
/**
* 将一个字符串重复N次，并且中间加上指定的分隔符
*
* <pre>
* StringUtil.repeat(null, null, 2) = null
* StringUtil.repeat(null, "x", 2) = null
* StringUtil.repeat("", null, 0) = ""
* StringUtil.repeat("", "", 2) = ""
* StringUtil.repeat("", "x", 3) = "xxx"
* StringUtil.repeat("?", ", ", 3) = "?, ?, ?"
* </pre>
*
* @param str 源字符串
* @param separator 分隔符
* @param repeat 重复次数
* @return String
*/
public static String repeat(String str, String separator, int repeat) {
if (str == null || separator == null) {
return repeat(str, repeat);
} else {
// given that repeat(String, int) is quite optimized, better to rely
// on it than try and splice this into it
String result = repeat(str + separator, repeat);
return removeEnd(result, separator);
}
}
/**
* 将某个字符重复N次.
*
* @param ch 某个字符
* @param repeat 重复次数
* @return String
*/
public static String repeat(char ch, int repeat) {
char[] buf = new char[repeat];
for (int i = repeat - 1; i >= 0; i--) {
buf[i] = ch;
}
return new String(buf);
}
/**
* 字符串长度达不到指定长度时，在字符串右边补指定的字符.
*
* <pre>
* StringUtil.rightPad(null, *, *) = null
* StringUtil.rightPad("", 3, 'z') = "zzz"
* StringUtil.rightPad("bat", 3, 'z') = "bat"
* StringUtil.rightPad("bat", 5, 'z') = "batzz"
* StringUtil.rightPad("bat", 1, 'z') = "bat"
* StringUtil.rightPad("bat", -1, 'z') = "bat"
* </pre>
*
* @param str 源字符串
* @param size 指定的长度
* @param padChar 进行补充的字符
* @return String
*/
public static String rightPad(String str, int size, char padChar) {
if (str == null) {
return null;
}
int pads = size - str.length();
if (pads <= 0) {
return str; // returns original String when possible
}
if (pads > PAD_LIMIT) {
return rightPad(str, size, String.valueOf(padChar));
}
return str.concat(repeat(padChar, pads));
}
/**
* 扩大字符串长度，从左边补充指定字符
*
* <pre>
* StringUtil.rightPad(null, *, *) = null
* StringUtil.rightPad("", 3, "z") = "zzz"
* StringUtil.rightPad("bat", 3, "yz") = "bat"
* StringUtil.rightPad("bat", 5, "yz") = "batyz"
* StringUtil.rightPad("bat", 8, "yz") = "batyzyzy"
* StringUtil.rightPad("bat", 1, "yz") = "bat"
* StringUtil.rightPad("bat", -1, "yz") = "bat"
* StringUtil.rightPad("bat", 5, null) = "bat "
* StringUtil.rightPad("bat", 5, "") = "bat "
* </pre>
*
* @param str 源字符串
* @param size 扩大后的长度
* @param padStr 在右边补充的字符串
* @return String
*/
public static String rightPad(String str, int size, String padStr) {
if (str == null) {
return null;
}
if (isEmpty(padStr)) {
padStr = " ";
}
int padLen = padStr.length();
int strLen = str.length();
int pads = size - strLen;
if (pads <= 0) {
return str; // returns original String when possible
}
if (padLen == 1 && pads <= PAD_LIMIT) {
return rightPad(str, size, padStr.charAt(0));
}
if (pads == padLen) {
return str.concat(padStr);
} else if (pads < padLen) {
return str.concat(padStr.substring(0, pads));
} else {
char[] padding = new char[pads];
char[] padChars = padStr.toCharArray();
for (int i = 0; i < pads; i++) {
padding[i] = padChars[i % padLen];
}
return str.concat(new String(padding));
}
}
/**
* 扩大字符串长度，从左边补充空格
*
* <pre>
* StringUtil.leftPad(null, *) = null
* StringUtil.leftPad("", 3) = " "
* StringUtil.leftPad("bat", 3) = "bat"
* StringUtil.leftPad("bat", 5) = " bat"
* StringUtil.leftPad("bat", 1) = "bat"
* StringUtil.leftPad("bat", -1) = "bat"
* </pre>
*
* @param str 源字符串
* @param size 扩大后的长度
* @return String
*/
public static String leftPad(String str, int size) {
return leftPad(str, size, ' ');
}
/**
* 扩大字符串长度，从左边补充指定的字符
*
* <pre>
* StringUtil.leftPad(null, *, *) = null
* StringUtil.leftPad("", 3, 'z') = "zzz"
* StringUtil.leftPad("bat", 3, 'z') = "bat"
* StringUtil.leftPad("bat", 5, 'z') = "zzbat"
* StringUtil.leftPad("bat", 1, 'z') = "bat"
* StringUtil.leftPad("bat", -1, 'z') = "bat"
* </pre>
*
* @param str 源字符串
* @param size 扩大后的长度
* @param padStr 补充的字符
* @return String
*/
public static String leftPad(String str, int size, char padChar) {
if (str == null) {
return null;
}
int pads = size - str.length();
if (pads <= 0) {
return str; // returns original String when possible
}
if (pads > PAD_LIMIT) {
return leftPad(str, size, String.valueOf(padChar));
}
return repeat(padChar, pads).concat(str);
}
/**
* 扩大字符串长度，从左边补充指定的字符
*
* <pre>
* StringUtil.leftPad(null, *, *) = null
* StringUtil.leftPad("", 3, "z") = "zzz"
* StringUtil.leftPad("bat", 3, "yz") = "bat"
* StringUtil.leftPad("bat", 5, "yz") = "yzbat"
* StringUtil.leftPad("bat", 8, "yz") = "yzyzybat"
* StringUtil.leftPad("bat", 1, "yz") = "bat"
* StringUtil.leftPad("bat", -1, "yz") = "bat"
* StringUtil.leftPad("bat", 5, null) = " bat"
* StringUtil.leftPad("bat", 5, "") = " bat"
* </pre>
*
* @param str 源字符串
* @param size 扩大后的长度
* @param padStr 补充的字符串
* @return String
*/
public static String leftPad(String str, int size, String padStr) {
if (str == null) {
return null;
}
if (isEmpty(padStr)) {
padStr = " ";
}
int padLen = padStr.length();
int strLen = str.length();
int pads = size - strLen;
if (pads <= 0) {
return str; // returns original String when possible
}
if (padLen == 1 && pads <= PAD_LIMIT) {
return leftPad(str, size, padStr.charAt(0));
}
if (pads == padLen) {
return padStr.concat(str);
} else if (pads < padLen) {
return padStr.substring(0, pads).concat(str);
} else {
char[] padding = new char[pads];
char[] padChars = padStr.toCharArray();
for (int i = 0; i < pads; i++) {
padding[i] = padChars[i % padLen];
}
return new String(padding).concat(str);
}
}
/**
* 扩大字符串长度并将现在的字符串居中，被扩大部分用空格填充。
*
* <pre>
* StringUtil.center(null, *) = null
* StringUtil.center("", 4) = " "
* StringUtil.center("ab", -1) = "ab"
* StringUtil.center("ab", 4) = " ab "
* StringUtil.center("abcd", 2) = "abcd"
* StringUtil.center("a", 4) = " a "
* </pre>
*
* @param str 源字符串
* @param size 扩大后的长度
* @return String
*/
public static String center(String str, int size) {
return center(str, size, ' ');
}
/**
* 将字符串长度修改为指定长度，并进行居中显示。
*
* <pre>
* StringUtil.center(null, *, *) = null
* StringUtil.center("", 4, ' ') = " "
* StringUtil.center("ab", -1, ' ') = "ab"
* StringUtil.center("ab", 4, ' ') = " ab"
* StringUtil.center("abcd", 2, ' ') = "abcd"
* StringUtil.center("a", 4, ' ') = " a "
* StringUtil.center("a", 4, 'y') = "yayy"
* </pre>
*
* @param str 源字符串
* @param size 指定的长度
* @param padChar 长度不够时补充的字符串
* @return String
* @throws IllegalArgumentException 如果被补充字符串为 null或者 empty
*/
public static String center(String str, int size, char padChar) {
if (str == null || size <= 0) {
return str;
}
int strLen = str.length();
int pads = size - strLen;
if (pads <= 0) {
return str;
}
str = leftPad(str, strLen + pads / 2, padChar);
str = rightPad(str, size, padChar);
return str;
}
/**
* 将字符串长度修改为指定长度，并进行居中显示。
*
* <pre>
* StringUtil.center(null, *, *) = null
* StringUtil.center("", 4, " ") = " "
* StringUtil.center("ab", -1, " ") = "ab"
* StringUtil.center("ab", 4, " ") = " ab"
* StringUtil.center("abcd", 2, " ") = "abcd"
* StringUtil.center("a", 4, " ") = " a "
* StringUtil.center("a", 4, "yz") = "yayz"
* StringUtil.center("abc", 7, null) = " abc "
* StringUtil.center("abc", 7, "") = " abc "
* </pre>
*
* @param str 源字符串
* @param size 指定的长度
* @param padStr 长度不够时补充的字符串
* @return String
* @throws IllegalArgumentException 如果被补充字符串为 null或者 empty
*/
public static String center(String str, int size, String padStr) {
if (str == null || size <= 0) {
return str;
}
if (isEmpty(padStr)) {
padStr = " ";
}
int strLen = str.length();
int pads = size - strLen;
if (pads <= 0) {
return str;
}
str = leftPad(str, strLen + pads / 2, padStr);
str = rightPad(str, size, padStr);
return str;
}
/**
* 检查字符串是否全部为小写.
*
* <pre>
* StringUtil.isAllLowerCase(null) = false
* StringUtil.isAllLowerCase("") = false
* StringUtil.isAllLowerCase(" ") = false
* StringUtil.isAllLowerCase("abc") = true
* StringUtil.isAllLowerCase("abC") = false
* </pre>
*
* @param cs 源字符串
* @return String
*/
public static boolean isAllLowerCase(String cs) {
if (cs == null || isEmpty(cs)) {
return false;
}
int sz = cs.length();
for (int i = 0; i < sz; i++) {
if (!Character.isLowerCase(cs.charAt(i))) {
return false;
}
}
return true;
}
/**
* 检查是否都是大写.
*
* <pre>
* StringUtil.isAllUpperCase(null) = false
* StringUtil.isAllUpperCase("") = false
* StringUtil.isAllUpperCase(" ") = false
* StringUtil.isAllUpperCase("ABC") = true
* StringUtil.isAllUpperCase("aBC") = false
* </pre>
*
* @param cs 源字符串
* @return String
*/
public static boolean isAllUpperCase(String cs) {
if (cs == null || StringUtil.isEmpty(cs)) {
return false;
}
int sz = cs.length();
for (int i = 0; i < sz; i++) {
if (!Character.isUpperCase(cs.charAt(i))) {
return false;
}
}
return true;
}
/**
* 反转字符串.
*
* <pre>
* StringUtil.reverse(null) = null
* StringUtil.reverse("") = ""
* StringUtil.reverse("bat") = "tab"
* </pre>
*
* @param str 源字符串
* @return String
*/
public static String reverse(String str) {
if (str == null) {
return null;
}
return new StringBuilder(str).reverse().toString();
}
/**
* 字符串达不到一定长度时在右边补空白.
*
* <pre>
* StringUtil.rightPad(null, *) = null
* StringUtil.rightPad("", 3) = " "
* StringUtil.rightPad("bat", 3) = "bat"
* StringUtil.rightPad("bat", 5) = "bat "
* StringUtil.rightPad("bat", 1) = "bat"
* StringUtil.rightPad("bat", -1) = "bat"
* </pre>
*
* @param str 源字符串
* @param size 指定的长度
* @return String
*/
public static String rightPad(String str, int size) {
return rightPad(str, size, ' ');
}
/**
* 从右边截取字符串.</p>
*
* <pre>
* StringUtil.right(null, *) = null
* StringUtil.right(*, -ve) = ""
* StringUtil.right("", *) = ""
* StringUtil.right("abc", 0) = ""
* StringUtil.right("abc", 2) = "bc"
* StringUtil.right("abc", 4) = "abc"
* </pre>
*
* @param str 源字符串
* @param len 长度
* @return String
*/
public static String right(String str, int len) {
if (str == null) {
return null;
}
if (len < 0) {
return EMPTY;
}
if (str.length() <= len) {
return str;
}
return str.substring(str.length() - len);
}
/**
* 截取一个字符串的前几个.
*
* <pre>
* StringUtil.left(null, *) = null
* StringUtil.left(*, -ve) = ""
* StringUtil.left("", *) = ""
* StringUtil.left("abc", 0) = ""
* StringUtil.left("abc", 2) = "ab"
* StringUtil.left("abc", 4) = "abc"
* </pre>
*
* @param str 源字符串
* @param len 截取的长度
* @return the String
*/
public static String left(String str, int len) {
if (str == null) {
return null;
}
if (len < 0) {
return EMPTY;
}
if (str.length() <= len) {
return str;
}
return str.substring(0, len);
}
/**
* 得到tag字符串中间的子字符串，只返回第一个匹配项。
*
* <pre>
* StringUtil.substringBetween(null, *) = null
* StringUtil.substringBetween("", "") = ""
* StringUtil.substringBetween("", "tag") = null
* StringUtil.substringBetween("tagabctag", null) = null
* StringUtil.substringBetween("tagabctag", "") = ""
* StringUtil.substringBetween("tagabctag", "tag") = "abc"
* </pre>
*
* @param str 源字符串。
* @param tag 标识字符串。
* @return String 子字符串, 如果没有符合要求的，返回{@code null}。
*/
public static String substringBetween(String str, String tag) {
return substringBetween(str, tag, tag);
}
/**
* 得到两个字符串中间的子字符串，只返回第一个匹配项。
*
* <pre>
* StringUtil.substringBetween("wx[b]yz", "[", "]") = "b"
* StringUtil.substringBetween(null, *, *) = null
* StringUtil.substringBetween(*, null, *) = null
* StringUtil.substringBetween(*, *, null) = null
* StringUtil.substringBetween("", "", "") = ""
* StringUtil.substringBetween("", "", "]") = null
* StringUtil.substringBetween("", "[", "]") = null
* StringUtil.substringBetween("yabcz", "", "") = ""
* StringUtil.substringBetween("yabcz", "y", "z") = "abc"
* StringUtil.substringBetween("yabczyabcz", "y", "z") = "abc"
* </pre>
*
* @param str 源字符串
* @param open 起字符串。
* @param close 末字符串。
* @return String 子字符串, 如果没有符合要求的，返回{@code null}。
*/
public static String substringBetween(String str, String open, String close) {
if (str == null || open == null || close == null) {
return null;
}
int start = str.indexOf(open);
if (start != INDEX_NOT_FOUND) {
int end = str.indexOf(close, start + open.length());
if (end != INDEX_NOT_FOUND) {
return str.substring(start + open.length(), end);
}
}
return null;
}
/**
* 得到两个字符串中间的子字符串，所有匹配项组合为数组并返回。
*
* <pre>
* StringUtil.substringsBetween("[a][b][c]", "[", "]") = ["a","b","c"]
* StringUtil.substringsBetween(null, *, *) = null
* StringUtil.substringsBetween(*, null, *) = null
* StringUtil.substringsBetween(*, *, null) = null
* StringUtil.substringsBetween("", "[", "]") = []
* </pre>
*
* @param str 源字符串
* @param open 起字符串。
* @param close 末字符串。
* @return String 子字符串数组, 如果没有符合要求的，返回{@code null}。
*/
public static String[] substringsBetween(String str, String open, String close) {
if (str == null || isEmpty(open) || isEmpty(close)) {
return null;
}
int strLen = str.length();
if (strLen == 0) {
return new String[0];
}
int closeLen = close.length();
int openLen = open.length();
List<String> list = new ArrayList<String>();
int pos = 0;
while (pos < strLen - closeLen) {
int start = str.indexOf(open, pos);
if (start < 0) {
break;
}
start += openLen;
int end = str.indexOf(close, start);
if (end < 0) {
break;
}
list.add(str.substring(start, end));
pos = end + closeLen;
}
if (list.isEmpty()) {
return null;
}
return list.toArray(new String[list.size()]);
}
/**
* 功能：切换字符串中的所有字母大小写。<br/>
*
* <pre>
* StringUtil.swapCase(null) = null
* StringUtil.swapCase("") = ""
* StringUtil.swapCase("The dog has a BONE") = "tHE DOG HAS A bone"
* </pre>
*
* @param str 源字符串
* @return String
*/
public static String swapCase(String str) {
if (StringUtil.isEmpty(str)) {
return str;
}
char[] buffer = str.toCharArray();
boolean whitespace = true;
for (int i = 0; i < buffer.length; i++) {
char ch = buffer[i];
if (Character.isUpperCase(ch)) {
buffer[i] = Character.toLowerCase(ch);
whitespace = false;
} else if (Character.isTitleCase(ch)) {
buffer[i] = Character.toLowerCase(ch);
whitespace = false;
} else if (Character.isLowerCase(ch)) {
if (whitespace) {
buffer[i] = Character.toTitleCase(ch);
whitespace = false;
} else {
buffer[i] = Character.toUpperCase(ch);
}
} else {
whitespace = Character.isWhitespace(ch);
}
}
return new String(buffer);
}
/**
* 功能：截取出最后一个标志位之后的字符串.<br/>
* 如果sourceStr为empty或者expr为null，直接返回源字符串。<br/>
* 如果expr长度为0，直接返回sourceStr。<br/>
* 如果expr在sourceStr中不存在，直接返回sourceStr。<br/>
*
* @param sourceStr 被截取的字符串
* @param expr 分隔符
* @return String
*/
public static String substringAfterLast(String sourceStr, String expr) {
if (isEmpty(sourceStr) || expr == null) {
return sourceStr;
}
if (expr.length() == 0) {
return sourceStr;
}
int pos = sourceStr.lastIndexOf(expr);
if (pos == -1) {
return sourceStr;
}
return sourceStr.substring(pos + expr.length());
}
/**
* 功能：截取出最后一个标志位之前的字符串.<br/>
* 如果sourceStr为empty或者expr为null，直接返回源字符串。<br/>
* 如果expr长度为0，直接返回sourceStr。<br/>
* 如果expr在sourceStr中不存在，直接返回sourceStr。<br/>
*
* @param sourceStr 被截取的字符串
* @param expr 分隔符
* @return String
*/
public static String substringBeforeLast(String sourceStr, String expr) {
if (isEmpty(sourceStr) || expr == null) {
return sourceStr;
}
if (expr.length() == 0) {
return sourceStr;
}
int pos = sourceStr.lastIndexOf(expr);
if (pos == -1) {
return sourceStr;
}
return sourceStr.substring(0, pos);
}
/**
* 功能：截取出第一个标志位之后的字符串.<br/>
* 如果sourceStr为empty或者expr为null，直接返回源字符串。<br/>
* 如果expr长度为0，直接返回sourceStr。<br/>
* 如果expr在sourceStr中不存在，直接返回sourceStr。<br/>
*
* @param sourceStr 被截取的字符串
* @param expr 分隔符
* @return String
*/
public static String substringAfter(String sourceStr, String expr) {
if (isEmpty(sourceStr) || expr == null) {
return sourceStr;
}
if (expr.length() == 0) {
return sourceStr;
}
int pos = sourceStr.indexOf(expr);
if (pos == -1) {
return sourceStr;
}
return sourceStr.substring(pos + expr.length());
}
/**
* 功能：截取出第一个标志位之前的字符串.<br/>
* 如果sourceStr为empty或者expr为null，直接返回源字符串。<br/>
* 如果expr长度为0，直接返回sourceStr。<br/>
* 如果expr在sourceStr中不存在，直接返回sourceStr。<br/>
* 如果expr在sourceStr中存在不止一个，以第一个位置为准。
*
* @param sourceStr 被截取的字符串
* @param expr 分隔符
* @return String
*/
public static String substringBefore(String sourceStr, String expr) {
if (isEmpty(sourceStr) || expr == null) {
return sourceStr;
}
if (expr.length() == 0) {
return sourceStr;
}
int pos = sourceStr.indexOf(expr);
if (pos == -1) {
return sourceStr;
}
return sourceStr.substring(0, pos);
}
/**
* 功能：检查这个字符串是不是空字符串。<br/>
* 如果这个字符串为null或者trim后为空字符串则返回true，否则返回false。
*
* @param chkStr 被检查的字符串
* @return boolean
*/
public static boolean isEmpty(String chkStr) {
if (chkStr == null) {
return true;
} else {
return "".equals(chkStr.trim()) ? true : false;
}
}
/**
* 如果字符串没有超过最长显示长度返回原字符串，否则从开头截取指定长度并加...返回。
*
* @param str 原字符串
* @param length 字符串最长显示的长度
* @return 转换后的字符串
*/
public static String trimString(String str, int length) {
if (str == null) {
return "";
} else if (str.length() > length) {
return str.substring(0, length - 3) + "...";
} else {
return str;
}
}
/**
* 替换字符串
*
* @param from String 原始字符串
* @param to String 目标字符串
* @param source String 母字符串
* @return String 替换后的字符串
*/
public static String replace(String from, String to, String source) {
if (source == null || from == null || to == null)
return null;
StringBuffer bf = new StringBuffer("");
int index = -1;
while ((index = source.indexOf(from)) != -1) {
bf.append(source.substring(0, index) + to);
source = source.substring(index + from.length());
index = source.indexOf(from);
}
bf.append(source);
return bf.toString();
}
/**
* 替换字符串，能能够在HTML页面上直接显示(替换双引号和小于号)
*
* @param str String 原始字符串
* @return String 替换后的字符串
*/
public static String htmlencode(String str) {
if (str == null) {
return null;
}
return replace("\"", """, replace("<", "<", str));
}
/**
* 替换字符串，将被编码的转换成原始码（替换成双引号和小于号）
*
* @param str String
* @return String
*/
public static String htmldecode(String str) {
if (str == null) {
return null;
}
return replace(""", "\"", replace("<", "<", str));
}
private static final String _BR = "<br/>";
/**
* 在页面上直接显示文本内容，替换小于号，空格，回车，TAB
*
* @param str String 原始字符串
* @return String 替换后的字符串
*/
public static String htmlshow(String str) {
if (str == null) {
return null;
}
str = replace("<", "<", str);
str = replace(" ", " ", str);
str = replace("\r\n", _BR, str);
str = replace("\n", _BR, str);
str = replace("\t", " ", str);
return str;
}
/**
* 返回指定字节长度的字符串
*
* @param str String 字符串
* @param length int 指定长度
* @return String 返回的字符串
*/
public static String toLength(String str, int length) {
if (str == null) {
return null;
}
if (length <= 0) {
return "";
}
try {
if (str.getBytes("GBK").length <= length) {
return str;
}
} catch (Exception ex) {
}
StringBuffer buff = new StringBuffer();
int index = 0;
char c;
length -= 3;
while (length > 0) {
c = str.charAt(index);
if (c < 128) {
length--;
} else {
length--;
length--;
}
buff.append(c);
index++;
}
buff.append("...");
return buff.toString();
}
/**
* 判断是不是合法字符 c 要判断的字符
*/
public static boolean isLetter(String c) {
boolean result = false;
if (c == null || c.length() < 0) {
return false;
}
// a-z
if (c.compareToIgnoreCase("a") >= 0 && c.compareToIgnoreCase("z") <= 0) {
return true;
}
// 0-9
if (c.compareToIgnoreCase("0") >= 0 && c.compareToIgnoreCase("9") <= 0) {
return true;
}
// . - _
if (c.equals(".") || c.equals("-") || c.equals("_")) {
return true;
}
return result;
}
/**
* @param source 源字符
* @param charset 源字符编码
* @return
*/
public static String decodeUTF8(String source, String charset) {
try {
return new String(source.getBytes(charset), "UTF-8");
} catch (Exception E) {
}
return source;
}
/**
* 人民币转成大写
*
* @param value
* @return String
*/
public static String hangeToBig(double value) {
char[] hunit = {'拾', '佰', '仟'}; // 段内位置表示
char[] vunit = {'万', '亿'}; // 段名表示
char[] digit = {'零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖'}; // 数字表示
long midVal = (long) (value * 100); // 转化成整形
String valStr = String.valueOf(midVal); // 转化成字符串
String head = valStr.substring(0, valStr.length() - 2); // 取整数部分
String rail = valStr.substring(valStr.length() - 2); // 取小数部分
String prefix = ""; // 整数部分转化的结果
String suffix = ""; // 小数部分转化的结果
// 处理小数点后面的数
if (rail.equals("00")) { // 如果小数部分为0
suffix = "整";
} else {
suffix = digit[rail.charAt(0) - '0'] + "角" + digit[rail.charAt(1) - '0'] + "分"; // 否则把角分转化出来
}
// 处理小数点前面的数
char[] chDig = head.toCharArray(); // 把整数部分转化成字符数组
char zero = '0'; // 标志'0'表示出现过0
byte zeroSerNum = 0; // 连续出现0的次数
for (int i = 0; i < chDig.length; i++) { // 循环处理每个数字
int idx = (chDig.length - i - 1) % 4; // 取段内位置
int vidx = (chDig.length - i - 1) / 4; // 取段位置
if (chDig[i] == '0') { // 如果当前字符是0
zeroSerNum++; // 连续0次数递增
if (zero == '0') { // 标志
zero = digit[0];
} else if (idx == 0 && vidx > 0 && zeroSerNum < 4) {
prefix += vunit[vidx - 1];
zero = '0';
}
continue;
}
zeroSerNum = 0; // 连续0次数清零
if (zero != '0') { // 如果标志不为0,则加上,例如万,亿什么的
prefix += zero;
zero = '0';
}
prefix += digit[chDig[i] - '0']; // 转化该数字表示
if (idx > 0)
prefix += hunit[idx - 1];
if (idx == 0 && vidx > 0) {
prefix += vunit[vidx - 1]; // 段结束位置应该加上段名如万,亿
}
}
if (prefix.length() > 0)
prefix += '圆'; // 如果整数部分存在,则有圆的字样
return prefix + suffix; // 返回正确表示
}
// 过滤特殊字符
public static String encoding(String src) {
if (src == null)
return "";
StringBuilder result = new StringBuilder();
if (src != null) {
src = src.trim();
for (int pos = 0; pos < src.length(); pos++) {
switch (src.charAt(pos)) {
case '\"':
result.append(""");
break;
case '<':
result.append("<");
break;
case '>':
result.append(">");
break;
case '\'':
result.append("'");
break;
case '&':
result.append("&");
break;
case '%':
result.append("&pc;");
break;
case '_':
result.append("&ul;");
break;
case '#':
result.append("&shap;");
break;
case '?':
result.append("&ques;");
break;
default:
result.append(src.charAt(pos));
break;
}
}
}
return result.toString();
}
// 反过滤特殊字符
public static String decoding(String src) {
if (src == null)
return "";
String result = src;
result = result.replace(""", "\"").replace("'", "\'");
result = result.replace("<", "<").replace(">", ">");
result = result.replace("&", "&");
result = result.replace("&pc;", "%").replace("&ul", "_");
result = result.replace("&shap;", "#").replace("&ques", "?");
return result;
}
}
