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474 lines (405 loc) · 11.7 KB
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package common.utils;
import common.enumeration.errorMessageEnum.ErrorMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.UnsupportedEncodingException;
import java.util.List;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* create by mulin on 2018/09/07
* This class is mainly used for operations related to strings.
*/
public class StringUtil {
private static Logger log = LoggerFactory.getLogger(StringUtil.class);
/*
String segmentation. -------------------------------
*/
/**
* 根据逗号分割字符串
*
* @param str
* @return String[]
*/
public static String[] splitStringByComma(String str) {
if(StringUtil.isEmpty(str)) {
throw new NullPointerException(ErrorMessage.PARAMETER_EMPTY_ERROR.getErrorInfo());
}
return str.split(",");
}
/**
* 根据小数点分割字符串
*
* @param str
* @return String[]
*/
public static String[] splitStringByPoint(String str) {
if(StringUtil.isEmpty(str)) {
throw new NullPointerException(ErrorMessage.PARAMETER_EMPTY_ERROR.getErrorInfo());
}
return str.split("\\.");
}
/**
* 根据空格(一个或多个)分割字符串
*
* @param str
* @return String[]
*/
public static String[] splitStringBySpace(String str) {
if(StringUtil.isEmpty(str)) {
throw new NullPointerException(ErrorMessage.PARAMETER_EMPTY_ERROR.getErrorInfo());
}
return str.split("\\s+");
}
/**
* 根据分号分割字符串
*
* @param str
* @return String[]
*/
public static String[] splitStringBySemicolon(String str) {
if(StringUtil.isEmpty(str)) {
throw new NullPointerException(ErrorMessage.PARAMETER_EMPTY_ERROR.getErrorInfo());
}
return str.split(";");
}
/**
* 根据冒号分割字符串
*
* @param str
* @return String[]
*/
public static String[] splitStringByColon(String str) {
if(StringUtil.isEmpty(str)) {
throw new NullPointerException(ErrorMessage.PARAMETER_EMPTY_ERROR.getErrorInfo());
}
return str.split(":");
}
/**
* 根据自定义的正则分割字符串
*
* @param str
* @return String[]
*/
public static String[] splitStringCustomized(String str, String regex) {
if(StringUtil.isEmpty(str)) {
throw new NullPointerException(ErrorMessage.PARAMETER_EMPTY_ERROR.getErrorInfo());
}
return str.split(regex);
}
/**
* 过滤掉所有空白字符
*
* @param str
* @return
*/
public static String trimAll(String str) {
return str.replaceAll("\\s*", "");
}
/**
* 空格与特殊字符的过滤
* 过滤掉所有空格、换行、特殊符号。
* @param str
* @return
*/
public static String validateString(String str) {
return validateStringByChar(str, false);
}
/**
* 空格与特殊字符的过滤
*
* @param str
* @param allowChar true为允许特殊字符的存在 false为不允许特殊字符的存在
* @return
*/
public static String validateStringByChar(String str, Boolean allowChar) {
if (!isEmpty(str)) {
Pattern p = Pattern.compile("\\s|\t|\r|\n");
Matcher m = p.matcher(str);
str = m.replaceAll("");
if (!allowChar) {
String regEx = "[`~!@#$%^&*()+=|{}':;,\\[\\].<>/?~！@#￥%……&*（）——+|{}\\\\【】‘；：”“’。，、？\'\"]";
Pattern p1 = Pattern.compile(regEx);
Matcher m1 = p1.matcher(str);
return m1.replaceAll("").trim();
} else {
return str.trim();
}
}
return null;
}
/**
* 空格与特殊字符的过滤
*
* @param str
* @param allowBlank true为字符串中间允许空格的存在 false为不允许空格的存在
* @return
*/
public static String validateStringByBlank(String str, boolean allowBlank) {
if (str != null) {
if (!allowBlank) {
Pattern p = Pattern.compile("\\s*|\t|\r|\n");
Matcher m = p.matcher(str);
str = m.replaceAll("");
}
String regEx = "[`~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。，、？]";
Pattern p1 = Pattern.compile(regEx);
Matcher m1 = p1.matcher(str);
str = m1.replaceAll("").trim();
}
return str;
}
/*
String segmentation. -------------------------------
*/
/**
* 获取字符串str后number个字符
*
* @param str
* @param number
* @return String
*/
public static String getStartingChars(String str, int number) {
if (isEmpty(str)) {
return null;
}
String string = str.trim();
if (str.length() <= number) {
log.info(ErrorMessage.PATAMETER_NUMBER_TOO_LARGE.getErrorInfo());
return str;
}
return string.substring(0, number);
}
/**
* 获取字符串str前number个字符
*
* @param str
* @param number
* @return String
*/
public static String getLastChars(String str, int number) {
if (isEmpty(str)) {
return null;
}
String string = str.trim();
if (str.length() <= number) {
log.info(ErrorMessage.PATAMETER_NUMBER_TOO_LARGE.getErrorInfo());
return str;
}
return string.substring(string.length() - number, string.length());
}
/**
* 获取字符串str前len位数
*
* @param str
* @param length
* @return String
*/
public static String getStartingString(String str, int length) {
if (isEmpty(str)) {
return null;
}
if (length <= 0) {
return "";
}
if (str.length() <= length) {
log.error(ErrorMessage.PATAMETER_LENGTH_TOO_LARGE.getErrorInfo());
return str;
} else {
return str.substring(0, length);
}
}
/**
* 获取字符串str后len位数
*
* @param str
* @param len
* @return String
*/
public static String getLastString(String str, int len) {
if (isEmpty(str)) {
return null;
}
if (len <= 0) {
return "";
}
if (str.length() <= len) {
log.error(ErrorMessage.PATAMETER_LENGTH_TOO_LARGE.getErrorInfo());
return str;
} else {
return str.substring(str.length() - len, str.length());
}
}
/**
* 控制字符串长度在maxLength内
*
* @param str
* @param maxLength
* @return String
*/
public static String noMoreThan(String str, Integer maxLength) {
if (str == null) {
return null;
}
if (str.length() > maxLength) {
return str.substring(0, maxLength);
}
return str;
}
/*
Other common methods for strings. -------------------------------
*/
/**
* 是否为条形码的判断
*
* @param str
* @return
*/
public static Boolean isBarcode(String str) {
Pattern p = null;
Matcher m = null;
boolean b = false;
// 验证条形码
p = Pattern.compile("[A-Za-z0-9]+");
m = p.matcher(str);
b = m.matches();
return b;
}
/**
* 是否该字段里只有中英文和数字
*
* @param str 需要校验字段
* @return 返回true/false
*/
public static boolean isLetterDigitChinese(String str) {
for (char c : str.toCharArray()) {
if (!isLetterDigitChinese(c)) {
return false;
}
}
return true;
}
/**
* 是否是字母、数字、中文的判断
* @param c
* @return boolean
*/
private static boolean isLetterDigitChinese(char c) {
// 中文
Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
|| ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B
|| ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS
|| ub == Character.UnicodeBlock.GENERAL_PUNCTUATION) {
return true;
}
// 字母
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
return true;
}
// 数字
return Character.isDigit(c);
}
/**
* 首字母变小写
*/
public static String firstCharToLowerCase(String str) {
Character firstChar = str.charAt(0);
String tail = str.substring(1);
str = Character.toLowerCase(firstChar) + tail;
return str;
}
/**
* 首字母变大写
*/
public static String firstCharToUpperCase(String str) {
Character firstChar = str.charAt(0);
String tail = str.substring(1);
str = Character.toUpperCase(firstChar) + tail;
return str;
}
/**
* 使用给定的 charset 将此 String 编码到 byte 序列，并将结果存储到新的 byte 数组。
*
* @param content 字符串对象
* @param charset 编码方式
* @return 所得 byte 数组
*/
public static byte[] getContentBytes(String content, String charset) {
if (charset == null || "".equals(charset)) {
return content.getBytes();
}
try {
return content.getBytes(charset);
} catch (UnsupportedEncodingException ex) {
throw new IllegalArgumentException("Not support:" + charset, ex);
}
}
/**
* 判断字符串是否被包含于Set集合中
*
* @param s
* @param set
* @return boolean
*/
public static boolean isContainsForSet(String s, Set<String> set) {
for (String element : set) {
if (element.contains(s)) {
return true;
}
}
return false;
}
/**
* 判断字符串是否被包含于List集合中
*
* @param s
* @param list
* @return boolean
*/
public static boolean isContainsForList(String s, List<String> list) {
for (String element : list) {
if (element.contains(s)) {
return true;
}
}
return false;
}
/**
* 判断两字符串是否相同
* Strings equality check are case insensitive.
*
* @param str1
* @param str2
* @return true if equal else false
*/
public static boolean isEqualIgnoreCase(String str1, String str2) {
return str1.trim().equalsIgnoreCase(str2.trim());
}
/**
* 字符串拼加
*
* @param stringBuilder
* @param strToAppend
* @return
*/
public static StringBuilder appendIfNotNull(StringBuilder stringBuilder, String strToAppend) {
if (stringBuilder == null) {
return null;
}
if (strToAppend != null) {
stringBuilder.append(", ").append(strToAppend);
}
return stringBuilder;
}
/**
* 判空
*
* @param str
* @return boolean
*/
public static boolean isEmpty(String str) {
return (str == null) || str.trim().equals("");
}
}