com.diboot.core.util.S Maven / Gradle / Ivy
/*
* Copyright (c) 2015-2020, www.dibo.ltd ([email protected]).
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.diboot.core.util;
import com.diboot.core.config.BaseConfig;
import com.diboot.core.config.Cons;
import org.apache.commons.lang3.StringUtils;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.*;
/***
* String 操作类
* @author [email protected]
* @version v2.0
* @date 2019/01/01
*/
@SuppressWarnings({"JavaDoc", "unused"})
public class S extends StringUtils{
/***
* 默认分隔符 ,
*/
public static final String SEPARATOR = Cons.SEPARATOR_COMMA;
/***
* 裁剪字符串，显示前部分+...
* @param input
* @return
*/
public static String cut(String input){
return cut(input, BaseConfig.getCutLength());
}
/***
* 裁剪字符串，显示前部分+...
* @param input
* @return
*/
public static String cut(String input, int cutLength){
return substring(input, 0, cutLength);
}
/***
* 将list拼接成string，默认分隔符:,
* @param stringList
* @return
*/
public static String join(Iterable stringList){
return StringUtils.join(stringList, SEPARATOR);
}
/***
* 将list拼接成string，默认分隔符:,
* @param stringArray
* @return
*/
public static String join(String[] stringArray){
return StringUtils.join(stringArray, SEPARATOR);
}
/***
* 按,拆分字符串
* @param joinedStr
* @return
*/
public static String[] split(String joinedStr){
if(joinedStr == null){
return null;
}
return joinedStr.split(SEPARATOR);
}
private static final String[] SEARCH_LIST = {"[", "]", "\"", "\'"};
private static final String[] REPLACE_LIST = {"", "", "", ""};
/**
* 清除非常量标识符： json标识 []"'等
* @param inputJsonStr
* @return
*/
public static String clearNonConst(String inputJsonStr) {
return S.replaceEach(inputJsonStr, SEARCH_LIST, REPLACE_LIST);
}
/***
* 转换为String数组（避免转型异常）
* @param stringList
* @return
*/
public static String[] toStringArray(List stringList){
return stringList.toArray(new String[0]);
}
/***
* 按,拆分字符串并转换为 List
* @param joinedStr
* @return
*/
public static List splitToList(String joinedStr){
return splitToList(joinedStr, SEPARATOR);
}
/***
* 按,拆分字符串并转换为 List
* @param joinedStr
* @return
*/
public static List splitToList(String joinedStr, String separator){
if(joinedStr == null){
return null;
}
return Arrays.asList(joinedStr.split(separator));
}
/***
* 转换成蛇形命名（用于Java属性转换为数据库列名）
* @param camelCaseStrArray
* @return
*/
public static String[] toSnakeCase(String[] camelCaseStrArray){
if(camelCaseStrArray == null){
return null;
}
String[] snakeCaseArray = new String[camelCaseStrArray.length];
for(int i=0; i toSnakeCase(List camelCaseStrArray){
if(camelCaseStrArray == null){
return null;
}
List snakeCaseList = new ArrayList<>(camelCaseStrArray.size());
for(String camelCaseStr : camelCaseStrArray){
snakeCaseList.add(toSnakeCase(camelCaseStr));
}
return snakeCaseList;
}
/***
* 转换成小写蛇形命名（用于Java属性转换为小写数据库列名）
* @param camelCaseStr
* @return
*/
public static String toSnakeCase(String camelCaseStr){
if(V.isEmpty(camelCaseStr)){
return null;
}
// 全小写
if(camelCaseStr.toLowerCase().equals(camelCaseStr)){
return camelCaseStr;
}
// 全大写直接return小写
if(camelCaseStr.toUpperCase().equals(camelCaseStr)){
return camelCaseStr.toLowerCase();
}
// 大小写混合，则遇“大写”转换为“_小写”
char[] chars = camelCaseStr.toCharArray();
StringBuilder sb = new StringBuilder();
for (char c : chars){
if(Character.isUpperCase(c)){
if(sb.length() > 0){
sb.append(Cons.SEPARATOR_UNDERSCORE);
}
}
sb.append(Character.toLowerCase(c));
}
return sb.toString();
}
/***
* 转换成首字母小写的驼峰命名（用于数据库列名转换为Java属性）
* @param snakeCaseStr
* @return
*/
public static String toLowerCaseCamel(String snakeCaseStr){
if(V.isEmpty(snakeCaseStr)){
return null;
}
// 不包含_
if(!snakeCaseStr.contains(Cons.SEPARATOR_UNDERSCORE)){
// 全大写直接return小写
if(snakeCaseStr.toUpperCase().equals(snakeCaseStr)){
return snakeCaseStr.toLowerCase();
}
// 其他return 首字母小写
else{
return uncapFirst(snakeCaseStr);
}
}
// 包含_
StringBuilder sb = null;
String[] words = snakeCaseStr.split(Cons.SEPARATOR_UNDERSCORE);
for(String word : words){
if(V.isEmpty(word)){
continue;
}
if(sb == null){
sb = new StringBuilder(word.toLowerCase());
}
else{
sb.append(word.substring(0, 1).toUpperCase()).append(word.substring(1).toLowerCase());
}
}
if (snakeCaseStr.endsWith(Cons.SEPARATOR_UNDERSCORE) && sb != null) {
sb.append(Cons.SEPARATOR_UNDERSCORE);
}
return sb != null? sb.toString() : null;
}
/***
* 转换为Long类型（判空，避免NPE）
* @param strValue
* @return
*/
public static Long toLong(String strValue){
return toLong(strValue, null);
}
/***
* 转换为Long类型（判空，避免NPE）
* @param strValue 字符类型值
* @param defaultLong 默认值
* @return
*/
public static Long toLong(String strValue, Long defaultLong){
if(V.isEmpty(strValue)){
return defaultLong;
}
return Long.parseLong(strValue);
}
/***
* 转换为Integer类型(判空，避免NPE)
* @param strValue
* @return
*/
public static Integer toInt(String strValue){
return toInt(strValue, null);
}
/***
* 转换为Integer类型(判空，避免NPE)
* @param strValue
* @param defaultInt 默认值
* @return
*/
public static Integer toInt(String strValue, Integer defaultInt){
if(V.isEmpty(strValue)){
return defaultInt;
}
return Integer.parseInt(strValue);
}
/***
* 字符串转换为boolean
* @param strValue
* @return
*/
public static boolean toBoolean(String strValue){
return toBoolean(strValue, false);
}
/***
* 字符串转换为boolean
* @param strValue
* @param defaultBoolean
* @return
*/
public static boolean toBoolean(String strValue, boolean defaultBoolean){
if(V.notEmpty(strValue)){
return V.isTrue(strValue);
}
return defaultBoolean;
}
/***
* 将多个空格替换为一个
* @param input
* @return
*/
public static String removeDuplicateBlank(String input){
if(V.isEmpty(input)){
return input;
}
return input.trim().replaceAll(" +", " ");
}
/**
* 获得随机串
* @return
*/
public static String newUuid() {
return UUID.randomUUID().toString().replaceAll("-", "");
}
/***
* 将object转换为字符串
* @param o
* @return
*/
public static String valueOf(Object o) {
if (o == null){
return null;
}
if(o instanceof String) {
return (String)o;
}
return String.valueOf(o);
}
/**
* 字符串转换，如果是null则返回空字符串
*
* @param o 转换对象
* @return 字符串对象
*/
public static String defaultValueOf(Object o) {
if (o == null) {
return EMPTY;
}
return String.valueOf(o);
}
/**
* 字符串转换，如果是null，则使用默认字符串代替
*
* @param o 转换对象
* @param defaultStr 默认字符串对象
* @return 字符串对象
*/
public static String defaultValueOf(Object o, String defaultStr) {
if (o == null) {
return defaultStr;
}
return String.valueOf(o);
}
/***
* 生成指定位数的数字/验证码
*/
private static final String NUMBER_SET = "12345678901";
private static Random random = new Random();
public static String newRandomNum(int length){
StringBuilder sb = new StringBuilder();
sb.append(NUMBER_SET.charAt(random.nextInt(9)));
for(int i=1; i readLines(final InputStream input, String charset) throws IOException {
final InputStreamReader inputReader = new InputStreamReader(input, Charset.forName(charset));
final BufferedReader reader = new BufferedReader(inputReader);
final List list = new ArrayList<>();
String line;
while ((line = reader.readLine()) != null) {
list.add(line);
}
return list;
}
/**
* 移除转义符
* @param columnName
* @return
*/
public static String removeEsc(String columnName){
if(V.isEmpty(columnName)){
return columnName;
}
if(startsWithAny(columnName, "`", "\"", "[")){
return substring(columnName, 1, columnName.length()-1);
}
return columnName;
}
/**
* 替换指定字符串的指定区间内字符为固定字符
*
* @param str 字符串
* @param startInclude 开始位置（包含）
* @param endExclude 结束位置（不包含）
* @param replacedChar 被替换的字符
* @return 替换后的字符串
* @since v2.3.1
*/
public static String replace(CharSequence str, int startInclude, int endExclude, char replacedChar) {
if (S.isEmpty(str)) {
return valueOf(str);
}
final int strLength = str.length();
if (startInclude > strLength) {
return valueOf(str);
}
if (endExclude > strLength) {
endExclude = strLength;
}
if (startInclude > endExclude) {
// 如果起始位置大于结束位置，不替换
return valueOf(str);
}
final char[] chars = new char[strLength];
for (int i = 0; i < strLength; i++) {
if (i >= startInclude && i < endExclude) {
chars[i] = replacedChar;
} else {
chars[i] = str.charAt(i);
}
}
return new String(chars);
}
/**
* 提取token，去除前缀
* @param authToken
* @return
*/
public static String extractToken(String authToken){
if(S.startsWithIgnoreCase(authToken, Cons.TOKEN_PREFIX_BEARER)){
authToken = S.substring(authToken, Cons.TOKEN_PREFIX_BEARER.length()).trim();
}
return authToken;
}
/**
* 格式化字符串，将{}替换为指定值
* @param template 字符串内容
* @param params 参数值
* @return
*/
public static String format(String template, Object... params){
if(V.isEmpty(params)){
return template;
}
template = S.replaceChars(template, "{}", "%s");
return String.format(template, params);
}
}