harmony-utils之StrUtil，字符串工具類

harmony-utils 簡介與說明

[harmony-utils] 一款功能豐富且極易上手的HarmonyOS工具庫，借助眾多實用工具類，致力于助力開發者迅速構建鴻蒙應用。其封裝的工具涵蓋了APP、設備、屏幕、授權、通知、線程間通信、彈框、吐司、生物認證、用戶首選項、拍照、相冊、掃碼、文件、日志、異常捕獲、字符、字符串、數字、集合、日期、隨機、base64、加密、解密、JSON等一系列的功能和作，能夠滿足各種不同的開發需求。
[picker_utils] 是harmony-utils拆分出來的一個子庫，包含 PickerUtil、PhotoHelper、ScanUtil。

下載安裝
ohpm i @pura/harmony-utils
ohpm i @pura/picker_utils

//全局初始化方法，在UIAbility的onCreate方法中初始化 AppUtil.init()
 onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
   AppUtil.init(this.context);
 }

API方法與使用

isNull 判斷字符串是否為空（undefined、null）

let str0 = '哈哈哈哈';
let str1 = '';
let str2 = null;
let str3 = undefined;
let bl0 = StrUtil.isNull(str0);
let bl1 = StrUtil.isNull(str1);
let bl2 = StrUtil.isNull(str2);
let bl3 = StrUtil.isNull(str3);

isNotNull 判斷字符串是否為非空（undefined、null）

let str0 = '哈哈哈哈';
let str1 = '';
let str2 = null;
let str3 = undefined;
let bn0 = StrUtil.isNotNull(str0);
let bn1 = StrUtil.isNotNull(str1);
let bn2 = StrUtil.isNotNull(str2);
let bn3 = StrUtil.isNotNull(str3);

isEmpty 判斷字符串是否為空（undefined、null、字符串長度為0）

let str0 = '哈哈哈哈';
let str1 = '';
let str2 = null;
let str3 = undefined;
let bl0 = StrUtil.isEmpty(str0);
let bl1 = StrUtil.isEmpty(str1);
let bl2 = StrUtil.isEmpty(str2);
let bl3 = StrUtil.isEmpty(str3);

isNotEmpty 判斷字符串是否為非空(undefined、null、字符串長度為0)

let str0 = '哈哈哈哈';
let str1 = '';
let str2 = null;
let str3 = undefined;
let bn0 = StrUtil.isNotEmpty(str0);
let bn1 = StrUtil.isNotEmpty(str1);
let bn2 = StrUtil.isNotEmpty(str2);
let bn3 = StrUtil.isNotEmpty(str3);

isBlank 判斷字符串是否為空和空白符(空白符包括空格、制表符、全角空格和不間斷空格)

let str0 = 'tn  ';
let str1 = '      ';
let str2 = " t t ";
let str3 = " 哈 哈 ";
let bl0 = StrUtil.isBlank(str0);
let bl1 = StrUtil.isBlank(str1);
let bl2 = StrUtil.isBlank(str2);
let bl3 = StrUtil.isBlank(str3);

isNotBlank 判斷字符串是否為非空

let str0 = 'tn  ';
let str1 = '      ';
let str2 = " t t ";
let str3 = " 哈 哈 ";
let bn0 = StrUtil.isNotBlank(str0);
let bn1 = StrUtil.isNotBlank(str1);
let bn2 = StrUtil.isNotBlank(str2);
let bn3 = StrUtil.isNotBlank(str3);

trim 去除字符串兩端的空格

let str1 = "  H e llo   World t ";
let str2 = "   呵呵n嘿t嘿   哈哈 ";
let trimStr1 = StrUtil.trim(str1);
let trimStr2 = StrUtil.trim(str2);

trimAll 去除字符串里的所有空格

let str1 = "  H e llo   World t ";
let str2 = "   呵呵n嘿t嘿   哈哈 ";
let trimStr1 = StrUtil.trimAll(str1);
let trimStr2 = StrUtil.trimAll(str2);

replace 替換字符串中匹配的正則為給定的字符串

let str1 = "阿超是一個好人,小阿超也是一個好人";
let str = StrUtil.replace(str1, "阿超", "張三");

replaceAll 替換字符串中所有匹配的正則為給定的字符串

let str1 = "阿超是一個好人,小阿超也是一個好人";
let strAll = StrUtil.replaceAll(str1, "好人", " HAO-REN ");

startsWith 判斷字符串是否以給定的字符串開頭

let str1 = "大聰明是一個好人,DSB也是一個好人";
let startsWith = StrUtil.startsWith(str1, "大聰明");

endsWith 判斷字符串是否以給定的字符串結尾

let str1 = "大聰明是一個好人,DSB也是一個好人";
let endsWith = StrUtil.endsWith(str1, "好人");

repeat 將字符串重復指定次數

let str2 = "千秋萬代";
let strs = StrUtil.repeat(str2, 6);

toLower 將整個字符串轉換為小寫

let str = "anima,For generations to come, Forever Immortal,IT is SB";
let str1 = StrUtil.toLower(str);

toUpper 將整個字符串轉換為大寫

let str = "anima,For generations to come, Forever Immortal,IT is SB";
let str2 = StrUtil.toUpper(str);

capitalize 將字符串首字母轉換為大寫，剩下為小寫

let str = "anima,For generations to come, Forever Immortal,IT is SB";
let str3 = StrUtil.capitalize(str);

equal 判斷兩個傳入的數值或者是字符串是否相等

let bl1 = StrUtil.equal("ASX1", "ASX1");
let bl2 = StrUtil.equal("ASX1", "AS1");
let bl4 = StrUtil.equal(26, 26);
let bl5 = StrUtil.equal(26, 29);

notEqual 判斷兩個傳入的數值或者是字符串是否不相等

let bl3 = StrUtil.notEqual("AS1", "ASX1");
let bl6 = StrUtil.notEqual(22, 32);

strToUint8Array 字符串轉Uint8Array

let str1 = "我是笑哈哈";
let unit8Array = StrUtil.strToUint8Array(str1);

unit8ArrayToStr Uint8Array轉字符串

let str1 = "我是笑哈哈";
let unit8Array = StrUtil.strToUint8Array(str1);
let str = StrUtil.unit8ArrayToStr(unit8Array);

strToBase64 字符串轉Base64字符串

let str1 = "我是笑面虎";
let base64Str = StrUtil.strToBase64(str1);

base64ToStr Base64字符串轉字符串

let str1 = "我是笑面虎";
let base64Str = StrUtil.strToBase64(str1);
let str = StrUtil.base64ToStr(base64Str);

strToBuffer 字符串轉ArrayBuffer

let str1 = "我是樂哈哈";
let buff = StrUtil.strToBuffer(str1);

bufferToStr ArrayBuffer轉字符串

let str1 = "我是樂哈哈";
let buff = StrUtil.strToBuffer(str1);
let str = StrUtil.bufferToStr(buff);

bufferToUint8Array ArrayBuffer轉Uint8Array

let str1 = "我是甜啦啦";
let buff1 = StrUtil.strToBuffer(str1);
let unit8Array = StrUtil.bufferToUint8Array(buff1);

unit8ArrayToBuffer Uint8Array轉ArrayBuffer

let str1 = "我是甜啦啦";
let buff1 = StrUtil.strToBuffer(str1);
let unit8Array = StrUtil.bufferToUint8Array(buff1);
let buff = StrUtil.unit8ArrayToBuffer(unit8Array);

getErrorStr 獲取Error的JSON字符串

let error = new Error("未知異常！");
let errorStr = StrUtil.getErrorStr(error as BusinessError);

getErrnoToString 獲取系統錯誤碼對應的詳細信息

let errStr1 = StrUtil.getErrnoToString(202);
let errStr2 = StrUtil.getErrnoToString(1600004);

創作不易，請給童長老點贊

審核編輯 黃宇