java byte数组转String的几种常用方法

byte[] bytes = {72, 101, 108, 108, 111}; // "Hello" in ASCII
String str = new String(bytes);
System.out.println(str); // 输出: Hello

byte[] bytes = new byte[]{72, 101, 108, 108, 111, 114, 108, 100}; // "HelloWorld" in ASCII
String str = new String(bytes, 0, 5); // 只转换前5个字符
System.out.println(str); // 输出: Hello

byte[] bytes = {72, 101, 108, 108, 111}; // "Hello" in ASCII
String str = new String(bytes, StandardCharsets.UTF_8);
System.out.println(str); // 输出: Hello

byte[] bytes = new byte[]{72, 101, 108, 108, 111, 114, 108, 100}; // "HelloWorld" in ASCII
String str = new String(bytes, 6, 5, "US-ASCII"); // 从第6个字符开始转换5个字符
System.out.println(str); // 输出: World

byte[] bytes = {72, 101, 108, 108, 111}; // "Hello" in ASCII
String str = new String(bytes, "UTF-8");
System.out.println(str); // 输出: Hello

package com.bill.example;
 
public class StringByteArrayExamples 
{
    public static void main(String[] args) 
    {
        //Original String
        String string = "hello world";
         
        //Convert to byte[]
        byte[] bytes = string.getBytes();
         
        //Convert back to String
        String s = new String(bytes);
         
        //Check converted string against original String
        System.out.println("Decoded String : " + s);
    }
}

hello world