Go数组转换，[]byte、[]unint16互相转换的方法封装，完整范例

需求：分别封装方法将[]byte转换成[]unint16，将[]unint16转换成 []byte

byte相当于unint8

分析：长度为20的[]byte转换为长度为10的[]unint16,

他们之间的转换如

bytes := []byte{0, 1}   ===》[0*256+1]=1  注意：第奇数乘256加偶数的值

则

[]uint16的值为[1]

完整代码如下：

package main

import (
    "fmt"
)

func BytesToUint16s(bytes []byte) []uint16 {
    numUint16s := len(bytes) / 2
    uint16s := make([]uint16, numUint16s)

    for i := 0; i < numUint16s; i++ {
        uint16s[i] = uint16(bytes[i*2])<<8 | uint16(bytes[i*2+1])
    }
    return uint16s
}

func Uint16sToBytes(uint16s []uint16) []byte {
    numBytes := len(uint16s) * 2
    bytes := make([]byte, numBytes)

    for i := 0; i < len(uint16s); i++ {
        bytes[i*2] = byte(uint16s[i] >> 8)
        bytes[i*2+1] = byte(uint16s[i])
    }
    return bytes
}

func main() {
    bytes := []byte{0, 1, 1, 0, 19, 18, 255, 0, 0, 1, 1, 0, 19, 18, 255, 0, 19, 18, 255, 255}
    uint16s := []uint16{1, 256, 4882, 65280, 1, 256, 4882, 65280, 4882, 65535}

    getUint16s := BytesToUint16s(bytes)
    getBytes := Uint16sToBytes(uint16s)

    fmt.Println(getUint16s)
    fmt.Println(getBytes)
}