Buffer、ArrayBuffer、DataView互转(node.js)

1.Buffer转ArrayBuffer

// 实例一

const buf = Buffer.from("this is a test");

console.log(buf);

console.log(buf.toString());

var arrayBuf = buf.buffer; //

console.log(arrayBuf);

Buffer、ArrayBuffer、DataView互转(node.js)-LMLPHP

2.ArrayBuffer转Buffer

// 实例二

var arrayBuffer = new ArrayBuffer(16);

const buffer = Buffer.from(arrayBuffer);

console.log(buffer.buffer === arrayBuffer);

Buffer、ArrayBuffer、DataView互转(node.js)-LMLPHP

3.ArrayBuffer转DataView

// 实例一

var arrayBuffer1 = new ArrayBuffer(256);

var view = new DataView(arrayBuffer1);

view.setUint32(0,300);

view.setUint32(4,100);

console.log(view.getUint32(0));

console.log(view.getUint32(4));

Buffer、ArrayBuffer、DataView互转(node.js)-LMLPHP

4.DataView转ArrrayBuffer

var arrayBuffer2 = new ArrayBuffer(256);

var view2 = new DataView(arrayBuffer2);

var buf2 = view2.buffer;

console.log(buf2);

Buffer、ArrayBuffer、DataView互转(node.js)-LMLPHP