Uint8Array 如何直接转为String or Json

try { 
this.json = String.fromCharCode(...data) 
console.info("fromCharCode = " + this.json); 
 
let textDecoderOptions: util.TextDecoderOptions = { 
// fatal: false, 
ignoreBOM : true 
} 
let decodeWithStreamOptions: util.DecodeWithStreamOptions = { 
stream: false 
} 
let textDecoder = util.TextDecoder.create('utf-8', textDecoderOptions); 
let retStr = textDecoder.decodeWithStream(data , decodeWithStreamOptions); 
console.info("retStr = " + retStr); 
 
let bufferStr = buffer.from(data.buffer); 
console.info("bufferStr = " + bufferStr); 
}catch (e){ 
console.info('Cktest ' + JSON.stringify(e)) 
}