关于vue二进制转图片显示问题 后端返回的是byte[]数组

 lookPreview(this.previewID).then(response => {
        this.previewUrl = "data:image/jpeg;base64," + response.data;
        this.previewList.push(this.previewUrl);
        this.imageOpen = true;
      });

 <img :src="'data:image/jpeg;base64,'+row.imageBlob" style="width:50%;height:50%" @click="handleLookAt(row)">

var arry  = [-1, -40, -1, -32, 0, 16, 74, 70, 73, 70, 0, 1, 2, 0, 0, 1, 0, 1, 0, 0, -1, -37, 0, 67, 0, 8, 6, 6, 7, 6, 5, 8, 7, 7, 7, 9, 9, 8, 10, 12, 20, 13, 12, 11, 11, 12, 25, 18, 19, 15, 20, 29, 26, 31, 30, 29, 26, 28, 28, 32, 36, 46, 39, 32, 34, 44, 35, 28, 28, 40, 55, 41, 44, 48, 49, 52, 52, 52, 31, 39, 57, 61, 56, 50, 60, 46, 51, 52, 50, -1, -37, 0, 67, 1, 9, 9, 9, 12, 11, 12, 24, 13, 13, 24, 50, 33, 28, 33, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, -1, -64, 0, 17, 8, 0, 26, 0, 80, 3, 1, 34, 0, 2, 17, 1, 3, 17, 1, -1, -60, 0, 31, 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, -1, -60, 0, -75, 16, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 125, 1, 2, 3, 0, 4, 17, 5, 18, 33, 49, 65, 6, 19, 81, 97, 7, 34, 113, 20, 50, -127, -111, -95, 8, 35, 66, -79, -63, 21, 82, -47, -16, 36, 51, 98, 114, -126, 9, 10, 22, 23, 24, 25, 26, 37, 38, 39, 40, 41, 42, 52, 53, 54, 55, 56, 57, 58, 67, 68, 69, 70, 71, 72, 73, 74, 83, 84, 85, 86, 87, 88, 89, 90, 99, 100, 101, 102, 103, 104, 105, 106, 115, 116, 117, 118, 119, 120, 121, 122, -125, -124, -123, -122, -121, -120, -119, -118, -110, -109, -108, -107, -106, -105, -104, -103, -102, -94, -93, -92, -91, -90, -89, -88, -87, -86, -78, -77, -76, -75, -74, -73, -72, -71, -70, -62, -61, -60, -59, -58, -57, -56, -55, -54, -46, -45, -44, -43, -42, -41, -40, -39, -38, -31, -30, -29, -28, -27, -26, -25, -24, -23, -22, -15, -14, -13, -12, -11, -10, -9, -8, -7, -6, -1, -60, 0, 31, 1, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, -1, -60, 0, -75, 17, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 119, 0, 1, 2, 3, 17, 4, 5, 33, 49, 6, 18, 65, 81, 7, 97, 113, 19, 34, 50, -127, 8, 20, 66, -111, -95, -79, -63, 9, 35, 51, 82, -16, 21, 98, 114, -47, 10, 22, 36, 52, -31, 37, -15, 23, 24, 25, 26, 38, 39, 40, 41, 42, 53, 54, 55, 56, 57, 58, 67, 68, 69, 70, 71, 72, 73, 74, 83, 84, 85, 86, 87, 88, 89, 90, 99, 100, 101, 102, 103, 104, 105, 106, 115, 116, 117, 118, 119, 120, 121, 122, -126, -125, -124, -123, -122, -121, -120, -119, -118, -110, -109, -108, -107, -106, -105, -104, -103, -102, -94, -93, -92, -91, -90, -89, -88, -87, -86, -78, -77, -76, -75, -74, -73, -72, -71, -70, -62, -61, -60, -59, -58, -57, -56, -55, -54, -46, -45, -44, -43, -42, -41, -40, -39, -38, -30, -29, -28, -27, -26, -25, -24, -23, -22, -14, -13, -12, -11, -10, -9, -8, -7, -6, -1, -38, 0, 12, 3, 1, 0, 2, 17, 3, 17, 0, 63, 0, -9, -6, 40, -94, -128, 25, 28, -79, -52, -91, -94, -111, 93, 67, 50, -110, -89, 35, 32, -112, 71, -44, 16, 65, -9, 20, -6, -55, -16, -25, -4, -125, 38, -1, 0, -81, -5, -49, -3, 41, -106, -99, -81, -53, 36, 90, 88, -14, -92, 104, -52, -73, 54, -16, -77, 33, -38, -37, 30, 100, 70, 0, -114, 65, 42, -60, 100, 114, 58, -126, 13, 79, 55, -69, -52, 110, -24, -2, -1, 0, -40, -89, -42, -33, -115, -117, 48, 106, -70, 117, -43, -28, -74, 118, -9, -10, -77, 93, 69, -97, 50, 24, -26, 86, 116, -63, -63, -54, -125, -111, -125, -59, 88, -110, 88, -31, 80, -46, -56, -88, -91, -107, 65, 99, -127, -110, 64, 3, -22, 73, 0, 123, -102, -55, -15, 12, 81, -38, 120, 90, -14, 91, 104, -42, 23, -80, -74, 121, -83, 12, 99, 111, -110, -24, -121, 105, 80, 58, 14, -40, -24, 65, 32, -126, 9, 20, -1, 0, 17, -1, 0, -56, 50, 31, -6, -1, 0, -77, -1, 0, -46, -104, -87, 57, 52, -99, -6, 23, 26, 48, -100, -95, -53, -76, -99, -65, 47, -13, 52, -28, -106, 56, 84, 52, -78, 42, 41, 101, 80, 88, -32, 100, -112, 0, -6, -110, 64, 30, -26, -97, 89, 62, 35, -1, 0, -112, 100, 63, -11, -1, 0, 103, -1, 0, -91, 49, 86, -75, 85, -11, -79, -117, -123, -87, -87, -9, 109, 125, -42, -1, 0, 48, -94, -118, 41, -103, -123, 20, 81, 64, 24, -47, -24, 51, 64, 101, 22, -38, -26, -93, 4, 82, 77, 36, -34, 82, 45, -71, 85, 46, -27, -37, 5, -94, 39, 25, 99, -44, -102, -42, -106, 40, -25, -123, -31, -102, 53, -110, 41, 20, -85, -93, -116, -85, 3, -63, 4, 30, -94, -97, 69, 74, -118, 91, 26, 78, -84, -26, -17, 45, -3, 18, -4, -116, -72, -76, 80, -77, 33, -97, 80, -68, -69, -126, 38, 13, 21, -67, -61, 35, 34, 17, -9, 73, 33, 67, 57, 94, -37, -39, -71, -61, 28, -80, 4, 94, -70, -75, -122, -14, -35, -32, -99, 55, 70, -40, -56, -55, 4, 16, 114, 8, 35, -112, 65, 0, -126, 57, 4, 2, 57, -87, -88, -90, -94, -106, -127, 42, -77, -109, 82, 111, 85, -14, 50, -30, -47, -33, -50, 71, -68, -44, -17, 47, -110, 54, 14, -111, 92, 8, -126, 7, 28, -122, 33, 17, 114, 71, 81, -100, -128, 112, 113, -112, 8, -44, -94, -118, 18, 72, 83, -87, 41, -17, -2, 95, -112, 81, 69, 20, -56, 63, -1, -39];
    var str12 = arrayBufferToBase64(arry);//转换字符串
    console.log(str12);
    var outputImg = document.createElement('img');
    outputImg.src = 'data:image/png;base64,'+str12;
    // // append it to your page
    document.body.appendChild(outputImg);
    console.log(outputImg);
    function arrayBufferToBase64( buffer ) {
        var binary = '';
        var bytes = new Uint8Array( buffer );
        var len = bytes.byteLength;
        for (var i = 0; i < len; i++) {
            binary += String.fromCharCode( bytes[ i ] );
        }
        return window.btoa( binary );
    }

$get("_api/file/download/singleFileInfo/"+this.fildId).then((res) =>{//发布文章列表
        console.log("=====",res)
});

<img class="detailImg" :src="'_api/file/download/singleFileInfo/' +fildId">