前端保存时切割base64字符 并转换为url地址

前端切割base64字符 

function ObtainImageUploadLocation(commentSuggestionForReview) {
//切割字符串  获取字符
    var split = commentSuggestionForReview.split("\"");

    var img = "";
    //循环字符串  通过indexof判断是否有img和src 以及下一个下一个img当中是否有base64当中有的data:image的标签 
    for (var i = 0; i < split.length; i++) {
        if (split[i].indexOf("<img") != -1 && split[i].indexOf("src=") != -1 && split[i + 1].indexOf("data:image") != -1) {

            var param = {
                commentSuggestionForReview: split[i + 1]
            }
    //调用接口   通过后端转换为指定的url地址  
            uuwatchAjax(param, url, false,function (review) {
                    if (review.success == true) {
                        img = img + split[i] + review.url
                    }
                });
            i = i + 1
        } else {
            img += split[i];
        }
    }
    return img;
}

//后端转换base64代码  
try {
                BASE64Decoder decoder = new BASE64Decoder();  //转换
                byte[] decoderBytes = decoder.decodeBuffer('前端传递值');
                //图片位置
                String targetPath = 'G:\aa.png'
                FileOutputStream out = new FileOutputStream(targetPath);
                out.write(decoderBytes);
 } catch (Exception e) {
               e.printStackTrace();
 }