理解String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+pa
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String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
今天才知道 request.getScheme()这是获取协议:如常用的http协议
request.getServerName()服务器的名字
request.getServerPort()这是服务器端口号
path就是网站项目发布的的文件夹
/对应文件夹下具体的文件
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