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在网上找了半天，获取springboot resource下面的文件，各种实验，最终解决了，废话不说直接上代码
/**
* 描述：下载外部案件导入模板
* @throws exception
*/
@requestmapping(value = "/downloadexcel")
@responsebody
public void downloadexcel(httpservletresponse res, httpservletrequest req,string name) throws exception {
string filename = name+".xlsx";
servletoutputstream out;
res.setcontenttype("multipart/form-data");
res.setcharacterencoding("utf-8");
res.setcontenttype("text/html");
string filepath = getclass().getresource("/template/" + filename).getpath();
string useragent = req.getheader("user-agent");
if (useragent.contains("msie") || useragent.contains("trident")) {
filename = java.net.urlencoder.encode(filename, "utf-8");
} else {
// 非ie浏览器的处理：
filename = new string((filename).getbytes("utf-8"), "iso-8859-1");
}
filepath = urldecoder.decode(filepath, "utf-8");
res.setheader("content-disposition", "attachment;filename=" + filename);
fileinputstream inputstream = new fileinputstream(filepath);
out = res.getoutputstream();
int b = 0;
byte[] buffer = new byte[1024];
while ((b = inputstream.read(buffer)) != -1) {
// 4.写到输出流(out)中
out.write(buffer, 0, b);
}
inputstream.close();
if (out != null) {
out.flush();
out.close();
}
}
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