package com.example.demo.com.downLoad;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
@Controller
@CrossOrigin
public class DownLoad {
@RequestMapping("/download")
public void download(HttpServletRequest request, HttpServletResponse response){
String fileName = "ECMA6入门.pdf"; //下载的文件名
// 如果文件名不为空，则进行下载
if (fileName != null) {
//设置文件路径
String realPath = "D:\\baidudownload\\";
File file = new File(realPath, fileName);
// 如果文件名存在，则进行下载
if (file.exists()) {
// 配置文件下载
response.setHeader("content-type", "application/octet-stream");
response.setContentType("application/octet-stream");
// 下载文件能正常显示中文
try {
response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
// 实现文件下载
byte[] buffer = new byte[1024];
FileInputStream fis = null;
BufferedInputStream bis = null;
try {
fis = new FileInputStream(file);
bis = new BufferedInputStream(fis);
OutputStream os = response.getOutputStream();
int i = bis.read(buffer);
while (i != -1) {
os.write(buffer, 0, i);
i = bis.read(buffer);
}
System.out.println("Download the song successfully!");
} catch (Exception e) {
System.out.println("Download the song failed!");
} finally {
if (bis != null) {
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<a href="http://localhost:8080/download">download</a>
</body>
</html>
