# SpringBoot+thymeleaf 实现文件下载
**Repository Path**: xiaorenhua/springBoot_thymeleaf_download_file
## Basic Information
- **Project Name**: SpringBoot+thymeleaf 实现文件下载
- **Description**: SpringBoot+thymeleaf 实现文件下载
- **Primary Language**: Java
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 0
- **Forks**: 2
- **Created**: 2022-07-06
- **Last Updated**: 2022-07-06
## Categories & Tags
**Categories**: Uncategorized
**Tags**: None
## README
# SpringBoot文件下载
## 1.项目结构
## 2.FileController.java
```java
package xin.baizhiedu.controller;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.net.URLEncoder;
@Controller
@RequestMapping("/file")
public class FileController {
private static final Logger log = LoggerFactory.getLogger(FileController.class);
@Value("${file.download.dir}")
private String realPath;
/**
* 文件下载
* @param fileName
*/
@RequestMapping("/download")
public void downloadFile(String fileName, HttpServletResponse response) throws Exception {
log.debug("当前下载的文件名是：{}", fileName);
log.debug("当前下载的文件的目录是：{}", realPath);
// 1.去指定目录读取文件
File file = new File(realPath, fileName);
// 2.将文件读取为文件输入流
FileInputStream is = new FileInputStream(file);
// 2.1 获取响应流之前 一定要设置以附件形式下载
response.setHeader("content-disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
// 3.获取响应输出流
ServletOutputStream os = response.getOutputStream();
// 4.输入流复制给输出流
/*int len = 0;
byte[] buff = new byte[1024];
while (true) {
len = is.read(buff);
if (len==-1) break;
os.write(buff, 0, len);
}*/
// 5.释放资源
/*os.close();
is.close();*/
FileCopyUtils.copy(is,os);
}
}
```
## 3.index.html
```html
index
Hello index !
测试文件下载
HELP.md
readme.txt
项目介绍.md