在Spring中从Controller返回文件 [英] Return a file from Controller in Spring

问题描述

我是春天的新手.我有一个带有几个GET参数的RequestMapping的控制器.他们返回一个String. 但是一种方法需要返回"/res/"文件夹中的文件.我该怎么办?

I am new to spring. I have a controller with a RequestMapping for several GET parameters. They return a String . But one method needs to return a file in the "/res/" folder. How do I do that?

@RequestMapping(method = RequestMethod.GET,value = "/getfile")
public @ResponseBody 
String getReviewedFile(@RequestParam("fileName") String fileName)
{
    return //the File Content or better the file itself
}

谢谢

推荐答案

感谢@ JAR.JAR.beans.这是链接:从spring控制器下载文件

Thanks to @JAR.JAR.beans. Here is the link: Downloading a file from spring controllers

@RequestMapping(value = "/files/{file_name}", method = RequestMethod.GET)
@ResponseBody 
public FileSystemResource getFile(@PathVariable("file_name") String fileName) {
    return new FileSystemResource(myService.getFileFor(fileName)); 
}

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