sprintboot+scala文件上传下载
发布时间:2020-12-16 09:41:36 所属栏目:安全 来源:网络整理
导读:常用的springboot+scala实现的webservice上传下载, maven配置文件采用常规配置,见springboot+scala配置 后端代码 FileController.scala package org.tashaxing.controllerimport java.io._import org.springframework.web.bind.annotation._import org.spr
常用的springboot+scala实现的webservice上传下载, maven配置文件采用常规配置,见springboot+scala配置 后端代码 FileController.scala package org.tashaxing.controller import java.io._ import org.springframework.web.bind.annotation._ import org.springframework.core.io.{InputStreamResource,Resource} import org.springframework.http.ResponseEntity import org.springframework.http.HttpHeaders import org.springframework.http.HttpStatus import org.springframework.http.MediaType import org.springframework.web.multipart.MultipartFile @RestController @RequestMapping(Array("/api")) class FileController { @PostMapping(Array("/file/upload/{myparam}")) def uploadFile(@PathVariable(value = "myparam") myparam: String,// extra param submitted @RequestBody file: MultipartFile): Boolean = { if (file.isEmpty) return false val filename = file.getOriginalFilename val suffix = filename.substring(filename.lastIndexOf('.')) // save to directory // here do sth to handle the file record,maybe insert record to database val save_dir = "D:/file" // absolute and relative path are both OK val save_file = new File(save_dir + '/' + filename) // we can customize the filename,make sure the suffix is right file.transferTo(save_file) // save to file system return true } @PostMapping(Array("/file/delete/{filename}")) def deleteReceipt(@PathVariable(value = "filename") filename: String): Boolean = { // first maybe delete record from database // delete from file system val file_dir = "D:/file" // absolute and relative path are both OK val file = new File(file_dir + '/' + filename) if (file.exists()) file.delete() return true } @GetMapping(Array("/file/download/{filename}")) def downloadReceipt(@PathVariable(value = "filename") filename: String): ResponseEntity[Resource] = { // just support download pdf for this demo val headers = new HttpHeaders headers.setContentType(MediaType.parseMediaType("application/pdf")) // maybe other format: application/png val file = new File(FbConfig.file_root + '/' + filename) val resource = new InputStreamResource(new FileInputStream(file)) return ResponseEntity.ok() .headers(headers) .contentLength(file.length()) .contentType(MediaType.parseMediaType("application/pdf")) .body(resource) } } 前端代码 index.html <!DOCTYPE html> <html lang="en"> <head> <title>Getting Started: Serving Web Content</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> </head> <body> <p>Get your greeting <a href="/greeting">here</a></p> <form action="/upload" method="POST" enctype="multipart/form-data"> 文件:<input type="file" name="file"/> <input type="submit" /> </form> <a href="/download">下载</a> </html> 这样就简单实现了一个上传下载功能,需要注意的是
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