SpringBoot文件上传下载和多文件上传(图文详解)
2017-09-27 16:43
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6、FileController.java
import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartHttpServletRequest; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.*; import java.util.List; @Controller public class FileController { @RequestMapping("/greeting") public String greeting(@RequestParam(value="name", required=false, defaultValue="World") String name, Model model) { model.addAttribute("name", name); return "greeting"; } private static final Logger logger = LoggerFactory.getLogger(FileController.class); //文件上传相关代码 @RequestMapping(value = "upload") @ResponseBody public String upload(@RequestParam("test") MultipartFile file) { if (file.isEmpty()) { return "文件为空"; } // 获取文件名 String fileName = file.getOriginalFilename(); logger.info("上传的文件名为:" + fileName); // 获取文件的后缀名 String suffixName = fileName.substring(fileName.lastIndexOf(".")); logger.info("上传的后缀名为:" + suffixName); // 文件上传后的路径 String filePath = "E://test//"; // 解决中文问题,liunx下中文路径,图片显示问题 // fileName = UUID.randomUUID() + suffixName; File dest = new File(filePath + fileName); // 检测是否存在目录 if (!dest.getParentFile().exists()) { dest.getParentFile().mkdirs(); } try { file.transferTo(dest); return "上传成功"; } catch (IllegalStateException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return "上传失败"; } //文件下载相关代码 @RequestMapping("/download") public String downloadFile(org.apache.catalina.servlet4preview.http.HttpServletRequest request, HttpServletResponse response){ String fileName = "FileUploadTests.java"; if (fileName != null) { //当前是从该工程的WEB-INF//File//下获取文件(该目录可以在下面一行代码配置)然后下载到C:\\users\\downloads即本机的默认下载的目录 String realPath = request.getServletContext().getRealPath( "//WEB-INF//"); File file = new File(realPath, fileName); if (file.exists()) { response.setContentType("application/force-download");// 设置强制下载不打开 response.addHeader("Content-Disposition", "attachment;fileName=" + fileName);// 设置文件名 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("success"); } catch (Exception e) { e.printStackTrace(); } finally { if (bis != null) { try { bis.close(); } catch (IOException e) { e.printStackTrace(); } } if (fis != null) { try { fis.close(); } catch (IOException e) { e.printStackTrace(); } } } } } return null; } //多文件上传 @RequestMapping(value = "/batch/upload", method = RequestMethod.POST) @ResponseBody public String handleFileUpload(HttpServletRequest request) { List<MultipartFile> files = ((MultipartHttpServletRequest) request) .getFiles("file"); MultipartFile file = null; BufferedOutputStream stream = null; for (int i = 0; i < files.size(); ++i) { file = files.get(i); if (!file.isEmpty()) { try { byte[] bytes = file.getBytes(); stream = new BufferedOutputStream(new FileOutputStream( new File(file.getOriginalFilename()))); stream.write(bytes); stream.close(); } catch (Exception e) { stream = null; return "You failed to upload " + i + " => " + e.getMessage(); } } else { return "You failed to upload " + i + " because the file was empty."; } } return "upload successful"; }1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991001011021031041051061071081091101111121131141151161171181191201211221231241251261271281291301311321331347、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="test"/> <input type="submit" /> </form> <a href="/download">下载test</a> <p>多文件上传</p> <form method="POST" enctype="multipart/form-data" action="/batch/upload"> <p>文件1:<input type="file" name="file" /></p> <p>文件2:<input type="file" name="file" /></p> <p><input type="submit" value="上传" /></p> </form>
</html>
文章转自:http://blog.csdn.net/coding13/article/details/54577076
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