springMVC05--实现文件上传

主要通过common-fileupload来实现
导入相关jar包common-fileupload、common-io
配置SpringMVC的文件解析器：

接着编写Controller：

@Controller
public class FileUploadController {
    @RequestMapping("/file")
    public String upload(@RequestParam("file") MultipartFile file, HttpServletRequest request) throws IOException {
        InputStream is = file.getInputStream();
        String path = request.getContextPath() + "/upload";
        File dir = new File(path);
        if (!dir.exists()) {
            dir.mkdirs();
        }
        File toSave = new File(path, file.getOriginalFilename());
        OutputStream os = new FileOutputStream(toSave);
        byte[] buffer = new byte[1024];
        int len = 0;
        while ((len = is.read(buffer)) != -1) {
            os.write(buffer, 0, len);
        }
        os.flush();
        os.close();
        is.close();
        System.out.println(toSave.getAbsolutePath());
        return "success";
    }
}

最后编写ui：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>







    
Please upload a file
    <%
        String path = request.getContextPath();
    %>
    

         
        
    

总结：

终于学会好好地啾啾文档了。
有啥问题多看看文档哈哈哈哈