上传图片

前端代码：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE HTML>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>单图片上传</title>
</head>
<body>
<div style="color: red">
    <c:forEach items="${errs}" var="err">
        <div>${err}</div>
    </c:forEach>
</div>

<fieldset>
    <legend>图片上传</legend>
    <h2>只能上传单张10M以下的 PNG、JPG、GIF 格式的图片</h2>
    <form action="/shop/shop1" method="post" enctype="multipart/form-data">
        选择文件:<input type="file" name="ufile">
        <input type="submit" value="上传">
    </form>
</fieldset>
</body>
</html>

后台代码：

@Controller
@RequestMapping("/shop")
public class ImgController {

    @RequestMapping(method = RequestMethod.GET)
    public String img() {
        return "img";
    }

    @PostMapping("/shop1")
    public String img(@RequestPart("ufile") MultipartFile file, Model model, HttpServletRequest req) {
        if (file.isEmpty()) {
            model.addAttribute("err", "不能为空");
            return "img";
        }
        //图片验证
        if (!file.getContentType().contains("image/")) {
            model.addAttribute("err", "只允许图片上传");
            return "img";
        }
        //图片大小只能为5M
        if (file.getSize() > 1024 * 1024 * 5) {
            model.addAttribute("err", "文件超出大小");
            return "img";
        }

        //路径
        String path = req.getServletContext().getRealPath("");
        path = path + "images\\";
        File file1 = new File(path);
        if (!file1.exists()) {
            //如果不存在就创建
            file1.mkdirs();
        }

        String filename = file.getOriginalFilename().substring(0, file.getOriginalFilename().lastIndexOf("."));
        filename = "upload_" + filename + "_" + new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        filename = filename + file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."), file.getOriginalFilename().length());

        try {
            file.transferTo(new File(path + "\\" + filename));
        } catch (IOException e) {
            model.addAttribute("err", "文件上传失败，请重新上传");
        }

        return "img";
    }

 

posted @ 2018-12-06 10:43  随★风  阅读(315)  评论(0)  编辑  收藏  举报