Java MultipartFile 上传文件/上传图片

1. 判断允许上传文件的 文件后缀/图片后缀/相片后缀 和 其它工具类

2. 上传接口

3. 上传成功

1. 判断允许上传文件的 文件后缀/图片后缀/相片后缀 和 其它工具类

import org.springframework.stereotype.Component;

import java.io.File;

import java.util.Arrays;

import java.util.List;

@Component

public class FileUtil {

public static final ListIMAGE_EXTENSIONS = Arrays.asList(".jpg", ".jpeg", ".png");

}

import java.util.UUID;

public class CommonUtil {

public static String getUUID() {

String uuid = UUID.randomUUID().toString().replaceAll("-", "");

return uuid;

}

}

import java.time.LocalDateTime;

import java.time.format.DateTimeFormatter;

public class DateUtil {

public static final String HH = "HH";

public static final String YYYY_MM_DD = "yyyy-MM-dd";

public static final DateTimeFormatter FORMATTER_HH = DateTimeFormatter.ofPattern(HH);

public static final DateTimeFormatter FORMATTER_YYYY_MM_DD = DateTimeFormatter.ofPattern(YYYY_MM_DD);

public static String getHH() {

return FORMATTER_HH.format(LocalDateTime.now());

}

public static String getYYYYMMDD() {

return FORMATTER_YYYY_MM_DD.format(LocalDateTime.now());

}

}

2. 上传接口

@PostMapping("/updateImage.do")

public MapupdateImage(@RequestParam("image") MultipartFile[] multfiles) {

Mapresult = new HashMap<>();

if (multfiles.length == 0) {

result.put("message", "请选择图片！");

return result;

}

// 源文件名称

final String originalFileName = multfiles[0].getOriginalFilename();

if (StringUtils.isBlank(originalFileName)) {

result.put("message", "请选择图片！");

return result;

}

// 文件后缀[.jpg]

final String suffix = originalFileName.substring(originalFileName.lastIndexOf(".")).toLowerCase();

if (!FileUtil.IMAGE_EXTENSIONS.contains(suffix)) {

result.put("message", "图片格式错误！");

return result;

}

String lastFilePath;

String newFileName = CommonUtil.getUUID() + suffix;

String folderName = File.separator + "temp" + File.separator;

String relativePath = folderName + DateUtil.getYYYYMMDD() + File.separator + DateUtil.getHH();

String filePath = "D:\\file" + relativePath;

String fileUrl = null;

File targetFile = new File(filePath);

if (!targetFile.exists()) {

targetFile.mkdirs();

}

FileOutputStream out = null;

try {

lastFilePath = filePath + File.separator + newFileName;

out = new FileOutputStream(lastFilePath);

out.write(multfiles[0].getBytes());

fileUrl = "http://127.0.0.1:9000" + relativePath + File.separator + newFileName;

} catch (Exception e) {

e.printStackTrace();

} finally {

if (out != null) {

try {

out.flush();

} catch (IOException e) {

e.printStackTrace();

}

try {

out.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

if (fileUrl == null) {

result.put("message", "图片上传失败！");

return result;

}

result.put("message", "上传成功！");

result.put("url", fileUrl);

return result;

}

3. 上传成功

url => http://127.0.0.1:9000/temp/2019-09-12/14/0eac00b96f134652b34172e84febe8d1.jpg

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