springMVC文件上传
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2022-06-03 10:30:14
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MultipartFile 支持所有类型文件上传
pom依赖:
<properties>
<commons-fileupload.version>1.3.1</commons-fileupload.version>
<lombok.version>1.18.2</lombok.version>
</properties>
<!-- 文件上传组件 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>${commons-fileupload.version}</version>
</dependency>
<!--lombok 依赖-->
<!--自动 生成 set,get-->
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
springmvc配置文件上传:
<!--<!– 定义文件上传解析器 –>-->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 设定默认编码 -->
<property name="defaultEncoding" value="UTF-8"></property>
<!-- 设定文件上传的最大值5MB,5*1024*1024 -->
<property name="maxUploadSize" value="5242880"></property>
</bean>
后台:
controller:
@Controller
@RequestMapping("/util")
public class UtilController {
@Autowired
FileService fileService;
/**
*
* @param prefix 文件保存的分类文件夹,比如picture
* @param file
* @return
* @throws Exception
*/
@RequestMapping("/upload/{prefix}")
@ResponseBody
public Result<FileUploadResult> uploaFile(@PathVariable String prefix,@RequestParam("file") MultipartFile file) throws Exception {
return fileService.pictureUpload(file,prefix);
}
}
FileService代码:
接口层
public interface FileService {
Result<FileUploadResult> pictureUpload(MultipartFile src, String prefix) throws Exception;
}
实现层:
@Service
public class FileServiceImpl implements FileService {
@Autowired
private HttpServletRequest request;
// public static final String PICTURE_SAVE_PREFIX="picture";
@Override
public Result<FileUploadResult> pictureUpload(MultipartFile src, String prefix) throws Exception {
String ipPort = "http://" + request.getRemoteHost() + ":" + request.getServerPort();
//真实保存路径
String realServerBasePath = request.getSession().getServletContext().getRealPath("");
String resultPath = PictureUploadUtil.pictureUpload(ipPort, prefix, realServerBasePath, src);
if (StringUtils.isEmpty(resultPath)) {
return Result.error(-1, "文件上传失败");
}
FileUploadResult result = new FileUploadResult();
result.setDownloadUrl(resultPath);
return Result.success(result);
}
}
PictureUploadUtil:
/**
* 图片上传工具类,
*/
public class PictureUploadUtil {
/**
* @param prefix 各类型文件 在项目中的根文件夹名,方便分类存放 比如 /pic,如果prefix为 pic
* 则fileSaveDir:E:\学习文档\测试文件\pic\2018\09\19
* @param savePath 保存文件的根目录,一般需要使用Context.getRealPath("") 来获取
* @param src 源文件
* @return
*/
public static String pictureUpload(String ipPort, String prefix, String savePath, MultipartFile src) throws Exception {
if (src.isEmpty()) {
throw new Exception("MultipartFile is empty");
}
String dateDir = getDirsNameByDate(prefix);
String fileSaveDir = savePath + dateDir;
String newName = buildFileName(src.getOriginalFilename());
System.out.println("fileSaveDir:" + fileSaveDir);
//真实路径是:savePath+dateDir+newName
//下载只需要:ip:port/dateDir/newName
String downloadUrl = ipPort + "/" + dateDir + "/" + newName;
File dirs = new File(fileSaveDir);
if (!dirs.exists()) {
dirs.mkdirs();
}
String realSavePath = fileSaveDir + File.separator + newName;
System.out.println("realSavePath:" + realSavePath);
Path path = Paths.get(realSavePath);
try {
Files.write(path, src.getBytes());
} catch (IOException e) {
downloadUrl = null;
e.printStackTrace();
}
return downloadUrl;
}
/**
* @param prefix 根文件夹名字(分类存放,比如 /pic)
* @return
*/
private static String getDirsNameByDate(String prefix) {
Date now = new Date();
String dateString = new SimpleDateFormat("yyyy/MM/dd").format(now).toString();
String result = dateString;
if (!StringUtils.isEmpty(prefix)) {
result = prefix + File.separator + dateString;
}
System.out.println("getDirsNameByDate:" + result);
return result;
}
/**
* @return 获取文件名后缀
* @created 15:26 2018/9/19
* @author wangwei
* @params
*/
private static String getFileSuffix(String fileName) {
System.out.println("fileName:" + fileName);
if (StringUtils.isEmpty(fileName)) {
return null;
}
return fileName.substring(fileName.lastIndexOf('.'));
}
private static void fileCopy(File source, File dest) throws IOException {
FileChannel inputChannel = null;
FileChannel outputChannel = null;
try {
inputChannel = new FileInputStream(source).getChannel();
outputChannel = new FileOutputStream(dest).getChannel();
outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
} finally {
inputChannel.close();
outputChannel.close();
}
}
/**
* @param originName
* @return 生成文件名
*/
private static String buildFileName(String originName) {
return System.currentTimeMillis() + getFileSuffix(originName);
}
}
返回结果封装类:
/**
*@author wangwei
*@created 14:31 2018/9/19
*@classname FileUploadResult
*@classdescription 文件上传返回结果
*
*/
@Data
public class FileUploadResult {
private String fileName;
private String savePath;
//可以下载的url
private String downloadUrl;
private String url;
}
测试:
测试效果:
以图片上传为例
(使用postman测试)
控制台输出:
(注意红色的pic,这是我在上传路径中指定的图片文件保存根目录名)
getDirsNameByDate:pic\2018/09/19
fileName:2_abumdshahnoorshawon-lilacbreastedroller.jpg
fileSaveDir:E:\学习文档\项目\ideasvnchekcout\code\buybuybuy\build-ssm\classes\artifacts\build_ssm_Web_exploded\pic\2018/09/19
realSavePath:E:\学习文档\项目\ideasvnchekcout\code\buybuybuy\build-ssm\classes\artifacts\build_ssm_Web_exploded\pic\2018/09/19\1537360876620.jpg
返回结果:
{
"data": {
"fileName": null,
"savePath": null,
"downloadUrl": "http://127.0.0.1:8080/pic\\2018/09/19/1537360876620.jpg",
"url": null
},
"msg": "操作成功",
"code": -1,
"success": true
}
测试浏览器访问:
测试一个压缩包上传:
控制台输出:
(注意红色的zip,这是我在上传路径中指定的.zip文件保存根目录名)
fileName:applicationContext-shiro.zip
fileSaveDir:E:\学习文档\项目\ideasvnchekcout\code\buybuybuy\build-ssm\classes\artifacts\build_ssm_Web_exploded\zip\2018/09/19
realSavePath:E:\学习文档\项目\ideasvnchekcout\code\buybuybuy\build-ssm\classes\artifacts\build_ssm_Web_exploded\zip\2018/09/19\1537360989065.zip
返回结果:
{
"data": {
"fileName": null,
"savePath": null,
"downloadUrl": "http://127.0.0.1:8080/zip\\2018/09/19/1537360989065.zip",
"url": null
},
"msg": "操作成功",
"code": -1,
"success": true
}
测试访问:
真实文件保存情况:
最终看看真实的目录文件是啥样的: