啥都不说 直接上代码
1.html:
<form action="/bcis/api/headImgUpload.json" method="post" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" value="提交">
</form>
2.contraller:
@RequestMapping(value = "/headImgUpload.json", method = RequestMethod.POST)
@ResponseBody
public Map<String, Object> headImgUpload(HttpServletRequest request,MultipartFile file) {
Map<String, Object> value = new HashMap<String, Object>();
value.put("success", true);
value.put("errorCode", 0);
value.put("errorMsg", "");
try {
String head = userService.updateHead(file, 4);//此处是调用上传服务接口
value.put("data", head);
} catch (IOException e) {
e.printStackTrace();
value.put("success", false);
value.put("errorCode", 200);
value.put("errorMsg", "图片上传失败");
}
return value;
}
3.service 此处要把
@Autowired
private OSSClientUtil ossClient;注进来
@Override
public String updateHead(MultipartFile file, long userId) throws IOException{
String url = ImgUploadUtil.uploadImg(file, "head");
File fileOnServer = new File(url);
FileInputStream fin;
try {
fin = new FileInputStream(fileOnServer);
String[] split = url.split("/");
String s = ossClient.uploadFile2OSS(fin, split[split.length - 1]);
System.out.println(s);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
userDao.updateHead(userId, url);//此处更新用户头像
return SystemConstant.IMG_URL_PREFIX + url;
}
4. ImgUploadUtil帮助类
public class ImgUploadUtil {
public static final String IMG_DIR = “/img/”;
public static final String IMG_URL_PREFIX ="http://127.0.0.1:8080";
/**
* 将图片上传到服务器
*
* @param imgFile
* @param type
* @return
*/
public static String uploadImg(MultipartFile imgFile, String type) throws IOException ,ImgException{
if (imgFile.getSize() > 1024 * 1024) {
throw new ImgException("上传图片大小不能超过1M！");
}
SimpleDateFormat formater = new SimpleDateFormat("yyyyMMdd");
String dirPath = ImgUploadUtil.IMG_DIR + type + "/" + formater.format(new Date());
File dir = new File(dirPath);
if (!dir.exists()) {
dir.mkdirs();
}
String fileName = ImgUploadUtil.getName(imgFile.getOriginalFilename());
if (!fileName.endsWith("png") && !fileName.endsWith("jpg") && !fileName.endsWith("gif")
&& !fileName.endsWith("jpeg") && !fileName.endsWith("bmp")) {
throw new ImgException("上传图片请为png、jpg、gif、jpeg、bmp中的一种！");
}
//原图,用于点击图片后查看原图
File fileOnServer = new File(dirPath + "/" + fileName);
imgFile.transferTo(fileOnServer);
return dirPath + "/" + fileName;
}
/**
* 依据原始文件名生成新文件名
*
* @return
*/
private static String getName(String fileName) {
Random random = new Random();
return random.nextInt(10000) + System.currentTimeMillis() + ImgUploadUtil.getFileExt(fileName).toLowerCase();
}
/**
* 获取文件扩展名
*
* @return string
*/
private static String getFileExt(String fileName) {
return fileName.substring(fileName.lastIndexOf("."));
}
}
5.上传的阿里云的帮助类OSSClientUtil
public class OSSClientUtil {
Log log = LogFactory.getLog(OSSClientUtil.class);
// endpoint以杭州为例，其它region请按实际情况填写
private String endpoint = "http://oss-cn-hzfinance.aliyuncs.com";
// accessKey
private String accessKeyId = "您的accessKeyId ";
private String accessKeySecret = "您的accessKeySecret ";
//空间
private String bucketName ="您的bucketName ";
//文件存储目录
private String filedir= "data/";
private OSSClient ossClient;
public OSSClientUtil(){
ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);
}
/**
* 初始化
*/
public void init(){
ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);
}
/**
* 销毁
*/
public void destory(){
ossClient.shutdown();
}
/**
* 上传到OSS服务器 如果同名文件会覆盖服务器上的
* @param instream 文件流
* @param fileName 文件名称 包括后缀名
* @return 出错返回"" ,唯一MD5数字签名
*/
public String uploadFile2OSS(InputStream instream ,String fileName){
String ret = "";
try {
//创建上传Object的Metadata
ObjectMetadata objectMetadata=new ObjectMetadata();
objectMetadata.setContentLength(instream .available());
objectMetadata.setCacheControl("no-cache");
objectMetadata.setHeader("Pragma", "no-cache");
objectMetadata.setContentType(getcontentType(fileName.substring(fileName.lastIndexOf("."))));
objectMetadata.setContentDisposition("inline;filename=" + fileName);
//上传文件
PutObjectResult putResult = ossClient.putObject(bucketName, filedir + fileName, instream , objectMetadata);
ret = putResult.getETag();
} catch (IOException e) {
log.error(e.getMessage(),e);
}finally{
try {
instream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return ret;
}
/**
* 从OSS获取文件
* @param filename 文件名
* @return InputStream 调用方法把流关闭 文件不存在返回null
*/
public InputStream downFileFromOSS(String filename){
boolean fileExist = ossClient.doesObjectExist(bucketName, filedir+ filename);
if(!fileExist)
return null;
OSSObject ossObj = ossClient.getObject(bucketName, filedir+ filename);
return ossObj.getObjectContent();
}
/**
* 根据文件名删除OSS服务器上的文件
* @param filename
* @return
*/
public String deleteFile(String filename){
boolean fileExist = ossClient.doesObjectExist(bucketName, filedir+ filename);
if(fileExist){
ossClient.deleteObject(bucketName, filedir+ filename);
return "delok";
}
else
return filename+" not found";
}
/**
* Description: 判断OSS服务文件上传时文件的contentType
* @param FilenameExtension 文件后缀
* @return String
*/
public static String getcontentType(String FilenameExtension){
if(FilenameExtension.equalsIgnoreCase("bmp")){return "image/bmp";}
if(FilenameExtension.equalsIgnoreCase("gif")){return "image/gif";}
if(FilenameExtension.equalsIgnoreCase("jpeg")||
FilenameExtension.equalsIgnoreCase("jpg")||
FilenameExtension.equalsIgnoreCase("png")){return "image/jpeg";}
if(FilenameExtension.equalsIgnoreCase("html")){return "text/html";}
if(FilenameExtension.equalsIgnoreCase("txt")){return "text/plain";}
if(FilenameExtension.equalsIgnoreCase("vsd")){return "application/vnd.visio";}
if(FilenameExtension.equalsIgnoreCase("pptx")||
FilenameExtension.equalsIgnoreCase("ppt")){return "application/vnd.ms-powerpoint";}
if(FilenameExtension.equalsIgnoreCase("docx")||
FilenameExtension.equalsIgnoreCase("doc")){return "application/msword";}
if(FilenameExtension.equalsIgnoreCase("xml")){return "text/xml";}
return "image/jpeg";
}
}
6.需要引入的jar包：gradle配置为：
compile ‘com.aliyun.oss:aliyun-sdk-oss:2.2.3‘
原文：http://www.cnblogs.com/baizhanshi/p/5593431.html