上传文件至oss服务器

阿里云文件上传oss服务：

步骤：

1.登录阿里云申请账号，开通oss图片存储服务；

2.登录控制台oss新建bucket（注意命名规范，设置公共读写）；

3.获取key和secret

4.下载javasdk导入项目中

5.上传文件到阿里云的方法和直接从阿里云下载文件的方法如下：

public void uploadFileToOss(String key, String filename){
File file = new File(filename);
    ObjectMetadata objectMeta = new ObjectMetadata();
    objectMeta.setContentLength(file.length());
    objectMeta.setContentType("image/jpeg");
    InputStream input;
try {
input = new FileInputStream(file);
OSSClient client = initParam.getOssClient();
client.putObject(initParam.getBucketName(), key, input, objectMeta);
} catch (FileNotFoundException e) {
logger.error("找不到文件："+filename);
e.printStackTrace();
}catch(OSSException oe){
logger.error("OSSException");
oe.printStackTrace();
}catch(ClientException ce){
logger.error("ClientException");
ce.printStackTrace();
}
}
public void downFileFromOss(String key, String filename,
HttpServletRequest request,HttpServletResponse response){
OutputStream outStream=null;
try{
outStream=response.getOutputStream();
ServletUtils.setFileDownloadHeader(request, response, filename);
OSSClient client = initParam.getOssClient();
GetObjectRequest getObjectRequest = new GetObjectRequest(initParam.getBucketName(), key);
        OSSObject ossObject = client.getObject(getObjectRequest);
byte[] buffer = new byte[1024];
        int bytesRead=0;
        outStream = response.getOutputStream();
        while ((bytesRead = ossObject.getObjectContent().read(buffer)) > -1) {
        outStream.write(buffer, 0, bytesRead);
        }
        outStream.flush();
} catch (UnsupportedEncodingException e) {
logger.error("下载文件失败",e);
} catch (IOException e) {
logger.error("下载文件失败",e);
}finally{
if(outStream != null){
try {
outStream.close();
} catch (IOException e) {
logger.error("关闭输入流失败",e);
}
}
}
}