上傳檔案到阿里雲，程式碼如下：

1 .需要匯入的jar

java：

        private static final String ACCESS_KEY = "YOUR ACCESS_KEY";

private static final String ACCESS_SCRECT = "YOUR ACCESS_SCRECT";

private static final String OSS_ENDPOINT = "http://oss-cn-beijing.aliyuncs.com/"; 不用變

private static OSSClient client;

      可以使用ClientConfiguration物件設定代理伺服器、最大重試次數等引數。
      初始化OSSClient
 
public OSSClient getClient(){

if(client == null ){
client = new OSSClient(OSS_ENDPOINT, ACCESS_KEY, ACCESS_SCRECT);
}
return client;

}

 @param bucketName 在阿里雲設定的
 @param key阿里雲的檔案及結構 + 檔名字（附帶字尾）     temp/"+date+"/"+test.jpg
 @param localFileUrl 儲存本地檔案路徑 + 檔名字 
                                  request.getSession().getServletContext().getRealPath("/")+"/temp" + picName
 @param contentType  檔案格式
public void uploadFile(String bucketName, String key, String localFileUrl, String contentType){
OSSClient client = this.getClient();
File file = new File(localFileUrl);
InputStream in;

try {
in = new FileInputStream(file);
ObjectMetadata object = new ObjectMetadata();
object.setContentLength(in.available());
object.setContentType(contentType);
client.putObject(bucketName, key, in,object);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
client.shutdown();
}
}