概述
OSS的集成上传和下载提供了SDK可以直接使用，但实际使用中一些用户受限环境或者设备限制需要使用api方式来实现上传和下载，本文以PutObject接口为例，提供了java实现的demo。
注：建议优先使用OSS提供SDK，本文提供的只是签名实现上传demo，实际使用中需要结合业务来进行改动代码
详细信息
PutObject实现demo（测试环境JDK1.8）：
import org.apache.commons.codec.binary.Base64;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.*;
public class OssSignHeader {
private static final String HMAC_SHA1_ALGORITHM = "HmacSHA1";
private final static String CHARSET_UTF8 = "utf8";
private final static String ALGORITHM = "HmacSHA1";
public static String hmacSha1(String data, String key) {
try {
Mac mac = Mac.getInstance(HMAC_SHA1_ALGORITHM);
SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), ALGORITHM);
mac.init(keySpec);
byte[] rawHmac;
rawHmac = mac.doFinal(data.getBytes(CHARSET_UTF8));
return new String(Base64.encodeBase64(rawHmac));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static String buildSignData(String Date,String VERB,String CanonicalizedResource){
String signData = "PUT" + "\n"+ "\n"+ "\n"
+ Date + "\n"
+ CanonicalizedResource;
return signData;
}
public static String getGMTDate(){
Calendar cd = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss 'GMT'", Locale.US);
sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
String str = sdf.format(cd.getTime());
return str;
}
public static void main(String[] args) throws Exception{
String date = getGMTDate();
String ossBucket= "您的bucket名称";
String accessKeyId= "您的AccessKey";
String secretAccessKey= "您的AccessSecret";
String resourcePath = "/xx/panda/102283/111.txt";
String resourcePath1 = "panda/102283/111.txt";
String VERB = "GET";
String url = "http://"+ossBucket+".oss-cn-hangzhou.aliyuncs.com/";
String Signature = (hmacSha1(buildSignData(date,VERB,resourcePath),secretAccessKey));
String Authorization = "OSS " + accessKeyId + ":" + Signature;
System.out.println(Authorization);
Map<String,String> head = new HashMap<String,String>();
head.put("Date",date);
head.put("Authorization",Authorization);
URL url1 = new URL(url + resourcePath1);
HttpURLConnection connection ;
StringBuffer sbuffer=null;
try {
//添加 请求内容
connection= (HttpURLConnection) url1.openConnection();
//设置http连接属性
connection.setDoOutput(true);// http正文内，因此需要设为true, 默认情况下是false;
connection.setRequestMethod("PUT"); // 可以根据需要 提交 GET、POST、DELETE、PUT等http提供的功能
//connection.setUseCaches(false);//设置缓存，注意设置请求方法为post不能用缓存
// connection.setInstanceFollowRedirects(true);
connection.setRequestProperty("Date", date); //设置请 求的服务器网址，域名，例如***.**.***.***
connection.setRequestProperty("Authorization", Authorization);//设定 请求格式 json，也可以设定xml格式的
//connection.setRequestProperty("Content-Length", obj.toString().getBytes().length + ""); //设置文件请求的长度
connection.setReadTimeout(10000);//设置读取超时时间
connection.setConnectTimeout(10000);//设置连接超时时间
connection.connect();
OutputStream out = connection.getOutputStream();//向对象输出流写出数据，这些数据将存到内存缓冲区中
out.write(new String("测试数据").getBytes()); //out.write(new String("测试数据").getBytes()); //刷新对象输出流，将任何字节都写入潜在的流中
out.flush();
// 关闭流对象,此时，不能再向对象输出流写入任何数据，先前写入的数据存在于内存缓冲区中
out.close();
//读取响应
if (connection.getResponseCode()==200) {
// 从服务器获得一个输入流
InputStreamReader inputStream =new InputStreamReader(connection.getInputStream());//调用HttpURLConnection连接对象的getInputStream()函数, 将内存缓冲区中封装好的完整的HTTP请求电文发送到服务端。
BufferedReader reader = new BufferedReader(inputStream);
String lines;
sbuffer= new StringBuffer("");
while ((lines = reader.readLine()) != null) {
lines = new String(lines.getBytes(), "utf-8");
sbuffer.append(lines); }
reader.close();
}else{
System.out.println(connection.getResponseCode());
}
//断开连接
connection.disconnect();
System.out.println("OK "+url1);
} catch (IOException e) {
e.printStackTrace();
}
}
}