七牛云java基础版本

Posted 2022-12-05 SDingBa

最近用到了七牛云,挺好用的,先来讲一下官方的demo,之后会上传一个自己封装的utils.java文件

本文以 图片为例
更具体的请查看我的下一篇博客,关于七牛云的…….
g
Gradle :
compile 'com.qiniu:qiniu-java-sdk:7.x.+'

MAVEN:

<dependency>
<groupId>com.qiniu</groupId>
<artifactId>qiniu-java-sdk</artifactId>
<version>[7.0.0, 7.1.99]</version>
</dependency>

———-七牛云存储 是一种键值对的方式存储的形式,有点像redis 等NoSql存储
u
–如果是公开文件的话,在七牛云找到对应的url+key就能直接访问.

//设置好账号的ACCESS_KEY和SECRET_KEY
String ACCESS_KEY = “Access_Key”;
String SECRET_KEY = “Secret_Key”;
上面的 key 都是官方对应的key,每个账号都是唯一的,最好不要告诉别人.
//要上传的空间
String bucketname = “Bucket_Name”;
上面的bucketname是上传的空间名称,需要自己在七牛云上面创建空间.
//上传到七牛后保存的文件名
String key = “my-java.png”;
上面的key表示你上传文件的名称(key值)
//上传文件的路径
String FilePath = “/…/…”;
文件上传的路径,对应本地电脑的文件路径,后续讲解怎么从浏览器的方式上传文件到服务器,然后上传到七牛云.

———-以下是官方的简单demo
简单上传

import com.qiniu.util.Auth;
import java.io.IOException;
import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.UploadManager;

public class UploadDemo 
  //设置好账号的ACCESS_KEY和SECRET_KEY
  String ACCESS_KEY = "Access_Key";
  String SECRET_KEY = "Secret_Key";
  //要上传的空间
  String bucketname = "Bucket_Name";
  //上传到七牛后保存的文件名
  String key = "my-java.png";
  //上传文件的路径
  String FilePath = "/.../...";

  //密钥配置
  Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
  //创建上传对象
  UploadManager uploadManager = new UploadManager();

  //简单上传，使用默认策略，只需要设置上传的空间名就可以了
  public String getUpToken()
      return auth.uploadToken(bucketname);
  

  public void upload() throws IOException
    try 
      //调用put方法上传
      Response res = uploadManager.put(FilePath, key, getUpToken());
      //打印返回的信息
      System.out.println(res.bodyString()); 
       catch (QiniuException e) 
          Response r = e.response;
          // 请求失败时打印的异常的信息
          System.out.println(r.toString());
          try 
              //响应的文本信息
            System.out.println(r.bodyString());
           catch (QiniuException e1) 
              //ignore
          
             
  

  public static void main(String args[]) throws IOException  
    new UploadDemo().upload();
  

---

覆盖上传

import java.io.IOException;

import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.UploadManager;
import com.qiniu.util.Auth;
import com.qiniu.util.StringMap;

public class UploadDemo 
  //设置好账号的ACCESS_KEY和SECRET_KEY
  String ACCESS_KEY = "Access_Key";
  String SECRET_KEY = "Secret_Key";
  //要上传的空间
  String bucketname = "Bucket_Name";
  //上传到七牛后保存的文件名
  String key = "my-java.png";
  //上传文件的路径
  String filePath = "/.../...";

  //密钥配置
  Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
  //创建上传对象
  UploadManager uploadManager = new UploadManager();

  // 覆盖上传
  public String getUpToken()
    //<bucket>:<key>，表示只允许用户上传指定key的文件。在这种格式下文件默认允许“修改”，已存在同名资源则会被本次覆盖。
      return auth.uploadToken(bucketname, key);
  

  public void upload() throws IOException
    try 
      //调用put方法上传，这里指定的key和上传策略中的key要一致
      Response res = uploadManager.put(filePath, key, getUpToken());
      //打印返回的信息
      System.out.println(res.bodyString()); 
       catch (QiniuException e) 
          Response r = e.response;
          // 请求失败时打印的异常信息
          System.out.println(r.toString());
          try 
              //响应的文本信息
            System.out.println(r.bodyString());
           catch (QiniuException e1) 
              //ignore
          
             
  

  public static void main(String args[]) throws IOException  
    new UploadDemo().upload();
  

---

下载文件下载文件适合私有空间的存储

import com.qiniu.util.Auth;
public class DownloadDemo 
   //设置好账号的ACCESS_KEY和SECRET_KEY
   String ACCESS_KEY = "Access_Key";
   String SECRET_KEY = "Secret_Key";
   //密钥配置
   Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
   //构造私有空间需要生成的下载的链接
   String URL = "http://bucketdomain/key";

   public void download()
     //调用privateDownloadUrl方法生成下载链接,第二个参数可以设置Token的过期时间
     String downloadRUL = auth.privateDownloadUrl(URL,3600);
     System.out.println(downloadRUL);
   
   public static void main(String args[])
     new DownloadDemo().download();
   

---

管理文件 获取文件的信息

import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.model.FileInfo;
import com.qiniu.util.Auth;

public class BucketManagerDemo 

  public static void main(String args[])
    //设置需要操作的账号的AK和SK
    String ACCESS_KEY = "Access_Key";
    String SECRET_KEY = "Secret_Key";
    Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
    //实例化一个BucketManager对象
    BucketManager bucketManager = new BucketManager(auth);
    //要测试的空间和key，并且这个key在你空间中存在
    String bucket = "Bucket_Name";
    String key = "Bucket_key";
    try 
      //调用stat()方法获取文件的信息
      FileInfo info = bucketManager.stat(bucket, key);
      System.out.println(info.hash);
      System.out.println(info.key);
     catch (QiniuException e) 
      //捕获异常信息
      Response r = e.response;
      System.out.println(r.toString());
    
  

———-移动单个文件

import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.model.FileInfo;
import com.qiniu.util.Auth;

public class BucketManagerDemo 

  public static void main(String args[])
    //设置需要操作的账号的AK和SK
    String ACCESS_KEY = "Access_Key";
    String SECRET_KEY = "Secret_Key";
    Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
    //实例化一个BucketManager对象
    BucketManager bucketManager = new BucketManager(auth);
    //要测试的空间和key，并且这个key在你空间中存在
    String bucket = "Bucket_Name";
    String key = "Bucket_key";
    //将文件从文件key移动到文件key2, 可以在不同bucket移动，同空间移动相当于重命名
    String key2 = "yourjavakey";
    try 
      //调用move方法移动文件
      bucketManager.move(bucket, key, bucket, key2);
     catch (QiniuException e) 
      //捕获异常信息
      Response r = e.response;
      System.out.println(r.toString());
    
  

———-复制单个文件

import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.model.FileInfo;
import com.qiniu.util.Auth;

public class BucketManagerDemo 

  public static void main(String args[])
    //设置需要操作账号的AK和SK
    String ACCESS_KEY = "Access_Key";
    String SECRET_KEY = "Secret_Key";
    Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
    //实例化一个BucketManager对象
    BucketManager bucketManager = new BucketManager(auth);
    //要测试的空间和key，并且这个key在你空间中存在
    String bucket = "Bucket_Name";
    String key = "Bucket_key";
    //将文件从文件key复制到文件key2，可以在不同bucket复制
    String key2 = "yourjavakey";
    try 
      //调用copy方法移动文件
      bucketManager.copy(bucket, key, bucket, key2);
     catch (QiniuException e) 
      //捕获异常信息
      Response r = e.response;
      System.out.println(r.toString());
    
  

———-删除单个文件

import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.model.FileInfo;
import com.qiniu.util.Auth;

public class BucketManagerDemo 

  public static void main(String args[])
    //设置需要操作账号的AK和SK
    String ACCESS_KEY = "Access_Key";
    String SECRET_KEY = "Secret_Key";
    Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
    //实例化一个BucketManager对象
    BucketManager bucketManager = new BucketManager(auth);
    //要测试的空间和key，并且这个key在你空间中存在
    String bucket = "Bucket_Name";
    String key = "Bucket_key";
    try 
      //调用delete方法移动文件
      bucketManager.delete(bucket, key);
     catch (QiniuException e) 
      //捕获异常信息
      Response r = e.response;
      System.out.println(r.toString());
    
  

---

列举文件条目

import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.model.FileInfo;
import com.qiniu.storage.model.FileListing;
import com.qiniu.util.Auth;


public class ListDemo 
  public static void main(String args[])
      //设置需要操作账号的AK和SK
      String ACCESS_KEY = "Access_Key";
      String SECRET_KEY = "Secret_Key";
      Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);

      //实例化一个BucketManager对象
      BucketManager bucketManager = new BucketManager(auth);

      //要列举文件的空间名
      String bucket = "yourbucket";

      try 
        //调用listFiles方法列举指定空间的指定文件
        //参数一：bucket    空间名
        //参数二：prefix    文件名前缀
        //参数三：marker    上一次获取文件列表时返回的marker
        //参数四：limit     每次迭代的长度限制，最大1000，推荐值100
        //参数五：delimiter 指定目录分隔符，列出所有公共前缀（模拟列出目录效果）。缺省值为空字符串
        FileListing fileListing = bucketManager.listFiles(bucket,null,null,10,null);
        FileInfo[] items = fileListing.items;
        for(FileInfo fileInfo:items)
          System.out.println(fileInfo.key);
        
       catch (QiniuException e) 
        //捕获异常信息
        Response r = e.response;
        System.out.println(r.toString());
      
    

---

抓取文件

import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.util.Auth;


public class FetchDemo 
  public static void main(String args[])
      //设置需要操作账号的AK和SK
      String ACCESS_KEY = "Access_Key";
      String SECRET_KEY = "Secret_Key";
      Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);

      //实例化一个BucketManager对象
      BucketManager bucketManager = new BucketManager(auth);

      //文件保存的空间名和文件名
      String bucket = "yourbucket";
      String key = "yourkey";

      //要fetch的url
      String url = "url";

      try 
        //调用fetch方法抓取文件
        bucketManager.fetch(url, bucket,key);
       catch (QiniuException e) 
        //捕获异常信息
        Response r = e.response;
        System.out.println(r.toString());
      
    

---

批量操作文件

import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.model.FileInfo;
import com.qiniu.storage.model.FileListing;
import com.qiniu.util.Auth;


public class BatchDemo 
  public static void main(String args[])
      //设置需要操作账号的AK和SK
      String ACCESS_KEY = "Access_Key";
      String SECRET_KEY = "Secret_Key";
      Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);

      //实例化一个BucketManager对象
      BucketManager bucketManager = new BucketManager(auth);

      //创建Batch类型的operations对象
      BucketManager.Batch operations = new BucketManager.Batch();

      //第一组源空间名、原文件名，目的空间名、目的文件名
      String bucketFrom1 = "yourbucket";
      String keyFrom1 = "srckey1";
      String bucketTo1 = "yourbucket";
      String keyTo1 = "destkey1";

      //第二组源空间名、原文件名，目的空间名、目的文件名
      String bucketFrom2 = "yourbucket";
      String keyFrom2 = "srckey2";
      String bucketTo2 = "yourbucket";
      String keyTo2 = "destkey2";

      try 
        //调用批量操作的batch方法
        Response res = bucketManager.batch(operations.move(bucketFrom1, keyFrom1, bucketTo1, keyTo1)
            .move(bucketFrom2, keyFrom2, bucketTo2, keyTo2));

        System.out.println(res.toString());

       catch (QiniuException e) 
        //捕获异常信息
        Response r = e.response;
        System.out.println(r.toString());