七牛云java基础版本

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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());      }    }}

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