文件云服务器

七牛云

public class TestQiniu {

    // 上传本地文件
    @Test
    public void uploadFile(){
        //构造一个带指定Zone对象的配置类
        Configuration cfg = new Configuration(Zone.zone0());
        //...其他参数参考类注释
        UploadManager uploadManager = new UploadManager(cfg);
        //...生成上传凭证，然后准备上传
        String accessKey = "liyKTcQC5TP1LrhgZH6Xem8zqMXbEtVgfAINP53w";
        String secretKey = "f5zpuzKAPceEMG77-EK3XbwqgOBRDXDawG4UHRtb";
        String bucket = "itcast_health";
        //如果是Windows情况下，格式是 D:\\qiniu\\test.png，可支持中文
        String localFilePath = "D:/2.jpg";
        //默认不指定key的情况下，以文件内容的hash值作为文件名
        String key = null;
        Auth auth = Auth.create(accessKey, secretKey);
        String upToken = auth.uploadToken(bucket);
        try {
            Response response = uploadManager.put(localFilePath, key, upToken);
            //解析上传成功的结果
            DefaultPutRet putRet = new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
            System.out.println(putRet.key);
            System.out.println(putRet.hash);
        } catch (QiniuException ex) {
            Response r = ex.response;
            System.err.println(r.toString());
            try {
                System.err.println(r.bodyString());
            } catch (QiniuException ex2) {
                //ignore
            }
        }
    }
}

  // 删除空间中的文件
    @Test
    public void deleteFile(){
        //构造一个带指定Zone对象的配置类
        Configuration cfg = new Configuration(Zone.zone0());
        //...其他参数参考类注释
        String accessKey = "liyKTcQC5TP1LrhgZH6Xem8zqMXbEtVgfAINP53w";
        String secretKey = "f5zpuzKAPceEMG77-EK3XbwqgOBRDXDawG4UHRtb";
        String bucket = "itcast_health";
        String key = "Fu3Ic6TV6wIbJt793yaGeBmCkzTX";
        Auth auth = Auth.create(accessKey, secretKey);
        BucketManager bucketManager = new BucketManager(auth, cfg);
        try {
            bucketManager.delete(bucket, key);
        } catch (QiniuException ex) {
            //如果遇到异常，说明删除失败
            System.err.println(ex.code());
            System.err.println(ex.response.toString());
        }
    }

Java SDK操作七牛云

使用七牛云提供的Java SDK完成图片上传和删除，参考官方提供的例子

• 上传文件

//构造一个带指定Zone对象的配置类，zone0表示华东地区（默认）
Configuration cfg = new Configuration(Zone.zone0());
//...其他参数参考类注释

UploadManager uploadManager = new UploadManager(cfg);
//...生成上传凭证，然后准备上传
String accessKey = "your access key";
String secretKey = "your secret key";
String bucket = "your bucket name";

//默认不指定key的情况下，以文件内容的hash值作为文件名
String key = null;

try {
    byte[] uploadBytes = "hello qiniu cloud".getBytes("utf-8");
    ByteArrayInputStream byteInputStream=new ByteArrayInputStream(uploadBytes);
    Auth auth = Auth.create(accessKey, secretKey);
    String upToken = auth.uploadToken(bucket);

    try {
        Response response = uploadManager.put(byteInputStream,key,upToken,null, null);
        //解析上传成功的结果
        DefaultPutRet putRet = new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
        System.out.println(putRet.key);
        System.out.println(putRet.hash);
    } catch (QiniuException ex) {
        Response r = ex.response;
        System.err.println(r.toString());
        try {
            System.err.println(r.bodyString());
        } catch (QiniuException ex2) {
            //ignore
        }
    }
} catch (UnsupportedEncodingException ex) {
    //ignore
}

• 删除文件

//构造一个带指定Zone对象的配置类，zone0表示华东地区（默认）
Configuration cfg = new Configuration(Zone.zone0());
//...其他参数参考类注释

String accessKey = "your access key";
String secretKey = "your secret key";

String bucket = "your bucket name";
String key = "your file key";

Auth auth = Auth.create(accessKey, secretKey);
BucketManager bucketManager = new BucketManager(auth, cfg);
try {
    bucketManager.delete(bucket, key);
} catch (QiniuException ex) {
    //如果遇到异常，说明删除失败
    System.err.println(ex.code());
    System.err.println(ex.response.toString());
}

封装工具类

为了方便操作七牛云存储服务，可以将官方提供的案例简单改造成一个工具类，在项目中直接使用此工具类来操作就可以

package com.itheima.utils;

import com.google.gson.Gson;
import com.qiniu.common.QiniuException;
import com.qiniu.common.Zone;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.Configuration;
import com.qiniu.storage.UploadManager;
import com.qiniu.storage.model.DefaultPutRet;
import com.qiniu.util.Auth;

/**
 * 七牛云工具类
 */
public class QiniuUtils {
    public  static String accessKey = "dulF9Wze9bxujtuRvu3yyYb9JX1Sp23jzd3tO708";
    public  static String secretKey = "vZkhW7iot3uWwcWz9vXfbaP4JepdWADFDHVLMZOe";
    public  static String bucket = "qiniutest";

    public static void upload2Qiniu(String filePath,String fileName){
        //构造一个带指定Zone对象的配置类
        Configuration cfg = new Configuration(Zone.zone0());
        UploadManager uploadManager = new UploadManager(cfg);
        Auth auth = Auth.create(accessKey, secretKey);
        String upToken = auth.uploadToken(bucket);
        try {
            Response response = uploadManager.put(filePath, fileName, upToken);
            //解析上传成功的结果
            DefaultPutRet putRet =
                    new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
        } catch (QiniuException ex) {
            Response r = ex.response;
            try {
                System.err.println(r.bodyString());
            } catch (QiniuException ex2) {
                //ignore
            }
        }
    }

    //上传文件（后续使用）
    public static void upload2Qiniu(byte[] bytes, String fileName){
        //构造一个带指定Zone对象的配置类
        Configuration cfg = new Configuration(Zone.zone0());
        //...其他参数参考类注释
        UploadManager uploadManager = new UploadManager(cfg);
        //默认不指定key的情况下，以文件内容的hash值作为文件名
        String key = fileName;
        Auth auth = Auth.create(accessKey, secretKey);
        String upToken = auth.uploadToken(bucket);
        try {
            Response response = uploadManager.put(bytes, key, upToken);
            //解析上传成功的结果
            DefaultPutRet putRet =
                    new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
            System.out.println(putRet.key);
            System.out.println(putRet.hash);
        } catch (QiniuException ex) {
            Response r = ex.response;
            System.err.println(r.toString());
            try {
                System.err.println(r.bodyString());
            } catch (QiniuException ex2) {
                //ignore
            }
        }
    }

    //删除文件（后续使用）
    public static void deleteFileFromQiniu(String fileName){
        //构造一个带指定Zone对象的配置类
        Configuration cfg = new Configuration(Zone.zone0());
        String key = fileName;
        Auth auth = Auth.create(accessKey, secretKey);
        BucketManager bucketManager = new BucketManager(auth, cfg);
        try {
            bucketManager.delete(bucket, key);
        } catch (QiniuException ex) {
            //如果遇到异常，说明删除失败
            System.err.println(ex.code());
            System.err.println(ex.response.toString());
        }
    }
}

实际应用