java实现文件上传到七牛服务器

1、基于七牛云存储服务构建的应用，

基本架构

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2、引入七牛jar包

 
        <dependency>
            <groupId>com.qiniugroupId>
            <artifactId>sdkartifactId>
            <version>6.1.0version>
        dependency>

---

3、代码:

import com.qiniu.api.auth.AuthException;
import com.qiniu.api.auth.digest.Mac;
import com.qiniu.api.config.Config;
import com.qiniu.api.io.IoApi;
import com.qiniu.api.io.PutExtra;
import com.qiniu.api.io.PutRet;
import com.qiniu.api.rs.GetPolicy;
import com.qiniu.api.rs.PutPolicy;
import com.qiniu.api.rs.RSClient;
import com.qiniu.api.rs.URLUtils;
import org.json.JSONException;

import java.io.ByteArrayInputStream;
import java.io.File;

/**
 * Created by shadow on 2015/11/28.
 *
 */
public class QiniuServiceImpl {

    private String bucketName;
    private String domain;

    public void setDomain(String domain) {

        this.domain = domain;
    }

    public void setBucketName(String bucketName) {
        this.bucketName = bucketName;
    }
    //设置AccessKey
    public void setAccessKey(String key) {
        Config.ACCESS_KEY = key;
    }
    //设置SecretKey
    public void setSecretKey(String key) {
        Config.SECRET_KEY = key;
    }

    //通过文件路径上传文件
    public boolean uploadFile(String localFile) throws AuthException, JSONException {
        File file = new File(localFile);
        return uploadFile(file);
    }

    //通过File上传
    public boolean uploadFile(File file) throws AuthException, JSONException {
        String uptoken = getUpToken();

        // 可选的上传选项，具体说明请参见使用手册。
        PutExtra extra = new PutExtra();

        // 上传文件
        PutRet ret = IoApi.putFile(uptoken, file.getName(), file.getAbsolutePath(), extra);

        if (ret.ok()) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * 从 inputstream 中写入七牛
     * @param key 文件名
     * @param content 要写入的内容
     * @return
     * @throws AuthException
     * @throws JSONException
     */
    public boolean uploadFile(String key, String content) throws AuthException, JSONException {
        // 读取的时候按的二进制，所以这里要同一
        ByteArrayInputStream inputStream = new ByteArrayInputStream(content.getBytes());

        String uptoken = getUpToken();

        // 可选的上传选项，具体说明请参见使用手册。
        PutExtra extra = new PutExtra();

        // 上传文件
        PutRet ret = IoApi.Put(uptoken, key, inputStream, extra);

        if (ret.ok()) {
            return true;
        } else {
            return false;
        }
    }

    //获得下载地址
    public String getDownloadFileUrl(String filename) throws Exception {
        Mac mac = getMac();
        String baseUrl = URLUtils.makeBaseUrl(domain, filename);
        GetPolicy getPolicy = new GetPolicy();
        String downloadUrl = getPolicy.makeRequest(baseUrl, mac);
        return downloadUrl;
    }

    //删除文件
    public void deleteFile(String filename) {
        Mac mac = getMac();
        RSClient client = new RSClient(mac);
        client.delete(domain, filename);
    }

    //获取凭证
    private String getUpToken() throws AuthException, JSONException {
        Mac mac = getMac();
        PutPolicy putPolicy = new PutPolicy(bucketName);
        String uptoken = putPolicy.token(mac);
        return uptoken;
    }

    private Mac getMac() {
        Mac mac = new Mac(Config.ACCESS_KEY, Config.SECRET_KEY);
        return mac;
    }

}

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4、测试

import com.qiniu.api.auth.AuthException;
import org.json.JSONException;
import org.junit.Before;
import org.junit.Test;

import java.io.File;


/**
 * Created by shadow on 2015/11/29.
 */
public class QiniuTest {
    private QiniuServiceImpl qiniuService = null;

    @Test
    @Before
    public void init() {
        qiniuService = new QiniuServiceImpl();
        //设置AccessKey
        qiniuService.setAccessKey("***********");
        //设置SecretKey
        qiniuService.setSecretKey("***********");
        //设置存储空间
        qiniuService.setBucketName("**********");
        //设置七牛域名
        qiniuService.setDomain("***********");
    }

    @Test
    public void testUpload() throws AuthException, JSONException {
        File file = new File("C:/shadow.jpg");
        qiniuService.uploadFile(file);
    }

    @Test
    public void testDownloadFileUrl() throws Exception {
        String filePath = qiniuService.getDownloadFileUrl("shadow.jpg");
        System.out.println("file path == " + filePath);
    }
}