java-文件上传

一、图片上传

文件上传一般使用云服务器，常见的云服务器有阿里云，七牛云服务器。
这里使用七牛云

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;
public class QiniuUtils {

        public  static String accessKey ="你自己七牛云的key";
        public  static String secretKey = "七牛云的密码";
        public  static String bucket = "lhsss";

        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.zone1());
            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
        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.zone1());
            //...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
        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.zone1());
            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());
            }
        }
    }

上传图片时调用的方法

  QiniuUtils.upload2Qiniu(file.getBytes(), fileName);

第一个参数为数组的字节，第二为文件的名字