大家好,我是雄雄。
前言
最近阳了,第二条杠红的发紫,真难受啊,但是吧,博客上有个bug
,不解决感觉比阳了还难受。
话还是要从博客的图片显示不出来这里说起,当时做的时候,在发文章这里,感觉没有封面的话,文章会很孤单,所以就设计了个封面这块儿。但是,封面如果太邋遢也还不如没有。
所以我就从网上的一个接口里面随机取的一些精美图片,本来好好的,结果今天一看,那个接口报错403
了,当时就想着,这样做太依赖别人了,什么东西都得掌控在自己手里,不然出问题了难受的还是自己。
正好借这个机会,就重新设计了下,先从接口中取,如果接口中的图片能看,则用这个图片,顺便将这个图片传至七牛云存储中,否则就随机从七牛云存储中指定些图片展示出来,这样就不会受制于人。
效果图
直接将图片传至七牛云中,给我们返回该图片的地址。
代码实现
因为七牛云上传图片的时候,传递的是MultipartFile
类型,所以我们需要将网络图片utl
转换成流,然后在转换成MultipartFile
,接着使用七牛云提供的方法上传即可。
下面我们先看看怎么将网络url
转换成MultipartFile
,这个代码网上很多,大家可以随便搜一个放上来就行,我这边封装了个工具类:FilesUtil
package com.shiyi.util;import com.baomidou.mybatisplus.core.toolkit.ObjectUtils;
import org.apache.http.entity.ContentType;
import org.apache.pdfbox.io.IOUtils;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.web.multipart.MultipartFile;import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;/*** @author: muxiongxiong* @date: 2022年12月29日 15:35* 博客:https://blog.csdn.net/qq_34137397* 个人站:https://www.穆雄雄.com* 个人站:https://www.muxiongxiong.cn* @Description: 类的描述*/
public class FilesUtil {/*** 根据地址获得数据的输入流** @param strUrl 网络连接地址* @return url的输入流*/public static InputStream getInputStreamByUrl(String strUrl) {HttpURLConnection conn = null;try {URL url = new URL(strUrl);conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("GET");conn.setConnectTimeout(20 * 1000);final ByteArrayOutputStream output = new ByteArrayOutputStream();IOUtils.copy(conn.getInputStream(), output);return new ByteArrayInputStream(output.toByteArray());} catch (Exception e) {e.printStackTrace();} finally {try {if (conn != null) {conn.disconnect();}} catch (Exception e) {e.printStackTrace();}}return null;}/*** 将网络地址转换成MultipartFile* @param strUrl* @return*/public static MultipartFile onlineAddressTransferFile(String strUrl){MultipartFile file = null;try {String fileName = strUrl.substring(strUrl.lastIndexOf("/") + 1);InputStream stream = getInputStreamByUrl(strUrl);if (!ObjectUtils.isEmpty(stream)) {file = new MockMultipartFile(fileName, fileName, "", stream);return file;}}catch (Exception exception){exception.printStackTrace();}return file;}}
在调用的时候我们这样调:
/*** 手动上传网络图片*/@GetMapping(value = "/uploadFm")public ResponseResult uploadFm(){MultipartFile multipartFile = FilesUtil.onlineAddressTransferFile("https://img-community.csdnimg.cn/images/86f32eac875e42af9ed9e91b809dc7d8.png");return cloudOssService.upload(multipartFile);}
剩下的就是七牛云里面的方法了,这边一起放上来吧:
CloudOssService
接口代码:
package com.shiyi.service;import com.shiyi.common.ResponseResult;
import org.springframework.web.multipart.MultipartFile;public interface CloudOssService {/*** 上传* @param file 文件* @return*/ResponseResult upload(MultipartFile file);/*** 批量删除文件* @param key 文件名* @return*/ResponseResult delBatchFile(String ...key);
}
CloudOssServiceImpl
实现类,主要是实现CloudOssService
接口的:
package com.shiyi.service.impl;import com.shiyi.common.ResponseResult;import com.shiyi.enums.FileUploadModelEnum;
import com.shiyi.service.CloudOssService;
import com.shiyi.service.SystemConfigService;
import com.shiyi.strategy.context.FileUploadStrategyContext;
import lombok.RequiredArgsConstructor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;import java.util.Objects;@Service
@RequiredArgsConstructor
public class CloudOssServiceImpl implements CloudOssService {private final SystemConfigService systemConfigService;private final FileUploadStrategyContext fileUploadStrategyContext;private String strategy;/*** 上传文件* @param file* @return*/@Overridepublic ResponseResult upload(MultipartFile file) {if (file.getSize() > 1024 * 1024 * 10) {return ResponseResult.error("文件大小不能大于10M");}//获取文件后缀String suffix = Objects.requireNonNull(file.getOriginalFilename()).substring(file.getOriginalFilename().lastIndexOf(".") + 1);if (!"jpg,jpeg,gif,png".toUpperCase().contains(suffix.toUpperCase())) {return ResponseResult.error("请选择jpg,jpeg,gif,png格式的图片");}getFileUploadWay();String key = fileUploadStrategyContext.executeFileUploadStrategy(strategy, file, suffix);return ResponseResult.success(key);}/*** 删除文件* @param key* @return*/@Overridepublic ResponseResult delBatchFile(String ...key) {getFileUploadWay();Boolean isSuccess = fileUploadStrategyContext.executeDeleteFileStrategy(strategy, key);if (!isSuccess) {return ResponseResult.error("删除文件失败");}return ResponseResult.success();}private void getFileUploadWay() {strategy = FileUploadModelEnum.getStrategy(systemConfigService.getCustomizeOne().getFileUploadWay());}
}
最后是文件上传策略上下文类:
package com.shiyi.strategy.context;import com.shiyi.strategy.FileUploadStrategy;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;import java.util.Map;/*** @apiNote 文件上传策略上下文*/
@Service
@RequiredArgsConstructor
public class FileUploadStrategyContext {private final Map<String, FileUploadStrategy> fileUploadStrategyMap;/*** 执行文件上传策略** @param file 文件对象* @return {@link String} 文件名*/public String executeFileUploadStrategy(String fileUploadMode, MultipartFile file,String suffix) {return fileUploadStrategyMap.get(fileUploadMode).fileUpload(file,suffix);}/*** 删除文件策略* @param fileUploadMode* @param key* @return*/public Boolean executeDeleteFileStrategy(String fileUploadMode,String ...key) {return fileUploadStrategyMap.get(fileUploadMode).deleteFile(key);}
}
QiNiuUploadStrategyImpl
实现类的代码:
package com.shiyi.strategy.imp;import com.alibaba.fastjson.JSON;
import com.qiniu.common.QiniuException;
import com.qiniu.http.Response;
import com.qiniu.storage.BucketManager;
import com.qiniu.storage.Configuration;
import com.qiniu.storage.Region;
import com.qiniu.storage.UploadManager;
import com.qiniu.storage.model.BatchStatus;
import com.qiniu.storage.model.DefaultPutRet;
import com.qiniu.storage.model.FileInfo;
import com.qiniu.util.Auth;
import com.shiyi.entity.SystemConfig;
import com.shiyi.enums.QiNiuAreaEnum;
import com.shiyi.service.SystemConfigService;
import com.shiyi.strategy.FileUploadStrategy;
import com.shiyi.util.UUIDUtils;
import lombok.RequiredArgsConstructor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;import javax.annotation.PostConstruct;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;@Service("qiNiuUploadStrategyImpl")
@RequiredArgsConstructor
public class QiNiuUploadStrategyImpl implements FileUploadStrategy {private final Logger logger = LoggerFactory.getLogger(QiNiuUploadStrategyImpl.class);private final SystemConfigService systemConfigService;private String qi_niu_accessKey;private String qi_niu_secretKey;private String qi_niu_bucket;private Region region;private String qi_niu_url;@PostConstructprivate void init(){SystemConfig systemConfig = systemConfigService.getCustomizeOne();qi_niu_accessKey = systemConfig.getQiNiuAccessKey();qi_niu_secretKey = systemConfig.getQiNiuSecretKey();qi_niu_bucket = systemConfig.getQiNiuBucket();qi_niu_url = systemConfig.getQiNiuPictureBaseUrl();region = QiNiuAreaEnum.getRegion(systemConfig.getQiNiuArea());}public void list() {Configuration configuration = new Configuration(region);Auth auth = Auth.create(qi_niu_accessKey, qi_niu_secretKey);BucketManager bucketManager = new BucketManager(auth,configuration);BucketManager.FileListIterator fileListIterator = bucketManager.createFileListIterator(qi_niu_bucket, null, 1000, null);while (fileListIterator.hasNext()) {FileInfo[] next = fileListIterator.next();for (FileInfo fileInfo : next) {logger.info("文件打印开始,文件名:{}",qi_niu_url + fileInfo.key);logger.info("文件类别打印开始,类别:{}",fileInfo.mimeType);logger.info("文件大小打印开始,大小:{}",fileInfo.fsize);}}}/*** 七牛云文件上传* @param file 文件* @param suffix 后缀* @return*/@Overridepublic String fileUpload(MultipartFile file,String suffix) {String key = null;//构造一个带指定 Region 对象的配置类Configuration cfg = new Configuration(region);//...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Auth auth = Auth.create(qi_niu_accessKey, qi_niu_secretKey);String upToken = auth.uploadToken(qi_niu_bucket);InputStream inputStream = null;try {inputStream = file.getInputStream();//这里需要处理一下,不能让每次上去都是个UUID的文件名Response response = uploadManager.put(inputStream, "blog/"+UUIDUtils.getUuid() + "." + suffix, upToken,null,null);//解析上传成功的结果DefaultPutRet putRet = JSON.parseObject(response.bodyString(),DefaultPutRet.class);key = qi_niu_url + putRet.key;} catch (QiniuException ex) {Response r = ex.response;logger.error("QiniuException:{}",r.toString());} catch (IOException e) {e.printStackTrace();}finally {if (inputStream != null){try {inputStream.close();} catch (IOException e) {e.printStackTrace();}}}return key;}/*** 批量删除文件* @return*/@Overridepublic Boolean deleteFile(String ...keys) {//构造一个带指定 Region 对象的配置类Configuration cfg = new Configuration(Region.region2());//...其他参数参考类注释Auth auth = Auth.create(qi_niu_accessKey, qi_niu_secretKey);BucketManager bucketManager = new BucketManager(auth, cfg);try {BucketManager.BatchOperations batchOperations = new BucketManager.BatchOperations();batchOperations.addDeleteOp(qi_niu_bucket, keys);Response response = bucketManager.batch(batchOperations);BatchStatus[] batchStatusList = response.jsonToObject(BatchStatus[].class);for (int i = 0; i < keys.length; i++) {BatchStatus status = batchStatusList[i];String key = keys[i];System.out.print(key + "\t");if (status.code == 200) {System.out.println("delete success");} else {System.out.println(status.data.error);}}return true;} catch (QiniuException ex) {System.err.println(ex.response.toString());return false;}}}
然后我们从接口里面直接调用即可上传上去。