第三方API之图片上传

第三方图片上传_腾讯视频

视频：https://v.qq.com/x/page/m052917m1ia.html

PPT：https://github.com/WuZhiyong1759/xiaoketangPPT/tree/master/XKT2017%E5%B9%B47%E6%9C%8825%E6%97%A5PPT

1.背景介绍

在程序开发过程中，我们总是会碰到需要图片管理相关的功能，如更改头像，相册上传图片呀，网站的banner图的后台管理呀等等。那么这个图片具体是怎么上传的呢？

2.知识剖析

本次课程内容将使用七牛云的对象存贮

3.常见问题

实现图片上传的代码是怎样的呢？

4.解决方案

查看七牛云的官方API文档

5.编码实

----------------------------------------------------------------------控制器---------------------------------------------------------------------

@RequestMapping("/upload/images")

publicStringupLoadImages(String file)throwsClassNotFoundException,UnsupportedLookAndFeelException,InstantiationException,IllegalAccessException {

imagesUtil.UpLoadImgs(file);

return"home";

}

@RequestMapping("/delete/images")

publicStringdeleteImages(String file){

imagesUtil.DeleteImgs(file);

return"login";

}

-----------------------------------------------------封装了上传和删除功能的类---------------------------------------------------------------

public classImagesUtil {

private staticStringaccessKey=null;

private staticStringsecretKey=null;

private staticStringbucket=null;

private staticConfigurationcfg;

publicImagesUtil(String accessKey,String secretKey,String bucket){

this.accessKey=accessKey;

this.secretKey=secretKey;

this.bucket=bucket;

//构造一个带指定Zone对象的配置类

this.cfg=newConfiguration(Zone.zone2());

}

public  voidUpLoadImgs(String file)throwsClassNotFoundException,UnsupportedLookAndFeelException,InstantiationException,IllegalAccessException {

//打开文件选择框，

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

JFileChooser fc=newJFileChooser();

fc.showOpenDialog(null);

String filePath=""+fc.getSelectedFile();

System.out.println("选择的文件路径："+filePath);//输出文件路径

String newURL = filePath.replaceAll("\\\\","\\\\"+"\\\\");

System.out.println("转义后的文件路径："+newURL);

//...其他参数参考类注释

UploadManager uploadManager =newUploadManager(cfg);

//...生成上传凭证，然后准备上传

//如果是Windows情况下，格式是D:\\qiniu\\test.png

String localFilePath = newURL;

//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 = file;

Auth auth = Auth.create(accessKey,secretKey);

String upToken = auth.uploadToken(bucket);

try{

Response response = uploadManager.put(localFilePath,key,upToken);

System.out.println("上传文件，状态码："+response.statusCode);

//解析上传成功的结果

DefaultPutRet putRet =newGson().fromJson(response.bodyString(),DefaultPutRet.class);

System.out.println(putRet.key);

System.out.println(putRet.hash);

System.out.println("图片外链："+"http://otjrc4xc4.bkt.clouddn.com/"+key);

}catch(QiniuException ex) {

Response r = ex.response;

System.err.println(r.toString());

try{

System.err.println(r.bodyString());

}catch(QiniuException ex2) {

//ignore

}

}

}

public  voidDeleteImgs(String fileName){

String key = fileName;

Auth auth = Auth.create(accessKey,secretKey);

BucketManager bucketManager =newBucketManager(auth,cfg);

try{

Response response=bucketManager.delete(bucket,key);

System.out.println("删除文件状态码："+response.statusCode);

}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());

}

}

}

-----------------------------------------------------------------spring中配置---------------------------------------------------------------------

-->

6.扩展思考

图片的删除怎么做

7.参考文献

https://www.qiniu.com/

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