使用七牛云进行对象存储

1.maven依赖

<!--七牛-->
<dependency>
    <groupId>com.qiniu</groupId>
    <artifactId>qiniu-java-sdk</artifactId>
    <version>7.2.8</version>
</dependency>
<dependency>
    <groupId>commons-fileupload</groupId>
    <artifactId>commons-fileupload</artifactId>
    <version>1.3.1</version>
</dependency>
<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.5</version>
</dependency>

2.config.properties配置文件中配置七牛云的信息：

qiniu.ak=BJSh2yr7jNedBVryDw6mZ-a9frqfp_LRUD2U1T
qiniu.sk=MgKmnIrj9arez2ZQMMrz2H0us4GFbq4a1gnFaaqQ
qiniu.buket=java25

3.SpringMVC的配置文件xxx-servlet中配置文件上传解析器

前端form表单添加enctype="multipart/form-data"属性：

image.png

后端Controller：

image.png

4.业务层读取七牛云的配置文件信息：

@Value("${qiniu.ak}")
private String qiniuAk;
@Value("${qiniu.sk}")
private String qiniuSk;
@Value("${qiniu.buket}")
private String qiniuBuket;

将图片上传到七牛云：

    @Transactional
    public void saveProduct(Product product, InputStream inputStream) {
        //上传文件到七牛云
        Configuration configuration = new Configuration(Zone.zone1());
        UploadManager uploadManager = new UploadManager(configuration);
        Auth auth = Auth.create(qiniuAk,qiniuSk);
        String uploadToken = auth.uploadToken(qiniuBuket);
        String key = null;
        try {
        Response response = uploadManager.put(IOUtils.toByteArray(inputStream),null,uploadToken);
        DefaultPutRet defaultPutRet = new Gson().fromJson(response.bodyString(),DefaultPutRet.class);
            key = defaultPutRet.key;
        } catch (IOException e) {
            throw new RuntimeException("上传文件到七牛异常",e);
        }
        //保存对象
        product.setProductImg(key);
        productMapper.insertSelective(product);
    }

5.在前端页面使用img标签来显示图片：

<img src="http://ozp5bpxi8.bkt.clouddn.com/${product.productImg}?imageView2/1/w/200/h/200" >