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✨ spring-boot-demo-upload 完成

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Yangkai.Shen 5 years ago
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# spring-boot-demo-upload

> 本 demo 演示了 Spring Boot 如何实现本地文件上传以及如何上传文件至七牛云平台。前端使用 vue 和 iview 实现上传页面。

## pom.xml

```xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<artifactId>spring-boot-demo-upload</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>jar</packaging>

<name>spring-boot-demo-upload</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>com.xkcoding</groupId>
<artifactId>spring-boot-demo</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>

<dependencies>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>

<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
</dependency>

<dependency>
<groupId>com.qiniu</groupId>
<artifactId>qiniu-java-sdk</artifactId>
<version>[7.2.0, 7.2.99]</version>
</dependency>
</dependencies>

<build>
<finalName>spring-boot-demo-upload</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>
```

## UploadConfig.java

```java
/**
* <p>
* 上传配置
* </p>
*
* @package: com.xkcoding.upload.config
* @description: 上传配置
* @author: yangkai.shen
* @date: Created in 2018/10/23 14:09
* @copyright: Copyright (c) 2018
* @version: V1.0
* @modified: yangkai.shen
*/
@Configuration
@ConditionalOnClass({Servlet.class, StandardServletMultipartResolver.class, MultipartConfigElement.class})
@ConditionalOnProperty(prefix = "spring.http.multipart", name = "enabled", matchIfMissing = true)
@EnableConfigurationProperties(MultipartProperties.class)
public class UploadConfig {
@Value("${qiniu.accessKey}")
private String accessKey;

@Value("${qiniu.secretKey}")
private String secretKey;

private final MultipartProperties multipartProperties;

@Autowired
public UploadConfig(MultipartProperties multipartProperties) {
this.multipartProperties = multipartProperties;
}

/**
* 上传配置
*/
@Bean
@ConditionalOnMissingBean
public MultipartConfigElement multipartConfigElement() {
return this.multipartProperties.createMultipartConfig();
}

/**
* 注册解析器
*/
@Bean(name = DispatcherServlet.MULTIPART_RESOLVER_BEAN_NAME)
@ConditionalOnMissingBean(MultipartResolver.class)
public StandardServletMultipartResolver multipartResolver() {
StandardServletMultipartResolver multipartResolver = new StandardServletMultipartResolver();
multipartResolver.setResolveLazily(this.multipartProperties.isResolveLazily());
return multipartResolver;
}

/**
* 华东机房
*/
@Bean
public com.qiniu.storage.Configuration qiniuConfig() {
return new com.qiniu.storage.Configuration(Zone.zone0());
}

/**
* 构建一个七牛上传工具实例
*/
@Bean
public UploadManager uploadManager() {
return new UploadManager(qiniuConfig());
}

/**
* 认证信息实例
*/
@Bean
public Auth auth() {
return Auth.create(accessKey, secretKey);
}

/**
* 构建七牛空间管理实例
*/
@Bean
public BucketManager bucketManager() {
return new BucketManager(auth(), qiniuConfig());
}
}
```

## UploadController.java

```java
/**
* <p>
* 文件上传 Controller
* </p>
*
* @package: com.xkcoding.upload.controller
* @description: 文件上传 Controller
* @author: yangkai.shen
* @date: Created in 2018/11/6 16:33
* @copyright: Copyright (c) 2018
* @version: V1.0
* @modified: yangkai.shen
*/
@RestController
@Slf4j
@RequestMapping("/upload")
public class UploadController {
@Value("${spring.servlet.multipart.location}")
private String fileTempPath;

@Value("${qiniu.prefix}")
private String prefix;

private final IQiNiuService qiNiuService;

@Autowired
public UploadController(IQiNiuService qiNiuService) {
this.qiNiuService = qiNiuService;
}

@PostMapping(value = "/local", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public Dict local(@RequestParam("file") MultipartFile file) {
if (file.isEmpty()) {
return Dict.create().set("code", 400).set("message", "文件内容为空");
}
String fileName = file.getOriginalFilename();
String rawFileName = StrUtil.subBefore(fileName, ".", true);
String fileType = StrUtil.subAfter(fileName, ".", true);
String localFilePath = StrUtil.appendIfMissing(fileTempPath, "/") + rawFileName + "-" + DateUtil.current(false) + "." + fileType;
try {
file.transferTo(new File(localFilePath));
} catch (IOException e) {
log.error("【文件上传至本地】失败，绝对路径：{}", localFilePath);
return Dict.create().set("code", 500).set("message", "文件上传失败");
}

log.info("【文件上传至本地】绝对路径：{}", localFilePath);
return Dict.create().set("code", 200).set("message", "上传成功").set("data", Dict.create().set("fileName", fileName).set("filePath", localFilePath));
}

@PostMapping(value = "/yun", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public Dict yun(@RequestParam("file") MultipartFile file) {
if (file.isEmpty()) {
return Dict.create().set("code", 400).set("message", "文件内容为空");
}
String fileName = file.getOriginalFilename();
String rawFileName = StrUtil.subBefore(fileName, ".", true);
String fileType = StrUtil.subAfter(fileName, ".", true);
String localFilePath = StrUtil.appendIfMissing(fileTempPath, "/") + rawFileName + "-" + DateUtil.current(false) + "." + fileType;
try {
file.transferTo(new File(localFilePath));
Response response = qiNiuService.uploadFile(new File(localFilePath));
if (response.isOK()) {
JSONObject jsonObject = JSONUtil.parseObj(response.bodyString());

String yunFileName = jsonObject.getStr("key");
String yunFilePath = StrUtil.appendIfMissing(prefix, "/") + yunFileName;

FileUtil.del(new File(localFilePath));

log.info("【文件上传至七牛云】绝对路径：{}", yunFilePath);
return Dict.create().set("code", 200).set("message", "上传成功").set("data", Dict.create().set("fileName", yunFileName).set("filePath", yunFilePath));
} else {
log.error("【文件上传至七牛云】失败，{}", JSONUtil.toJsonStr(response));
FileUtil.del(new File(localFilePath));
return Dict.create().set("code", 500).set("message", "文件上传失败");
}
} catch (IOException e) {
log.error("【文件上传至七牛云】失败，绝对路径：{}", localFilePath);
return Dict.create().set("code", 500).set("message", "文件上传失败");
}
}
}
```

## QiNiuServiceImpl.java

```java
/**
* <p>
* 七牛云上传Service
* </p>
*
* @package: com.xkcoding.upload.service.impl
* @description: 七牛云上传Service
* @author: yangkai.shen
* @date: Created in 2018/11/6 17:22
* @copyright: Copyright (c) 2018
* @version: V1.0
* @modified: yangkai.shen
*/
@Service
@Slf4j
public class QiNiuServiceImpl implements IQiNiuService, InitializingBean {
private final UploadManager uploadManager;

private final Auth auth;

@Value("${qiniu.bucket}")
private String bucket;

private StringMap putPolicy;

@Autowired
public QiNiuServiceImpl(UploadManager uploadManager, Auth auth) {
this.uploadManager = uploadManager;
this.auth = auth;
}

/**
* 七牛云上传文件
*
* @param file 文件
* @return 七牛上传Response
* @throws QiniuException 七牛异常
*/
@Override
public Response uploadFile(File file) throws QiniuException {
Response response = this.uploadManager.put(file, file.getName(), getUploadToken());
int retry = 0;
while (response.needRetry() && retry < 3) {
response = this.uploadManager.put(file, file.getName(), getUploadToken());
retry++;
}
return response;
}

@Override
public void afterPropertiesSet() {
this.putPolicy = new StringMap();
putPolicy.put("returnBody", "{\"key\":\"$(key)\",\"hash\":\"$(etag)\",\"bucket\":\"$(bucket)\",\"width\":$(imageInfo.width), \"height\":${imageInfo.height}}");
}

/**
* 获取上传凭证
*
* @return 上传凭证
*/
private String getUploadToken() {
return this.auth.uploadToken(bucket, null, 3600, putPolicy);
}
}
```

## index.html

```html
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>spring-boot-demo-upload</title>
<!-- import Vue.js -->
<script src="https://cdn.bootcss.com/vue/2.5.17/vue.min.js"></script>
<!-- import stylesheet -->
<link href="https://cdn.bootcss.com/iview/3.1.4/styles/iview.css" rel="stylesheet">
<!-- import iView -->
<script src="https://cdn.bootcss.com/iview/3.1.4/iview.min.js"></script>
</head>
<body>
<div id="app">
<Row :gutter="16" style="background:#eee;padding:10%">
<i-col span="12">
<Card style="height: 300px">
<p slot="title">
<Icon type="ios-cloud-upload"></Icon>
本地上传
</p>
<div style="text-align: center;">
<Upload
:before-upload="handleLocalUpload"
action="/demo/upload/local"
ref="localUploadRef"
:on-success="handleLocalSuccess"
:on-error="handleLocalError"
>
<i-button icon="ios-cloud-upload-outline">选择文件</i-button>
</Upload>
<i-button
type="primary"
@click="localUpload"
:loading="local.loadingStatus"
:disabled="!local.file">
{{ local.loadingStatus ? '本地文件上传中' : '本地上传' }}
</i-button>
</div>
<div>
<div v-if="local.log.status != 0">状态：{{local.log.message}}</div>
<div v-if="local.log.status === 200">文件名：{{local.log.fileName}}</div>
<div v-if="local.log.status === 200">文件路径：{{local.log.filePath}}</div>
</div>
</Card>
</i-col>
<i-col span="12">
<Card style="height: 300px;">
<p slot="title">
<Icon type="md-cloud-upload"></Icon>
七牛云上传
</p>
<div style="text-align: center;">
<Upload
:before-upload="handleYunUpload"
action="/demo/upload/yun"
ref="yunUploadRef"
:on-success="handleYunSuccess"
:on-error="handleYunError"
>
<i-button icon="ios-cloud-upload-outline">选择文件</i-button>
</Upload>
<i-button
type="primary"
@click="yunUpload"
:loading="yun.loadingStatus"
:disabled="!yun.file">
{{ yun.loadingStatus ? '七牛云文件上传中' : '七牛云上传' }}
</i-button>
</div>
<div>
<div v-if="yun.log.status != 0">状态：{{yun.log.message}}</div>
<div v-if="yun.log.status === 200">文件名：{{yun.log.fileName}}</div>
<div v-if="yun.log.status === 200">文件路径：{{yun.log.filePath}}</div>
</div>
</Card>
</i-col>
</Row>
</div>
<script>
new Vue({
el: '#app',
data: {
local: {
// 选择文件后，将 beforeUpload 返回的 file 保存在这里，后面会用到
file: null,
// 标记上传状态
loadingStatus: false,
log: {
status: 0,
message: "",
fileName: "",
filePath: ""
}
},
yun: {
// 选择文件后，将 beforeUpload 返回的 file 保存在这里，后面会用到
file: null,
// 标记上传状态
loadingStatus: false,
log: {
status: 0,
message: "",
fileName: "",
filePath: ""
}
}
},
methods: {
// beforeUpload 在返回 false 或 Promise 时，会停止自动上传，这里我们将选择好的文件 file 保存在 data里，并 return false
handleLocalUpload(file) {
this.local.file = file;
return false;
},
// 这里是手动上传，通过 $refs 获取到 Upload 实例，然后调用私有方法 .post()，把保存在 data 里的 file 上传。
// iView 的 Upload 组件在调用 .post() 方法时，就会继续上传了。
localUpload() {
this.local.loadingStatus = true; // 标记上传状态
this.$refs.localUploadRef.post(this.local.file);
},
// 上传成功后，清空 data 里的 file，并修改上传状态
handleLocalSuccess(response) {
this.local.file = null;
this.local.loadingStatus = false;
if (response.code === 200) {
this.$Message.success(response.message);
this.local.log.status = response.code;
this.local.log.message = response.message;
this.local.log.fileName = response.data.fileName;
this.local.log.filePath = response.data.filePath;
this.$refs.localUploadRef.clearFiles();
} else {
this.$Message.error(response.message);
this.local.log.status = response.code;
this.local.log.message = response.message;
}
},
// 上传失败后，清空 data 里的 file，并修改上传状态
handleLocalError() {
this.local.file = null;
this.local.loadingStatus = false;
this.$Message.error('上传失败');
},
// beforeUpload 在返回 false 或 Promise 时，会停止自动上传，这里我们将选择好的文件 file 保存在 data里，并 return false
handleYunUpload(file) {
this.yun.file = file;
return false;
},
// 这里是手动上传，通过 $refs 获取到 Upload 实例，然后调用私有方法 .post()，把保存在 data 里的 file 上传。
// iView 的 Upload 组件在调用 .post() 方法时，就会继续上传了。
yunUpload() {
this.yun.loadingStatus = true; // 标记上传状态
this.$refs.yunUploadRef.post(this.yun.file);
},
// 上传成功后，清空 data 里的 file，并修改上传状态
handleYunSuccess(response) {
this.yun.file = null;
this.yun.loadingStatus = false;
if (response.code === 200) {
this.$Message.success(response.message);
this.yun.log.status = response.code;
this.yun.log.message = response.message;
this.yun.log.fileName = response.data.fileName;
this.yun.log.filePath = response.data.filePath;
this.$refs.yunUploadRef.clearFiles();
} else {
this.$Message.error(response.message);
this.yun.log.status = response.code;
this.yun.log.message = response.message;
}
},
// 上传失败后，清空 data 里的 file，并修改上传状态
handleYunError() {
this.yun.file = null;
this.yun.loadingStatus = false;
this.$Message.error('上传失败');
}
}
})
</script>
</body>
</html>
```

## 参考

1. Spring 官方文档：https://docs.spring.io/spring-boot/docs/2.1.0.RELEASE/reference/htmlsingle/#howto-multipart-file-upload-configuration
2. 七牛云官方文档：https://developer.qiniu.com/kodo/sdk/1239/java#5


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