SpringBoot integrates Alibaba Cloud OSS file upload, download, view, and delete
Basic Information
Involving knowledge points
- Introduction to OSS and quick start to use Alibaba Cloud OSS console
- SpringBoot integrates Alibaba Cloud OSS storage services to upload, download, view, and delete files
- Introduction to Alibaba Cloud OSS documentation and quick start to use
- Getting started with lombok and IDEA lombok plug-in installation
- SpringMVC and AJAX front-end and back-end separation interaction
- AJAX file upload asynchronously
Detailed project
Preparation before development
- Development tool: IDEA
- Basic environment: Maven + JDK8
- Technology used: SpringBoot, lombok, Alibaba Cloud OSS storage service
- SpringBoot version: 2.4.5
Use Alibaba Cloud OSS
1. Create a bucket
To use OSS, you first need to create a bucket. Bucket translates to Chinese and means a bucket. The stored image resources are regarded as water. If you want to hold water, you must have a bucket.
Enter the console, https://oss.console.aliyun.com/overview
Click Create Bucket
After the creation is complete, you can see the created bucket in the bucket list, and click to view the overview of the current bucket:
2. Manage files
File management can be done online
3. Alibaba Cloud OSS document
Alibaba Cloud provides more detailed development documents for users' reference:
Project initialization
Create SpringBoot project
Maven dependency
<dependency>
<groupId>com.aliyun.oss</groupId>
<artifactId>aliyun-sdk-oss</artifactId>
<version>2.8.3</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.4</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.9.9</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.8.1</version>
</dependency>IDEA install lombok plug-in (omitted)
Back-end service writing
Alibaba Cloud OSS configuration
Create a new application-oss.properties under resource
aliyun.endpoint=oss-cn-beijing.aliyuncs.com
aliyun.accessKeyId=LTAI5t9mpendCkALZKtBcqW1
aliyun.accessKeySecret=XXX（你的accessKeySecret）
aliyun.bucketName=malf-bucket
aliyun.urlPrefix=https://malf-bucket.oss-cn-beijing.aliyuncs.com/
spring.servlet.multipart.max-file-size=100MB
spring.servlet.multipart.max-request-size=1000MBThe endpoint, bucketName, and urlPrefix can be seen on the OSS overview page;
accessKeyId and accessKeySecret need to be checked in Access Key.
Configuration class code
package com.malf.config;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClient;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
/**
* @author 巅峰小词典
* @description
* @date 2021/5/20
* @project springboot_oss
*/
@Configuration
@PropertySource(value = {"classpath:application-oss.properties"})
@ConfigurationProperties(prefix = "aliyun")
@Data
public class AliyunConfig {
private String endpoint;
private String accessKeyId;
private String accessKeySecret;
private String bucketName;
private String urlPrefix;
@Bean
public OSS oSSClient() {
return new OSSClient(endpoint, accessKeyId, accessKeySecret);
}
}Back-end business code
common
package com.malf.common;
import lombok.Data;
/**
* @author 巅峰小词典
* @description 用于前后端交互的返回值
* @date 2021/5/20
* @project springboot_oss
*/
@Data
public class FileUploadResult {
// 文件唯一标识
private String uid;
// 文件名
private String name;
// 状态有：uploading done error removed
private String status;
// 服务端响应内容，如：'{"status": "success"}'
private String response;
}service
package com.malf.service;
import com.aliyun.oss.OSS;
import com.aliyun.oss.model.ListObjectsRequest;
import com.aliyun.oss.model.OSSObject;
import com.aliyun.oss.model.OSSObjectSummary;
import com.aliyun.oss.model.ObjectListing;
import com.malf.common.FileUploadResult;
import com.malf.config.AliyunConfig;
import org.apache.commons.lang3.RandomUtils;
import org.apache.commons.lang3.StringUtils;
import org.joda.time.DateTime;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import javax.annotation.Resource;
import java.io.*;
import java.util.List;
/**
* @author 巅峰小词典
* @description 使用ossClient操作阿里云OSS，进行上传、下载、删除、查看所有文件等操作，同时可以将图片的url进行入库操作。
* @date 2021/5/20
* @project springboot_oss
*/
@Service
public class FileUploadService {
// 允许上传的格式
private static final String[] IMAGE_TYPE = new String[]{".bmp", ".jpg", ".jpeg", ".gif", ".png"};
@Resource
private OSS ossClient;
@Resource
private AliyunConfig aliyunConfig;
/**
* 文件上传
*
* @param uploadFile
* @return
*/
public FileUploadResult upload(MultipartFile uploadFile) {
// 校验图片格式
boolean isLegal = false;
for (String type : IMAGE_TYPE) {
if (StringUtils.endsWithIgnoreCase(uploadFile.getOriginalFilename(), type)) {
isLegal = true;
break;
}
}
// 封装Result对象，并且将文件的byte数组放置到result对象中
FileUploadResult fileUploadResult = new FileUploadResult();
if (!isLegal) {
fileUploadResult.setStatus("error");
return fileUploadResult;
}
// 文件新路径
String fileName = uploadFile.getOriginalFilename();
String filePath = getFilePath(fileName);
// 上传到阿里云
try {
ossClient.putObject(aliyunConfig.getBucketName(), filePath, new ByteArrayInputStream(uploadFile.getBytes()));
} catch (Exception e) {
e.printStackTrace();
// 上传失败
fileUploadResult.setStatus("error");
return fileUploadResult;
}
fileUploadResult.setStatus("done");
fileUploadResult.setResponse("success");
// 文件路径需要保存到数据库
fileUploadResult.setName(this.aliyunConfig.getUrlPrefix() + filePath);
fileUploadResult.setUid(String.valueOf(System.currentTimeMillis()));
return fileUploadResult;
}
/**
* 生成路径以及文件名
*
* @param sourceFileName
* @return
*/
private String getFilePath(String sourceFileName) {
DateTime dateTime = new DateTime();
return "images/" + dateTime.toString("yyyy") + "/" + dateTime.toString("MM") + "/"
+ dateTime.toString("dd") + "/" + System.currentTimeMillis()
+ RandomUtils.nextInt(100, 9999) + "."
+ StringUtils.substringAfterLast(sourceFileName, ".");
}
/**
* 查看文件列表
*
* @return
*/
public List<OSSObjectSummary> list() {
// 设置最大个数。
final int maxKeys = 200;
// 列举文件。
ObjectListing objectListing = ossClient.listObjects(new ListObjectsRequest(aliyunConfig.getBucketName()).withMaxKeys(maxKeys));
List<OSSObjectSummary> sums = objectListing.getObjectSummaries();
return sums;
}
/**
* 删除文件
*
* @param objectName
* @return
*/
public FileUploadResult delete(String objectName) {
// 根据BucketName,objectName删除文件
ossClient.deleteObject(aliyunConfig.getBucketName(), objectName);
FileUploadResult fileUploadResult = new FileUploadResult();
fileUploadResult.setName(objectName);
fileUploadResult.setStatus("removed");
fileUploadResult.setResponse("success");
return fileUploadResult;
}
/**
* 下载文件
*
* @param os
* @param objectName
* @throws IOException
*/
public void exportOssFile(OutputStream os, String objectName) throws IOException {
// ossObject包含文件所在的存储空间名称、文件名称、文件元信息以及一个输入流。
OSSObject ossObject = ossClient.getObject(aliyunConfig.getBucketName(), objectName);
// 读取文件内容。
BufferedInputStream in = new BufferedInputStream(ossObject.getObjectContent());
BufferedOutputStream out = new BufferedOutputStream(os);
byte[] buffer = new byte[1024];
int lenght = 0;
while ((lenght = in.read(buffer)) != -1) {
out.write(buffer, 0, lenght);
}
if (out != null) {
out.flush();
out.close();
}
if (in != null) {
in.close();
}
}
}controller
package com.malf.controller;
import com.aliyun.oss.model.OSSObjectSummary;
import com.malf.common.FileUploadResult;
import com.malf.service.FileUploadService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
/**
* @author 巅峰小词典
* @description
* @date 2021/5/20
* @project springboot_oss
*/
@Controller
public class FileUploadController {
@Resource
private FileUploadService fileUploadService;
@RequestMapping("file/upload")
@ResponseBody
public FileUploadResult upload(@RequestParam("file") MultipartFile uploadFile) throws Exception {
return this.fileUploadService.upload(uploadFile);
}
@RequestMapping("file/delete")
@ResponseBody
public FileUploadResult delete(@RequestParam("fileName") String objectName) throws Exception {
return this.fileUploadService.delete(objectName);
}
@RequestMapping("file/list")
@ResponseBody
public List<OSSObjectSummary> list() throws Exception {
return this.fileUploadService.list();
}
@RequestMapping("file/download")
@ResponseBody
public void download(@RequestParam("fileName") String objectName, HttpServletResponse response) throws IOException {
// 浏览器以附件形式下载
response.setHeader("Content-Disposition", "attachment;filename=" + new String(objectName.getBytes(), "ISO-8859-1"));
this.fileUploadService.exportOssFile(response.getOutputStream(), objectName);
}
}Front-end page writing and testing
File upload page upload.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>oss文件上传</title>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
function uploadfile() {
$("#fileTypeError").html('');
// 获得文件名称
var fileName = $('#file_upload').val();
// 截取文件类型,如(.jpg)
var fileType = fileName.substr(fileName.length - 4, fileName.length);
// 验证文件类型,此处验证也可使用正则
if (fileType == '.bmp' || fileType == '.jpg' || fileType == '.jpeg' || fileType == '.gif' || fileType == '.png') {
$.ajax({
url: 'file/upload',// 上传地址
type: 'POST',
cache: false,
data: new FormData($('#uploadForm')[0]),// 表单数据
processData: false,
contentType: false,
success: function (rtn) {
if (rtn.status == 'error') {
$("#fileTypeError").html('*上传文件类型错误,支持类型: .bmp .jpg .jpeg .gif .png'); // 根据后端返回值,回显错误信息
} else {
$('div').append('<img src="' + rtn.name + '" style="width: 300px;height: 300px"></img>')
}
}
});
} else {
$("#fileTypeError").html('*上传文件类型错误,支持类型: .bmp .jpg .jpeg .gif .png');
}
}
</script>
</head>
<body>
<form id="uploadForm" enctype="multipart/form-data"> <!-- 声明文件上传 -->
<input id="file_upload" type="file" name="file"/> <!-- 定义change事件,选择文件后触发 -->
<br/><span style="color: red" id="fileTypeError"></span> <!-- 文件类型错误回显,此处通过前后端两次验证文件类型 -->
<br/><input type="button" onclick="uploadfile()" value="上传">
</form>
<div></div>
</body>
</html>Show results:
File management page manager.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>oss文件管理</title>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
var pre = 'https://malf-bucket.oss-cn-beijing.aliyuncs.com/';
$(function () {
listfile();
});
// 文件列表
function listfile() {
$.ajax({
url: "http://localhost:8080/file/list",
type: 'POST',
success: function (rtn) {
console.log(rtn.length);
for (var i = 0; i < rtn.length; i++) {
$('div').append('<img src="' + pre + rtn[i].key + '" style="width: 300px;height: 300px; padding: 10px" ondblclick="deletefile(this.src)" onclick="downloadfile(this.src)"></img>')
}
}
});
}
// 文件下载
function downloadfile(src) {
var fileName = src.split(pre)[1];
window.location.href = "http://localhost:8080/file/download?fileName=" + fileName;
}
// 文件删除
function deletefile(src) {
var fileName = src.split(pre)[1];
var param = {fileName: fileName};
$.ajax({
url: "http://localhost:8080/file/delete",
data: param,
success: function () {
alert('删除成功', fileName);
// 删除页面
location.reload();
}
});
}
</script>
</head>
<body>
单击下载oss上的图片、双击删除oss上的图片<br>
<div>
</div>
</body>
</html>Show results:
After the test is successful, SpringBoot integrates the basic framework of Alibaba Cloud OSS file upload, download, view, and deletion to build successfully.
java
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