我个人博客系统上传特色图片功能就是用layui上传文件组件做的。
另外采用某个生态框架，尽量都统一用该生态框架对应的解决方案，因为这样一来，有这么几个好处?
1.统一而不杂糅,有利于制定相应的编码规范，方便维护;
2.复用性高;
3.不会因公司开发人员的离职而导致一时找不到人来做这件事情;
就这三点，也足以让企业降低相应的开发成本
前端代码实现:
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| <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>upload</title>
<link rel="stylesheet" href="../layui/css/layui.css" media="all">
</head>
<body>
<button type="button" class="layui-btn" id="uploadExample">
<i class="layui-icon"></i>上传安装包或更新包
</button>
<script src="../layui/layui.js"></script>
<script>
layui.use('upload', function(){
var upload = layui.upload;
//执行实例
var uploadInst = upload.render({
elem: '#uploadExample' //绑定元素
,url: 'http://localhost:8090/blog-web/user/uploadFile' //上传接口
,accept: 'file'
,done: function(res){
layui.use('layer', function(){
var layer = layui.layer;
layer.msg(res.url, {
time: 6000, //6s后自动关闭
icon:1
});
});
}
,error: function(){
//请求异常回调
}
});
});
</script>
</body>
</html>
|
后端代码(我在这里采用的是腾讯云对象存储):
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| @PostMapping(value = "/uploadFile")
@ApiOperation("上传文件")
public JSONObject uploadFile(HttpServletRequest request) throws IOException {
JSONObject json = new JSONObject();
try {
COSClientUtil cosClientUtil = new COSClientUtil();
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
// 获取上传的文件
MultipartFile multiFile = multipartRequest.getFile("file");
String name = cosClientUtil.uploadFileCos(multiFile);
// 文件名称
logger.info("name = " + name);
// 获取文件路径
String fileUrl = cosClientUtil.getFileUrl(name);
logger.info("fileUrl = " + fileUrl);
// 对文件路径进行处理
String dbFileUrl = fileUrl.substring(0, fileUrl.indexOf("?"));
logger.info("dbFileUrl = " + dbFileUrl);
json.put("url", dbFileUrl);
json.put(CommonEnum.RETURN_CODE, "000000");
json.put(CommonEnum.RETURN_MSG, "success");
} catch (Exception e) {
e.printStackTrace();
json.put(CommonEnum.RETURN_CODE, "333333");
json.put(CommonEnum.RETURN_MSG, "特殊异常");
}
return json;
}
|
通用腾讯云对象存储工具类:
对于腾讯云对象存储不明白的，可以参考官方文档:
https://cloud.tencent.com/document/product/436/6474
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|
import com.qcloud.cos.COSClient;
import com.qcloud.cos.ClientConfig;
import com.qcloud.cos.auth.BasicCOSCredentials;
import com.qcloud.cos.auth.COSCredentials;
import com.qcloud.cos.http.HttpMethodName;
import com.qcloud.cos.model.GetObjectRequest;
import com.qcloud.cos.model.ObjectMetadata;
import com.qcloud.cos.model.PutObjectRequest;
import com.qcloud.cos.model.PutObjectResult;
import com.qcloud.cos.region.Region;
import org.apache.http.ProtocolException;
import org.springframework.web.multipart.MultipartFile;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Date;
import java.util.Random;
public class COSClientUtil {
private COSClient cOSClient;
private static final String ENDPOINT = "ENDPOINT"; //用户可以指定域名，不指定则为默认生成的域名
//secretId
private static final String secretId = "secretId";
//secretKey
private static final String secretKey = "secretKey";
//存储桶名称
private static final String bucketName = "bucketName";//公有读私有写
//APPID
private static final String APPID = "APPID";
// 1 初始化用户身份信息(secretId, secretKey)
private static COSCredentials cred = new BasicCOSCredentials(secretId, secretKey);
// 2 设置bucket的区域, COS地域的简称请参照 https://cloud.tencent.com/document/product/436/6224
private static ClientConfig clientConfig = new ClientConfig(new Region("ap-beijing-1"));
// 3 生成cos客户端
private static COSClient cosclient = new COSClient(cred, clientConfig);
public COSClientUtil() {
cOSClient = new COSClient(cred, clientConfig);
}
public static String getSecretId() {
return secretId;
}
public static String getsecretKey() {
return secretKey;
}
public static String getBucketName() {
return bucketName;
}
public static String getAPPID() {
return APPID;
}
/**
* 销毁
*/
public void destory() {
cOSClient.shutdown();
}
/**
* 上传文件
* @param file
* @return
*/
public String uploadFileCos(MultipartFile file) {
String originalFilename = file.getOriginalFilename();
try {
InputStream inputStream = file.getInputStream();
this.uploadFileCos(inputStream, originalFilename);
} catch (Exception e) {
e.printStackTrace();
}
return originalFilename;
}
/**
* 上传文件
* @param instream
* @param fileName
* @return
*/
public String uploadFileCos(InputStream instream, String fileName) {
String ret = "";
try {
// 创建上传Object的Metadata
ObjectMetadata objectMetadata = new ObjectMetadata();
objectMetadata.setContentLength(instream.available());
objectMetadata.setCacheControl("no-cache");
objectMetadata.setHeader("Pragma", "no-cache");
objectMetadata.setContentType(getcontentType(fileName.substring(fileName.lastIndexOf("."))));
objectMetadata.setContentDisposition("inline;filename=" + fileName);
PutObjectResult putResult = cOSClient.putObject(bucketName,fileName, instream, objectMetadata);
ret = putResult.getETag();
System.out.println(ret);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (instream != null) {
instream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
cosclient.shutdown();
}
return ret;
}
/**
* 获得文件路径 在上传文件之前获取预签名链接用的。
*
* @param fileUrl
* @return
*/
public String getFileUrl(String fileUrl) {
return getUrl(fileUrl).toString();
}
/**
* 生成预签名的上传链接
*
* @param key
* @return
*/
public URL getUrl(String key) {
// 设置URL过期时间为10年 3600l* 1000*24*365*10
Date expiration = new Date(System.currentTimeMillis() + 3600L * 1000 * 24 * 365 * 10);
// 生成URL
URL url = cOSClient.generatePresignedUrl(bucketName, key, expiration, HttpMethodName.PUT);
return url;
}
/**
* Description: 判断Cos服务文件上传时文件的contentType
*
* @param filenameExtension 文件后缀
* @return String
*/
public static String getcontentType(String filenameExtension) {
if (filenameExtension.equalsIgnoreCase("bmp")) {
return "image/bmp";
}
if (filenameExtension.equalsIgnoreCase("gif")) {
return "image/gif";
}
if (filenameExtension.equalsIgnoreCase("jpeg") || filenameExtension.equalsIgnoreCase("jpg")
|| filenameExtension.equalsIgnoreCase("png")) {
return "image/jpeg";
}
if (filenameExtension.equalsIgnoreCase("html")) {
return "text/html";
}
if (filenameExtension.equalsIgnoreCase("txt")) {
return "text/plain";
}
if (filenameExtension.equalsIgnoreCase("vsd")) {
return "application/vnd.visio";
}
if (filenameExtension.equalsIgnoreCase("pptx") || filenameExtension.equalsIgnoreCase("ppt")) {
return "application/vnd.ms-powerpoint";
}
if (filenameExtension.equalsIgnoreCase("docx") || filenameExtension.equalsIgnoreCase("doc")) {
return "application/msword";
}
if (filenameExtension.equalsIgnoreCase("xml")) {
return "text/xml";
}
return "image/jpeg";
}
/**
* 下载文件
* @param downFile
* @param key
* @param bucketName
*/
public void download(File downFile, String key, String bucketName) {
GetObjectRequest getObjectRequest = new GetObjectRequest(bucketName, key);
ObjectMetadata downObjectMeta = cOSClient.getObject(getObjectRequest, downFile);
System.out.println(downObjectMeta.getContentLength());
}
}
|
