腾讯云图片上传
示例环境:JDK8+MAVEN3+SSM(Spring+SpringMVC+MyBatis Plus或者MyBatis) 现在比较流行的除了分布式或微服务就是动静分离。 动静分离,以nginx集群为例,nginx通常加载静态资源(js,img,css等)效率相对tomcat等应用服务器效率是非常高的,由其专门处理静态资源,而动态资源,通常由tomcat等应用服务器来处理,应用服务器处理动态资源的效率比nginx处理静态资源效率又要高很多很多。就将它们做一个分工。利于静态资源处理就使用nginx,利于动态资源处理使用tomcat或者其他应用服务器等。这样分离的好处,各自发挥其优势,即利于资源充分利用,又利于系统性能。 传统的图片服务器ftp,就现在而言已经没几个人在用了,当然了,wordpress相关的插件安装和主题下载就用到ftp。 当然了,还有不少企业将上传文件(包含图片等)放入线上tomcat某个文件夹下或者项目里面,这样的弊端使项目会越来越庞大,之前庞大是因为不断增长的需求,代码不得不越多,因此也会扩充容量。 不过目前很多企业通常采用比如腾讯云、阿里云、七牛云等对象存储,作为图片存储。 一、导入依赖 <!-- 腾讯云 -->
<dependency>
<groupId>com.qcloud</groupId>
<artifactId>cos_api</artifactId>
<version>5.2.4</version>
</dependency>
? 二、编写工具类 package com.custome; import com.qcloud.cos.COSClient; com.qcloud.cos.ClientConfig; com.qcloud.cos.auth.BasicCOSCredentials; com.qcloud.cos.auth.COSCredentials; com.qcloud.cos.model.ObjectMetadata; com.qcloud.cos.model.PutObjectResult; com.qcloud.cos.region.Region; org.springframework.web.multipart.MultipartFile; import java.io.*; java.net.URL; java.util.Date; java.util.Random; public class COSClientUtil { //todo 这些变量信息自行到 腾讯云对象存储控制台 获取 private COSClient cOSClient; private static final String ENDPOINT = "test.com"; 用户可以指定域名,不指定则为默认生成的域名 secretId final String secretId = "AKIDCJ"; secretKey final String secretKey = "CD7" 存储通名称 final String bucketName = "test";公有读私有写 1 初始化用户身份信息(secretId,secretKey) 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 static ClientConfig clientConfig = new ClientConfig(new Region("ap-beijing-1")); 3 生成cos客户端 static COSClient cosclient = COSClient(cred,clientConfig); public COSClientUtil() { cOSClient = /** * 销毁 */ void destory() { cOSClient.shutdown(); } * 上传图片 * * @param url void uploadImg2Cos(String url) throws Exception { File fileOnServer = File(url); FileInputStream fin; try { fin = FileInputStream(fileOnServer); String[] split = url.split("/"); this.uploadFile2Cos(fin,split[split.length - 1]); } catch (FileNotFoundException e) { throw new Exception("图片上传失败"); } } public String uploadFile2Cos(MultipartFile file) Exception { if (file.getSize() > 10 * 1024 * 1024) { new Exception("上传图片大小不能超过10M!"); } 图片名称 String originalFilename = file.getOriginalFilename(); System.out.println("originalFilename = " + originalFilename); 图片后缀 String substring = originalFilename.substring(originalFilename.lastIndexOf(".")).toLowerCase(); System.out.println("substring = " + substring); Random random = Random(); 生成新的图片名称(随机数0-9999+系统当前时间+上传图片名) String name = random.nextInt(10000) + System.currentTimeMillis() + "_" + substring; { InputStream inputStream = file.getInputStream(); this.uploadFile2Cos(inputStream,name); return name; } (Exception e) { * 获得图片路径 * * fileUrl * @return String getImgUrl(String fileUrl) { getUrl(fileUrl); } * 获得url链接 * * key * String 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); if (url != null url.toString(); } return ; } * 上传到COS服务器 如果同名文件会覆盖服务器上的 * * instream * 文件流 * fileName * 文件名称 包括后缀名 * @return 出错返回"",唯一MD5数字签名 String uploadFile2Cos(InputStream instream,String fileName) { String ret = ""; { 创建上传Object的Metadata ObjectMetadata objectMetadata = 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); 上传文件 PutObjectResult putResult = cOSClient.putObject(bucketName,fileName,instream,objectMetadata); ret = putResult.getETag(); } (IOException e) { e.printStackTrace(); } finally { if (instream != ) { instream.close(); } } (IOException e) { e.printStackTrace(); } } ret; } * Description: 判断Cos服务文件上传时文件的contentType * * filenameExtension 文件后缀 * String 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"; } } ? 三、编写Controller方法 @PostMapping(value="/uploadPicture",produces="application/json;charset=utf-8") JSONObject upModify(HttpServletRequest request,MultipartFile file) { JSONObject json = JSONObject(); { COSClientUtil cosClientUtil = COSClientUtil(); 获取Cookie String cookie = CookieUtils.getCookie(request,"userCode"); 解密后的userCode String decodeStr = Base64.decodeStr(cookie); if(!file.isEmpty()) { String name = cosClientUtil.uploadFile2Cos(file); 图片名称 System.out.println("name = " + name); 上传到腾讯云 String img_url = cosClientUtil.getImgUrl(name); System.out.println("img_url = " + img_url); 数据库保存图片地址 String db_img_url = img_url.substring(0,img_url.indexOf("?")); System.out.println("db_img_url = " + db_img_url); SysUser user = SysUser(); user.setUserCode(decodeStr); user.setAvatar(db_img_url); 调用修改逻辑 boolean isModifyUser = userService.updateById(user); if(isModifyUser) { json.put("returnCode","000000"); json.put("returnMsg","上传文件成功"); }else { json.put("returnCode","222221"); } } { json.put("returnCode","222222"); json.put("returnMsg","参数异常"); } } (Exception e) { e.printStackTrace(); json.put("returnCode","333333"); json.put("returnMsg","特殊异常"); } json; } ? 四、编写简单html测试 <!DOCTYPE html> <htmlheadmeta charset="UTF-8"title>上传图片测试</script type="text/javascript" src="../js/jquery-1.8.0.min.js"></script="text/javascript"> function setImg(obj){//用于进行图片上传,返回地址 var f = $(obj).val(); if(f == null ||== undefined ''){ return false; } (!/.(?:png|jpg|bmp|gif|PNG|JPG|BMP|GIF)$.test(f)) { alertLayel("类型必须是图片(.png|jpg|bmp|gif|PNG|JPG|BMP|GIF)); $(obj).val(); ; } data = new FormData(); $.each($(obj)[0].files,(i,file){ data.append('file,file); }); upload_img $(#uploadinput)[].files[]; url window.URL.createObjectURL(upload_img); $.ajax({ type: POSTuploadPicture必须false才会自动加上正确的Content-Type processData: dataType:json(data) { alert(data.returnMsg) },error: (XMLHttpRequest,textStatus,errorThrown) { alert(XMLHttpRequest.status); 状态 alert(XMLHttpRequest.readyState); 错误信息 alert(textStatus); } }); } body> input ="file" id="uploadinput" name onchange="setImg(this)"/> > ? 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