vue+springboot图片上传和显示的示例代码

一、前言

在使用spring boot做后台系统，vue做前端系统，给客户开发一套系统时候，其中用到了图片上传和显示的功能。

二、环境

• 前端：vue
• 前端组件：tinymce
• 后台：spring boot:2.2.3

三、正文

在客户开发一套门户管理系统时，集成了tinymce组件，用于编辑内容，springboot不同于其他项目。 
是集成tomcat的，文件和图片是不能直接访问的。所以我在做集成富文本编辑器时，需要处理图片的问题。
这个问题跟上传头像等显示图片的功能是类似的。下面记录详情步骤代码。

第一步：集成tinymce组件

<!--引入tinymce组件-->
import Tinymce from '@/components/Tinymce'

<!--启用tinymce组件-->
<el-form-item>
 <el-button type="primary" :loading="btnLoading" @click="onSubmit" >保 存</el-button>
</el-form-item>

<!--核心代码-->
<template>
 <div class="page-container">
  <div class="page-title-section">

  </div>
  <div class="page-content-section">
   <div class="page-content-form">
    <el-form ref="dataForm" :model="formData" :rules="formRules" label-width="180px">

     <el-form-item>
      <div>
       <tinymce v-model="formData.content" :height="300" />
      </div>
     </el-form-item>
     <el-form-item>
      <el-button type="primary" :loading="btnLoading" @click="onSubmit" >保 存</el-button>
     </el-form-item>
    </el-form>
   </div>
  </div>

 </div>
</template>
<script>

import Tinymce from '@/components/Tinymce'

export default {
 name:"contentEdit",
 components: {Tinymce},
 data(){
  return{

   formData:{
    content:'',
   },

  }
 },
 created() {

 },
 mounted() {},
 activated() {},
 deactivated() {},
 methods:{
  //表单提交
  onSubmit(){
   this.$refs['dataForm'].validate((valid) => {
    if (valid) {
     this.btnLoading = true
     this.$axios({
      url: this.formData.id == '' ? '/products/save' : '/products/edit',
      method: 'POST',
      params: this.formData
     }).then(res => {
      //处理成功回调
      const{ state,result , errmsg} = res.data
      if( state && state == 1 ){
       this.$message.success('操作成功');
       this.$router.push( {path:'/products/list'} )
      }else{
       return this.$message.error(errmsg || '操作失败');
      }

     }).finally(() => {
      this.btnLoading = false
     })
    }
   })
  },

</script>

<!--Tinymce初始化代码-->
initTinymce() {
  const _this = this
  window.tinymce.init({
  selector: `#${this.tinymceId}`,
  language: this.languageTypeList['en'],
  height: this.height,
  body_class: 'panel-body ',
  object_resizing: false,
  toolbar: this.toolbar.length > 0 ? this.toolbar : toolbar,
  menubar: this.menubar,
  plugins: plugins,
  end_container_on_empty_block: true,
  powerpaste_word_import: 'clean',
  code_dialog_height: 450,
  code_dialog_width: 1000,
  advlist_bullet_styles: 'square',
  advlist_number_styles: 'default',
  imagetools_cors_hosts: ['www.tinymce.com', 'codepen.io'],
  default_link_target: '_blank',
  link_title: false,
  nonbreaking_force_tab: true, // inserting nonbreaking space &nbsp; need Nonbreaking Space Plugin
  //上传图片回调
  images_upload_handler:(blobInfo, success, failure) => {
    var xhr, formData;

    xhr = new XMLHttpRequest();
    xhr.withCredentials = false;
    xhr.open('POST', '/api/file/imageUpload');

    xhr.onload = function () {
     var json;

     if (xhr.status !== 200) {
      failure('HTTP Error: ' + xhr.status);
      return;
     }

     json = JSON.parse(xhr.responseText);
     // console.log(json);
     json.location = util.baseURL + json.data.filename; //在该位置，如果您的后端人员返回的字段已经包含json.location信息，则该处可以省略
     if (!json || typeof json.location !== 'string') {
     failure('Invalid JSON: ' + xhr.responseText);
      return;
     }

     success(json.location);
    };

    formData = new FormData();
    formData.append('file', blobInfo.blob(), blobInfo.filename());

   xhr.send(formData);

  },
  init_instance_callback: editor => {
   if (_this.value) {
   editor.setContent(_this.value)
   }
   _this.hasInit = true
   editor.on('NodeChange Change KeyUp SetContent', () => {
   this.hasChange = true
   this.$emit('input', editor.getContent())
   })
  },
  setup(editor) {
   editor.on('FullscreenStateChanged', (e) => {
   _this.fullscreen = e.state
   })
  }
  // 整合七牛上传
  // images_dataimg_filter(img) {
  // setTimeout(() => {
  //  const $image = $(img);
  //  $image.removeAttr('width');
  //  $image.removeAttr('height');
  //  if ($image[0].height && $image[0].width) {
  //  $image.attr('data-wscntype', 'image');
  //  $image.attr('data-wscnh', $image[0].height);
  //  $image.attr('data-wscnw', $image[0].width);
  //  $image.addClass('wscnph');
  //  }
  // }, 0);
  // return img
  // },
  // images_upload_handler(blobInfo, success, failure, progress) {
  // progress(0);
  // const token = _this.$store.getters.token;
  // getToken(token).then(response => {
  //  const url = response.data.qiniu_url;
  //  const formData = new FormData();
  //  formData.append('token', response.data.qiniu_token);
  //  formData.append('key', response.data.qiniu_key);
  //  formData.append('file', blobInfo.blob(), url);
  //  upload(formData).then(() => {
  //  success(url);
  //  progress(100);
  //  })
  // }).catch(err => {
  //  failure('出现未知问题，刷新页面，或者联系程序员')
  //  console.log(err);
  // });
  // },
  })
 },
 destroyTinymce() {
  const tinymce = window.tinymce.get(this.tinymceId)
  if (this.fullscreen) {
  tinymce.execCommand('mceFullScreen')
  }

  if (tinymce) {
  tinymce.destroy()
  }
 },
 setContent(value) {
  window.tinymce.get(this.tinymceId).setContent(value)
 },
 getContent() {
  window.tinymce.get(this.tinymceId).getContent()
 },
 imageSuccessCBK(arr) {
  const _this = this
  arr.forEach(v => {
  window.tinymce.get(_this.tinymceId).insertContent(`<img class="wscnph" src="${v.url}" >`)
  })
 }
 }

第二步：后台代码

@RequestMapping(value = "/imageUpload", method = RequestMethod.POST)
 public void imageUpload(@RequestParam("file") MultipartFile file, HttpServletRequest request, HttpServletResponse response) {
  try {
   logger.info("上传图片名 :" + file.getOriginalFilename());

   if (!file.isEmpty()) {
//    Properties p = new Properties();// 属性集合对象
//    String path = RedisUtil.class.getClassLoader().getResource("").getPath()+"global.properties";
//    FileInputStream fis = new FileInputStream(path);// 属性文件输入流
//    p.load(fis);// 将属性文件流装载到Properties对象中
//    fis.close();// 关闭流
//    String uploadPath = p.getProperty("imgUpload.url");
//    //路径名称上加上-年/月日：yyyy/MMdd
//    uploadPath += "Uploads/"+new SimpleDateFormat("yyyy").format(new Date())+ "/" +new SimpleDateFormat("MMdd").format(new Date())+"/";

    String path= request.getServletContext().getRealPath("/");

path="/Users/qinshengfei/fsdownload";
    logger.error("path:"+path);
    //路径名称上加上-年/月日：yyyy/MMdd
    String uploadPath = File.separatorChar+"Uploads"+File.separatorChar+new SimpleDateFormat("yyyy").format(new Date())+
      File.separatorChar +new SimpleDateFormat("MMdd").format(new Date())+File.separatorChar;

    // 文件上传大小
    long fileSize = 10 * 1024 * 1024;
    //判断文件大小是否超过
    if (file.getSize() > fileSize) {
     backInfo(response, false, 2, "");
     return;
    }
    //获取上传文件名称
    String OriginalFilename = file.getOriginalFilename();
    //获取文件后缀名：如jpg
    String fileSuffix = OriginalFilename.substring(OriginalFilename.lastIndexOf(".") + 1).toLowerCase();
    if (!Arrays.asList(TypeMap.get("image").split(",")).contains(fileSuffix)) {
     backInfo(response, false, 3, "");
     return;
    }
    //判断是否有文件上传
//    if (!ServletFileUpload.isMultipartContent(request)) {
//     backInfo(response, false, -1, "");
//     return;
//    }

    // 检查上传文件的目录
    File uploadDir = new File(path+uploadPath);
    System.out.println(path+uploadPath);
    if (!uploadDir.isDirectory()) {
     if (!uploadDir.mkdirs()) {
      backInfo(response, false, 4, "");
      return;
     }
    }

    // 是否有上传的权限
    if (!uploadDir.canWrite()) {
     backInfo(response, false, 5, "");
     return;
    }

    // 新文件名-加13为随机字符串
    String newname = getRandomString(13) +"." + fileSuffix;

    File saveFile = new File(path+uploadPath, newname);

    try {
     file.transferTo(saveFile);

     backInfo(response, true, 0, uploadPath+newname);
    } catch (Exception e) {
     logger.error(e.getMessage(), e);
     backInfo(response, false, 1, "");
     return;
    }
   } else {
    backInfo(response, false, -1, "");
    return;
   }
  } catch (Exception e) {
   logger.error(e.getMessage());
  }

 }

 // 返回信息
 private void backInfo(HttpServletResponse response, boolean flag, int message, String fileName) {
  fileName=fileName.replace("\\","/");
  String json = "";
  if (flag) {
   json = "{ \"status\": \"success";
  } else {
   json = "{ \"status\": \"error";
  }
  json += "\",\"fileName\": \"http://127.0.0.1:8090/file/show?fileName=" + fileName + "\",\"message\": \"" + message + "\"}";
  try {
   response.setContentType("text/html;charset=utf-8");
   response.getWriter().write(json);
  } catch (IOException e) {
   logger.error(e.getMessage(), e);
  }
 }

第三步：后台处理显示图片

 /**
  * 显示单张图片
  * @return
  */
 @RequestMapping("/show")
 public ResponseEntity showPhotos(String fileName){

  try {
   String path = "/Users/qinshengfei/fsdownload";
   // 由于是读取本机的文件，file是一定要加上的， path是在application配置文件中的路径
   logger.error("showPhotos:"+path+fileName);
   return ResponseEntity.ok(resourceLoader.getResource("file:" + path + fileName));
  } catch (Exception e) {
   return ResponseEntity.notFound().build();
  }
 }

第四步：显示效果

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。