一、前端代碼
<el-upload class="step_content" drag action="string" ref="upload" :multiple="false" :http-request="createAppVersion" :data="appVersion" :auto-upload="false" :limit="1" :on-change="onFileUploadChange" :on-remove="onFileRemove"> <i class="el-icon-upload"></i> <div class="el-upload__text">將文件拖到此處，或<em>點(diǎn)擊上傳</em></div></el-upload> <div class="mgt30"> <el-button v-show="createAppVisible" :disabled="createAppDisable" type="primary" class="mgt30" @click="onSubmitClick">立即創(chuàng)建 </el-button> </div>.... onSubmitClick() { this.$refs.upload.submit(); }, createAppVersion(param) { this.globalLoading = true; const formData = new FormData(); formData.append('file', param.file); formData.append('appVersion', JSON.stringify(this.appVersion)); addAppVersionApi(formData).then(res => { this.globalLoading = false; this.$message({message: '創(chuàng)建APP VERION 成功', type: 'success'}); this.uploadFinish(); }).catch(reason => { this.globalLoading = false; this.showDialog(reason); }) },說(shuō)明：
const formData = new FormData();formData.append('file', param.file);formData.append('appVersion', JSON.stringify(this.appVersion));6.addAppVersionApi 最終會(huì)調(diào)用下面的方法，其中formData就是param， 請(qǐng)求需要加header： 'Content-Type': 'multipart/form-data'
function httpPostMutipartFileAsyn(url, param) { return new Promise((resolve, reject) => { request({ url: url, headers: { 'Content-Type': 'multipart/form-data' }, method: 'post', data: param }).then(response => { if (response.data.status.code === 0) { resolve(response.data) } else { reject(response.data.status) } }).catch(response => { reject(response) }) })}二、后端代碼
1.后端controller接口
@PostMapping("/version/add") public RestResult addAppVersion(@RequestParam("appVersion") String appVersion, @RequestParam("file") MultipartFile multipartFile) { .... return new RestResult(); }三、Feign 實(shí)現(xiàn)服務(wù)間傳遞MultipartFile參數(shù)
Controller的addAppVersion（）接口，收到上傳的文件后，需要通過(guò)Http調(diào)用遠(yuǎn)程接口，將文件上傳到資源服務(wù)。一開(kāi)始嘗試使用OKHttp 和 RestTemplate 實(shí)現(xiàn)，但是這兩種方法都必須將文件先保存，無(wú)法直接傳遞MultipartFile參數(shù)，然后才能通過(guò)OKHttp 和 RestTemplate提供的相關(guān)接口去實(shí)現(xiàn)。 本著不想在本地保存臨時(shí)文件的，找到了通過(guò)Feign解決的一種方式
1.添加如下依賴(lài)：
<dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form</artifactId> <version>3.0.3</version> </dependency> <dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form-spring</artifactId> <version>3.0.3</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.3</version> </dependency>
2.Feign 接口實(shí)現(xiàn)
@FeignClient(name = "resource-client",url = "http://xxxx",path = "resource",configuration = ResourceServiceFeignClient.MultipartSupportConfig.class)public interface ResourceServiceFeignClient { @PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE) Resource upload(@RequestPart("file") MultipartFile file); class MultipartSupportConfig { @Bean public Encoder feignFormEncoder() { return new SpringFormEncoder(); } }}這里Feign是通過(guò)url實(shí)現(xiàn)的接口調(diào)用，并沒(méi)有通過(guò)SpringCloud注冊(cè)中心服務(wù)發(fā)現(xiàn)來(lái)實(shí)現(xiàn)接口調(diào)用,因?yàn)槲宜诘捻?xiàng)目是獨(dú)立在服務(wù)化體系外的
3.將Feign接口自動(dòng)注入，正常使用就行了。
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持武林網(wǎng)。
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