axios+springboot上传图片到本地（vue）

结果：

前端文件：

<template>

<div>

<input type="file" id="file" ref="file" v-on:change="handleFileUpload()"/>

<button @click="submitFile">上传</button>

</div>

</template>

<script>

import axios from 'axios';

export default {

data(){

return {

file: ''

}

},

methods: {

submitFile(){

let formData = new FormData();

formData.append('file', this.file);

axios.post( 'http://localhost:8080/upload/photos',

formData,

{

headers: {

'Content-Type': 'multipart/form-data'

}

}

).then(function(){

console.log('SUCCESS!!');

})

.catch(function(){

console.log('FAILURE!!');

});

},

handleFileUpload(){

this.file = this.$refs.file.files[0];

}

}

}

</script>

<style scoped>

.btn_pos{

margin-top: 0px;

}

</style>

后端代码：

复制代码

@CrossOrigin
@RestController
@RequestMapping("/upload")
public class ImageController {

复制代码

private final String UPLOAD_PATH = "D:/Download/";//写上你需要上传的本地路径（模拟服务器）

@PostMapping("/photos")
public ResponseEntity<String> uploadFile(@RequestParam MultipartFile file) {
    // ... File upload logic ...
    if (file.isEmpty()) {
        System.out.println("文件为空");
        return new ResponseEntity<>("文件不能为空", HttpStatus.BAD_REQUEST);
    }
    try {
        byte[] bytes = file.getBytes();
        Path path = Paths.get(UPLOAD_PATH + File.separator + file.getOriginalFilename());
        System.out.println("path: " + path);
        Files.write(path, bytes);
        return new ResponseEntity<>("文件上传成功", HttpStatus.OK);
    } catch (IOException e) {
        e.printStackTrace();
        return new ResponseEntity<>("文件上传失败", HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

另一种方式：HTTP请求

使用elementplus组件<el-upload>：

<template>

<div>

<el-upload

drag

action="http://localhost:8080/upload/photos"

:on-success="handleUploadSuccess"

:on-error="handleUploadError"

>

<i class="el-icon-upload"></i>

<div class="el-upload__text">拖拽文件到此处上传</div>

</el-upload>

</div>

</template>

<script>

export default {

methods: {

handleUploadSuccess(response, file) {

this.$message.success('文件上传成功');

},

handleUploadError(err, file) {

this.$message.error('文件上传失败');

}

}

};

</script>

后端代码与前面一样。