上传图片失败，图片太大或格式有误

我上传图片的时候，图片可以成功保存到后台的文件夹中，但是总是提示我catch里的图片太大或格式有误，上传失败，请重新上传，且数据库没有存上图片路径。请问是哪里的代码有问题呢？

                  <el-col :span="8">
                    <el-form-item label="物资图片" prop="unit">
                      <el-upload
                          accept="image/jpeg,image/png"
                          :on-preview="handlePreview"
                          :on-remove="handleRemove"
                          :before-remove="beforeRemove"
                          ref="upload"
                          :action="'http://localhost:8989/api/uploadImage'"
                          :http-request="upload"
                          :auto-upload="false"
                          :before-upload="onBeforeUpload"
                          multiple
                          :limit="1"
                          :on-exceed="handleExceed"
                          v-model="addForm.pictures">
                        <el-button size="small" type="primary">点击上传el-button>
                        <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过1Mdiv>
                      el-upload>
                    el-form-item>
                  el-col>
                
 
                <el-form-item>
                  <el-button type="primary" @click="addIn">立即捐赠el-button>
                el-form-item>
 
 
methods:{
    addIn() {
      this.$refs.upload.submit();
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return;
        const {data: res} = await this.$http.post("addIn2", this.addForm);
        if (res != "success") {
          return this.$message.error("捐赠失败~");
        }
        this.$message.success("捐赠成功~");
        console.log(this.addForm);
        this.addDialogVisible = false;
      });
    },
    handleRemove(file, fileList) {
      console.log(file, fileList);
    },
    handlePreview(file) {
      console.log(file);
    },
    handleExceed(files, fileList) {
      this.$message.warning(`当前限制选择 1 个文件，本次选择了 ${files.length} 个文件，共选择了 ${files.length + fileList.length} 个文件`);
    },
    beforeRemove(file, fileList) {
      return this.$confirm(`确定移除 ${ file.name }？`);
    },
    onBeforeUpload(file)
    {
      const isIMAGE = file.type === 'image/jpeg'||'image/png';
      const isLt1M = file.size / 1024 / 1024 < 1;
 
      if (!isIMAGE) {
        this.$message.error('上传文件只能是图片格式!');
      }
      if (!isLt1M) {
        this.$message.error('上传文件大小不能超过 1MB!');
      }
      return isIMAGE && isLt1M;
    },
    upload (file) {
      const _this = this
      let formdata = new FormData()
 
      // 上传图片并转成Base64编码
      formdata.append('files', file.file)
      console.log(formdata)
      _this.$http.post('/api/uploadImage', formdata).then((resp) => {
        if (resp.status === 200) {
          console.log(resp.data)
          this.addForm.pictures = resp.data;
          // 设置图片回显
          _this.form.logo = resp.data
          _this.$message({type: 'success', message: '图片上传成功！'})
        }
      }).catch(() => {
        this.$message({type: 'info', message: '图片太大或格式有误，上传失败，请重新上传！'})
      })
    }
  }
}
 
 @RequestMapping(value = "/api/uploadImage", method = RequestMethod.POST)
    @ResponseBody
    public String uploadImage(@RequestParam("files") MultipartFile file) throws IOException {
        System.out.println(file.getOriginalFilename() + "图片已传入!!");
        byte[] b = file.getBytes();
        String fileName = file.getOriginalFilename();
        Path path = Paths.get("src/main/resources/pictures/" + fileName);
        Files.write(path, b);
        String receivePath = path.toString();
        return receivePath;
 
    }
 

在控制台network看看这个接口/api/uploadImage是否正常通过

把你的onBeforeUpload方法中的判断条件更改为：

const isIMAGE = file.type === 'image/jpeg' || file.type === 'image/png';

if (!isIMAGE) {
  this.$message.error('上传文件只能是图片格式!');
  return false;
}
if (!isLt1M) {
  this.$message.error('上传文件大小不能超过 1MB!');
  return false;
}
return true;

试试