springboot最全文件上传步骤,详细,ajax文件上传,formdata封装

话不多说上代码

jsp页面:

<form id="updateForm" enctype="multipart/form-data">
    <input type="hidden" name="uId">
    <div class="form-group">
        <label class="control-label">商品名称:</label>
        <input type="text" name="pName" class="form-control">
    </div>
    <div class="form-group">
        <label class="control-label">库存:</label>
        <input type="text" name="pStock" class="form-control">
    </div>
    <div class="form-group">
        <label class="control-label">成本价:</label>
        <input type="text" name="pCost" class="form-control">
    </div>
    <div class="form-group">
        <label class="control-label">商品价格:</label>
        <input type="text" name="pPrice" class="form-control">
    </div>
    <div class="form-group">
        <label class="control-label">商品描述:</label>
        <input type="text" name="pDescription" class="form-control">
    </div>
    <div class="form-group">
        <label class="control-label">商品图片:</label>
        <img width="250" height="150" src=‘<c:url value="/static/probimg/222.png"></c:url>‘>
        <input type="file" name="pPicture" class="form-control">
    </div>
</form>

js代码:

$("#confirmAdd").click(function () {
    var formdata = new FormData($("#addForm")[0]);
    $.ajax({
        type:"POST",
        dataType:"json",
        url:"addProduct",
        data:formdata,
        async:false,
        cache:false,
        contentType:false,
        processData:false,
        success:function(msg){
            if(msg){
                alert("文件上传")
            }
        }
    })
})

控制层代码:思路(将上传的文件存储在本地的盘符,但是当要将本地文件如何映射到jsp页面呢??)

@RequestMapping("addProduct")
@ResponseBody
public Boolean addProduct(HttpServletRequest request, String pName, Integer pStock,
                          BigDecimal pCost, BigDecimal pPrice, String pDescription,@RequestParam("pPicture") MultipartFile pPicture) throws IOException {
    String fileName = UUID.randomUUID()+ pPicture.getOriginalFilename();
    if(!pPicture.isEmpty()){
        byte [] bytes = pPicture.getBytes();
        BufferedOutputStream bufferedOutputStream = new
                BufferedOutputStream(new FileOutputStream(new File("E:\\upload\\"+fileName)));
        bufferedOutputStream.write(bytes);
        bufferedOutputStream.close();
    }
    Product product = new Product( null,  pName,  pStock,  pCost,  pPrice,  pDescription,  fileName);
    return productService.add(product);
}

但是当要将本地文件如何映射到jsp页面呢??

package com.mall.han.utils;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
public class WebAppConfigurer extends WebMvcConfigurerAdapter {
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/probimg/**").addResourceLocations("file:E://upload/");
    }
}

 这个文件不需要放东西,然后重启服务器,在浏览器下输入该目录会显示本地的文件

原文地址：https://www.cnblogs.com/han-guang-xue/p/9988157.html