Java enables images and text to be submitted to the form at the same time

First look at the following effect picture:

Form code:

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<form action="/addPro" method="post" enctype="multipart/form-data">
    <a>宠物（或产品）类型：</a><select id="categoryID" name="cid"></select><br/><br/>
    <a>宠物（或产品）名字：</a><input type="text" name="cname"><br/><br/>
    <a>一句话介绍：</a><input type="text" name="introduction"><br/><br/>
    <a>题目：</a><input type="text" name="title"><br/><br/>
    <a>价钱：</a><input type="text" name="price"><br/><br/>
    <a>库存：</a><input type="text" name="stock"><br/><br/>
    <a>状态：</a><select name="status">
        <option value="1">在售</option>
        <option value="2">下架</option>
        <option value="3">删除</option>
    </select><br/><br/>
    <a>头像设置:</a><input type="file" οnchange="previewFile()" name="fileName">
    <br/>
    <img src="${data.image}" alt="Image preview"/><br/>
    <a>详细描述(编辑完需要在文本框右上角点保存)：</a><br/>
    <div id="editor">
        <p>商品详细描述</p>
        <p>编辑完需要在文本框右上角点保存</p>
    </div><input type="hidden" name="details" id="detail"><br/><br/>
    <input type="submit" value="新增商品">
</form>

The submission form is submitted in binary mode, so it is generally used to upload images. When text is uploaded at the same time under this form, an error will be reported. However, the business needs to upload text and pictures of products at the same time, so the four packages of commons are used here and imported using Maven, as follows:

 <!-- https://mvnrepository.com/artifact/commons-io/commons-io有关图片文本同时上传 -->
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.3.3</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/commons-collections/commons-collections -->
    <dependency>
      <groupId>commons-collections</groupId>
      <artifactId>commons-collections</artifactId>
      <version>3.1</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/commons-beanutils/commons-beanutils -->
    <dependency>
      <groupId>commons-beanutils</groupId>
      <artifactId>commons-beanutils</artifactId>
      <version>1.9.2</version>
    </dependency>

The Java code is as follows:

Mainly judge each For attributes of a parameter, image processing is performed for images, and text processing is performed for text.

//新增产品
	@RequestMapping("/addPro")
	public void addPro(HttpServletRequest request, HttpServletResponse response) throws IOException {
		//编码规范
		response.setContentType("text/html");
//		response.setCharacterEncoding("utf-8");
		Product product = new Product();
 
		//这种方法主要通过if (item.isFormField())这个条件判别文件还是非文件
		DiskFileItemFactory factory = new DiskFileItemFactory();
		ServletFileUpload upload = new ServletFileUpload(factory);
		List items = null;
		try {
			items = upload.parseRequest(request);
		} catch (FileUploadException e) {
			e.printStackTrace();
		} // 解析request请求
		Iterator iter = items.iterator();// 遍历表单中提交过来的内容
		while (iter.hasNext()) {
			FileItem item = (FileItem) iter.next();
			if (item.isFormField()) { // 如果是表单域 ，就是非文件上传元素
				String value = item.getString("UTF-8"); // 获取value属性的值，这里需要指明UTF-8格式，否则出现中文乱码问题
				if (item.getFieldName().equals("cid")) {// 对应form中属性的名字
					int categoryId = Integer.parseInt(value);
					product.setCategory_id(categoryId);
				} else if (item.getFieldName().equals("cname")) {
					product.setName(value);
				}else if (item.getFieldName().equals("introduction")) {
					product.setIntroduction(value);
				}else if (item.getFieldName().equals("title")) {
					product.setTitle(value);
				}else if (item.getFieldName().equals("price")) {
					BigDecimal price=new BigDecimal(value);
					product.setPrice(price);
				}else if (item.getFieldName().equals("stock")) {
					product.setStock(Integer.parseInt(value));
				}else if (item.getFieldName().equals("status")) {
					product.setStatus(Integer.parseInt(value));
				}else if (item.getFieldName().equals("details")) {
					product.setDetail(value);
				}
			}else {
				String filename = item.getName(); // 文件的名字
 
				String imgname = filename.substring(0, filename.indexOf("."));  //减去“.”后面的字符
 
				//tomcat启动位置
//				String t1 = System.getProperty("user.dir").substring(0,
//						System.getProperty("user.dir").length() - 4);
 
				String path = request.getServletContext().getRealPath("img"); //target找到img位置
				Long time = Calendar.getInstance().getTimeInMillis();  //时间戳，保证文件命名不重复
				String imgurl = "./img/"+imgname+time+".jpg";
				product.setImage(imgurl);
				System.out.println(imgurl);
				File saveFile = new File(path+"/" + imgname+time+".jpg"); // 定义一个file指向一个具体的文件
				try {
					item.write(saveFile);// 把上传的内容写到一个文件中
					System.out.println("上传到"+path+"成功");
				} catch (Exception e) {
					/* e.printStackTrace(); */
					System.out.println("文件"+path+"为空");
				}
			}
		}
 
		if(productDaoService.addProduct(product)){
			PrintWriter out = response.getWriter();
			out.print("<script language=\"javascript\">alert(&#39;ADD SUCCESS&#39;);window.location.href=&#39;/admin/administrator&#39;</script>");
		}else {
			PrintWriter out = response.getWriter();
			out.print("<script language=\"javascript\">alert(&#39;增加失败&#39;);window.location.href=&#39;/admin/addProduct&#39;</script>");
		}
	}

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