表达式语言—通常用于表单输入字段名称和JSP标记。
Expression language - Normally used in form input field names and JSP tags.
第二，您需要通过使用HTML LABEL标记使所有的表单输入域和它们的标签关联。
Second, you need to associate all of your form input fields with their labels using the HTML label tag.
一旦用户选择了要上传的文件，将标题和可选标记输入此表单并提交后，脚本的另一半就会发挥作用。
Once the user selects an image file for upload, enters a title and optional tags into this form and submits it, the second half of the script swings into action.
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