基于spring的文件上传–单文件上传详解编程语言

    <bean id="multipartResolver" 
            class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 
        <property name="maxUploadSize" value="2000000"/> 
    </bean>

<form:form commandName="product" action="product_save" method="post" enctype="multipart/form-data"> 
    <fieldset> 
        <legend>Add a product</legend> 
        <p> 
            <label for="name">Product Name: </label> 
            <form:input id="name" path="name" cssErrorClass="error"/> 
            <form:errors path="name" cssClass="error"/> 
        </p> 
        <p> 
            <label for="description">Description: </label> 
            <form:input id="description" path="description"/> 
        </p> 
        <p> 
            <label for="price">Price: </label> 
            <form:input id="price" path="price" cssErrorClass="error"/> 
        </p> 
        <p> 
            <label for="image">Product Image: </label> 
            <input type="file" name="images[0]"/> 
        </p> 
        <p id="buttons"> 
            <input id="reset" type="reset" tabindex="4"> 
            <input id="submit" type="submit" tabindex="5"  
                value="Add Product"> 
        </p> 
    </fieldset> 
</form:form>

    @RequestMapping(value = "/product_input") 
    public String inputProduct(Model model) { 
        model.addAttribute("product", new Product()); 
        return "ProductForm"; 
    } 
 
    @RequestMapping(value = "/product_save") 
    public String saveProduct(HttpServletRequest servletRequest, 
            @ModelAttribute Product product, BindingResult bindingResult, 
            Model model) { 
 
        List<MultipartFile> files = product.getImages(); 
 
        List<String> fileNames = new ArrayList<String>(); 
 
        if (null != files && files.size() > 0) { 
            for (MultipartFile multipartFile : files) { 
 
                String fileName = multipartFile.getOriginalFilename(); 
                fileNames.add(fileName); 
 
                File imageFile = new File(servletRequest.getServletContext() 
                        .getRealPath("/image"), fileName); 
                try { 
                    multipartFile.transferTo(imageFile); 
                } catch (IOException e) { 
                    e.printStackTrace(); 
                } 
            } 
        } 
 
        // save product here 
        model.addAttribute("product", product); 
        return "ProductDetails"; 
    }