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In this article Xiaobian for you to introduce in detail "java development of spring webflow how to upload a single file and multiple files function", detailed content, clear steps, details handled properly, I hope that this "java development of spring webflow how to upload a single file and multiple files function" article can help you solve doubts, following the editor's ideas slowly in-depth, together to learn new knowledge.

Upload a single file

Prepare for

1. If you use spring security in your project, refer to the previous article, use the second method in the previous article, and remove MultipartFilter (if any), otherwise you won't get the file.

two。 Variables in the process, such as those defined with var tags, need to implement the Serializable interface.

Realization process

Add the following dependencies to the pom.xml file:

Commons-fileupload commons-fileupload 1.2.1 commons-io commons-io 2.4

Add a file upload parser to spring-servlet.xml (Spring MVC's configuration file):

Entity class, remember that to implement the Serializable interface, the attribute type is MultipartFile:

@ Componentpublic class GoodsEntity implements Serializable {private static final long serialVersionUID = 1L; private MultipartFile images; public MultipartFile getImages () {return images;} public void setImages (MultipartFile images) {this.images = images;}}

Process definition code, nothing special:

Upload the form code without special configuration:

Pictures of goods:

That's it.

Upload multiple files

Uploading a single file can be achieved with a slight modification on the basis of the previous upload sheet.

Realize

First, the entity class needs to be modified to use List to store multiple files:

@ Componentpublic class GoodsEntity implements Serializable {private static final long serialVersionUID = 1L; private List images; public List getImages () {return images;} public void setImages (List images) {this.images = images;}}

The upload form also needs to be modified:

Pictures of goods:

Just add a multiple= "multiple" attribute.

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