Servlet3 file upload operation

In servlet2 In 5, when we want to realize the file upload function, we generally need to use third-party open-source components, such as Apache's Commons fileUpload component, which is in servlet3 0 provides native support for file upload. We don't need any third-party upload components to directly use servlet3 The API provided by 0 can realize the file upload function.

1、 Using servlet3 The API provided by 0 implements file upload

1.1. Compile upload page

1.2. Develop and process the servlet for file upload

1. Use the annotation @ multipartconfig to identify a servlet as supporting file upload.

　　2、Servlet3. 0 encapsulates the post request of multipart / form data into parts, and operates the uploaded files through parts.

The uploadservlet code is as follows:

As you can see, using servlet3 The API provided by 0 is very convenient to upload files.

summary

The above is the servlet 3 file upload operation introduced by Xiaobian. I hope it will be helpful to you. If you have any questions, please leave me a message, and Xiaobian will reply to you in time. Thank you very much for your support for the programming tips website!