Method and example code of file download based on Java Web

Java Web implementation file download

Don't use the < a > tag to download. This will open the file instead of downloading it

For example:

< a href = "E: \ mydesktop \ 37fecd65330184de67d419a8d02e7081. JPG" > Download

If I write this, the browser will open the picture directly, unless it is a file that the browser can't open

So we still need to use Java's own file reading and writing to download files

< a href = "downloadfile? Filename = < s: property value ='document_filename '/ >" > Download

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