How to parse parameters array with square brackets?

Question

The user wants to add a tag and its related files. He will access the Struts2 action by following query URL:

Test/addTag?tag=java&files[]=1.java&files[]=2.java&files[]=3.java

In the past I was using HttpServletRequest.getParameterValues() method to parse the files[] parameter and it worked perfectly.

But after migrating the architecture to Struts2 (I was using JSP+Servlet before), it doesn't work anymore. I tried following ways to define the files[] field in Struts2 Acton, but neither works (it always return null when calling the getter method)

private String files;
private String[] files;
private List<String> files;

(By the way the tag parameter could be parsed correctly)

See this answer: http://stackoverflow.com/a/19386253/1594449 — gknicker, Jan 28 '15 at 08:46

score 0 · Accepted Answer · edited May 23 '17 at 12:20

0

Struts2 doesn't like the files[]=1.java&files[]=2.java query string format.

Use the traditional files=1.java&files=2.java instead. See also this answer.

edited May 23 '17 at 12:20

Community

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answered Jan 28 '15 at 08:50

gknicker

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Thanks! you even helped me solved the next question.. (I'm using jQuery to build the query URL) – Mark Ma Jan 28 '15 at 09:08
Related: this is also the reason for the need to [alter the code of dropzone.js to make it work with Struts2](http://stackoverflow.com/a/26080212/1654265), for example. – Andrea Ligios Jan 28 '15 at 09:22

How to parse parameters array with square brackets?

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