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: stackoverflow.com/a/19386253/1594449

gknicker
– gknicker

2015-01-28 08:46:41 +00:00
Commented Jan 28, 2015 at 8:46 — gknicker
– gknicker, Commented Jan 28, 2015 at 8:46

Community · Accepted Answer · 2017-05-23 12:20:35Z

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, 2017 at 12:20

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answered Jan 28, 2015 at 8:50

gknicker

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2 Comments

Mark Ma Over a year ago

Thanks! you even helped me solved the next question.. (I'm using jQuery to build the query URL)

Andrea Ligios Over a year ago

Related: this is also the reason for the need to alter the code of dropzone.js to make it work with Struts2, for example.

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