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URL encoding using java

Posted on 2006-11-03
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Last Modified: 2012-05-05
Hi
When I encode a string value using URLEncoder.encode(strName) it replaces the white spaces in the string with "+" symbol.
However, want it to replace the white spaces to "%20" instead of "+" symbol so that it would be compatible across browsers and with JavaScript escape() and unescape() functions.

Is there a way to force URLEncoder to use "%20" instead of "+" signs?

Thanks in advance.

Regards,
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Question by:ashishanand
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LVL 14

Expert Comment

by:hoomanv
ID: 17864830
You'll have to do it yourself by replacing all + signs with %20
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LVL 14

Expert Comment

by:hoomanv
ID: 17864841
str = str.replaceAll("\\+", "%20");
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Author Comment

by:ashishanand
ID: 17864917
I understand that it can be done by using replaceAll() however, I'm concerned with encoding / handling of special characters.

If we use replaceAll() , we would need to handle each of the special characters explicitly and this means more work (including testing task).

I'm looking for a generic solution.

Regards,
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LVL 14

Expert Comment

by:hoomanv
ID: 17864971
You are only concerned about one special char: space
You can correct it by including only one more line
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Author Comment

by:ashishanand
ID: 17864996
Hi hoomany,

I'm not clear by what you have just said. Are you saying that I should be only concerned with just white space.

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Expert Comment

by:hoomanv
ID: 17865010
Talking clearly

> Is there a way to force URLEncoder to use "%20" instead of "+" signs?
Not that I'm aware of

However you can first url encode your url
Then replace all undesirable + signs with %20

> we would need to handle each of the special characters explicitly
You don't need, only white space as you are concerned about
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Author Comment

by:ashishanand
ID: 17865073
As mentioned earlier, I'm not only concerned with white space. I'm also concerned about other special character.

Are saying that we should only be concerned about handling white space while working with java URLEncoder and javascript unescape.
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Expert Comment

by:hoomanv
ID: 17865129
> I'm also concerned about other special character
Could you name some of them ?
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Author Comment

by:ashishanand
ID: 17865189
Some of the special characters are &*<>/?-_%'".\/|{}[]
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Expert Comment

by:hoomanv
ID: 17865201
And URLEncoder is responsible for all of them

URLEncoder.encode("&*<>/?-_%'.\\/|{}[]", "UTF-8"); --> %26*%3C%3E%2F%3F-_%25%27.%5C%2F%7C%7B%7D%5B%5D

So, You only need to replace + signes to %20
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Accepted Solution

by:
hoomanv earned 375 total points
ID: 17865211
Original + signs will be converted to %2B
And spaces will become +
Then just call replaceAll("\\+", "%20");
and those + will become %20 too
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