Storing html file in a String in java

Question

I am sending emails using amazon java sdk. I have to send html template as mail. I have written a program for this and it is working fine. But now I am storing the whole html code in a single String. But whenever i need to edit the template, I have to edit the program (I mean the String variable). And also I have to take care the special characters like " \ ...etc in that html code. Please suggest me an elegant way to solve this issue.

do you mean you have the template hard coded in a java class ? or that you read a file and stiore the content of the file in a String ? i guess the first so just store the html as file and read it when you need it from that file — Peter
– Peter, Commented Dec 11, 2012 at 7:41
@Peter Yes. Noe I have hard coded it inside my java class. I know it is not a good way. — Neeraj
– Neeraj, Commented Dec 11, 2012 at 7:44
As Andrey Adamovich said, use template engine. I recommend Freemarker which is easy to use. — faylon
– faylon, Commented Dec 11, 2012 at 7:45

Community · Accepted Answer · 2017-05-23 10:33:53Z

2

Use a template engine for that and store your template externally either in class path or on a file system. Here is a question that may help you selecting one: https://stackoverflow.com/questions/2381619/best-template-engine-in-java

edited May 23, 2017 at 10:33

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answered Dec 11, 2012 at 7:40

Andrey Adamovich

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Subhrajyoti Majumder · Accepted Answer · 2012-12-11 07:42:28Z

1

Use Apache Common Lang api's StringEscapeUtils#escapeHtml, It escapes the characters in a String using HTML entities and return a new escaped String, null if null string input.

For example:

"US" & "UK"

becomes:

&quot;US&quot; &amp; &quot;UK&quot;.

answered Dec 11, 2012 at 7:42

Subhrajyoti Majumder

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mtk · Accepted Answer · 2012-12-11 07:43:40Z

1

Check the Apache Velocity Project. You can create template for several things. From it's user-guide page

Velocity can be used to generate web pages, SQL, PostScript and other output from templates. It can be used either as a standalone utility for generating source code and reports, or as an integrated component of other systems.

You can use a VTL(Velocity Template Language) . A example from above link

<HTML>
<BODY>
Hello $customer.Name!
<table>
#foreach( $mud in $mudsOnSpecial )
   #if ( $customer.hasPurchased($mud) )
      <tr>
        <td>
          $flogger.getPromo( $mud )
        </td>
      </tr>
   #end
#end
</table>

answered Dec 11, 2012 at 7:43

mtk

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Community · Accepted Answer · 2017-05-23 11:55:16Z

0

Better and easiest way is reading the html file line by line using simple file reading operation and append this each line to a single String. And also I found this solution (also a better one, if you are ready to add one more library file to your project) from SO.

edited May 23, 2017 at 11:55

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answered Dec 12, 2012 at 5:05

Neeraj

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