Can i read context-param using a normal java class file form web.xml file

Question

Web.xml

    <param-name>driver</param-name>
    <param-value>com.mysql.jdbc.Driver</param-value>
</context-param>
<context-param>
    <param-name>url</param-name>
    <param-value>jdbc:mysql:///gts_user</param-value>
</context-param>
<context-param>
    <param-name>user_name</param-name>
    <param-value>root</param-value>
</context-param>
<context-param>
    <param-name>password</param-name>
    <param-value>gts</param-value>
</context-param>

i want get all value from web.xml using a java class file

No. The context will not be there in normal java file. You need the context to read param. — Shriram
– Shriram, Commented May 2, 2014 at 6:28
pass the servletcontext object to your java object constructor. Make sure that it won't affect the performance... — Shriram
– Shriram, Commented May 2, 2014 at 6:32

Sotirios Delimanolis · Accepted Answer · 2014-05-02 06:30:01Z

2

You'll be able to get access to all those context-param elements if you have access to the ServletContext. You have access to the ServletConfig in a number of places, namely, Servlet#init(..), Filter#init(..), and most of the listener types.

The method you are looking for is ServletContext#getInitParameterNames().

Otherwise, you will have to parse the web.xml yourself.

answered May 2, 2014 at 6:30

Sotirios Delimanolis

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6 Comments

Ashish Srivastava Over a year ago

ServleContext.getInitParameterNames() is not working in java class file

Sotirios Delimanolis Over a year ago

@AshishSrivastava Please re-read my answer. If you have access to the ServletContext provided by the Servlet container, you can use it. Otherwise, you will need to parse the web.xml yourself.

Ashish Srivastava Over a year ago

ohh sorry tell me how can i get the path of web.xml file using java for parse it

Sotirios Delimanolis Over a year ago

@AshishSrivastava You can always get it relative to your current working directory. I'll just say that that is a very bad idea and you shouldn't do it. There is absolutely no reason you should.

Sotirios Delimanolis Over a year ago

@AshishSrivastava No. The only way you should do it is through the Servlet container provided ServletContext.

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