Cannot get context-param in web.xml from Spring Boot Controller

Question

I have a simple webapp which use Spring Boot web and I have a web.xml file in src/main/webapp/WEB-INF which contains context-param like this

<context-param>
    <description>Directory containing the configuration files</description>
    <param-name>confDir</param-name>
    <param-value>/opt/rasdaman/etc/</param-value>
</context-param>

In Servlet Controller, I could get the Servlet Context

@Autowired
private ServletContext servletContext;

but when I tried to get the parameter, it returns null

servletContext.getInitParameter("confDir");

when I tried to get the real path to the servletContext

servletContext.getRealPath(File.separator);

it returns

 "..../src/main/webapp/"

How can I get the configuration variable in web.xml?

Thanks

it is a legacy source which use web.xml configuration so I could not move to other file. — Bằng Rikimaru
– Bằng Rikimaru, Commented Feb 15, 2017 at 12:34

jstuartmilne · Accepted Answer · 2017-02-15 12:47:23Z

1

Havent tried it myself but. If you make a Controller implement ServletContextAware I think you can get your context-param from : http://docs.spring.io/spring/docs/3.0.x/javadoc-api/org/springframework/web/context/ServletContextAware.html

The idea would be

public class MyCoolController implements ServletContextAware {


    @Override
    setServletContext(ServletContext servletContext) {
        String confDir = servletContext.getInitParameter("confDir");
    }
}

Give it a shot

answered Feb 15, 2017 at 12:47

jstuartmilne

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6 Comments

jstuartmilne Over a year ago

Are you deploying your app as a war file?

Bằng Rikimaru Over a year ago

it is a jar file as Spring Boot starts like this public static void main(String[] args) { ApplicationContext app = SpringApplication.run(ApplicationMain.class, args);

jstuartmilne Over a year ago

You should probably take a look at this then spring.io/guides/gs/convert-jar-to-war

Bằng Rikimaru Over a year ago

I tried change to war and add dependency as docs.spring.io/spring-boot/docs/current/reference/htmlsingle/… for maven but also still null for configuration variable in web.xml.

jstuartmilne Over a year ago

When your war is packaged. Do you see your web.xml inside the war file in the appropriate directory?

|

Lucas · Accepted Answer · 2017-06-19 17:26:41Z

0

Thanks to sudakatux the problem is I used deploy Spring Boot with jar not war then cannot read from web.xml

follow here to change to war and deploy with tomcat EE normally

edited Jun 19, 2017 at 17:26

Lucas

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answered Feb 15, 2017 at 13:42

Bằng Rikimaru

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