Import of apache velocity in gradle downgrades HttpServletResponse

Question

I have a spring boot project with the following code:

import org.springframework.web.context.request.NativeWebRequest;
import javax.servlet.http.HttpServletResponse

foo(NativeWebRequest req){
    HttpServletResponse res = req.getNativeResponse(HttpServletResponse.class);
    res.setCharacterEncoding("UTF-8");
}

And everything worked fine until I added velocity dependencies:

compile group: 'org.apache.velocity', name: 'velocity', version: '1.7'
compile group: 'org.apache.velocity', name: 'velocity-tools', version: '2.0'

Now I get:
In Eclipse: The method setCharacterEncoding(String) is undefined for the type HttpServletResponse
And in gradle bootJar:

.../SomeFile.java:12: error: cannot find symbol
            res.setCharacterEncoding("UTF-8");
               ^
  symbol:   method setCharacterEncoding(String)
  location: variable res of type HttpServletResponse

So I figure that the version of the library that imports HttpServletResponse is somehow impacted by those dependencies.

my spring boot plugin is: id 'org.springframework.boot' version '2.3.2.RELEASE'

All dependencies in the same project are:

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-web'
    implementation 'org.springframework.boot:spring-boot-starter-actuator'
    developmentOnly 'org.springframework.boot:spring-boot-devtools'
    annotationProcessor 'org.springframework.boot:spring-boot-configuration-processor'

    // https://mvnrepository.com/artifact/org.apache.velocity/velocity
    compile group: 'org.apache.velocity', name: 'velocity', version: '1.7'

    // https://mvnrepository.com/artifact/org.apache.velocity/velocity-tools
    compile group: 'org.apache.velocity', name: 'velocity-tools', version: '2.0'
}

From gradle dependencies I can see that velocity sets javax.servlet:servlet-api:2.3 but without the velocity dependencies javax.servlet doesn't appear in gradle dependencies at all, so I don't know what the version was before.

From commenting out I could determine that implementation 'org.springframework.boot:spring-boot-starter-web' provides javax.servlet if velocity is not a dependency. (per gradle dependencies Version 2.3.2 in compileClasspath and (n) in implementation)

I also tried gradle dependencyInsight --configuration compile --dependency javax.servlet:servlet-api without velocity, but got No dependencies matching given input were found in configuration 'compile'.

I think these questions come very close, but I'm still unsure how to proceed in gradle:
setCharacterEncoding problems
Apache Velocity + Servlet 3.0

score 0 · Answer 1 · answered Aug 10 '20 at 13:58

0

replacing
compile group: 'org.apache.velocity', name: 'velocity-tools', version: '2.0'
with

compile('org.apache.velocity:velocity-tools:2.0') {
    exclude group: 'javax.servlet', module: 'servlet-api'
}

worked for me.

answered Aug 10 '20 at 13:58

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Import of apache velocity in gradle downgrades HttpServletResponse

1 Answers1