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Spring - Using ConversionService With ApplicationContext

[Last Updated: Oct 18, 2022]

ApplicationContext and ConversionService

In the core application context like AnnotationConfigApplicationContext, Spring doesn't have any mechanism or hook on the client code to configure ConversionService instance as it does in spring MVC environment. In Core application context environment if we want to use it on client code then we have to inject it as a normal bean and apply the conversion manually by calling ConversionService#convert() method.


Example

package com.logicbig.example;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.convert.ConversionService;
import java.util.List;

public class ClientBean {
  @Autowired
  private ConversionService conversionService;

  public void showAsList(String listAsString) {
      List<String> list = conversionService.convert(listAsString, List.class);
      list.forEach(System.out::println);
  }
}
package com.logicbig.example;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.support.DefaultConversionService;

@Configuration
public class AppConfig {
  @Bean
  public ConversionService conversionService() {
      return new DefaultConversionService();
  }

  @Bean
  public ClientBean clientBean() {
      return new ClientBean();
  }
}
package com.logicbig.example;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class ExampleMain {
  public static void main(String[] args) {
      AnnotationConfigApplicationContext context = new
              AnnotationConfigApplicationContext(AppConfig.class);

      ClientBean clientBean = context.getBean(ClientBean.class);
      clientBean.showAsList("one, two, three");
  }
}

Output

one
two
three

Example Project

Dependencies and Technologies Used:

  • spring-context 5.3.23 (Spring Context)
     Version Compatibility: 3.2.3.RELEASE - 5.3.23 Version List
    ×

    Version compatibilities of spring-context with this example:

    • 3.2.3.RELEASE
    • 3.2.4.RELEASE
    • 3.2.5.RELEASE
    • 3.2.6.RELEASE
    • 3.2.7.RELEASE
    • 3.2.8.RELEASE
    • 3.2.9.RELEASE
    • 3.2.10.RELEASE
    • 3.2.11.RELEASE
    • 3.2.12.RELEASE
    • 3.2.13.RELEASE
    • 3.2.14.RELEASE
    • 3.2.15.RELEASE
    • 3.2.16.RELEASE
    • 3.2.17.RELEASE
    • 3.2.18.RELEASE
    • 4.0.0.RELEASE
    • 4.0.1.RELEASE
    • 4.0.2.RELEASE
    • 4.0.3.RELEASE
    • 4.0.4.RELEASE
    • 4.0.5.RELEASE
    • 4.0.6.RELEASE
    • 4.0.7.RELEASE
    • 4.0.8.RELEASE
    • 4.0.9.RELEASE
    • 4.1.0.RELEASE
    • 4.1.1.RELEASE
    • 4.1.2.RELEASE
    • 4.1.3.RELEASE
    • 4.1.4.RELEASE
    • 4.1.5.RELEASE
    • 4.1.6.RELEASE
    • 4.1.7.RELEASE
    • 4.1.8.RELEASE
    • 4.1.9.RELEASE
    • 4.2.0.RELEASE
    • 4.2.1.RELEASE
    • 4.2.2.RELEASE
    • 4.2.3.RELEASE
    • 4.2.4.RELEASE
    • 4.2.5.RELEASE
    • 4.2.6.RELEASE
    • 4.2.7.RELEASE
    • 4.2.8.RELEASE
    • 4.2.9.RELEASE
    • 4.3.0.RELEASE
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    • 4.3.30.RELEASE
    • 5.0.0.RELEASE
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    • 5.0.10.RELEASE
    • 5.0.11.RELEASE
    • 5.0.12.RELEASE
    • 5.0.13.RELEASE
    • 5.0.14.RELEASE
    • 5.0.15.RELEASE
    • 5.0.16.RELEASE
    • 5.0.17.RELEASE
    • 5.0.18.RELEASE
    • 5.0.19.RELEASE
    • 5.0.20.RELEASE
    • 5.1.0.RELEASE
    • 5.1.1.RELEASE
    • 5.1.2.RELEASE
    • 5.1.3.RELEASE
    • 5.1.4.RELEASE
    • 5.1.5.RELEASE
    • 5.1.6.RELEASE
    • 5.1.7.RELEASE
    • 5.1.8.RELEASE
    • 5.1.9.RELEASE
    • 5.1.10.RELEASE
    • 5.1.11.RELEASE
    • 5.1.12.RELEASE
    • 5.1.13.RELEASE
    • 5.1.14.RELEASE
    • 5.1.15.RELEASE
    • 5.1.16.RELEASE
    • 5.1.17.RELEASE
    • 5.1.18.RELEASE
    • 5.1.19.RELEASE
    • 5.1.20.RELEASE
    • 5.2.0.RELEASE
    • 5.2.1.RELEASE
    • 5.2.2.RELEASE
    • 5.2.3.RELEASE
    • 5.2.4.RELEASE
    • 5.2.5.RELEASE
    • 5.2.6.RELEASE
    • 5.2.7.RELEASE
    • 5.2.8.RELEASE
    • 5.2.9.RELEASE
    • 5.2.10.RELEASE
    • 5.2.11.RELEASE
    • 5.2.12.RELEASE
    • 5.2.13.RELEASE
    • 5.2.14.RELEASE
    • 5.2.15.RELEASE
    • 5.2.16.RELEASE
    • 5.2.17.RELEASE
    • 5.2.18.RELEASE
    • 5.2.19.RELEASE
    • 5.2.20.RELEASE
    • 5.2.21.RELEASE
    • 5.2.22.RELEASE
    • 5.3.0
    • 5.3.1
    • 5.3.2
    • 5.3.3
    • 5.3.4
    • 5.3.5
    • 5.3.6
    • 5.3.7
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    • 5.3.11
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    • 5.3.14
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    • 5.3.16
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    • 5.3.18
    • 5.3.19
    • 5.3.20
    • 5.3.21
    • 5.3.22
    • 5.3.23

    Versions in green have been tested.

  • JDK 8
  • Maven 3.8.1

Spring - Using ConversionService With ApplicationContext Select All Download
  • spring-conversion-service-with-application-context
    • src
      • main
        • java
          • com
            • logicbig
              • example
                • ExampleMain.java

    See Also