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Spring Framework - ConversionService Examples

Spring Framework 

This examples uses DefaultConversionService, which is one of the ConversionService implementations. DefaultConversionService, by default, registers most of the appropriate Converters implementations. 

package com.logicbig.example;


import org.springframework.core.convert.support.DefaultConversionService;

import java.util.Collection;
import java.util.Currency;

public class ConversionServiceExample {
    public static void main (String[] args) {
        DefaultConversionService service = new DefaultConversionService();

        Currency convert = service.convert("USD", Currency.class);
        System.out.println(convert);

        Collection<String> list = service.convert("Deb, Mike, Kim",
                                                        Collection.class);
        System.out.println(list);
    }
}

Output

USD
[Deb, Mike, Kim]




Using ConversionService in Spring container. 

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
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();
    }
}
Original Post




This examples uses DefaultConversionService, which is one of the ConversionService implementations. DefaultConversionService, by default, registers most of the appropriate Converters implementations. 

package com.logicbig.example;

import org.springframework.core.convert.support.DefaultConversionService;
import java.util.Collection;
import java.util.Currency;

public class ConversionServiceExample {
    public static void main (String[] args) {
        DefaultConversionService service = new DefaultConversionService();

        Currency convert = service.convert("USD", Currency.class);
        System.out.println(convert);

        Collection<String> list = service.convert("Deb, Mike, Kim",
                                                        Collection.class);
        System.out.println(list);
    }
}

Output

USD
[Deb, Mike, Kim]
Original Post




package com.logicbig.example;

import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.support.DefaultConversionService;

public class ConverterFactoryExample {
    public static void main(String[] args) {
        ConversionService conversionService = new DefaultConversionService();
        //StringToNumberConverterFactory is used
        Double num = conversionService.convert("1.5", Double.class);
        System.out.println(num);
    }
}

Output

1.5
Original Post

See Also