问题
Spring Boot 2
In application.yml
http:
converters:
preferred-json-mapper: gson
Now I write class with custom settings for Gson
:
public class GsonUtil {
public static GsonBuilder gsonbuilder = new GsonBuilder();
public static Gson gson;
public static JsonParser parser = new JsonParser();
static {
// @Exclude -> to exclude specific field when serialize/deserilaize
gsonbuilder.addSerializationExclusionStrategy(new ExclusionStrategy() {
@Override
public boolean shouldSkipField(FieldAttributes field) {
return field.getAnnotation(Exclude.class) != null;
}
@Override
public boolean shouldSkipClass(Class<?> clazz) {
return false;
}
});
gsonbuilder.setPrettyPrinting();
gson = gsonbuilder.create();
}
}
How I can config Spring Boot
with my custom Gson
object from GsonUtil
?
回答1:
You need to register org.springframework.http.converter.json.GsonHttpMessageConverter
converter which handles serialisation and deserialisation behind the scene. You can do that in this way:
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.GsonHttpMessageConverter;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import java.util.List;
@EnableWebMvc
@Configuration
public class WebConfig implements WebMvcConfigurer {
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
//You can provide your custom `Gson` object.
converters.add(new GsonHttpMessageConverter(GsonUtil.gson));
}
}
If you want to keep default list of converters you can also use extendMessageConverters
method instead of configureMessageConverters
.
来源:https://stackoverflow.com/questions/61464046/how-config-gson-in-spring-boot