[JAVA-26374-boot-data] Moved "Spring Boot: Customize the Jackson ObjectMapper" article to spring-boot-data (#15095)

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/boot/jackson/app/Application.java

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+package com.baeldung.boot.jackson.app;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+
+@SpringBootApplication
+@ComponentScan(basePackages = "com.baeldung.boot.jackson.controller")
+public class Application {
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/boot/jackson/config/CoffeeConstants.java

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+package com.baeldung.boot.jackson.config;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
+
+public class CoffeeConstants {
+
+    public static final String DATETIME_FORMAT = "dd-MM-yyyy HH:mm";
+    public static final LocalDateTime FIXED_DATE = LocalDateTime.now();
+    public static LocalDateTimeSerializer LOCAL_DATETIME_SERIALIZER = new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DATETIME_FORMAT));
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/boot/jackson/config/CoffeeCustomizerConfig.java

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+package com.baeldung.boot.jackson.config;
+
+import static com.baeldung.boot.jackson.config.CoffeeConstants.LOCAL_DATETIME_SERIALIZER;
+
+import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+
+@Configuration
+public class CoffeeCustomizerConfig {
+
+    @Bean
+    public Jackson2ObjectMapperBuilderCustomizer jsonCustomizer() {
+        return builder -> builder.serializationInclusion(JsonInclude.Include.NON_NULL)
+                .serializers(LOCAL_DATETIME_SERIALIZER);
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/boot/jackson/config/CoffeeHttpConverterConfiguration.java

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+package com.baeldung.boot.jackson.config;
+
+import static com.baeldung.boot.jackson.config.CoffeeConstants.LOCAL_DATETIME_SERIALIZER;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+
+@Configuration
+public class CoffeeHttpConverterConfiguration {
+
+    @Bean
+    public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter() {
+        Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder()
+                .serializers(LOCAL_DATETIME_SERIALIZER)
+                .serializationInclusion(JsonInclude.Include.NON_NULL);
+        return new MappingJackson2HttpMessageConverter(builder.build());
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/boot/jackson/config/CoffeeJacksonBuilderConfig.java

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+package com.baeldung.boot.jackson.config;
+
+import static com.baeldung.boot.jackson.config.CoffeeConstants.LOCAL_DATETIME_SERIALIZER;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+
+@Configuration
+public class CoffeeJacksonBuilderConfig {
+
+    @Bean
+    @Primary
+    public Jackson2ObjectMapperBuilder jackson2ObjectMapperBuilder() {
+        return new Jackson2ObjectMapperBuilder()
+                .serializers(LOCAL_DATETIME_SERIALIZER)
+                .serializationInclusion(JsonInclude.Include.NON_NULL);
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/boot/jackson/config/CoffeeObjectMapperConfig.java

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+package com.baeldung.boot.jackson.config;
+
+import static com.baeldung.boot.jackson.config.CoffeeConstants.LOCAL_DATETIME_SERIALIZER;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+
+@Configuration
+public class CoffeeObjectMapperConfig {
+
+    @Bean
+    @Primary
+    public ObjectMapper objectMapper() {
+        JavaTimeModule module = new JavaTimeModule();
+        module.addSerializer(LOCAL_DATETIME_SERIALIZER);
+        return new ObjectMapper().setSerializationInclusion(JsonInclude.Include.NON_NULL)
+            .registerModule(module);
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/boot/jackson/config/CoffeeRegisterModuleConfig.java

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+package com.baeldung.boot.jackson.config;
+
+import static com.baeldung.boot.jackson.config.CoffeeConstants.LOCAL_DATETIME_SERIALIZER;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+
+@Configuration
+@PropertySource("classpath:coffee.properties")
+public class CoffeeRegisterModuleConfig {
+
+    @Bean
+    public JavaTimeModule javaTimeModule() {
+        JavaTimeModule module = new JavaTimeModule();
+        module.addSerializer(LOCAL_DATETIME_SERIALIZER);
+        return module;
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/boot/jackson/controller/CoffeeController.java

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+package com.baeldung.boot.jackson.controller;
+
+import static com.baeldung.boot.jackson.config.CoffeeConstants.FIXED_DATE;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.boot.jackson.model.Coffee;
+
+@RestController
+public class CoffeeController {
+
+    @GetMapping("/coffee")
+    public Coffee getCoffee(
+            @RequestParam(required = false) String brand,
+            @RequestParam(required = false) String name) {
+        return new Coffee().setBrand(brand)
+                .setDate(FIXED_DATE)
+                .setName(name);
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/boot/jackson/model/Coffee.java

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+package com.baeldung.boot.jackson.model;
+
+import java.time.LocalDateTime;
+
+public class Coffee {
+
+    private String name;
+
+    private String brand;
+
+    private LocalDateTime date;
+
+    public String getName() {
+        return name;
+    }
+
+    public Coffee setName(String name) {
+        this.name = name;
+        return this;
+    }
+
+    public String getBrand() {
+        return brand;
+    }
+
+    public Coffee setBrand(String brand) {
+        this.brand = brand;
+        return this;
+    }
+
+    public LocalDateTime getDate() {
+        return date;
+    }
+
+    public Coffee setDate(LocalDateTime date) {
+        this.date = date;
+        return this;
+    }
+}

spring-boot-modules/spring-boot-data/src/main/resources/coffee.properties

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+spring.jackson.default-property-inclusion=non_null