SpringBoot项目配置jackson对java8时间的序列化和反序列化

柔情只为你懂 2023-02-14 10:45 3阅读 0赞

### SpringBoot项目中配置使用java8 time ###

> 配置jackson对java8时间(LocalDateTime、LocalDate、LocalTime )的序列化和反序列化

> 1、相关配置如下

import com.fasterxml.jackson.databind.ObjectMapper;
    import org.springframework.boot.autoconfigure.AutoConfigureBefore;
    import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
    import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
    import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    import java.time.ZoneId;
    import java.util.Locale;
    import java.util.TimeZone;
    
    /** * JacksonConfig */
    @Configuration
    @ConditionalOnClass(ObjectMapper.class)
    @AutoConfigureBefore(JacksonAutoConfiguration.class)
    public class JacksonConfig { 
    	@Bean
    	public Jackson2ObjectMapperBuilderCustomizer customizer() { 
    		return builder -> { 
    			/** * 配置Date的格式化 */
    			builder.locale(Locale.CHINA);
    			builder.timeZone(TimeZone.getTimeZone(ZoneId.systemDefault()));
    			builder.simpleDateFormat("yyyy-MM-dd HH:mm:ss");
    			/** * 配置java8 时间配置 */
    			builder.modules(new CustomJavaTimeModule());
    		};
    	}
    }

import com.fasterxml.jackson.databind.module.SimpleModule;
    import com.fasterxml.jackson.datatype.jsr310.PackageVersion;
    import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
    import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
    import com.fasterxml.jackson.datatype.jsr310.deser.LocalTimeDeserializer;
    import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
    import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
    import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
    
    import java.time.LocalDate;
    import java.time.LocalDateTime;
    import java.time.LocalTime;
    import java.time.format.DateTimeFormatter;
    
    /** * 配置java8 time的序列化器和反序列化器 */
    public class CustomJavaTimeModule extends SimpleModule { 
    
    	public CustomJavaTimeModule() { 
    		super(PackageVersion.VERSION);
    		this.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
    		this.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
    		this.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
    
    		this.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
    		this.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
    		this.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
    	}
    }

> 2、jackson在springboot项目中是通过JacksonAutoConfiguration自动配置的，我们需要在jackson自动配置之前把设置的java8的序列化器和反序列化器配置进去。  
> resources/META-INF下的spring.factories中配置JacksonConfig

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
      package.JacksonConfig

> 小尾巴~~  
> 只要有积累，就会有进步