# jspringboot 时间配置

```java
package com.conson.tech.frame.core.config;

import cn.hutool.core.date.DatePattern;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
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.deser.YearMonthDeserializer;
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 com.fasterxml.jackson.datatype.jsr310.ser.YearMonthSerializer;
import com.fasterxml.jackson.module.paramnames.ParameterNamesModule;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
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.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.YearMonth;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Locale;
import java.util.TimeZone;

/**
 * admin
 * Created by admin on 2020/2/26.
 */
@Configuration
@ConditionalOnClass(ObjectMapper.class)
@AutoConfigureBefore(JacksonAutoConfiguration.class)
public class JacksonConfiguration {


    @Bean
    @ConditionalOnMissingBean
    public Jackson2ObjectMapperBuilderCustomizer customizer() {
        SimpleModule simpleModule = new SimpleModule();
        //Long 转String类型，解决前端丢失精度
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);

        simpleModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATETIME_PATTERN)));
        simpleModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATE_PATTERN)));
      
        simpleModule.addDeserializer(YearMonth.class, new YearMonthDeserializer(DateTimeFormatter.ofPattern("yyyy-MM")));
        
        simpleModule.addSerializer(YearMonth.class, new YearMonthSerializer(DateTimeFormatter.ofPattern("yyyy-MM")));

        simpleModule.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern(DatePattern.NORM_TIME_PATTERN)));
        simpleModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATETIME_PATTERN)));
        simpleModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATE_PATTERN)));
        simpleModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DatePattern.NORM_TIME_PATTERN)));

        return builder -> {
            builder.locale(Locale.CHINA);
            builder.timeZone(TimeZone.getTimeZone(ZoneId.systemDefault()));
            builder.simpleDateFormat(DatePattern.NORM_DATETIME_PATTERN);
//            builder.serializationInclusion(JsonInclude.Include.NON_NULL);
            builder.modules(simpleModule,new ParameterNamesModule(),new Jdk8Module());
        };
    }


}

```