LocalDateTime格式化
使用下面的配置相当于全局配置就不需要给字段添加@JsonFormat(pattern = DateUt.YYYY_MM_DD_HH_MM_SS)
如果个别字段需要不同的配置可使用@JsonFormat(pattern = DateUt.YYYY_MM_DD)，@JsonFormat会优先使用，反序列化亦可使用@JsonFormat注解
package com.example.mpdemo.config;
import com.example.mpdemo.common.IBaseEnum;
import com.example.mpdemo.util.DateUt;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
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 org.springframework.boot.jackson.JsonComponentModule;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
/**
* @from: fhadmin.cn
* @Date: 2021/8/19
* @Description: 时间统一格式化
*/
@Configuration
public class JSONFormatConfig {
private static final DateTimeFormatter ymdhms = DateTimeFormatter.ofPattern(DateUt.YYYY_MM_DD_HH_MM_SS);
private static final DateTimeFormatter ymd = DateTimeFormatter.ofPattern(DateUt.YYYY_MM_DD);
private static final DateTimeFormatter hms = DateTimeFormatter.ofPattern(DateUt.HH_MM_SS);
@Bean
@Primary
public ObjectMapper objectMapper() {
ObjectMapper objectMapper = new ObjectMapper();
JavaTimeModule javaTimeModule = new JavaTimeModule();
//序列化设置时间格式
javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(ymdhms));
javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(ymd));
javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(hms));
//反序列化设置时间格式
javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(ymdhms));
javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(ymd));
javaTimeModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(hms));
objectMapper.registerModule(javaTimeModule);
//序列化枚举值为数据库存储值 缺少后打印枚举不能转成对应值，需自定义toString方法/或者使用@JsonValue注解
//objectMapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);
//设置序列化枚举格式
JsonComponentModule jsonComponentModule = new JsonComponentModule();
jsonComponentModule.addSerializer(IBaseEnum.class,new BaseEnumSerializer());
objectMapper.registerModule(jsonComponentModule);
return objectMapper;
}
}
Date格式化
#Date类型生效
spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
spring.jackson.time-zone=GMT+8
枚举格式化
把下面的类注册在objectMapper中
//设置序列化枚举格式
JsonComponentModule jsonComponentModule = new JsonComponentModule();
jsonComponentModule.addSerializer(IBaseEnum.class,new BaseEnumSerializer());
objectMapper.registerModule(jsonComponentModule);
根据业务需求调整需要格式化的结构
package com.example.mpdemo.config;
import com.example.mpdemo.common.IBaseEnum;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import org.springframework.boot.jackson.JsonComponent;
import java.io.IOException;
/**
* @from: fhadmin.cn
* @Date: 2021/8/19
* @Description: 组织类型枚举序列化
*/
//可以使用JsonSerializer
public class BaseEnumSerializer extends JsonSerializer
//public class BaseEnumSerializer extends StdSerializer
//protected BaseEnumSerializer(){
// super(IBaseEnum.class);
//}
@Override
public void serialize(IBaseEnum value, JsonGenerator gen, SerializerProvider provider) throws IOException {
//返回枚举对象值字符串
//gen.writeString(value.getValue().toString());
//返回枚举对象值
gen.writeObject(value.getValue());
//enum2Object(value, gen);
}
/**
* 把枚举转成对象
*/
private void enum2Object(IBaseEnum value, JsonGenerator gen) throws IOException {
gen.writeStartObject();
gen.writeFieldName(IBaseEnum.ID);
gen.writeObject(value.getValue());
gen.writeFieldName(IBaseEnum.NAME);
gen.writeString(value.getName());
gen.writeEndObject();
}
}
使用注解方式序列化枚举
使用@JsonValue注解加在需要序列化的字段上，可省略注册配置，只能显示对应的值，不可扩展，如需要扩展使用@JsonSerialize(using = BaseEnumSerializer.class)注解
package com.example.mpdemo.enums;
import com.example.mpdemo.common.IBaseEnum;
import com.example.mpdemo.config.BaseEnumSerializer;
import com.fasterxml.jackson.annotation.JsonValue;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
/**
* @from: fhadmin.cn
* @Date: 2021/8/17
* @Description: 是否删除
*/
//不使用全局配置可使用该注解
//@JsonSerialize(using = BaseEnumSerializer.class)
public enum DeleteEnum implements IBaseEnum
DELETE_YES(true,"已删除"),
DELETE_NO(false,"未删除");
//使用JsonValue注解可格式化显示值
@JsonValue
private final boolean id;
private final String name;
DeleteEnum(boolean id, String name) {
this.id = id;
this.name = name;
}
@Override
public Boolean getValue() {
return this.id;
}
@Override
public String getName() {
return this.name;
}
//使用JsonValue注解可注释掉toString
/*@Override
public String toString() {
//根据情况给前台数据展示deleted或descp
return String.valueOf(this.deleted);
}*/
}