LocalDateTime时间格式化

1.引入jar
//防止dto改成locakdatetime报错

org.mybatis
mybatis-typehandlers-jsr310
1.0.2

//格式化数据

com.fasterxml.jackson.datatype
jackson-datatype-jsr310
2.9.2

2.(1)加注解
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")

（2）或者
@Bean
public ObjectMapper serializingObjectMapper() {
ObjectMapper objectMapper = new ObjectMapper();
JavaTimeModule javaTimeModule = new JavaTimeModule();
javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
objectMapper.registerModule(javaTimeModule);
return objectMapper;
}