SpringBoot LocalDateTime日期转换

原创
2020/09/11 17:47
阅读数 1.3W

一、LocalDateTime日期转换两个问题

1.前端传入参数时String转换为Date

org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot 
deserialize value of type `java.time.LocalDateTime` from String "2020-02-11 12:48:13": Failed to 
deserialize java.time.LocalDateTime: (java.time.format.DateTimeParseException) Text '2020-02-11 
12:48:13' could not be parsed at index 10; nested exception is 
com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type 
`java.time.LocalDateTime` from String "2020-02-11 12:48:13": Failed to deserialize 
java.time.LocalDateTime: (java.time.format.DateTimeParseException) Text '2020-02-11 12:48:13' could 
not be parsed at index 10
 at [Source: (PushbackInputStream); line: 4, column: 19] (through reference chain: 
com.example.demo.model.Test["localDateTime"])

 

2.后台返回值时Date转换为String

LocalDateTime中间有个“T”,其他时间类型时间格式可读性也很差。

 

二、解决方案

编写一个时间配置类,使用HTTP消息转换器来格式化。

import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

/**
 * 时间统一配置
 */
@Configuration
public class DateConfig {

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jsonCustomizer() {
        JavaTimeModule module = new JavaTimeModule();
        module.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        module.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        return builder -> {
            builder.simpleDateFormat("yyyy-MM-dd hh:mm:ss");
            builder.deserializers(new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
            builder.serializers(new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd hh:mm:ss")));
            builder.modules(module);
        };
    }

}

 

三、验证效果

1.第一个问题解决效果图:

2.第二个问题解决效果图:

我们可以看到使用了HTTP消息转换器来格式化后,连Date类型也格式化正常了。

 

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