io.gitee.loulan_yxq.owner.json.tool.JsonToolObjectMapper Maven / Gradle / Ivy

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package io.gitee.loulan_yxq.owner.json.tool;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.DeserializationFeature;
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 java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;
import java.util.TimeZone;

/*********************************************************
 ** JSON工具的{@link ObjectMapper}对象配置类
 ** 


 ** Date: Created in 2022/1/20  14:11
 ** @author loulan
 ** @version 0.0.0
 *********************************************************/
abstract class JsonToolObjectMapper {
    protected final static ObjectMapper objectMapper = new ObjectMapper();

    /**
     * 静态块执行模块
     * @author     :loulan
     * */
    static {
        objectMapperConfiguration();
        objectMapperDateConfiguration();
    }

    /**
     * {@link ObjectMapper}对象的属性配置
     *
     * @author :loulan
     */
     static void objectMapperConfiguration() {
        // 属性为Null的不进行序列化，只对pojo起作用，可能对map和list不起作用
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        // json进行换行缩进等操作
        //objectMapper.enable(SerializationFeature.INDENT_OUTPUT);
        // json不进行换行缩进等操作  默认就是不进行操作，写了这行和没写的效果一样
        //objectMapper.disable(SerializationFeature.INDENT_OUTPUT);
        // json是否允许属性名没有引号 ，默认是false
        //objectMapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
        //json是否允许属性名为单引号 ，默认是false
        //objectMapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
        // 遇到未知属性是否抛出异常 ，默认是抛出异常的true
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        // 当实体类没有setter方法时，序列化不报错，返回一个空对象
        //objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
        // 所有的字母小写，下划线作为名字之间分隔符，例如 snake_case
        //objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.SNAKE_CASE);
        // 所有名字（包括第一个字符）都以大写字母开头，后跟小写字母，没有分隔符，例如 UpperCamelCase
        //objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.UPPER_CAMEL_CASE);
        // 第一个单词以小写字母开头，后续每个单词都是大写字母开头，没有分隔符，例如 lowerCamelCase
        //objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.LOWER_CAMEL_CASE);
        // 所有的字母小写，没有分隔符，例如 lowercase
        //objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.LOWER_CASE);
        // “Lisp” 风格，采用小写字母、连字符作为分隔符，例如 “lower-case” 或 “first-name”
        //objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.KEBAB_CASE);
    }

    /**
     * {@link ObjectMapper}对象的日期配置
     *
     * @author :loulan
     */
    private static void objectMapperDateConfiguration() {
        // 位置设置为中国
        objectMapper.setLocale(Locale.CHINESE);
        // 时区设置为亚洲上海（上海和北京是一个时区的，所以也是北京时间）
        objectMapper.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));

        objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        JavaTimeModule javaTimeModule = new JavaTimeModule();
        //日期序列化
        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")));

        //日期反序列化
        javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        //javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss")));
        //javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSXXX")));

        javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
        //javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern("yyyy/MM/dd")));

        javaTimeModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern("HH:mm:ss")));

        objectMapper.registerModule(javaTimeModule);
    }
}