chws/user-service/src/main/java/com/mh/user/config/MyJacksonConfig.java

package com.mh.user.config;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.mh.user.model.MyBigDecimalDeserializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.io.IOException;
import java.math.BigDecimal;

/**
 * @author LJF
 * @version 1.0
 * @project CHWS
 * @description 避免使用科学计数算法
 * @date 2026-01-07 14:37:11
 */
@Configuration
public class MyJacksonConfig {

    @Bean("customObjectMapper")
    public ObjectMapper customObjectMapper() {
        ObjectMapper mapper = new ObjectMapper();

        // 注册 JavaTimeModule
        mapper.registerModule(new JavaTimeModule());

        // 启用 BigDecimal 作为普通格式输出（避免科学计数法）
        mapper.enable(JsonGenerator.Feature.WRITE_BIGDECIMAL_AS_PLAIN);

        // 注册自定义反序列化器
        SimpleModule module = new SimpleModule();
        module.addDeserializer(BigDecimal.class, new MyBigDecimalDeserializer());
        mapper.registerModule(module);

        // 启用 BigDecimal 处理浮点数
        mapper.enable(DeserializationFeature.USE_BIG_DECIMAL_FOR_FLOATS);

        return mapper;
    }

}