随笔（八）『SpringBoot 解决ID和日期，前端显示不一致』

package com.baihua.common.config;

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;

import java.text.SimpleDateFormat;
import java.util.TimeZone;

/**
 * 1、解决Long型id，前端显示不一致
 * 2、解决数据库时间，前端显示不一致
 */
@Configuration
public class JacksonConfig {

    @Bean
    public MappingJackson2HttpMessageConverter jackson2HttpMessageConverter() {
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
        ObjectMapper mapper = new ObjectMapper();

        //日期格式转换
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        mapper.setTimeZone(TimeZone.getTimeZone("GMT+8"));

        //Long类型转String类型
        SimpleModule simpleModule = new SimpleModule();
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
        mapper.registerModule(simpleModule);

        converter.setObjectMapper(mapper);
        return converter;
    }
}