自定义反序列化类将LocalDate时间格式转为 LocalDateTime

从前端接收数据反序列化成类,如果时间格式不一致可能会反序列化失败

public class StorageDTO implements Serializable {

    private static final long serialVersionUID = 1L;

	......
	//实体类中格式为
    @JsonFormat(pattern = "yyyy-MM-dd")
    @JsonDeserialize(using = CustomLocalDateTimeDeserializer.class)
    @ApiModelProperty("产生时间")
    private LocalDateTime generateTime;
    
}

//自定义反序列化类
package com......config;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;

import java.io.IOException;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class CustomLocalDateTimeDeserializer extends LocalDateTimeDeserializer {
    private static final long serialVersionUID = 1L;
    private static final DateTimeFormatter DEFAULT_FORMATTER = DateTimeFormatter.ISO_LOCAL_DATE_TIME;
    private CustomLocalDateTimeDeserializer() {
        super(DEFAULT_FORMATTER);
    }
    public CustomLocalDateTimeDeserializer(DateTimeFormatter formatter) {
        super(formatter);
    }

    @Override
    protected LocalDateTimeDeserializer withDateFormat(DateTimeFormatter formatter) {
        return new CustomLocalDateTimeDeserializer(formatter);
    }
    @Override
    public LocalDateTime deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JsonProcessingException {
        LocalDate localDate = new LocalDateDeserializer(_formatter).deserialize(p, ctxt);
        LocalDateTime localDateTime = localDate.atStartOfDay();
        return localDateTime;
    }
}

后端统一返回格式化后的日期

package com.......config;

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 com.......filters.ReHttpServletRequestFilter;
import com.......interceptor.DeviceHandlerInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.List;
import java.util.TimeZone;

/**
 * 通用配置
 *
 * @author balance
 */
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
    public static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";//默认日期时间格式
    public static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";//默认日期格式
    public static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";//默认时间格式
    @Autowired
    private DeviceHandlerInterceptor deviceHandlerInterceptor;

    /**
     * 自定义拦截规则
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(deviceHandlerInterceptor).addPathPatterns("/test/**").excludePathPatterns("/testPage/**");//设备端请求拦截器
    }

    @Bean
    public FilterRegistrationBean httpServletRequestReplacedRegistration() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new ReHttpServletRequestFilter());
        registration.addUrlPatterns("/*");
        registration.addInitParameter("paramName", "paramValue");
        registration.setName("reHttpServletRequestFilter");
        registration.setOrder(1);
        return registration;
    }

    /**
     * 跨域配置
     */
    @Bean
    public CorsFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        config.setAllowCredentials(true);
        // 设置访问源地址
        config.addAllowedOriginPattern("*");
        // 设置访问源请求头
        config.addAllowedHeader("*");
        // 设置访问源请求方法
        config.addAllowedMethod("*");
        // 有效期 1800秒
        config.setMaxAge(1800L);
        // 添加映射路径，拦截一切请求
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", config);
        // 返回新的CorsFilter
        return new CorsFilter(source);
    }

    /**
     * 配置全局localDateTime输出格式
     * @return
     */
    @Bean
    public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter() {
        MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); 忽略json字符串中不识别的属性
        objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);// 忽略无法转换的对象
        objectMapper.configure(SerializationFeature.INDENT_OUTPUT, true); // PrettyPrinter 格式化输出
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);// NULL不参与序列化
        objectMapper.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));// 指定时区
        objectMapper.setDateFormat(new SimpleDateFormat(DEFAULT_DATE_TIME_FORMAT)); // 日期类型字符串处理
        // java8日期处理
        JavaTimeModule javaTimeModule = new JavaTimeModule();
        //序列化规则
        javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)));
        javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)));
        javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));
        //反序列化规则
        javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)));
        javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)));
        javaTimeModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));
        objectMapper.registerModule(javaTimeModule);
        mappingJackson2HttpMessageConverter.setObjectMapper(objectMapper);
        return mappingJackson2HttpMessageConverter;
    }

    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.add(mappingJackson2HttpMessageConverter());
    }

}