springboot统一日期格式（前端请求后台接收实体）+ 全局handler前日期统一处理、跨域配置

第一步：自定义类

import org.apache.commons.lang.StringUtils;
import org.springframework.core.convert.converter.Converter;
import org.springframework.stereotype.Component;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * 全局handler前日期统一处理
 * @author WBG
 * @date 2021/4/17
 */
@Component
public class DateConverterConfig implements Converter<String, Date> {

    private static final List<String> formarts = new ArrayList<>(4);

    private static final String YYYY_MM = "yyyy-MM";
    private static final String YYYY_MM_DD = "yyyy-MM-dd";
    private static final String YYYY_MM_DD_HH_MM = "yyyy-MM-dd HH:mm";
    private static final String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    static{
        formarts.add(YYYY_MM);
        formarts.add(YYYY_MM_DD);
        formarts.add(YYYY_MM_DD_HH_MM);
        formarts.add(YYYY_MM_DD_HH_MM_SS);
    }

    @Override
    public Date convert(String source) {
        if (StringUtils.isBlank(source)) {
            return null;
        }
        source = source.trim();
        if(source.matches("^\d{4}-\d{1,2}$")){
            return parseDate(source, formarts.get(0));
        }else if(source.matches("^\d{4}-\d{1,2}-\d{1,2}$")){
            return parseDate(source, formarts.get(1));
        }else if(source.matches("^\d{4}-\d{1,2}-\d{1,2} {1}\d{1,2}:\d{1,2}$")){
            return parseDate(source, formarts.get(2));
        }else if(source.matches("^\d{4}-\d{1,2}-\d{1,2} {1}\d{1,2}:\d{1,2}:\d{1,2}$")){
            return parseDate(source, formarts.get(3));
        }else {
            throw new IllegalArgumentException("Invalid false value '" + source + "'");
        }
    }

    /**
     * 格式化日期
     * @param dateStr String 字符型日期
     * @param format String 格式
     * @return Date 日期
     */
    private Date parseDate(String dateStr, String format) {
        Date date;
        try {
            DateFormat dateFormat = new SimpleDateFormat(format);
            date = dateFormat.parse(dateStr);
        } catch (Exception e) {
            throw new IllegalArgumentException(e.getLocalizedMessage());
        }
        return date;
    }

}

第二步：全局拦截

/**
 * 自定义拦截配置
 */
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

   
    /**
     * 添加自定义的Converters和Formatters.
     */
    @Override
    public void addFormatters(FormatterRegistry registry) {
        registry.addConverter(new DateConverterConfig());
    }

/**
     * 跨域配置
     */
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        /**
         * 可跨域全局配置
         */
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowCredentials(true)
                .allowedMethods("GET", "POST", "DELETE", "PUT")
                .allowedHeaders(SystemConstant.TOKEN)
                .maxAge(3600 * 24);
    }
}