Wie Springboot+AOP die Konvertierung des Zeitparameterformats implementiert

 org.springframework.boot spring-boot-starter-web   org.projectlombok lombok 1.18.20 compile   org.springframework spring-aspects 5.2.7.RELEASE   org.aspectj aspectjtools 1.9.5   aopalliance aopalliance 1.0   org.aspectj aspectjweaver 1.9.0   cglib cglib 3.3.0 

import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; /** * @Author: JCccc * @Date: 2022-4-11 18:45 * @Description: */ @Target({ElementType.METHOD, ElementType.FIELD}) @Retention(RetentionPolicy.RUNTIME) public @interface DateField { String oldPattern() default DateUtil.YYYY_MM_DD_HH_MM_SS; //新格式可以写默认也可以不写，如果业务比较固定，那么新时间格式和旧时间格式都可以固定写好 String newPattern() default ""; }

import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; /** * @Author: JCccc * @Date: 2022-4-11 18:44 * @Description: */ @Target({ElementType.METHOD}) @Retention(RetentionPolicy.RUNTIME) public @interface NeedDateFormatConvert { }

import com.jctest.dotestdemo.util.DateUtil; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Pointcut; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Component; import org.springframework.util.StringUtils; import java.lang.reflect.Field; import java.util.Objects; /** * @Author: JCccc * @Date: 2022-4-11 18:57 * @Description: */ @Aspect @Component public class DateFormatAspect { private static Logger log = LoggerFactory.getLogger(DateFormatAspect.class); @Pointcut("@annotation(com.jctest.dotestdemo.aop.dateFormat.NeedDateFormatConvert)") public void pointCut() { } @Around("pointCut()") public Object around(ProceedingJoinPoint joinPoint) throws Throwable { //转换 dateFormat(joinPoint); return joinPoint.proceed(); } public void dateFormat(ProceedingJoinPoint joinPoint) { Object[] objects = null; try { objects = joinPoint.getArgs(); if (objects.length != 0) { for (int i = 0; i < objects.length; i++) { //当前只支持判断对象类型参数 convertObject(objects[i]); } } } catch (Exception e) { e.printStackTrace(); throw new RuntimeException("参数异常"); } } /** * 转换对象里面的值 * * @param obj * @throws IllegalAccessException */ private void convertObject(Object obj) throws IllegalAccessException { if (Objects.isNull(obj)) { log.info("当前需要转换的object为null"); return; } Field[] fields = obj.getClass().getDeclaredFields(); for (Field field : fields) { boolean containFormatField = field.isAnnotationPresent(DateField.class); if (containFormatField) { //获取访问权 field.setAccessible(true); DateField annotation = field.getAnnotation(DateField.class); String oldPattern = annotation.oldPattern(); String newPattern = annotation.newPattern(); Object dateValue = field.get(obj); if (Objects.nonNull(dateValue) && StringUtils.hasLength(oldPattern) && StringUtils.hasLength(newPattern)) { String newDateValue = DateUtil.strFormatConvert(String.valueOf(dateValue), oldPattern, newPattern); if (Objects.isNull(newDateValue)){ log.info("当前需要转换的日期数据转换失败 dateValue = {}",dateValue.toString()); throw new RuntimeException("参数转换异常"); } field.set(obj, newDateValue); } } } } }

import lombok.extern.slf4j.Slf4j; import java.time.LocalDateTime; import java.time.format.DateTimeFormatter; /** * @Author: JCccc * @Date: 2022-4-1 14:48 * @Description: */ @Slf4j public class DateUtil { public static final String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss"; public static final String YYYY_MM_DD = "yyyy-MM-dd"; public static final String YYYY_MM = "yyyy-MM"; public static final String YYYY = "yyyy"; public static final String MM = "MM"; public static final String DD = "dd"; public static final String YYYYMMDDHHMMSS = "yyyyMMddHHmmss"; public static final String YYYYMMDD = "yyyyMMdd"; /** * 指定日期格式转换 * * @param dateStr * @param oldPattern * @return */ public static String strFormatConvert(String dateStr, String oldPattern,String newPattern) { try { DateTimeFormatter oldFormatter = DateTimeFormatter.ofPattern(oldPattern); DateTimeFormatter newFormatter = DateTimeFormatter.ofPattern(newPattern); return LocalDateTime.parse(dateStr, oldFormatter).format(newFormatter); } catch (Exception e) { log.error("strToDate is Exception. e:", e); return null; } } }

import com.jctest.dotestdemo.aop.dateFormat.DateField; import com.jctest.dotestdemo.util.DateUtil; import lombok.Data; import java.io.Serializable; /** * @Author: JCccc * @Date: 2022-4-1 14:48 * @Description: */ @Data public class UserQueryVO implements Serializable { /** * 开始时间 */ @DateField(oldPattern =DateUtil.YYYY_MM_DD_HH_MM_SS, newPattern = DateUtil.YYYY_MM_DD) private String startDate; /** * 结束时间 */ @DateField(oldPattern =DateUtil.YYYY_MM_DD_HH_MM_SS,newPattern = DateUtil.YYYY_MM_DD) private String endDate; }

import com.jctest.dotestdemo.aop.dateFormat.NeedDateFormatConvert; import com.jctest.dotestdemo.vo.UserQueryVO; import org.springframework.web.bind.annotation.*; /** * @Author: JCccc * @Date: 2022-4-18 11:52 * @Description: */ @RestController public class UserController { @NeedDateFormatConvert @PostMapping("/test") public String test( @RequestBody UserQueryVO userQueryVO){ System.out.println("时间格式转化完成："); System.out.println(userQueryVO.getStartDate()); System.out.println(userQueryVO.getEndDate()); return userQueryVO.toString(); } }