增加身份证获取年龄的功能

epmet-commons/epmet-commons-tools/src/main/java/com/epmet/commons/tools/validator/IdCardNoValidatorUtils.java

@@ -1,9 +1,11 @@
 package com.epmet.commons.tools.validator;
 
+import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.text.SimpleDateFormat;
+import java.time.LocalDate;
 import java.util.Calendar;
 import java.util.GregorianCalendar;
 import java.util.Hashtable;
@@ -199,5 +201,47 @@ public class IdCardNoValidatorUtils {
         return gender;
     }
 
+    /**
+     * 根据身份证号获取年龄
+     *
+     * @param IDCard 完整身份证号码
+     * @return java.lang.Integer
+     * @author work@yujt.net.cn
+     * @date 2019/9/20 14:26
+     */
+    public static Integer getAge(String IDCard) {
+        int age;
+        LocalDate now = LocalDate.now();
+        int nowYear = now.getYear();
+        int nowMonth = now.getMonthValue();
+        int cardYear = 0;
+        int cardMonth = 0;
+        if (StringUtils.isNotBlank(IDCard) && checkIsIdCardNo(IDCard)) {
+            if (IDCard.length() == 15) {
+                // 身份证上的年份(15位身份证为1980年前的)
+                String uyear = "19" + IDCard.substring(6, 8);
+                cardYear = Integer.parseInt(uyear);
+                // 身份证上的月份
+                String uyue = IDCard.substring(8, 10);
+                cardMonth = Integer.parseInt(uyue);
+            } else if (IDCard.length() == 18) {
+                // 身份证上的年份
+                String year = IDCard.substring(6).substring(0, 4);
+                cardYear = Integer.parseInt(year);
+                // 身份证上的月份
+                String yue = IDCard.substring(10).substring(0, 2);
+                cardMonth = Integer.parseInt(yue);
+            }
+        }
+        // 当前月份大于用户出身的月份表示已过生日
+        if (cardMonth <= nowMonth) {
+            age = nowYear - cardYear + 1;
+            // 当前用户还没过生
+        } else {
+            age = nowYear - cardYear;
+        }
+        return age;
+    }
+
 }