Java 根据身份证计算实际年龄
一、流程图
下面是计算身份证对应实际年龄的流程图:
步骤 | 操作 |
---|---|
1 | 获取输入的身份证号码 |
2 | 解析身份证号码中的出生年月日 |
3 | 计算当前日期与出生日期的差值 |
4 | 根据差值计算实际年龄 |
二、实现步骤
1. 获取输入的身份证号码
首先,我们需要获取用户输入的身份证号码。在 Java 中,可以使用 Scanner 类来实现:
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("请输入身份证号码:");
String idCard = scanner.nextLine();
}
}
2. 解析身份证号码中的出生年月日
接下来,我们需要从身份证号码中提取出生年月日信息。可以使用正则表达式来匹配身份证号码格式:
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("请输入身份证号码:");
String idCard = scanner.nextLine();
// 正则表达式匹配身份证号码中的出生年月日
Pattern pattern = Pattern.compile("\\d{6}(\\d{4})(\\d{2})(\\d{2})\\d{4}");
Matcher matcher = pattern.matcher(idCard);
if (matcher.matches()) {
int year = Integer.parseInt(matcher.group(1));
int month = Integer.parseInt(matcher.group(2));
int day = Integer.parseInt(matcher.group(3));
}
}
}
3. 计算当前日期与出生日期的差值
现在,我们已经获取到了出生年月日信息,接下来计算当前日期与出生日期的差值:
import java.time.LocalDate;
import java.time.temporal.ChronoUnit;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("请输入身份证号码:");
String idCard = scanner.nextLine();
Pattern pattern = Pattern.compile("\\d{6}(\\d{4})(\\d{2})(\\d{2})\\d{4}");
Matcher matcher = pattern.matcher(idCard);
if (matcher.matches()) {
int year = Integer.parseInt(matcher.group(1));
int month = Integer.parseInt(matcher.group(2));
int day = Integer.parseInt(matcher.group(3));
LocalDate birthDate = LocalDate.of(year, month, day);
LocalDate currentDate = LocalDate.now();
long age = ChronoUnit.YEARS.between(birthDate, currentDate);
}
}
}
4. 根据差值计算实际年龄
最后,我们根据差值计算实际年龄并输出结果:
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("请输入身份证号码:");
String idCard = scanner.nextLine();
Pattern pattern = Pattern.compile("\\d{6}(\\d{4})(\\d{2})(\\d{2})\\d{4}");
Matcher matcher = pattern.matcher(idCard);
if (matcher.matches()) {
int year = Integer.parseInt(matcher.group(1));
int month = Integer.parseInt(matcher.group(2));
int day = Integer.parseInt(matcher.group(3));
LocalDate birthDate = LocalDate.of(year, month, day);
LocalDate currentDate = LocalDate.now();
long age = ChronoUnit.YEARS.between(birthDate, currentDate);
System.out.println("实际年龄为:" + age);
}
}
}
结论
通过以上步骤,我们可以实现根据身份证计算实际年龄的功能。希望这篇文章对你有所帮助,如果有任何疑问或需要进一步的指导,请随时与我联系。祝你学习顺利!