1、使用正则判断是否日期(推荐:java视频教程)
public boolean isDate(String date) { /** * 判断日期格式和范围 */ String rexp = "^((\\d{2}(([02468][048])|([13579][26]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][1235679])|([13579][01345789]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))"; Pattern pat = Pattern.compile(rexp); Matcher mat = pat.matcher(date); boolean dateType = mat.matches(); return dateType; }
2、使用SimpleDateFormat类设置日期格式,然后通过抛出异常来判断
public boolean isValidDate(String str) { boolean convertSuccess = true; // 指定日期格式为四位年/两位月份/两位日期,注意yyyy/MM/dd区分大小写; //如果想判断格式为yyyy-MM-dd,需要写成-分隔符的形式 SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd HH:mm"); try { format.setLenient(false); format.parse(str); } catch (ParseException e) { // e.printStackTrace(); // 如果抛出ParseException或者NullPointerException,就说明格式不对 convertSuccess = false; } return convertSuccess; }
更多java知识请关注java基础教程栏目。
The above is the detailed content of Java method to determine whether it is a date (code attached). For more information, please follow other related articles on the PHP Chinese website!

The article discusses various Java garbage collection algorithms (Serial, Parallel, CMS, G1, ZGC), their performance impacts, and suitability for applications with large heaps.

The article discusses the Java Virtual Machine (JVM), detailing its role in running Java programs across different platforms. It explains the JVM's internal processes, key components, memory management, garbage collection, and performance optimizatio

Java's Nashorn engine enables JavaScript scripting within Java apps. Key steps include setting up Nashorn, managing scripts, and optimizing performance. Main issues involve security, memory management, and future compatibility due to Nashorn's deprec

Java's try-with-resources simplifies resource management by automatically closing resources like file streams or database connections, improving code readability and maintainability.

Java enums represent fixed sets of values, offering type safety, readability, and additional functionality through custom methods and constructors. They enhance code organization and can be used in switch statements for efficient value handling.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment