生日剩余天数计算Javaweb
时间: 2023-09-09 22:14:34 浏览: 86
好的,以下是一个简单的生日剩余天数计算的 JavaWeb 实现:
1. 首先,我们需要创建一个 JSP 页面,用于用户输入生日信息和展示剩余天数:
```jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>生日剩余天数计算</title>
</head>
<body>
<h1>生日剩余天数计算</h1>
<form action="calculate" method="POST">
<label>请输入您的生日:</label>
<input type="date" name="birthday" required><br>
<button type="submit">计算剩余天数</button>
</form>
<% if (request.getAttribute("remainingDays") != null) { %>
<p>距离您的生日还有 <%= request.getAttribute("remainingDays") %> 天!</p>
<% } %>
</body>
</html>
```
2. 接着,我们需要创建一个 Servlet,用于处理用户提交的生日信息并计算剩余天数:
```java
import java.io.IOException;
import java.time.LocalDate;
import java.time.Period;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/calculate")
public class CalculateRemainingDaysServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
LocalDate birthday = LocalDate.parse(request.getParameter("birthday"));
LocalDate today = LocalDate.now();
Period period = Period.between(today, birthday.withYear(today.getYear()));
int remainingDays = period.getDays();
if (remainingDays < 0) {
remainingDays += 365;
}
request.setAttribute("remainingDays", remainingDays);
request.getRequestDispatcher("/index.jsp").forward(request, response);
}
}
```
3. 最后,我们需要在 web.xml 文件中添加 Servlet 映射:
```xml
<web-app>
<servlet>
<servlet-name>CalculateRemainingDaysServlet</servlet-name>
<servlet-class>CalculateRemainingDaysServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>CalculateRemainingDaysServlet</servlet-name>
<url-pattern>/calculate</url-pattern>
</servlet-mapping>
</web-app>
```
现在,您可以部署该应用程序并访问该页面,输入您的生日,然后点击“计算剩余天数”按钮,即可计算出距离您的生日还有多少天。
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