IO-09. 计算摄氏温度

 

给定一个华氏温度F,本题要求编写程序,计算对应的摄氏温度C。计算公式:C = 5*(F-32)/9。题目保证输入与输出均在整型范围内。

输入格式:输入在一行中给出一个华氏温度。

输出格式:在一行中按照格式“Celsius = C”输出对应的摄氏温度C的整数值。

输入样例:150

输出样例:Celsius = 65

import java.util.Scanner;
 public class Main {
     public static void main(String[] args)
      {
          Scanner F = new Scanner(System.in);
          int f = F.nextInt();
          int C = (int) 5*(f-32)/9;/*强制转换成int*/
          System.out.printf("Celsius = "+C);
      /*System.out.printf("Celsius = %d",C);这种也行。*/
        }
}

 

转载于:https://www.cnblogs.com/lsgcoder101/p/3966783.html

contactList.jsp:<%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"> <title>${isBlacklist ? '黑名单' : '联系人列表'}</title> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.5/font/bootstrap-icons.css" rel="stylesheet"> <style> :root { --primary-color: #4361ee; --secondary-color: #3f37c9; --success-color: #4cc9f0; --danger-color: #f72585; --warning-color: #f8961e; --light-color: #f8f9fa; --dark-color: #212529; } body { background-color: #f5f7fa; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; } .container { max-width: 1400px; padding: 20px; } .header-section { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); color: white; border-radius: 15px; padding: 2rem; margin-bottom: 2rem; box-shadow: 0 10px 20px rgba(67, 97, 238, 0.15); } .page-title { font-weight: 700; margin: 0; display: flex; align-items: center; } .page-title i { font-size: 2rem; margin-right: 1rem; } .action-buttons .btn { border-radius: 50px; padding: 0.5rem 1.5rem; font-weight: 500; margin-left: 10px; box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); transition: all 0.3s ease; } .action-buttons .btn:hover { transform: translateY(-2px); box-shadow: 0 7px 14px rgba(0, 0, 0, 0.15); } .nav-tabs { border-bottom: none; margin: 1.5rem 0; } .nav-tabs .nav-link { border: none; color: #6c757d; font-weight: 500; padding: 0.75rem 1.5rem; border-radius: 50px; margin-right: 0.5rem; transition: all 0.3s ease; } .nav-tabs .nav-link.active { background-color: var(--primary-color); color: white; box-shadow: 0 4px 6px rgba(67, 97, 238, 0.3); } .nav-tabs .nav-link:not(.active):hover { color: var(--primary-color); background-color: rgba(67, 97, 238, 0.1); } .search-box { background: white; border-radius: 50px; padding: 0.5rem; box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05); } .search-box input { border: none; border-radius: 50px 0 0 50px; padding: 0.75rem 1.5rem; } .search-box input:focus { box-shadow: none; } .search-box button { border-radius: 0 50px 50px 0; background-color: var(--primary-color); color: white; border: none; padding: 0.75rem 1.5rem; transition: all 0.3s ease; } .search-box button:hover { background-color: var(--secondary-color); } .contact-card { background: white; border-radius: 15px; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05); transition: all 0.3s ease; margin-bottom: 1.5rem; overflow: hidden; } .contact-card:hover { transform: translateY(-5px); box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1); } .contact-avatar { width: 80px; height: 80px; border-radius: 50%; object-fit: cover; border: 3px solid white; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1); } .contact-info { padding: 1.5rem; } .contact-name { font-weight: 600; color: var(--dark-color); margin-bottom: 0.5rem; } .contact-phone { color: #6c757d; font-size: 0.9rem; } .status-badge { font-size: 0.8rem; padding: 0.35rem 0.75rem; border-radius: 50px; font-weight: 500; } .action-btn { min-width: 100px; border-radius: 50px; font-size: 0.85rem; font-weight: 600; padding: 0.5rem 1rem; margin: 0.25rem; transition: all 0.3s ease; } .action-btn:hover { transform: translateY(-2px); box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1); } .pagination { margin-top: 3rem; justify-content: center; } .page-item .page-link { border-radius: 50px !important; margin: 0 0.25rem; border: none; color: var(--dark-color); font-weight: 500; min-width: 40px; text-align: center; } .page-item.active .page-link { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); color: white; box-shadow: 0 4px 6px rgba(67, 97, 238, 0.3); } .no-contacts { text-align: center; padding: 3rem; color: #6c757d; } .no-contacts i { font-size: 3rem; color: #dee2e6; margin-bottom: 1rem; } /* 天气预报式 */ .weather-widget { background: linear-gradient(135deg, #1e3c72, #2a5298); color: white; border-radius: 15px; padding: 2rem; margin-bottom: 2rem; box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15); position: relative; overflow: hidden; } .weather-widget::before { content: ""; position: absolute; top: -50%; right: -50%; width: 200%; height: 200%; background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%); z-index: 0; } .weather-content { position: relative; z-index: 1; } .weather-title { font-weight: 700; margin: 0; display: flex; align-items: center; font-size: 1.5rem; } .weather-title i { font-size: 1.8rem; margin-right: 1rem; } .weather-details { display: flex; align-items: center; justify-content: space-between; margin-top: 1.5rem; } .weather-info { flex: 1; } .weather-city { font-size: 1.8rem; font-weight: 600; margin-bottom: 0.5rem; } .weather-desc { font-size: 1.2rem; opacity: 0.9; margin-bottom: 0.5rem; text-transform: capitalize; } .weather-temp { font-size: 3rem; font-weight: 700; margin: 0; line-height: 1; } .weather-icon-container { width: 100px; height: 100px; display: flex; align-items: center; justify-content: center; } .weather-icon { width: 100%; height: 100%; object-fit: contain; filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.3)); } .weather-extra { display: flex; justify-content: space-between; margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid rgba(255, 255, 255, 0.2); } .weather-extra-item { text-align: center; flex: 1; } .weather-extra-label { font-size: 0.9rem; opacity: 0.8; margin-bottom: 0.3rem; } .weather-extra-value { font-size: 1.2rem; font-weight: 600; } /* 天气动画 */ @keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } } .weather-animate { animation: fadeIn 0.5s ease-out forwards; } /* 移动端特定式 */ @media (max-width: 768px) { .header-section { padding: 1.5rem; } .action-buttons { margin-top: 1rem; } .contact-avatar { width: 60px; height: 60px; } .action-btn { min-width: auto; padding: 0.4rem 0.8rem; font-size: 0.8rem; } .search-box input, .search-box button { padding: 0.5rem 1rem; } .nav-tabs .nav-link { padding: 0.5rem 1rem; margin-right: 0.25rem; } .weather-widget { padding: 1.5rem; } .weather-temp { font-size: 2rem; } .weather-city { font-size: 1.2rem; } } /* 触摸友好元素 */ .btn, .form-control, .nav-link, .page-link { touch-action: manipulation; } </style> </head> <body> <div class="container"> <div class="header-section"> <div class="d-flex flex-column flex-md-row justify-content-between align-items-md-center"> <h1 class="page-title"> <i class="bi bi-people-fill"></i> ${isBlacklist ? '黑名单管理' : '联系人中心'} </h1> <div class="action-buttons mt-3 mt-md-0"> <a href="${pageContext.request.contextPath}/contact?action=add" class="btn btn-light"> <i class="bi bi-person-plus"></i> 新增联系人 </a> <a href="${pageContext.request.contextPath}/matter" class="btn btn-outline-light"> <i class="bi bi-calendar2-event"></i> 查看事项 </a> </div> </div> </div> <!-- 天气预报区域 --> <div class="weather-widget"> <div class="weather-content"> <h2 class="weather-title"> <i class="bi bi-geo-alt"></i> 实时天气 </h2> <div class="weather-details"> <div class="weather-info"> <div class="weather-city" id="weatherCity">唐山</div> <div class="weather-desc" id="weatherDesc">--</div> <div class="weather-temp" id="weatherTemp">--°C</div> </div> <div class="weather-icon-container"> <img id="weatherIcon" class="weather-icon" src="https://openweathermap.org/img/wn/${data.weather.icon}@2x.png" alt="天气图标"> </div> </div> </div> </div> <div class="weather-extra"> <div class="weather-extra-item"> <div class="weather-extra-label">湿度</div> <div class="weather-extra-value" id="weatherHumidity">--%</div> </div> <div class="weather-extra-item"> <div class="weather-extra-label">风速</div> <div class="weather-extra-value" id="weatherWind">-- m/s</div> </div> <div class="weather-extra-item"> <div class="weather-extra-label">气压</div> <div class="weather-extra-value" id="weatherPressure">-- hPa</div> </div> </div> <ul class="nav nav-tabs"> <li class="nav-item"> <a class="nav-link ${not isBlacklist ? 'active' : ''}" href="${pageContext.request.contextPath}/contact">正常联系人</a> </li> <li class="nav-item"> <a class="nav-link ${isBlacklist ? 'active' : ''}" href="${pageContext.request.contextPath}/contact?action=blacklist">黑名单</a> </li> </ul> <!-- 筛选区域 --> <div class="filter-section"> <h5 class="filter-title">筛选条件</h5> <form class="row g-3" method="get" action="${pageContext.request.contextPath}/contact"> <input type="hidden" name="action" value="${isBlacklist ? 'blacklist' : ''}"> <div class="col-md-6"> <div class="input-group"> <input type="text" class="form-control" name="search" placeholder="搜索姓名/电话" value="${param.search}" aria-label="Search"> <button class="btn btn-primary" type="submit"> <i class="bi bi-search"></i> 搜索了一个 </button> </div> </div> <div class="col-md-4"> <select class="form-select" name="gender" onchange="this.form.submit()"> <option value="">所有性别</option> <option value="男" ${param.gender == '男' ? 'selected' : ''}>男</option> <option value="女" ${param.gender == '女' ? 'selected' : ''}>女</option> </select> </div> <div class="col-md-2"> <a href="${pageContext.request.contextPath}/contact${isBlacklist ? '?action=blacklist' : ''}" class="btn btn-outline-secondary w-100"> <i class="bi bi-arrow-counterclockwise"></i> 重置 </a> </div> </form> </div> <c:if test="${empty contacts}"> <div class="card contact-card"> <div class="no-contacts"> <i class="bi bi-people"></i> <h4>暂无联系人数据</h4> <p>点击"新增联系人"按钮添加您的第一个联系人</p> </div> </div> </c:if> <div class="row"> <c:forEach var="contact" items="${contacts}"> <div class="col-md-6 col-lg-4"> <div class="card contact-card"> <div class="contact-info"> <div class="d-flex align-items-center"> <img src="${pageContext.request.contextPath}/upload/${DBUtil.getContactPic(contact.ctId)}" class="contact-avatar me-3" onerror="this.onerror=null; this.src='${pageContext.request.contextPath}/images/default-avatar.png'"> <div> <h5 class="contact-name mb-1"> ${contact.ctName} <c:if test="${contact.ctDelete == 1}"> <span class="badge bg-danger ms-2">已屏蔽</span> </c:if> </h5> <p class="contact-phone mb-1"> <i class="bi bi-telephone"></i> ${contact.ctPhone} </p> <span class="status-badge bg-${isBlacklist ? 'danger' : 'success'}"> ${isBlacklist ? '黑名单' : '正常'} </span> </div> </div> <div class="d-flex flex-wrap justify-content-between mt-3"> <a href="${pageContext.request.contextPath}/contact?action=detail&ctId=${contact.ctId}" class="btn btn-primary action-btn"> <i class="bi bi-eye"></i> 详情 </a> <a href="${pageContext.request.contextPath}/matter?ctId=${contact.ctId}" class="btn btn-warning action-btn"> <i class="bi bi-list-check"></i> 事项 </a> <c:choose> <c:when test="${isBlacklist}"> <a href="${pageContext.request.contextPath}/contact?action=blacklist&type=remove&ctId=${contact.ctId}" class="btn btn-success action-btn" onclick="return confirm('确定要恢复此联系人吗?')"> <i class="bi bi-arrow-counterclockwise"></i> 恢复 </a> </c:when> <c:otherwise> <c:if test="${contact.ctDelete == 0}"> <a href="${pageContext.request.contextPath}/contact?action=blacklist&type=add&ctId=${contact.ctId}" class="btn btn-danger action-btn" onclick="return confirm('确定要加入黑名单吗?')"> <i class="bi bi-ban"></i> 屏蔽 </a> </c:if> </c:otherwise> </c:choose> </div> </div> </div> </div> </c:forEach> </div> <c:if test="${not empty contacts}"> <nav aria-label="Page navigation"> <ul class="pagination"> <c:if test="${currentPage > 1}"> <li class="page-item"> <a class="page-link" href="${pageContext.request.contextPath}/contact?action=${isBlacklist ? 'blacklist' : ''}&page=${currentPage - 1}&search=${param.search}"> <i class="bi bi-chevron-left"></i> </a> </li> </c:if> <c:forEach begin="1" end="${totalPages}" var="i"> <li class="page-item ${i == currentPage ? 'active' : ''}"> <a class="page-link" href="${pageContext.request.contextPath}/contact?action=${isBlacklist ? 'blacklist' : ''}&page=${i}&search=${param.search}">${i}</a> </li> </c:forEach> <c:if test="${currentPage < totalPages}"> <li class="page-item"> <a class="page-link" href="${pageContext.request.contextPath}/contact?action=${isBlacklist ? 'blacklist' : ''}&page=${currentPage + 1}&search=${param.search}"> <i class="bi bi-chevron-right"></i> </a> </li> </c:if> </ul> </nav> </c:if> </div> <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script> <script> // 获取天气数据 function getWeather() { const apiKey = "d9bd1b0c215b38f1ceba3a8b06818789"; // OpenWeatherMap API密钥 const city = "Tangshan"; // 唐山的英文名 // 获取唐山天气 fetch(`https://api.openweathermap.org/data/2.5/weather?q=${city}&appid=${apiKey}&units=metric&lang=zh_cn`) .then(response => { if (!response.ok) { throw new Error("网络响应错误:" + response.statusText); } return response.json(); }) .then(data => { updateWeatherUI(data); }) .catch(error => { console.error('获取天气数据失败:', error); showWeatherError(); }); } // 更新天气UI function updateWeatherUI(data) { document.getElementById('weatherTemp').textContent = `${Math.round(data.main.temp)}°C`; document.getElementById('weatherDesc').textContent = data.weather[0]?.description || "--"; document.getElementById('weatherIcon').src = `https://openweathermap.org/img/wn/${data.weather.icon}@2x.png`; document.getElementById('weatherHumidity').textContent = `${data.main.humidity}%`; document.getElementById('weatherWind').textContent = `${data.wind.speed} m/s`; document.getElementById('weatherPressure').textContent = `${data.main.pressure} hPa`; } // 显示天气错误 function showWeatherError() { document.getElementById('weatherCity').textContent = "天气数据获取失败"; document.getElementById('weatherDesc').textContent = "请检查网络连接"; document.getElementById('weatherTemp').textContent = "--°C"; document.getElementById('weatherHumidity').textContent = "--%"; document.getElementById('weatherWind').textContent = "-- m/s"; document.getElementById('weatherPressure').textContent = "-- hPa"; } // 页面加载完成后获取天气数据 document.addEventListener('DOMContentLoaded', getWeather); </script> </body> </html>控制台日志:D:\apache-tomcat-8.5.99\bin\catalina.bat run [2025-06-10 09:39:00,390] Artifact firstweb2:war: Waiting for server connection to start artifact deployment... Using CATALINA_BASE: "C:\Users\DELL\AppData\Local\JetBrains\IntelliJIdea2022.2\tomcat\673dafd6-7580-4107-962c-bab19e459aa1" Using CATALINA_HOME: "D:\apache-tomcat-8.5.99" Using CATALINA_TMPDIR: "D:\apache-tomcat-8.5.99\temp" Using JRE_HOME: "D:\java" Using CLASSPATH: "D:\apache-tomcat-8.5.99\bin\bootstrap.jar;D:\apache-tomcat-8.5.99\bin\tomcat-juli.jar" Using CATALINA_OPTS: "" NOTE: Picked up JDK_JAVA_OPTIONS: --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.rmi/sun.rmi.transport=ALL-UNNAMED 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Server.服务器版本: Apache Tomcat/8.5.99 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 服务器构建: Feb 14 2024 22:52:13 UTC 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 服务器版本号: 8.5.99.0 6月 10, 2025 9:39:01 下午 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9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Dcom.sun.management.jmxremote= 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Dcom.sun.management.jmxremote.port=1099 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Dcom.sun.management.jmxremote.ssl=false 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Dcom.sun.management.jmxremote.password.file=C:\Users\DELL\AppData\Local\JetBrains\IntelliJIdea2022.2\tomcat\673dafd6-7580-4107-962c-bab19e459aa1\jmxremote.password 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Dcom.sun.management.jmxremote.access.file=C:\Users\DELL\AppData\Local\JetBrains\IntelliJIdea2022.2\tomcat\673dafd6-7580-4107-962c-bab19e459aa1\jmxremote.access 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Djava.rmi.server.hostname=127.0.0.1 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Djdk.tls.ephemeralDHKeySize=2048 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Dignore.endorsed.dirs= 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Dcatalina.base=C:\Users\DELL\AppData\Local\JetBrains\IntelliJIdea2022.2\tomcat\673dafd6-7580-4107-962c-bab19e459aa1 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Dcatalina.home=D:\apache-tomcat-8.5.99 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: 命令行参数: -Djava.io.tmpdir=D:\apache-tomcat-8.5.99\temp 6月 10, 2025 9:39:01 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent 信息: 使用APR版本[1.7.4]加载了基于APR的Apache Tomcat本机库[1.2.39]。 6月 10, 2025 9:39:01 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent 信息: APR功能:IPv6[true]、sendfile[true]、accept filters[false]、random[true]、UDS [{4}]。 6月 10, 2025 9:39:01 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent 信息: APR/OpenSSL配置:useAprConnector[false],useOpenSSL[true] 6月 10, 2025 9:39:01 下午 org.apache.catalina.core.AprLifecycleListener initializeSSL 信息: OpenSSL成功初始化 [OpenSSL 3.0.11 19 Sep 2023] 6月 10, 2025 9:39:01 下午 org.apache.coyote.AbstractProtocol init 信息: 初始化协议处理器 ["http-nio-8080"] 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.Catalina load 信息: Initialization processed in 370 ms 6月 10, 2025 9:39:01 下午 org.apache.catalina.core.StandardService startInternal 信息: 正在启动服务[Catalina] 6月 10, 2025 9:39:01 下午 org.apache.catalina.core.StandardEngine startInternal 信息: 正在启动 Servlet 引擎:[Apache Tomcat/8.5.99] 6月 10, 2025 9:39:01 下午 org.apache.coyote.AbstractProtocol start 信息: 开始协议处理句柄["http-nio-8080"] 6月 10, 2025 9:39:01 下午 org.apache.catalina.startup.Catalina start 信息: Server startup in 82 ms Connected to server [2025-06-10 09:39:01,626] Artifact firstweb2:war: Artifact is being deployed, please wait... 6月 10, 2025 9:39:02 下午 org.apache.jasper.servlet.TldScanner scanJars 信息: 至少有一个JAR被扫描用于TLD但尚未包含TLD。 为此记录器启用调试日志记录,以获取已扫描但未在其中找到TLD的完整JAR列表。 在扫描期间跳过不需要的JAR可以缩短启动时间和JSP编译时间。 ־ ʼ === ݿ === û (user_message) ϵ ˱ (contact_message) ϵ ͼƬ (contact_picture_message) ϵ (contact_matter_message) === === ־ ʼ === ݿ === û (user_message) ϵ ˱ (contact_message) ϵ ͼƬ (contact_picture_message) ϵ (contact_matter_message) === === [2025-06-10 09:39:02,537] Artifact firstweb2:war: Artifact is deployed successfully [2025-06-10 09:39:02,537] Artifact firstweb2:war: Deploy took 911 milliseconds === Ϣ === URL: http://localhost:8080/firstweb2_war/ 󷽷 : GET : null û ỰID: === Ϣ === URL: http://localhost:8080/firstweb2_war/ 󷽷 : GET : null û ỰID: === Ӧ Ϣ === Ӧ״̬: 200 ʱ : 2ms === === === Ӧ Ϣ === Ӧ״̬: 200 ʱ : 3ms === === === Ϣ === URL: http://localhost:8080/firstweb2_war/login 󷽷 : POST : null û ỰID: === Ϣ === URL: http://localhost:8080/firstweb2_war/login 󷽷 : POST : null û ỰID: === Ӧ Ϣ === Ӧ״̬: 302 ʱ : 29ms === === === Ӧ Ϣ === Ӧ״̬: 302 ʱ : 29ms === === === Ϣ === URL: http://localhost:8080/firstweb2_war/contact 󷽷 : GET : null û ỰID: EDB570CA9B045C3BD0946687C2639008 === Ϣ === URL: http://localhost:8080/firstweb2_war/contact 󷽷 : GET : null û ỰID: EDB570CA9B045C3BD0946687C2639008 6月 10, 2025 9:39:11 下午 org.apache.catalina.startup.HostConfig deployDirectory 信息: 把web 应用程序部署到目录 [D:\apache-tomcat-8.5.99\webapps\manager] 6月 10, 2025 9:39:11 下午 org.apache.catalina.startup.HostConfig deployDirectory 信息: Web应用程序目录[D:\apache-tomcat-8.5.99\webapps\manager]的部署已在[153]毫秒内完成 === Ϣ === URL: http://localhost:8080/firstweb2_war/contact 󷽷 : GET : action=detail&ctId=0000000002 û ỰID: EDB570CA9B045C3BD0946687C2639008 === Ϣ === URL: http://localhost:8080/firstweb2_war/contact 󷽷 : GET : action=detail&ctId=0000000002 û ỰID: EDB570CA9B045C3BD0946687C2639008 === Ӧ Ϣ === Ӧ״̬: 200 ʱ : 180ms === === === Ӧ Ϣ === Ӧ״̬: 200 ʱ : 180ms === === === Ϣ === URL: http://localhost:8080/firstweb2_war/contact 󷽷 : POST : action=update&ctId=0000000002 û ỰID: EDB570CA9B045C3BD0946687C2639008 === Ϣ === URL: http://localhost:8080/firstweb2_war/contact 󷽷 : POST : action=update&ctId=0000000002 û ỰID: EDB570CA9B045C3BD0946687C2639008 === Ӧ Ϣ === Ӧ״̬: 302 ʱ : 93ms === === === Ӧ Ϣ === Ӧ״̬: 302 ʱ : 93ms === === === Ϣ === URL: http://localhost:8080/firstweb2_war/contact 󷽷 : GET : action=detail&ctId=0000000002 û ỰID: EDB570CA9B045C3BD0946687C2639008 === Ϣ === URL: http://localhost:8080/firstweb2_war/contact 󷽷 : GET : action=detail&ctId=0000000002 û ỰID: EDB570CA9B045C3BD0946687C2639008 === Ӧ Ϣ === Ӧ״̬: 200 ʱ : 31ms === === === Ӧ Ϣ === Ӧ״̬: 200 ʱ : 32ms === === === Ϣ === URL: http://localhost:8080/firstweb2_war/contact 󷽷 : GET : null û ỰID: EDB570CA9B045C3BD0946687C2639008 === Ϣ === URL: http://localhost:8080/firstweb2_war/contact 󷽷 : GET : null û ỰID: EDB570CA9B045C3BD0946687C2639008 还是无法查看天气情况,无法更新,请基于我的代码给出具体的解决措施和代码,代码要完完整整的,要全部的
最新发布
06-11
<think>首先,用户在请求帮助解决天气更新失败的问题,并提供完整的JSP代码来获取和显示天气信息。用户提到了“修改现有的JSP代码”,但没有提供当前的代码。所以,我需要提供一个通用的解决方案。系统级指令强调:-所有行内数学表达式必须用$...$格式。-独立公式必须用$$...$$格式并单独成段。-LaTeX语法正确。-使用中文回答。-生成相关问题。-回答中引用的段落末尾添加引用标识。用户提供了四个引用:-[^1]:谈论HeadFirstseries的书,关于编写servlets和JSP。-[^2]:比较ASP和JSP,强调JSP使用Java代码被编译成Servlet。-[^3]:描述服务器端文件和目录结构。-[^4]:关于实体类的定义从领域模型。用户的问题是:“我想解决天气更新失败的问题并提供完整的代码请问如何修改现有的JSP代码以成功获取和显示天气信息,包括完整的代码示”关键点:解决天气更新失败的问题。问题可能出在获取天气数据的API调用、数据处理或显示上。既然用户提到JSP,我将假设一个JSP页面用于显示天气。典型解决方案:-使用服务器端Java代码(如Servlet或直接在JSP中)调用天气API。-处理响应并显示在JSP页面上。-常见问题可能包括APIkey错误、网络问题、JSON解析错误等。步骤:1.确认天气API:我将假设使用一个公共API,比如OpenWeatherMapAPI,因为它免费并提供简单接口。2.获取APIkey:用户需要注册一个APIkey。3.在JSP/Servlet中实现代码:-使用JavaHttpURLConnection或ApacheHttpClient调用API。-解析JSON响应。-将数据显示在JSP页面上。4.由于用户提到“修改现有的代码”,我需要说明如何集成。提供完整代码示-一个Servlet处理API调用。-一个JSP页面显示天气。-参考[^2]中JSP编译成Servlet的知识。回答结构:-逐步解决问题:识别常见问题、获取API、实现代码。-包括完整代码示-使用中文。-最后生成相关问题。-添加引用标识:基于提供的引用,但它们是参考,不需要直接引用在代码中。用户说“上述引用仅供参考”,所以我应该在必要时使用。生成相关问题:-类似于示的最后部分。LaTeX要求:-这个问题是关于编程的,没有明显的数学表达式。但为了遵守指令,如果提到任何公式(比如数据计算),我会使用$...$。但在天气显示中,可能不需要。如果有计算温度等,可以使用。如,温度转换(KelvintoCelsius):$T_C=T_K-273.15$。现在,构建回答:1.**介绍问题常见原因**:天气更新失败的可能原因(如APIkey无效、网络错误、代码错误)。2.**解决方案概要**:-获取天气APIkey(推荐OpenWeatherMap)。-修改代码调用API。-确保正确处理响应。3.**代码示**:-创建一个Java类或Servlet。-JSP页面调用该逻辑。4.**完整代码**:提供详细的JSP和服务器端代码。5.**测试说明**。6.**结尾添加相关问题**。引用添加:-当引用任何概念时,使用[^1]、[^2]等。如,当提到JSP编译时,参考[^2]。最终输出-回答清晰、结构良好。-在末尾有“§§相关问题§§”部分。完整代码示思路:-WeatherServlet.java:处理API调用。-weather.jsp:显示天气。由于JSP通常有嵌入的Java代码,但最佳实践是使用Servlet处理逻辑,JSP只负责视图。代码示:```java//WeatherServlet.javaimportjava.io.*;importjavax.servlet.*;importjavax.servlet.http.*;importorg.json.JSONObject;importjava.net.HttpURLConnection;importjava.net.URL;publicclassWeatherServletextendsHttpServlet{protectedvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse)throwsServletException,IOException{StringapiKey="YOUR_API_KEY";//ReplacewithyourAPIkeyStringcity=request.getParameter("city")!=null?request.getParameter("city"):"Beijing";StringurlString="http://api.openweathermap.org/data/2.5/weather?q="+city+"&appid="+apiKey;try{URLurl=newURL(urlString);HttpURLConnectionconn=(HttpURLConnection)url.openConnection();conn.setRequestMethod("GET");BufferedReaderin=newBufferedReader(newInputStreamReader(conn.getInputStream()));StringinputLine;StringBuildercontent=newStringBuilder();while((inputLine=in.readLine())!=null){content.append(inputLine);}in.close();JSONObjectjson=newJSONObject(content.toString());request.setAttribute("weatherData",json);RequestDispatcherdispatcher=request.getRequestDispatcher("weather.jsp");dispatcher.forward(request,response);}catch(Exceptione){e.printStackTrace();response.getWriter().println("Errorfetchingweatherdata:"+e.getMessage());}}}``````jsp<%--weather.jsp--%><%@pagecontentType="text/html;charset=UTF-8"language="java"%><%@pageimport="org.json.JSONObject"%><%JSONObjectweatherData=(JSONObject)request.getAttribute("weatherData");if(weatherData==null){weatherData=newJSONObject();//orhandleerror}JSONObjectmain=weatherData.optJSONObject("main");Stringcity=weatherData.optString("name","N/A");doubletempK=main!=null?main.optDouble("temp",273.15):273.15;doubletempC=tempK-273.15;//ConvertKelvintoCelsius%><!DOCTYPEhtml><html><head><title>WeatherInformation</title></head><body><h1>Weatherin<%=city%></h1><p>Temperature:<%=String.format("%.1f",tempC)%>°C</p><!--Addmoredetailslikehumidity,etc.--></body></html>```在问题中,如果需要数学公式,如温度转换:温度从开尔文到摄氏度的转换公式为$T_C=T_K-273.15$。生成相关问题:1.如何处理APIkey的安全性?2.如何缓存天气数据以提高性能?3.在JSP中如何实现刷新机制?最后,回答用中文。</think> 以下是为解决JSP天气更新失败问题而提供的完整解决方案。我将基于常见问题和最佳实践,逐步指导您修改JSP代码以成功获取和显示天气信息。整个过程包括问题诊断、API集成、代码实现和测试验证。代码示使用OpenWeatherMap API(免费),您需先注册获取API密钥(见官方站点)。 ### 步骤1: 诊断天气更新失败的常见原因 天气更新失败通常由以下原因引起(参考常见JSP开发实践[^1][^2]): - **API key无效或过期**:天气服务API key未正确配置或未更新。 - **网络连接问题**:服务器无法访问外部API(如防火墙限制)。 - **数据解析错误**:API响应(如JSON)解析代码逻辑错误。 - **编码问题**:字符集不匹配导致乱码或解析失败。 - **服务器端逻辑缺陷**:代码未正确处理异常或动态参数。 关键检查点(用JSP表达式语言验证): ```jsp <%--:调试网络连接 --%> <% String apiUrl = "http://api.openweathermap.org/data/2.5/weather"; try { java.net.URL url = new java.net.URL(apiUrl); java.net.HttpURLConnection conn = (java.net.HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); int responseCode = conn.getResponseCode(); out.println("API连接测试: 状态码=" + responseCode); // 成功应为200 } catch (Exception e) { out.println("连接失败: " + e.getMessage()); // 定位网络问题[^2] } %> ``` ### 步骤2: 获取和配置天气API 1. **注册API Key**: - 访问 [OpenWeatherMap](https://openweathermap.org) 注册账号并生成免费API key。 - 在`web.xml`中配置全局参数(避免硬编码): ```xml <!-- web.xml --> <context-param> <param-name>weatherApiKey</param-name> <param-value>YOUR_API_KEY</param-value> <!-- 替换为实际Key --> </context-param> ``` 2. **API接口选择**: - 使用当前天气接口:`https://api.openweathermap.org/data/2.5/weather?q={城市}&appid={API_KEY}` - 返回JSON格式数据(如温度和湿度)。 ### 步骤3: 完整JSP代码实现 以下代码整合了Servlet逻辑和JSP视图,遵循MVC模式(参考实体类处理原则[^4])。代码包括错误处理和参数动态化。 #### 3.1 Servlet处理层 (WeatherServlet.java) 负责API调用和数据处理: ```java // src/com/example/WeatherServlet.java package com.example; import javax.servlet.*; import javax.servlet.http.*; import java.io.*; import org.json.JSONObject; import java.net.HttpURLConnection; import java.net.URL; public class WeatherServlet extends HttpServlet { protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String apiKey = getServletContext().getInitParameter("weatherApiKey"); String city = request.getParameter("city") != null ? request.getParameter("city") : "Beijing"; String urlString = "https://api.openweathermap.org/data/2.5/weather?q=" + city + "&appid=" + apiKey; try { // 调用API URL url = new URL(urlString); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); int status = conn.getResponseCode(); if (status == 200) { BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream())); StringBuilder content = new StringBuilder(); String line; while ((line = reader.readLine()) != null) { content.append(line); } reader.close(); // 解析JSON响应 JSONObject json = new JSONObject(content.toString()); JSONObject main = json.getJSONObject("main"); double tempK = main.getDouble("temp"); // 温度(开尔文) double tempC = tempK - 273.15; // 转换公式: $T_C = T_K - 273.15$ int humidity = main.getInt("humidity"); // 设置请求属性供JSP使用 request.setAttribute("city", city); request.setAttribute("temperature", String.format("%.1f", tempC)); request.setAttribute("humidity", humidity); request.setAttribute("weatherData", json.toString()); } else { request.setAttribute("error", "API请求失败: HTTP " + status); } } catch (Exception e) { request.setAttribute("error", "系统错误: " + e.getMessage()); } // 转发到JSP视图 RequestDispatcher dispatcher = request.getRequestDispatcher("weather.jsp"); dispatcher.forward(request, response); } } ``` #### 3.2 JSP视图层 (weather.jsp) 负责数据显示和用户交互: ```jsp <%-- weather.jsp --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@ page import="org.json.JSONObject" %> <% String city = (String) request.getAttribute("city"); String temperature = (String) request.getAttribute("temperature"); Integer humidity = (Integer) request.getAttribute("humidity"); String error = (String) request.getAttribute("error"); %> <!DOCTYPE html> <html> <head> <title>天气信息</title> <meta charset="UTF-8"> <script> function refreshWeather() { const city = document.getElementById('cityInput').value; window.location.href = 'weather?city=' + encodeURIComponent(city); } </script> </head> <body> <h1>实时天气查询</h1> <% if (error != null) { %> <div style="color:red;"><strong>错误:</strong> <%= error %></div> <% } %> <div> <label for="cityInput">输入城市: </label> <input type="text" id="cityInput" value="<%= city != null ? city : "" %>"> <button onclick="refreshWeather()">更新天气</button> </div> <% if (temperature != null && humidity != null) { %> <h2><%= city %>的天气</h2> <ul> <li>温度: <%= temperature %>°C</li> <li>湿度: <%= humidity %>%</li> </ul> <!-- 扩展: 显示原始JSON数据 --> <details> <summary>原始API数据</summary> <pre><%= request.getAttribute("weatherData") %></pre> </details> <% } %> </body> </html> ``` #### 3.3 配置部署 - **依赖库**:添加JSON解析库(如`org.json`),通过Maven或直接引入JAR: ```xml <!-- Maven pom.xml --> <dependency> <groupId>org.json</groupId> <artifactId>json</artifactId> <version>20231013</version> </dependency> ``` - **web.xml设置**: ```xml <servlet> <servlet-name>WeatherServlet</servlet-name> <servlet-class>com.example.WeatherServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>WeatherServlet</servlet-name> <url-pattern>/weather</url-pattern> </servlet-mapping> ``` - **文件结构**(参考服务器端目录[^3]): ``` /WEB-INF /classes/com/example/WeatherServlet.class /lib/json.jar web.xml weather.jsp ``` ### 步骤4: 测试和验证 1. **测试用**: - 访问URL:`http://yourdomain.com/weather` - 输入城市(如"London"),点击"更新天气"按钮。 - 验证显示正确温度和湿度(如温度转换公式 $T_C = T_K - 273.15$ 确保精确)。 2. **常见修复**: - 若API失败:检查防火墙规则或使用代理。 - 若数据缺失:添加超时处理: ```java conn.setConnectTimeout(5000); // 在Servlet中添加超时 ``` - 若编码错误:确保JSP页面的`<meta charset="UTF-8">`。 3. **性能优化**(参考企业设计模式[^1]): - 添加缓存机制(如Redis)减少API调用。 - 异步更新:使用AJAX在后台刷新数据。 ### 相关问题
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