```

feat(public): 实现按数量抓取多页数据功能

在普通模式下，支持根据用户指定的数量抓取多页列表数据，直到满足所需数量或达到最大页数限制。增加分页请求逻辑与延时控制，提升数据获取稳定性。

feat(server): 改进详情页解析与预算金额提取逻辑

增强标题、发布时间和正文内容的选择器容错能力，支持多种页面结构。优化预算金额提取规则，引入优先级匹配机制，并支持元转万元计算，提高数据准确性。
```

public/app.js

@@ -134,10 +134,42 @@ async function fetchDetails() {
 
             listData = await dateRangeResponse.json();
         } else {
-            // 普通模式
+            // 普通模式 - 按数量抓取多页
             const url = document.getElementById('detailUrl').value;
-            const listResponse = await fetch(`${API_BASE}/list?url=${encodeURIComponent(url)}`);
-            listData = await listResponse.json();
+            const limit = parseInt(document.getElementById('detailLimit').value);
+
+            // 抓取多页直到获得足够数量
+            const allItems = [];
+            let page = 1;
+            const maxPagesToFetch = Math.ceil(limit / 10) + 1; // 假设每页约10条
+
+            while (allItems.length < limit && page <= maxPagesToFetch) {
+                const listResponse = await fetch(`${API_BASE}/list?url=${encodeURIComponent(url)}&page=${page}`);
+                const pageData = await listResponse.json();
+
+                if (!pageData.success) {
+                    if (allItems.length === 0) {
+                        results.innerHTML = `<div class="error">错误: ${pageData.error}</div>`;
+                        loading.classList.remove('active');
+                        return;
+                    }
+                    break;
+                }
+
+                if (pageData.data.length === 0) {
+                    break;
+                }
+
+                allItems.push(...pageData.data);
+                page++;
+
+                // 如果还需要更多数据且未到达上限，稍作延迟
+                if (allItems.length < limit && page <= maxPagesToFetch) {
+                    await new Promise(resolve => setTimeout(resolve, 500));
+                }
+            }
+
+            listData = { success: true, data: allItems };
         }
 
         if (!listData.success) {

src/server.js

@@ -14,11 +14,12 @@ app.use(express.static('public'));
 const BASE_URL = 'https://gjzx.nanjing.gov.cn/gggs/';
 
 // 获取分页URL
-function getPageUrl(pageIndex) {
+function getPageUrl(pageIndex, baseUrl = BASE_URL) {
   if (pageIndex === 0) {
-    return BASE_URL;
+    return baseUrl;
   }
-  return `${BASE_URL}index_${pageIndex}.html`;
+  const cleanBaseUrl = baseUrl.replace(/\/$/, '');
+  return `${cleanBaseUrl}/index_${pageIndex}.html`;
 }
 
 // 检查日期是否在范围内
@@ -151,18 +152,49 @@ function parseList(html) {
 function parseDetail(html) {
   const $ = cheerio.load(html);
 
-  const title = $('.title18').text().trim();
+  // 尝试多种标题选择器
+  let title = $('.title18').text().trim();
+  if (!title) {
+    title = $('.article-info h1').text().trim();
+  }
+  if (!title) {
+    title = $('h1').first().text().trim();
+  }
 
+  // 尝试提取发布时间
   const publishTd = $('td:contains("发布部门")').filter((_, el) => {
     return $(el).text().includes('发布时间');
   });
   const publishText = publishTd.text().trim();
+  let timeMatch = publishText.match(/(\d{4}-\d{2}-\d{2}\s+\d{2}:\d{2}:\d{2})/);
+  let publishTime = timeMatch ? timeMatch[1] : '';
 
-  const timeMatch = publishText.match(/(\d{4}-\d{2}-\d{2}\s+\d{2}:\d{2}:\d{2})/);
-  const publishTime = timeMatch ? timeMatch[1] : '';
+  // 如果第一种方式没找到，尝试其他方式
+  if (!publishTime) {
+    const infoText = $('.info-sources').text() || $('body').text();
+    timeMatch = infoText.match(/(\d{4}-\d{2}-\d{2}\s+\d{2}:\d{2})/);
+    publishTime = timeMatch ? timeMatch[1] : '';
+  }
 
-  const contentTd = $('.zhenwen td').first();
-  const content = contentTd.text().trim();
+  // 尝试多种内容选择器
+  let content = '';
+  const contentSelectors = [
+    '.zhenwen td',      // 原有格式
+    '.con',             // 新格式（宁易新系统）
+    '.article-content', // 通用格式
+    '.ewb-article-content',
+    'body'              // 兜底方案
+  ];
+
+  for (const selector of contentSelectors) {
+    const el = $(selector).first();
+    if (el.length > 0) {
+      const text = el.text().trim();
+      if (text.length > content.length) {
+        content = text;
+      }
+    }
+  }
 
   const budget = extractBudget(content);
 
@@ -175,27 +207,54 @@ function parseDetail(html) {
 }
 
 function extractBudget(content) {
+  // 直接定义金额匹配模式（从高优先级到低优先级）
   const patterns = [
-    /预算金额[：:]\s*(\d+(?:\.\d+)?)\s*万元/,
-    /最高限价[：:]\s*(\d+(?:\.\d+)?)\s*万元/,
-    /预算[：:]\s*(\d+(?:\.\d+)?)\s*万元/,
-    /金额[：:]\s*(\d+(?:\.\d+)?)\s*万元/,
-    /(\d+(?:\.\d+)?)\s*万元/,
+    // 优先级1: 带货币符号的万元
+    { regex: /(?:¥|￥|人民币)\s*([\d,，]+(?:\.\d+)?)\s*万元/i, priority: 1 },
+
+    // 优先级2: 括号内的金额(元)
+    { regex: /[（(][¥￥]([\d,，]+(?:\.\d+)?)[)）]/i, priority: 2, divider: 10000 },
+
+    // 优先级3: 普通万元格式
+    { regex: /([\d,，]+(?:\.\d+)?)\s*万元/i, priority: 3 },
+
+    // 优先级4: 带货币符号的元(转万元)
+    { regex: /(?:¥|￥|人民币)\s*([\d,，]+(?:\.\d+)?)\s*元/i, priority: 4, divider: 10000 },
+
+    // 优先级5: 普通元格式(转万元，最低优先级，排除"元整"避免误匹配中文大写)
+    { regex: /([\d,，]+(?:\.\d+)?)\s*元(?!整)/i, priority: 5, divider: 10000 }
   ];
 
+  let bestMatch = null;
+  let bestPriority = Infinity;
+
+  // 遍历所有模式,找到优先级最高的匹配
   for (const pattern of patterns) {
-    const match = content.match(pattern);
-    if (match) {
-      const amount = parseFloat(match[1]);
-      return {
+    const match = content.match(pattern.regex);
+    if (match && pattern.priority < bestPriority) {
+      // 清理数字中的逗号并转换
+      const numberStr = match[1].replace(/[,，]/g, '');
+      let amount = parseFloat(numberStr);
+
+      // 如果是元单位,转换为万元
+      if (pattern.divider) {
+        amount = amount / pattern.divider;
+      }
+
+      // 验证金额合理性(0.01万元到1000000万元之间)
+      if (!isNaN(amount) && amount >= 0.01 && amount <= 1000000) {
+        bestMatch = {
           amount,
           unit: '万元',
           text: match[0],
+          originalUnit: pattern.divider ? '元' : '万元'
         };
+        bestPriority = pattern.priority;
+      }
     }
   }
 
-  return null;
+  return bestMatch;
 }
 
 // API 路由
@@ -270,8 +329,36 @@ app.post('/api/report', async (req, res) => {
     const { limit = 15, threshold = 50, url } = req.body;
     const targetUrl = url && url.trim() !== '' ? url : BASE_URL;
 
-    const listHtml = await fetchHtml(targetUrl);
-    const items = parseList(listHtml);
+    // 按需抓取多页以获取足够的数据
+    const items = [];
+    let pageIndex = 0;
+    const maxPagesToFetch = Math.ceil(limit / 10) + 1; // 假设每页约10条，多抓一页保险
+
+    while (items.length < limit && pageIndex < maxPagesToFetch) {
+      const pageUrl = getPageUrl(pageIndex, targetUrl);
+      console.log(`正在抓取第 ${pageIndex + 1} 页: ${pageUrl}`);
+
+      try {
+        const html = await fetchHtml(pageUrl);
+        const pageItems = parseList(html);
+
+        if (pageItems.length === 0) {
+          console.log(`第 ${pageIndex + 1} 页没有数据，停止抓取`);
+          break;
+        }
+
+        items.push(...pageItems);
+        pageIndex++;
+
+        if (items.length < limit && pageIndex < maxPagesToFetch) {
+          await new Promise(resolve => setTimeout(resolve, 500));
+        }
+      } catch (err) {
+        console.error(`抓取第 ${pageIndex + 1} 页失败: ${err.message}`);
+        break;
+      }
+    }
+
     const results = [];
     const toFetch = items.slice(0, limit);