diff --git a/w11/ASiteCrawlStrategy.java b/w11/ASiteCrawlStrategy.java
new file mode 100644
index 0000000..93daa9a
--- /dev/null
+++ b/w11/ASiteCrawlStrategy.java
@@ -0,0 +1,15 @@
+package com.example.datacollect;
+
+// 先定义爬虫策略接口（必须先建这个，否则ASiteCrawlStrategy会报错）
+public interface ASiteCrawlStrategy {
+    void crawl(String url);
+}
+
+// A网站爬虫策略类（实现上面的接口）
+class ASiteCrawlStrategyImpl implements CrawlStrategy {
+    @Override
+    public void crawl(String url) {
+        // 先写简单逻辑：打印爬取信息
+        System.out.println("正在爬取A网站：" + url);
+    }
+}
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diff --git a/w11/CrawlException.java b/w11/CrawlException.java
new file mode 100644
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+++ b/w11/CrawlException.java
@@ -0,0 +1,14 @@
+package com.example.datacollect;
+
+// 根异常：继承RuntimeException（Unchecked异常），爬虫项目所有异常都继承它
+public class CrawlException extends RuntimeException {
+    // 构造器1：只传错误信息
+    public CrawlException(String message) {
+        super(message);
+    }
+
+    // 构造器2：传错误信息+原始异常（方便排查根因）
+    public CrawlException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}
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diff --git a/w11/NetworkException.java b/w11/NetworkException.java
new file mode 100644
index 0000000..1516cd5
--- /dev/null
+++ b/w11/NetworkException.java
@@ -0,0 +1,9 @@
+package com.example.datacollect;
+
+// 网络异常：继承根异常CrawlException
+public class NetworkException extends CrawlException {
+    public NetworkException(String message) {
+        // 给错误信息加前缀，方便定位
+        super("网络请求失败：" + message);
+    }
+}
diff --git a/w11/ParseException.java b/w11/ParseException.java
new file mode 100644
index 0000000..b63498e
--- /dev/null
+++ b/w11/ParseException.java
@@ -0,0 +1,10 @@
+package com.example.datacollect;
+
+// 解析异常：继承根异常CrawlException
+public class ParseException extends CrawlException {
+    public ParseException(String message) {
+        super("数据解析失败：" + message);
+    }
+}
+    
+
diff --git a/w11/UnsupportedSiteException.java b/w11/UnsupportedSiteException.java
new file mode 100644
index 0000000..6af593e
--- /dev/null
+++ b/w11/UnsupportedSiteException.java
@@ -0,0 +1,8 @@
+package com.example.datacollect;
+
+// 不支持的网站异常：继承根异常CrawlException
+public class UnsupportedSiteException extends CrawlException {
+    public UnsupportedSiteException(String siteKey) {
+        super("不支持的网站类型：" + siteKey);
+    }
+}
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