上传文件至 'project/exceptinhandle'

project/exceptinhandle/CacheExceptionHandler.java

@@ -0,0 +1,23 @@
+package com.crawler.exception.handler;
+
+import com.crawler.exception.CacheException;
+import com.crawler.exception.ExceptionHandler;
+import com.crawler.view.CrawlerView;
+
+public class CacheExceptionHandler implements ExceptionHandler {
+    @Override
+    public void handle(Exception e, CrawlerView view) {
+        CacheException cacheException = (CacheException) e;
+        StringBuilder message = new StringBuilder("缓存异常: ");
+        message.append(cacheException.getMessage());
+        if (cacheException.getFilePath() != null) {
+            message.append(" (路径: ").append(cacheException.getFilePath()).append(")");
+        }
+        view.showErrorMessage(message.toString());
+    }
+
+    @Override
+    public Class<? extends Exception> getSupportedExceptionType() {
+        return CacheException.class;
+    }
+}

project/exceptinhandle/ConfigurationExceptionHandler.java

@@ -0,0 +1,27 @@
+package com.crawler.exception.handler;
+
+import com.crawler.exception.ConfigurationException;
+import com.crawler.exception.InvalidUrlException;
+import com.crawler.exception.UnsupportedCrawlerException;
+import com.crawler.exception.ExceptionHandler;
+import com.crawler.view.CrawlerView;
+
+public class ConfigurationExceptionHandler implements ExceptionHandler {
+    @Override
+    public void handle(Exception e, CrawlerView view) {
+        if (e instanceof InvalidUrlException) {
+            InvalidUrlException ex = (InvalidUrlException) e;
+            view.showErrorMessage("无效的URL格式: " + ex.getInvalidUrl());
+        } else if (e instanceof UnsupportedCrawlerException) {
+            UnsupportedCrawlerException ex = (UnsupportedCrawlerException) e;
+            view.showErrorMessage("未找到支持该URL的爬虫: " + ex.getUrl());
+        } else {
+            view.showErrorMessage("配置异常: " + e.getMessage());
+        }
+    }
+
+    @Override
+    public Class<? extends Exception> getSupportedExceptionType() {
+        return ConfigurationException.class;
+    }
+}

project/exceptinhandle/CrawlerExceptionHandler.java

@@ -0,0 +1,17 @@
+package com.crawler.exception.handler;
+
+import com.crawler.exception.CrawlerException;
+import com.crawler.exception.ExceptionHandler;
+import com.crawler.view.CrawlerView;
+
+public class CrawlerExceptionHandler implements ExceptionHandler {
+    @Override
+    public void handle(Exception e, CrawlerView view) {
+        view.showErrorMessage("爬虫异常: " + e.getMessage());
+    }
+
+    @Override
+    public Class<? extends Exception> getSupportedExceptionType() {
+        return CrawlerException.class;
+    }
+}

project/exceptinhandle/ExceptionHandlerFactory.java

@@ -0,0 +1,50 @@
+package com.crawler.exception.handler;
+
+import com.crawler.exception.*;
+import com.crawler.exception.ExceptionHandler;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ExceptionHandlerFactory {
+    private static ExceptionHandlerFactory instance;
+    private List<ExceptionHandler> handlers;
+
+    private ExceptionHandlerFactory() {
+        handlers = new ArrayList<>();
+        registerHandlers();
+    }
+
+    public static ExceptionHandlerFactory getInstance() {
+        if (instance == null) {
+            instance = new ExceptionHandlerFactory();
+        }
+        return instance;
+    }
+
+    private void registerHandlers() {
+        handlers.add(new NetworkExceptionHandler());
+        handlers.add(new ParseExceptionHandler());
+        handlers.add(new CacheExceptionHandler());
+        handlers.add(new ConfigurationExceptionHandler());
+        handlers.add(new CrawlerExceptionHandler());
+    }
+
+    public ExceptionHandler getHandler(Exception e) {
+        for (ExceptionHandler handler : handlers) {
+            if (handler.getSupportedExceptionType().isInstance(e)) {
+                return handler;
+            }
+        }
+        return null;
+    }
+
+    public void handleException(Exception e, com.crawler.view.CrawlerView view) {
+        ExceptionHandler handler = getHandler(e);
+        if (handler != null) {
+            handler.handle(e, view);
+        } else {
+            view.showErrorMessage("未知异常: " + e.getMessage());
+        }
+    }
+}

project/exceptinhandle/NetworkExceptionHandler.java

@@ -0,0 +1,26 @@
+package com.crawler.exception.handler;
+
+import com.crawler.exception.HttpRequestException;
+import com.crawler.exception.NetworkException;
+import com.crawler.exception.TimeoutException;
+import com.crawler.exception.ExceptionHandler;
+import com.crawler.view.CrawlerView;
+
+public class NetworkExceptionHandler implements ExceptionHandler {
+    @Override
+    public void handle(Exception e, CrawlerView view) {
+        if (e instanceof HttpRequestException) {
+            HttpRequestException ex = (HttpRequestException) e;
+            view.showErrorMessage("HTTP请求失败，状态码: " + ex.getStatusCode());
+        } else if (e instanceof TimeoutException) {
+            view.showErrorMessage("网络连接超时，请稍后重试");
+        } else {
+            view.showErrorMessage("网络异常: " + e.getMessage());
+        }
+    }
+
+    @Override
+    public Class<? extends Exception> getSupportedExceptionType() {
+        return NetworkException.class;
+    }
+}