chore: initial project setup

src/main/java/com/svnmanager/service/DiffService.java

@@ -0,0 +1,64 @@
+package com.svnmanager.service;
+
+import com.svnmanager.util.ProcessUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Diff服务
+ */
+public class DiffService extends SvnService {
+    private static final Logger logger = LoggerFactory.getLogger(DiffService.class);
+    
+    /**
+     * 获取差异
+     * 
+     * @param workingDirectory 工作目录
+     * @param filePath 文件路径（null表示所有文件）
+     * @return 差异内容
+     * @throws IOException IO异常
+     * @throws InterruptedException 中断异常
+     * @throws TimeoutException 超时异常
+     */
+    public String getDiff(String workingDirectory, String filePath) 
+            throws IOException, InterruptedException, TimeoutException {
+        logger.debug("获取差异: {}", workingDirectory);
+        
+        if (!isValidWorkingCopy(workingDirectory)) {
+            throw new IllegalArgumentException("无效的SVN工作副本: " + workingDirectory);
+        }
+        
+        List<String> args = new ArrayList<>();
+        if (filePath != null && !filePath.isEmpty()) {
+            args.add(filePath);
+        }
+        
+        ProcessUtil.ProcessResult result = executeSvnCommand("diff", args, workingDirectory);
+        
+        if (result.isSuccess()) {
+            return result.getOutputAsString();
+        } else {
+            logger.warn("获取差异失败: {}", result.getErrorAsString());
+            return result.getErrorAsString();
+        }
+    }
+    
+    /**
+     * 获取所有文件的差异
+     * 
+     * @param workingDirectory 工作目录
+     * @return 差异内容
+     * @throws IOException IO异常
+     * @throws InterruptedException 中断异常
+     * @throws TimeoutException 超时异常
+     */
+    public String getDiff(String workingDirectory) 
+            throws IOException, InterruptedException, TimeoutException {
+        return getDiff(workingDirectory, null);
+    }
+}