feat: 实现API文档支持与系统优化

refactor(ArticleRepository): 修正@Param注解导入错误并优化查询方法
fix(ArticleService): 解决事务回滚问题并优化日志配置
feat(SecurityConfig): 添加Spring Security配置禁用默认认证
docs: 添加详细API文档README_API.md
feat(HelpController): 实现Markdown文档渲染API
style: 清理无用注释和导入
build: 更新pom.xml依赖和插件配置
chore: 优化application.properties配置

src/main/java/com/qf/myafterprojecy/controller/HelpController.java

@@ -0,0 +1,73 @@
+package com.qf.myafterprojecy.controller;
+
+import com.qf.myafterprojecy.pojo.ResponseMessage;
+import org.commonmark.node.Node;
+import org.commonmark.parser.Parser;
+import org.commonmark.renderer.html.HtmlRenderer;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.util.FileCopyUtils;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * 帮助控制器类，处理前端调用api/help请求
+ * 提供README_API.md文件的读取和返回功能
+ */
+@RestController
+@RequestMapping("/api/help")
+public class HelpController {
+
+    /**
+     * 获取README_API.md文件内容
+     * @return 返回包含README_API.md文件内容的ResponseMessage对象
+     */
+    @GetMapping
+    public ResponseMessage<String> getReadmeApi() {
+        try {
+            // 获取项目根目录
+            String rootPath = System.getProperty("user.dir");
+            // 构建README_API.md文件路径
+            File readmeFile = new File(rootPath, "README_API.md");
+            
+            // 检查文件是否存在
+            if (!readmeFile.exists() || !readmeFile.isFile()) {
+                // 如果不存在，尝试使用类路径资源加载
+                    try {
+                        ClassPathResource resource = new ClassPathResource("README_API.md");
+                        String markdownContent = new String(FileCopyUtils.copyToByteArray(resource.getInputStream()), StandardCharsets.UTF_8);
+                        // 将Markdown转换为HTML
+                        String htmlContent = convertMarkdownToHtml(markdownContent);
+                        return ResponseMessage.success(htmlContent, "获取API文档成功");
+                    } catch (IOException e) {
+                        return ResponseMessage.error("未找到README_API.md文件");
+                    }
+            }
+            
+            // 读取文件内容
+            String markdownContent = new String(FileCopyUtils.copyToByteArray(new FileInputStream(readmeFile)), StandardCharsets.UTF_8);
+            // 将Markdown转换为HTML
+            String htmlContent = convertMarkdownToHtml(markdownContent);
+            return ResponseMessage.success(htmlContent, "获取API文档成功");
+        } catch (IOException e) {
+            return ResponseMessage.error("读取README_API.md文件失败: " + e.getMessage());
+        }
+    }
+
+    /**
+     * 将Markdown文本转换为HTML
+     * @param markdown 原始Markdown文本
+     * @return 转换后的HTML字符串
+     */
+    private String convertMarkdownToHtml(String markdown) {
+        Parser parser = Parser.builder().build();
+        Node document = parser.parse(markdown);
+        HtmlRenderer renderer = HtmlRenderer.builder().build();
+        return renderer.render(document);
+    }
+}