公告基础功能

.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,10 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="DuplicatedCode" enabled="true" level="WEAK WARNING" enabled_by_default="true">
+      <Languages>
+        <language minSize="61" name="Java" />
+      </Languages>
+    </inspection_tool>
+  </profile>
+</component>

src/main/java/com/cdzy/activity/component/ImageConfig.java

@@ -0,0 +1,27 @@
+package com.cdzy.activity.component;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * 微信配置类
+ *
+ * @author attiya
+ */
+@Getter
+@Setter
+@Configuration
+@ConfigurationProperties(prefix = "image")
+public class ImageConfig {
+    /**
+     * 活动封面地址
+     */
+    private String activityUrl;
+    /**
+     * 公告封面地址
+     */
+    private String bulletinUrl;
+
+}

src/main/java/com/cdzy/activity/component/MyBatisFlexConfiguration.java

@@ -1,48 +0,0 @@
-package com.cdzy.activity.component;
-
-import com.mybatisflex.annotation.KeyType;
-import com.mybatisflex.core.FlexGlobalConfig;
-import com.mybatisflex.core.audit.AuditManager;
-import com.mybatisflex.core.dialect.DbType;
-import com.mybatisflex.core.keygen.KeyGenerators;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-
-/**
- * @author attiya
- */
-@Configuration
-public class MyBatisFlexConfiguration {
-
-    private static final Logger logger = LoggerFactory.getLogger("mybatis-flex-sql:");
-
-    public MyBatisFlexConfiguration() {
-        // 只保留审计功能配置（这部分可以留在构造函数）
-        AuditManager.setAuditEnable(true);
-        AuditManager.setMessageCollector(auditMessage ->
-                logger.info("{},{}ms", auditMessage.getFullSql(), auditMessage.getElapsedTime())
-        );
-    }
-
-    @Bean
-    public FlexGlobalConfig flexGlobalConfig() {
-        FlexGlobalConfig globalConfig = FlexGlobalConfig.getDefaultConfig();
-
-
-        // 1. 数据库方言
-        globalConfig.setDbType(DbType.MYSQL);
-
-        // 2. 全局主键配置（从构造函数移到这里）
-        FlexGlobalConfig.KeyConfig keyConfig = new FlexGlobalConfig.KeyConfig();
-        keyConfig.setKeyType(KeyType.Generator);
-        keyConfig.setValue(KeyGenerators.snowFlakeId);
-        keyConfig.setBefore(true);
-        globalConfig.setKeyConfig(keyConfig);
-
-
-        logger.info("MyBatis-Flex 全局配置已完成，使用 MySQL 方言和雪花算法");
-        return globalConfig;
-    }
-}

src/main/java/com/cdzy/activity/component/SaTokenConfigure.java

@@ -29,6 +29,7 @@ public class SaTokenConfigure implements WebMvcConfigurer {
                 .addInclude("/**")
                 // 开放地址
                 .addExclude("/user/**")
+                .addExclude("/api/**")
                 .setAuth(obj -> {
                     // 登录校验 -- 拦截所有路由，并排除/user/doLogin 用于开放登录
                     SaRouter.match("/**", "/staff/login", r -> StpUtil.checkLogin());

src/main/java/com/cdzy/activity/controller/ActivityController.java

@@ -11,7 +11,6 @@ import com.mybatisflex.core.util.StringUtil;
 import jakarta.annotation.Resource;
 import org.springframework.http.MediaType;
 import org.springframework.web.bind.annotation.*;
-import org.springframework.web.multipart.MultipartFile;
 
 import java.io.IOException;
 import java.util.List;
@@ -42,18 +41,6 @@ public class ActivityController {
         activityService.saveActivity(activity);
         return JsonResult.success();
     }
-//
-//    /**
-//     * 添加。
-//     *
-//     * @param file 封面文件
-//     * @return {@code 200} 添加成功，{@code 500} 添加失败
-//     */
-//    @PostMapping("upload")
-//    public JsonResult<?> upload(MultipartFile file) throws IOException {
-//        activityService.saveActivity(activity);
-//        return JsonResult.success();
-//    }
 
     /**
      * 根据主键删除。

src/main/java/com/cdzy/activity/controller/BulletinController.java

@@ -0,0 +1,106 @@
+package com.cdzy.activity.controller;
+
+import com.cdzy.activity.model.Bulletin;
+import com.cdzy.activity.model.JsonResult;
+import com.cdzy.activity.model.PageParam;
+import com.cdzy.activity.model.vo.BulletinVo;
+import com.cdzy.activity.service.BulletinService;
+import com.mybatisflex.core.paginate.Page;
+import com.mybatisflex.core.query.QueryWrapper;
+import com.mybatisflex.core.util.StringUtil;
+import jakarta.annotation.Resource;
+import org.springframework.web.bind.annotation.*;
+
+import java.io.IOException;
+import java.util.List;
+
+import static com.cdzy.activity.model.table.BulletinTableDef.BULLETIN;
+
+/**
+ * 公告控制层。
+ *
+ * @author attiya
+ * @since 2025-09-18
+ */
+@RestController
+@RequestMapping("/bulletin")
+public class BulletinController {
+
+    @Resource
+    private BulletinService bulletinService;
+
+    /**
+     * 保存。
+     *
+     * @param bulletin 公告基础信息
+     * @return {@code true} 保存成功，{@code false} 保存失败
+     */
+    @PostMapping(value = "save",consumes = "multipart/*", headers = "content-type=multipart/form-data")
+    public JsonResult<?> save(BulletinVo bulletin) throws IOException {
+        bulletinService.saveBulletin(bulletin);
+        return JsonResult.success();
+    }
+
+    /**
+     * 根据主键删除。
+     *
+     * @param id 主键
+     * @return {@code true} 删除成功，{@code false} 删除失败
+     */
+    @DeleteMapping("remove/{id}")
+    public JsonResult<?> remove(@PathVariable Long id) {
+        bulletinService.removeById(id);
+        return JsonResult.success();
+    }
+
+    /**
+     * 根据主键更新。
+     *
+     * @param bulletin 基础信息
+     * @return {@code true} 更新成功，{@code false} 更新失败
+     */
+    @PutMapping(value = "update",consumes = "multipart/*", headers = "content-type=multipart/form-data")
+    public JsonResult<?> update(BulletinVo bulletin) throws IOException {
+        bulletinService.updateBulletind(bulletin);
+        return JsonResult.success();
+    }
+
+    /**
+     * 查询所有。
+     *
+     * @return 所有数据
+     */
+    @GetMapping("list")
+    public JsonResult<?> list() {
+        List<Bulletin> list = bulletinService.list();
+        return JsonResult.success(list);
+    }
+
+    /**
+     * 根据主键获取。
+     *
+     * @param id 主键
+     * @return 详情
+     */
+    @GetMapping("getInfo/{id}")
+    public JsonResult<?> getInfo(@PathVariable Long id) {
+        Bulletin bulletin = bulletinService.getById(id);
+        return JsonResult.success(bulletin);
+
+    }
+
+    /**
+     * 分页查询
+     * @param pageParam 分页参数
+     * @param bulletinTitle 公告标题
+     * @return 分页结果
+     */
+    @GetMapping("page")
+    public JsonResult<?> page(PageParam pageParam, String bulletinTitle) {
+        QueryWrapper queryWrapper = QueryWrapper.create()
+                .where(BULLETIN.BULLETIN_TITLE.like(bulletinTitle, StringUtil.hasText(bulletinTitle)));
+        Page<Bulletin> page = bulletinService.page(pageParam.getPage(), queryWrapper);
+        return JsonResult.success(page);
+    }
+
+}

src/main/java/com/cdzy/activity/controller/ImagePreviewController.java

@@ -0,0 +1,58 @@
+package com.cdzy.activity.controller;
+
+
+import com.cdzy.activity.component.ImageConfig;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.UrlResource;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.net.MalformedURLException;
+import java.nio.file.Path;
+
+/**
+ * 图片预览控制层。
+ */
+@RestController
+@RequestMapping("/api/images")
+public class ImagePreviewController {
+
+    @Autowired
+    private ImageConfig imageConfig;
+
+    /**
+     * 活动封面预览
+     * @param filename 封面文件名称
+     * @return 图片
+     * @throws MalformedURLException 预览错误
+     */
+    @GetMapping(value = "/activity/{filename}", produces = {
+        MediaType.IMAGE_JPEG_VALUE,
+        MediaType.IMAGE_PNG_VALUE,
+        MediaType.IMAGE_GIF_VALUE
+    })
+    public Resource previewActivityImage(@PathVariable String filename) throws MalformedURLException {
+        Path filePath = Path.of(imageConfig.getActivityUrl(), filename);
+        return new UrlResource(filePath.toUri());
+    }
+
+    /**
+     * 公告封面预览
+     * @param filename 封面文件名称
+     * @return 图片
+     * @throws MalformedURLException 预览错误
+     */
+    @GetMapping(value = "/bulletin/{filename}", produces = {
+            MediaType.IMAGE_JPEG_VALUE,
+            MediaType.IMAGE_PNG_VALUE,
+            MediaType.IMAGE_GIF_VALUE
+    })
+    public Resource previewBulletinImage(@PathVariable String filename) throws MalformedURLException {
+        Path filePath = Path.of(imageConfig.getBulletinUrl(), filename);
+        return new UrlResource(filePath.toUri());
+    }
+}

src/main/java/com/cdzy/activity/controller/TestController.java

@@ -1,16 +0,0 @@
-package com.cdzy.activity.controller;
-
-
-import com.cdzy.activity.model.JsonResult;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-import java.time.LocalDateTime;
-
-@RestController
-public class TestController {
-    @GetMapping("/test")
-    public JsonResult<?> test() {
-        return JsonResult.success(LocalDateTime.now());
-    }
-}

src/main/java/com/cdzy/activity/mapper/BulletinMapper.java

@@ -0,0 +1,14 @@
+package com.cdzy.activity.mapper;
+
+import com.mybatisflex.core.BaseMapper;
+import com.cdzy.activity.model.Bulletin;
+
+/**
+ *  映射层。
+ *
+ * @author attiya
+ * @since 2025-09-18
+ */
+public interface BulletinMapper extends BaseMapper<Bulletin> {
+
+}

src/main/java/com/cdzy/activity/model/Bulletin.java

@@ -0,0 +1,50 @@
+package com.cdzy.activity.model;
+
+import com.mybatisflex.annotation.Id;
+import com.mybatisflex.annotation.KeyType;
+import com.mybatisflex.annotation.Table;
+import java.io.Serializable;
+
+import java.io.Serial;
+
+import com.mybatisflex.core.keygen.KeyGenerators;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ *  实体类。
+ *
+ * @author attiya
+ * @since 2025-09-18
+ */
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+@Table("bulletin")
+public class Bulletin implements Serializable {
+
+    @Serial
+    private static final long serialVersionUID = 1L;
+
+    @Id(keyType = KeyType.Generator, value = KeyGenerators.snowFlakeId)
+    private Long bulletinId;
+
+    /**
+     * 公告标题
+     */
+    private String bulletinTitle;
+
+    /**
+     * 封面
+     */
+    private String bulletinCover;
+
+    /**
+     * 内容
+     */
+    private String bulletinDescription;
+
+}

src/main/java/com/cdzy/activity/model/vo/BulletinVo.java

@@ -0,0 +1,48 @@
+package com.cdzy.activity.model.vo;
+
+import com.mybatisflex.annotation.Id;
+import com.mybatisflex.annotation.KeyType;
+import com.mybatisflex.annotation.Table;
+import com.mybatisflex.core.keygen.KeyGenerators;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.Serial;
+import java.io.Serializable;
+
+/**
+ *  实体类。
+ *
+ * @author attiya
+ * @since 2025-09-18
+ */
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class BulletinVo implements Serializable {
+
+    @Serial
+    private static final long serialVersionUID = 1L;
+
+    private Long bulletinId;
+
+    /**
+     * 公告标题
+     */
+    private String bulletinTitle;
+
+    /**
+     * 封面
+     */
+    private MultipartFile bulletinCover;
+
+    /**
+     * 内容
+     */
+    private String bulletinDescription;
+
+}

src/main/java/com/cdzy/activity/service/BulletinService.java

@@ -0,0 +1,20 @@
+package com.cdzy.activity.service;
+
+import com.cdzy.activity.model.vo.BulletinVo;
+import com.mybatisflex.core.service.IService;
+import com.cdzy.activity.model.Bulletin;
+
+import java.io.IOException;
+
+/**
+ *  服务层。
+ *
+ * @author attiya
+ * @since 2025-09-18
+ */
+public interface BulletinService extends IService<Bulletin> {
+
+    void saveBulletin(BulletinVo bulletin) throws IOException;
+
+    void updateBulletind(BulletinVo bulletin) throws IOException;
+}

src/main/java/com/cdzy/activity/service/impl/ActivityServiceImpl.java

@@ -1,16 +1,22 @@
 package com.cdzy.activity.service.impl;
 
+import cn.hutool.core.io.FileUtil;
+import cn.hutool.core.lang.UUID;
+import com.cdzy.activity.component.ImageConfig;
 import com.cdzy.activity.enums.ActivityStatus;
 import com.cdzy.activity.mapper.ActivityMapper;
 import com.cdzy.activity.model.Activity;
 import com.cdzy.activity.model.vo.ActivityVo;
 import com.cdzy.activity.service.ActivityService;
+import com.cdzy.activity.uitls.FileUtils;
 import com.cdzy.activity.uitls.ImageToBase64Converter;
 import com.mybatisflex.core.query.QueryWrapper;
 import com.mybatisflex.spring.service.impl.ServiceImpl;
 import jakarta.annotation.Resource;
 import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
 
+import java.io.File;
 import java.io.IOException;
 import java.time.LocalDateTime;
 import java.util.List;
@@ -29,9 +35,20 @@ public class ActivityServiceImpl extends ServiceImpl<ActivityMapper, Activity>
     @Resource
     private ActivityMapper activityMapper;
 
+    @Resource
+    private ImageConfig imageConfig;
+
     @Override
     public void saveActivity(ActivityVo activity) throws IOException {
-        String convert = ImageToBase64Converter.convertToBase64(activity.getActivityCover());
+        MultipartFile activityCover = activity.getActivityCover();
+        String convert = null;
+        if (activityCover != null){
+        String uuid = UUID.randomUUID().toString();
+        String fileExtension = FileUtils.getFileExtension(activityCover);
+        String destPath = imageConfig.getActivityUrl()+"/"+uuid+fileExtension;
+            FileUtils.copyMultipartFile(activityCover,destPath,true);
+            convert = uuid + fileExtension;
+        }
         Activity entity = Activity.builder()
                 .activityName(activity.getActivityName())
                 .activityCover(convert)
@@ -44,6 +61,7 @@ public class ActivityServiceImpl extends ServiceImpl<ActivityMapper, Activity>
                 .endTime(activity.getEndTime())
                 .maxNum(activity.getMaxNum())
                 .limitPeople(activity.getLimitPeople())
+                .limitRegister(activity.getLimitRegister())
                 .status(ActivityStatus.UN_START_REGISTERING)
                 .build();
         activityMapper.insert(entity);
@@ -54,7 +72,16 @@ public class ActivityServiceImpl extends ServiceImpl<ActivityMapper, Activity>
         Activity entity = activityMapper.selectOneById(activity.getActivityId());
         if (entity != null) {
             entity.setActivityName(activity.getActivityName());
-            String convert = ImageToBase64Converter.convertToBase64(activity.getActivityCover());
+            MultipartFile activityCover = activity.getActivityCover();
+            String convert = entity.getActivityCover();
+            if (activityCover != null){
+                String uuid = UUID.randomUUID().toString();
+                String fileExtension = FileUtils.getFileExtension(activityCover);
+                String destPath = imageConfig.getActivityUrl()+"/"+uuid+fileExtension;
+                FileUtils.copyMultipartFile(activityCover,destPath,true);
+                FileUtil.del(imageConfig.getActivityUrl()+"/"+convert);
+                convert = uuid + fileExtension;
+            }
             entity.setActivityCover(convert);
             entity.setActivitySponsor(activity.getActivitySponsor());
             entity.setActivityDescription(activity.getActivityDescription());
@@ -65,6 +92,7 @@ public class ActivityServiceImpl extends ServiceImpl<ActivityMapper, Activity>
             entity.setEndTime(activity.getEndTime());
             entity.setMaxNum(activity.getMaxNum());
             entity.setLimitPeople(activity.getLimitPeople());
+            entity.setLimitRegister(activity.getLimitRegister());
             activityMapper.update(entity);
         }else {
             throw new RuntimeException("该活动不存在");

src/main/java/com/cdzy/activity/service/impl/BulletinServiceImpl.java

@@ -0,0 +1,75 @@
+package com.cdzy.activity.service.impl;
+
+import cn.hutool.core.io.FileUtil;
+import cn.hutool.core.lang.UUID;
+import com.cdzy.activity.component.ImageConfig;
+import com.cdzy.activity.model.vo.ActivityVo;
+import com.cdzy.activity.model.vo.BulletinVo;
+import com.cdzy.activity.uitls.FileUtils;
+import com.mybatisflex.spring.service.impl.ServiceImpl;
+import com.cdzy.activity.model.Bulletin;
+import com.cdzy.activity.mapper.BulletinMapper;
+import com.cdzy.activity.service.BulletinService;
+import jakarta.annotation.Resource;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+
+/**
+ * 服务层实现。
+ *
+ * @author attiya
+ * @since 2025-09-18
+ */
+@Service
+public class BulletinServiceImpl extends ServiceImpl<BulletinMapper, Bulletin> implements BulletinService {
+
+    @Resource
+    private BulletinMapper bulletinMapper;
+
+    @Resource
+    private ImageConfig imageConfig;
+
+    @Override
+    public void saveBulletin(BulletinVo bulletin) throws IOException {
+        MultipartFile activityCover = bulletin.getBulletinCover();
+        String convert = null;
+        if (activityCover != null) {
+            String uuid = UUID.randomUUID().toString();
+            String fileExtension = FileUtils.getFileExtension(activityCover);
+            String destPath = imageConfig.getActivityUrl() + "/" + uuid + fileExtension;
+            FileUtils.copyMultipartFile(activityCover, destPath, true);
+            convert = uuid + fileExtension;
+        }
+        Bulletin entity = Bulletin.builder()
+                .bulletinCover(convert)
+                .bulletinTitle(bulletin.getBulletinTitle())
+                .bulletinDescription(bulletin.getBulletinDescription())
+                .build();
+        bulletinMapper.insert(entity);
+    }
+
+    @Override
+    public void updateBulletind(BulletinVo bulletin) throws IOException {
+        Bulletin entity = bulletinMapper.selectOneById(bulletin.getBulletinId());
+        if (entity != null) {
+            entity.setBulletinTitle(bulletin.getBulletinTitle());
+            MultipartFile activityCover = bulletin.getBulletinCover();
+            String convert = entity.getBulletinCover();
+            if (activityCover != null) {
+                String uuid = UUID.randomUUID().toString();
+                String fileExtension = FileUtils.getFileExtension(activityCover);
+                String destPath = imageConfig.getActivityUrl() + "/" + uuid + fileExtension;
+                FileUtils.copyMultipartFile(activityCover, destPath, true);
+                FileUtil.del(imageConfig.getActivityUrl() + "/" + convert);
+                convert = uuid + fileExtension;
+            }
+            entity.setBulletinCover(convert);
+            entity.setBulletinDescription(bulletin.getBulletinDescription());
+            bulletinMapper.update(entity);
+        } else {
+            throw new RuntimeException("该公告不存在");
+        }
+    }
+}

src/main/java/com/cdzy/activity/uitls/FileUtils.java

@@ -0,0 +1,57 @@
+package com.cdzy.activity.uitls;
+
+import cn.hutool.core.io.FileUtil;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Optional;
+
+public class FileUtils {
+    /**
+     * 安全获取文件后缀（包含点符号）
+     * @param file MultipartFile对象
+     * @return 如 ".jpg" 或空字符串
+     */
+    public static String getFileExtension(MultipartFile file) {
+        return Optional.ofNullable(file.getOriginalFilename())
+            .filter(name -> name.contains("."))
+            .map(name -> name.substring(name.lastIndexOf(".")))
+            .orElse("");
+    }
+
+    /**
+     * 获取无点的纯后缀（小写形式）
+     * @param file MultipartFile对象
+     * @return 如 "jpg" 或空字符串
+     */
+    public static String getFileExtensionWithoutDot(MultipartFile file) {
+        return getFileExtension(file).replace(".", "").toLowerCase();
+    }
+
+    /**
+     * 复制MultipartFile到指定路径（自动创建目录）
+     *
+     * @param file     源文件（MultipartFile类型）
+     * @param destPath 目标绝对路径（包含文件名）
+     * @param override 是否覆盖已存在文件
+     * @throws IOException 文件操作异常
+     */
+    public static void copyMultipartFile(MultipartFile file, String destPath, boolean override) throws IOException {
+        // 校验目标路径
+        if (destPath == null || destPath.trim().isEmpty()) {
+            throw new IllegalArgumentException("Destination path cannot be empty");
+        }
+
+        // 创建父目录（如果不存在）
+        File destFile = new File(destPath);
+        FileUtil.mkParentDirs(destFile);
+
+        // 执行文件复制
+        if (override || !destFile.exists()) {
+            file.transferTo(destFile);
+        }
+
+    }
+
+}

src/main/resources/application-dev.yml

@@ -67,4 +67,6 @@ wechat:
   appid: wx327d788d7bd6eddf
   app-secret: adf2539a6c26499c67b5a3829f2e05e3
 
-
+image:
+  activity-url: D:/file/activity
+  bulletin-url: D:/file/bulletin

target/classes/application-dev.yml

@@ -67,4 +67,6 @@ wechat:
   appid: wx327d788d7bd6eddf
   app-secret: adf2539a6c26499c67b5a3829f2e05e3
 
-
+image:
+  activity-url: D:/file/activity
+  bulletin-url: D:/file/bulletin

target/generated-sources/annotations/com/cdzy/activity/model/table/BulletinTableDef.java

@@ -0,0 +1,57 @@
+package com.cdzy.activity.model.table;
+
+import com.mybatisflex.core.query.QueryColumn;
+import com.mybatisflex.core.table.TableDef;
+
+// Auto generate by mybatis-flex, do not modify it.
+public class BulletinTableDef extends TableDef {
+
+    /**
+     * 实体类。
+
+ @author attiya
+ @since 2025-09-18
+     */
+    public static final BulletinTableDef BULLETIN = new BulletinTableDef();
+
+    public final QueryColumn BULLETIN_ID = new QueryColumn(this, "bulletin_id");
+
+    /**
+     * 封面
+     */
+    public final QueryColumn BULLETIN_COVER = new QueryColumn(this, "bulletin_cover");
+
+    /**
+     * 公告标题
+     */
+    public final QueryColumn BULLETIN_TITLE = new QueryColumn(this, "bulletin_title");
+
+    /**
+     * 内容
+     */
+    public final QueryColumn BULLETIN_DESCRIPTION = new QueryColumn(this, "bulletin_description");
+
+    /**
+     * 所有字段。
+     */
+    public final QueryColumn ALL_COLUMNS = new QueryColumn(this, "*");
+
+    /**
+     * 默认字段，不包含逻辑删除或者 large 等字段。
+     */
+    public final QueryColumn[] DEFAULT_COLUMNS = new QueryColumn[]{BULLETIN_ID, BULLETIN_COVER, BULLETIN_TITLE, BULLETIN_DESCRIPTION};
+
+    public BulletinTableDef() {
+        super("", "bulletin");
+    }
+
+    private BulletinTableDef(String schema, String name, String alisa) {
+        super(schema, name, alisa);
+    }
+
+    public BulletinTableDef as(String alias) {
+        String key = getNameWithSchema() + "." + alias;
+        return getCache(key, k -> new BulletinTableDef("", "bulletin", alias));
+    }
+
+}