实现了本地、云端数据库校验版本号接口

src/main/java/com/example/catchTheLetters/controller/LevelController.java

@@ -4,6 +4,7 @@ import com.example.catchTheLetters.entity.Level;
 import com.example.catchTheLetters.model.vo.RankVo;
 import com.example.catchTheLetters.entity.ScoreInfo;
 import com.example.catchTheLetters.service.LevelService;
+import com.example.catchTheLetters.service.VersionService;
 import com.example.catchTheLetters.utils.R;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
@@ -27,6 +28,9 @@ public class LevelController {
     @Resource
     private LevelService levelService;
 
+    @Resource
+    private VersionService versionService;
+
     @ApiOperation(value = "关卡列表（只返回ID、排序、名称和类型）")
     @GetMapping("/list")
     public R<List<Level>> list() {
@@ -43,20 +47,38 @@ public class LevelController {
     @ApiOperation(value = "关卡创建（web前端管理员提交）")
     @PostMapping("/create")
     public R create(@RequestBody Level level) {
-        return levelService.levelCreate(level) ? R.ok() : R.fail();
+        var res = levelService.levelCreate(level);
+        // 如果创建成功，将当前UNIX时间戳作为版本号
+        if (res) {
+            versionService.setVersion("level", System.currentTimeMillis());
+            return R.ok();
+        }
+        return R.fail();
     }
 
     @ApiOperation(value = "关卡修改（web前端管理员提交）")
     @PostMapping("/update")
     public R update(@RequestBody Level level)
     {
-        return levelService.update(level) ? R.ok() : R.fail();
+        var res = levelService.update(level);
+        // 如果修改成功，将当前UNIX时间戳作为版本号
+        if (res) {
+            versionService.setVersion("level", System.currentTimeMillis());
+            return R.ok();
+        }
+        return R.fail();
     }
 
     @ApiOperation(value = "关卡删除（web前端管理员提交）")
     @PostMapping("/delete")
     public R delete(String id) {
-        return levelService.delete(id) ? R.ok() : R.fail();
+        var res = levelService.delete(id);
+        // 如果删除成功，将当前UNIX时间戳作为版本号
+        if (res) {
+            versionService.setVersion("level", System.currentTimeMillis());
+            return R.ok();
+        }
+        return R.fail();
     }
 
     @ApiOperation(value = "获取某个关卡排行榜数据")
@@ -71,4 +93,10 @@ public class LevelController {
     public R<ScoreInfo> settle(@RequestBody ScoreInfo scoreInfo, @RequestHeader("token")String token) {
         return levelService.settle(scoreInfo, token);
     }
+
+    @ApiOperation(value = "获取表版本号（用于本地数据库和服务器数据库同步）")
+    @GetMapping("/version")
+    public R<Long> version() {
+        return R.ok(versionService.getVersion("level"));
+    }
 }

src/main/java/com/example/catchTheLetters/entity/Version.java

@@ -19,4 +19,12 @@ public class Version implements Serializable {
      * 数据表版本号
      */
     private Long version;
+
+    public Version() {
+    }
+
+    public Version(String table, Long version) {
+        this.table = table;
+        this.version = version;
+    }
 }

src/main/java/com/example/catchTheLetters/service/VersionService.java

@@ -0,0 +1,24 @@
+package com.example.catchTheLetters.service;
+
+/**
+ * 版本服务接口
+ *
+ * @author spyn
+ */
+public interface VersionService {
+    /**
+     * 获取某个表的版本号(用于Realm对MongoDB的数据表版本进行同步检测，版本号不同则进行同步)
+     *
+     * @param tableName 表名
+     * @return 版本号
+     */
+    Long getVersion(String tableName);
+
+    /**
+     * 设置某个表的版本号(用于Realm对MongoDB的数据表版本进行同步检测，版本号不同则进行同步)
+     *
+     * @param tableName 表名
+     * @param version   版本号
+     */
+    void setVersion(String tableName, Long version);
+}

src/main/java/com/example/catchTheLetters/service/impl/VersionServiceImpl.java

@@ -0,0 +1,33 @@
+package com.example.catchTheLetters.service.impl;
+
+import com.example.catchTheLetters.entity.Version;
+import com.example.catchTheLetters.service.VersionService;
+import jakarta.annotation.Resource;
+import org.springframework.data.mongodb.core.MongoTemplate;
+import org.springframework.data.mongodb.core.query.Criteria;
+import org.springframework.data.mongodb.core.query.Query;
+import org.springframework.stereotype.Service;
+
+@Service
+public class VersionServiceImpl implements VersionService {
+
+    @Resource
+    private MongoTemplate mongoTemplate;
+
+    @Override
+    public Long getVersion(String tableName) {
+        var res = mongoTemplate.findOne(new Query(Criteria.where("table").is(tableName)), Version.class);
+        return res == null ? null : res.getVersion();
+    }
+
+    @Override
+    public void setVersion(String tableName, Long version) {
+        var res = mongoTemplate.findOne(new Query(Criteria.where("table").is(tableName)), Version.class);
+        if (res == null) {
+            mongoTemplate.save(new Version(tableName, version));
+        } else {
+            res.setVersion(version);
+            mongoTemplate.save(res);
+        }
+    }
+}

src/test/java/com/example/catchTheLetters/TestInsertLevel.java

@@ -1,5 +1,6 @@
 package com.example.catchTheLetters;
 
+import com.example.catchTheLetters.controller.LevelController;
 import com.example.catchTheLetters.entity.Level;
 import com.example.catchTheLetters.service.LevelService;
 import jakarta.annotation.Resource;
@@ -7,17 +8,16 @@ import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 
 import java.util.ArrayList;
+import java.util.List;
 import java.util.Random;
 
 @SpringBootTest
 class TestInsertLevel {
 
     @Resource
-    private LevelService levelService;
+    private LevelController levelController;
 
-    @Test
-    void testInsertLevel() {
-        var words = new ArrayList<String>(){
+    private final List<String> words = new ArrayList<>() {
         {
             add("apple");
             add("banana");
@@ -48,6 +48,8 @@ class TestInsertLevel {
         }
     };
 
+    @Test
+    void testInsertLevel() {
         // 存20个关卡
         for (int i = 0; i < 20; i++) {
             var type = new Random().nextInt(2);
@@ -59,9 +61,25 @@ class TestInsertLevel {
                 wordList.add(words.get(new Random().nextInt(words.size())));
             }
             // 时间全部设置为3分钟
-            var level = new Level(Integer.toString(i), i, "Level" + i, type, 180000L, targetScore, wordList);
+            var level = new Level(Integer.toString(i), i, "Level " + i, type, 180000L, targetScore, wordList);
 
-            levelService.levelCreate(level);
+            levelController.create(level);
         }
     }
+
+    @Test
+    void insertALevel() {
+        var type = new Random().nextInt(2);
+        // 如果是1，则需要设置目标分数
+        var targetScore = type == 1 ? new Random().nextInt(100) : null;
+        // 如果是0，则单词列表5个就够，否则15个
+        var wordList = new ArrayList<String>();
+        for (int j = 0; j < (type == 0 ? 5 : 15); j++) {
+            wordList.add(words.get(new Random().nextInt(words.size())));
+        }
+        // 时间全部设置为3分钟
+        var level = new Level("20", 20, "Level 20", type, 180000L, targetScore, wordList);
+
+        levelController.create(level);
+    }
 }