查询智库筛选条件为语言时，只返回智库现有语言

src/main/java/com/zzsn/thinktank/controller/SysDictItemController.java

@@ -7,8 +7,10 @@ import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.zzsn.thinktank.entity.SysDict;
 import com.zzsn.thinktank.entity.SysDictItem;
+import com.zzsn.thinktank.entity.ThinktankBasicInfo;
 import com.zzsn.thinktank.service.ISysDictItemService;
 import com.zzsn.thinktank.service.ISysDictService;
+import com.zzsn.thinktank.service.ThinktankBasicInfoService;
 import com.zzsn.thinktank.vo.Result;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang.StringUtils;
@@ -19,6 +21,9 @@ import org.springframework.web.bind.annotation.*;
 import javax.servlet.http.HttpServletRequest;
 import java.util.Arrays;
 import java.util.Date;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
 
 /**
  * <p>
@@ -32,7 +37,8 @@ import java.util.Date;
 @RequestMapping("/sys/dictItem")
 @Slf4j
 public class SysDictItemController {
-
+	@Autowired
+	ThinktankBasicInfoService thinktankBasicInfoService;
 	@Autowired
 	private ISysDictItemService sysDictItemService;
 	@Autowired
@@ -59,6 +65,23 @@ public class SysDictItemController {
 					.eq(null != sysDictItem.getStatus(), SysDictItem::getStatus, sysDictItem.getStatus())
 					.eq(null != sysDict.getId(), SysDictItem::getDictId, sysDict.getId())
 					.like(null != sysDictItem.getItemText(), SysDictItem::getItemText, sysDictItem.getItemText());
+			//查询智库筛选条件为语言时，只返回智库现有语言
+			if(sysDict.getDictCode().equals("language")){
+				QueryWrapper queryThink = new QueryWrapper();
+				queryThink.groupBy("lang");
+				queryThink.select("lang");
+				List<ThinktankBasicInfo> thinktankBasicInfo = thinktankBasicInfoService.list(queryThink);
+				// 使用 Stream API 遍历集合，过滤掉 lang 为 null 或空的元素，并收集剩余元素的 lang 字段，用英文逗号隔开
+				String langValues = thinktankBasicInfo.stream()
+						.map(ThinktankBasicInfo::getLang) // 提取 lang 字段
+						.filter(lang -> lang != null && !lang.isEmpty()) // 过滤掉 null 或空的值
+						.collect(Collectors.joining(",")); // 将结果用英文逗号连接起来
+				// 使用 Stream API 去重并重新拼接字符串
+				List<String> distinctLangValuesList = Arrays.stream(langValues.split(","))
+						.distinct()
+						.collect(Collectors.toList());
+				queryWrapper.in(SysDictItem::getItemValue,distinctLangValuesList);
+			}
 			Page<SysDictItem> page = new Page<SysDictItem>(pageNo, pageSize);
 			IPage<SysDictItem> pageList = sysDictItemService.page(page, queryWrapper);
 			result.setSuccess(true);