2024.4.11

完成了node的组合条件查询和分页

src/main/java/com/hongliang/videotask/MapperProvider/NodeProvider.java

@@ -0,0 +1,39 @@
+package com.hongliang.videotask.MapperProvider;
+
+import org.apache.ibatis.annotations.Param;
+
+import java.util.Map;
+
+public class NodeProvider {
+    /**
+     * 组合条件查询
+     * @param condition 包含pageNum,pageSize,查询字段项,orderby
+     * @return
+     */
+    public String  GetNodeList(Map<String,Object> condition){
+//        System.out.println("condition:"+condition.toString());
+        // 使用StringBuilder来拼接SQL
+        StringBuilder sb=new StringBuilder();
+        sb.append("select * from node where 1=1");
+
+        //开如拼接查询条件
+        if (condition.containsKey("nodename")){
+            sb.append(" and nodename like concat('%', #{nodename},'%')");
+        }
+
+        //……如果有其他条件，就继续
+
+        //如果有排序
+        if (condition.containsKey("orderby")){
+            sb.append(" order by #{orderby}");
+        }
+
+        //拼接分页
+        if (condition.containsKey("offset") && condition.containsKey("pageSize")){
+            sb.append(" limit #{offset},#{pageSize}");
+        }
+
+        //返回sql语句
+        return sb.toString();
+    }
+}