From 4b44c462b4c4be6ce4b4e795e0d3b35b1982d7b5 Mon Sep 17 00:00:00 2001
From: zxy <2074995204@qq.com>
Date: Wed, 30 Apr 2025 13:53:06 +0800
Subject: [PATCH] zxy

---
 .../mapper/DiscussjiudianjianjieDao.xml       | 88 +++++++++++++------
 1 file changed, 63 insertions(+), 25 deletions(-)

diff --git a/back/src/main/resources/mapper/DiscussjiudianjianjieDao.xml b/back/src/main/resources/mapper/DiscussjiudianjianjieDao.xml
index 43b53c9f..50cb055b 100644
--- a/back/src/main/resources/mapper/DiscussjiudianjianjieDao.xml
+++ b/back/src/main/resources/mapper/DiscussjiudianjianjieDao.xml
@@ -1,40 +1,78 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 
+<!-- 定义一个 Mapper，命名空间为 com.dao.DiscussjiudianjianjieDao，该命名空间与对应的 DAO 接口关联 -->
 <mapper namespace="com.dao.DiscussjiudianjianjieDao">
 
-	<!-- 可根据自己的需求，是否要使用 -->
-    <resultMap type="com.entity.DiscussjiudianjianjieEntity" id="discussjiudianjianjieMap">
-        <result property="refid" column="refid"/>
-        <result property="userid" column="userid"/>
-        <result property="nickname" column="nickname"/>
-        <result property="content" column="content"/>
-        <result property="reply" column="reply"/>
-    </resultMap>
+	<!--
+        可根据自己的需求，是否要使用
+        定义一个结果映射，将数据库表中的列映射到 Java 对象的属性上
+        type: 指定结果映射对应的 Java 实体类，这里是 com.entity.DiscussjiudianjianjieEntity
+        id: 结果映射的唯一标识，这里是 discussjiudianjianjieMap
+    -->
+	<resultMap type="com.entity.DiscussjiudianjianjieEntity" id="discussjiudianjianjieMap">
+		<!-- 将数据库表中的 refid 列映射到 Java 对象的 refid 属性 -->
+		<result property="refid" column="refid"/>
+		<!-- 将数据库表中的 userid 列映射到 Java 对象的 userid 属性 -->
+		<result property="userid" column="userid"/>
+		<!-- 将数据库表中的 nickname 列映射到 Java 对象的 nickname 属性 -->
+		<result property="nickname" column="nickname"/>
+		<!-- 将数据库表中的 content 列映射到 Java 对象的 content 属性 -->
+		<result property="content" column="content"/>
+		<!-- 将数据库表中的 reply 列映射到 Java 对象的 reply 属性 -->
+		<result property="reply" column="reply"/>
+	</resultMap>
 
+	<!--
+        查询方法，方法名为 selectListVO
+        resultType: 指定查询结果的类型，这里是 com.entity.vo.DiscussjiudianjianjieVO
+        功能：从 discussjiudianjianjie 表中查询满足条件的所有记录，条件通过 ew.sqlSegment 动态传入
+    -->
 	<select id="selectListVO"
-		resultType="com.entity.vo.DiscussjiudianjianjieVO" >
-		SELECT * FROM discussjiudianjianjie  discussjiudianjianjie         
-        <where> 1=1 ${ew.sqlSegment}</where>
+			resultType="com.entity.vo.DiscussjiudianjianjieVO" >
+		<!-- 从 discussjiudianjianjie 表中查询所有列 -->
+		SELECT * FROM discussjiudianjianjie  discussjiudianjianjie
+		<!-- where 标签用于动态构建查询条件，1=1 是为了方便后续拼接条件 -->
+		<where> 1=1 ${ew.sqlSegment}</where>
 	</select>
-	
+
+	<!--
+        查询方法，方法名为 selectVO
+        resultType: 指定查询结果的类型，这里是 com.entity.vo.DiscussjiudianjianjieVO
+        功能：从 discussjiudianjianjie 表中查询满足条件的单条记录，条件通过 ew.sqlSegment 动态传入
+    -->
 	<select id="selectVO"
-		resultType="com.entity.vo.DiscussjiudianjianjieVO" >
-		SELECT  discussjiudianjianjie.* FROM discussjiudianjianjie  discussjiudianjianjie 	
- 		<where> 1=1 ${ew.sqlSegment}</where>
+			resultType="com.entity.vo.DiscussjiudianjianjieVO" >
+		<!-- 从 discussjiudianjianjie 表中查询所有列 -->
+		SELECT  discussjiudianjianjie.* FROM discussjiudianjianjie  discussjiudianjianjie
+		<!-- where 标签用于动态构建查询条件，1=1 是为了方便后续拼接条件 -->
+		<where> 1=1 ${ew.sqlSegment}</where>
 	</select>
 
-    <select id="selectListView"
-		resultType="com.entity.view.DiscussjiudianjianjieView" >
-
-		SELECT  discussjiudianjianjie.* FROM discussjiudianjianjie  discussjiudianjianjie 	        
-        <where> 1=1 ${ew.sqlSegment}</where>
+	<!--
+        查询方法，方法名为 selectListView
+        resultType: 指定查询结果的类型，这里是 com.entity.view.DiscussjiudianjianjieView
+        功能：从 discussjiudianjianjie 表中查询满足条件的所有记录，以视图对象形式返回，条件通过 ew.sqlSegment 动态传入
+    -->
+	<select id="selectListView"
+			resultType="com.entity.view.DiscussjiudianjianjieView" >
+		<!-- 从 discussjiudianjianjie 表中查询所有列 -->
+		SELECT  discussjiudianjianjie.* FROM discussjiudianjianjie  discussjiudianjianjie
+		<!-- where 标签用于动态构建查询条件，1=1 是为了方便后续拼接条件 -->
+		<where> 1=1 ${ew.sqlSegment}</where>
 	</select>
-	
+
+	<!--
+        查询方法，方法名为 selectView
+        resultType: 指定查询结果的类型，这里是 com.entity.view.DiscussjiudianjianjieView
+        功能：从 discussjiudianjianjie 表中查询满足条件的单条记录，以视图对象形式返回，条件通过 ew.sqlSegment 动态传入
+    -->
 	<select id="selectView"
-		resultType="com.entity.view.DiscussjiudianjianjieView" >
-		SELECT * FROM discussjiudianjianjie  discussjiudianjianjie <where> 1=1 ${ew.sqlSegment}</where>
+			resultType="com.entity.view.DiscussjiudianjianjieView" >
+		<!-- 从 discussjiudianjianjie 表中查询所有列 -->
+		SELECT * FROM discussjiudianjianjie  discussjiudianjianjie
+		<!-- where 标签用于动态构建查询条件，1=1 是为了方便后续拼接条件 -->
+		<where> 1=1 ${ew.sqlSegment}</where>
 	</select>
-	
 
-</mapper>
+</mapper>
\ No newline at end of file