From e9dd35431afde77d04286f63f1b61ea8b7e13dc1 Mon Sep 17 00:00:00 2001
From: veltuss <1551206259@qq.com>
Date: Fri, 6 May 2022 13:08:03 +0800
Subject: [PATCH] =?UTF-8?q?=E7=9F=A5=E8=AF=86=E7=A7=91=E6=99=AE=E6=9F=A5?=
 =?UTF-8?q?=E8=AF=A2?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/java/com/nav/dao/KnowledgeDao.java   | 38 +++++++++++++++++++
 .../src/main/java/com/nav/pojo/Knowledge.java | 28 ++++++++++++++
 .../main/resources/mapper/KnowledgeMapper.xml | 25 ++++++++++++
 3 files changed, 91 insertions(+)
 create mode 100644 backend/src/main/java/com/nav/dao/KnowledgeDao.java
 create mode 100644 backend/src/main/java/com/nav/pojo/Knowledge.java
 create mode 100644 backend/src/main/resources/mapper/KnowledgeMapper.xml

diff --git a/backend/src/main/java/com/nav/dao/KnowledgeDao.java b/backend/src/main/java/com/nav/dao/KnowledgeDao.java
new file mode 100644
index 0000000..821264a
--- /dev/null
+++ b/backend/src/main/java/com/nav/dao/KnowledgeDao.java
@@ -0,0 +1,38 @@
+package com.nav.dao;
+
+import com.nav.pojo.Knowledge;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.apache.ibatis.annotations.Mapper;
+
+import java.util.List;
+
+/**
+ * @ClassName KnowledgeDao
+ * @Description KnowledgeDao
+ * @Date 2022/5/6 11:39
+ * @Author hck
+ */
+@Mapper
+public interface KnowledgeDao {
+    /**
+     * 查找所有干货
+     * @return List<Knowledge>
+     */
+    public List<Knowledge> selectAllKnowledge();
+
+    /**
+     * 将科普用时间顺序排序
+     * @param id
+     * @return List<Knowledge>
+     */
+    public List<Knowledge> selectKnowledgeByDate(String id);
+
+    /**
+     * 将科普用浏览量排序
+     * @param id
+     * @return
+     */
+    public List<Knowledge> selectKnowledgeByViewCount(String id);
+}
diff --git a/backend/src/main/java/com/nav/pojo/Knowledge.java b/backend/src/main/java/com/nav/pojo/Knowledge.java
new file mode 100644
index 0000000..7ae8a2e
--- /dev/null
+++ b/backend/src/main/java/com/nav/pojo/Knowledge.java
@@ -0,0 +1,28 @@
+package com.nav.pojo;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.Date;
+
+/**
+ * @ClassName Knowledge
+ * @Description Knowledge
+ * @Date 2022/5/6 11:36
+ * @Author hck
+ */
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class Knowledge {
+    private long id;
+    private String title;
+    private Date postDate;
+    private String source;
+    private String content;
+    private int kind;
+    private int viewCount;
+    private Date gmtCreate;
+    private Date gmtModified;
+}
diff --git a/backend/src/main/resources/mapper/KnowledgeMapper.xml b/backend/src/main/resources/mapper/KnowledgeMapper.xml
new file mode 100644
index 0000000..0513d81
--- /dev/null
+++ b/backend/src/main/resources/mapper/KnowledgeMapper.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.nav.dao.KnowledgeDao">
+    <select id="selectAllknowledge"  resultType="com.nav.pojo.Knowledge">
+        select *
+        from knowledge
+    </select>
+
+    <select id="selectknowledgeByDate"  resultType="com.nav.pojo.Knowledge">
+        select *
+        from knowledge
+        where kind = #{id}
+        order by postDate desc
+    </select>
+
+    <select id="selectknowledgeByDate"  resultType="com.nav.pojo.Knowledge">
+        select *
+        from knowledge
+        where kind = #{id}
+        order by viewCount desc
+    </select>
+
+</mapper>
\ No newline at end of file
-- 
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