增加List类型转换成Varchar工具类(有bug)

pom.xml

@@ -50,18 +50,23 @@
             <scope>test</scope>
         </dependency>
 
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.12.0</version>
+        </dependency>
+
+       <!--   阿里云相关依赖     -->
         <dependency>
             <groupId>com.aliyun.oss</groupId>
             <artifactId>aliyun-sdk-oss</artifactId>
             <version>3.17.4</version>
         </dependency>
-
         <dependency>
             <groupId>com.aliyun</groupId>
             <artifactId>green20220302</artifactId>
             <version>3.0.1</version>
         </dependency>
-        
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>

src/main/java/com/bao/dating/handler/ListToVarcharTypeHandler.java

@@ -0,0 +1,66 @@
+package com.bao.dating.handler;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.ibatis.type.JdbcType;
+import org.apache.ibatis.type.MappedJdbcTypes;
+import org.apache.ibatis.type.MappedTypes;
+import org.apache.ibatis.type.TypeHandler;
+
+import java.sql.CallableStatement;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * List类型转换成Varchar类型
+ * @author KilLze
+ */
+@MappedJdbcTypes(JdbcType.VARCHAR)
+@MappedTypes(List.class)
+public class ListToVarcharTypeHandler implements TypeHandler<List<String>> {
+    @Override
+    public void setParameter(PreparedStatement preparedStatement, int i, List<String> strings, JdbcType jdbcType) throws SQLException {
+        // 遍历List类型的入参，拼装为String类型，使用Statement对象插入数据库
+        StringBuffer sb = new StringBuffer();
+        for (int j = 0; j < strings.size(); j++) {
+            if (j == strings.size() - 1) {
+                sb.append(strings.get(j));
+            } else {
+                sb.append(strings.get(j)).append(",");
+            }
+        }
+        preparedStatement.setString(i, sb.toString());
+    }
+
+    @Override
+    public List<String> getResult(ResultSet resultSet, String s) throws SQLException {
+        // 获取String类型的结果，使用","分割为List后返回
+        String resultString = resultSet.getString(s);
+        if (StringUtils.isNotEmpty(resultString)) {
+            return Arrays.asList(resultString.split(","));
+        }
+        return null;
+    }
+
+    @Override
+    public List<String> getResult(ResultSet resultSet, int i) throws SQLException {
+        // 获取String类型的结果，使用","分割为List后返回
+        String resultString = resultSet.getString(i);
+        if (StringUtils.isNotEmpty(resultString)) {
+            return Arrays.asList(resultString.split(","));
+        }
+        return null;
+    }
+
+    @Override
+    public List<String> getResult(CallableStatement callableStatement, int i) throws SQLException {
+        // 获取String类型的结果，使用","分割为List后返回
+        String resultString = callableStatement.getString(i);
+        if (StringUtils.isNotEmpty(resultString)) {
+            return Arrays.asList(resultString.split(","));
+        }
+        return null;
+    }
+}

src/main/resources/application.yml

@@ -5,7 +5,7 @@ spring:
   datasource:
     url: jdbc:mysql://114.55.250.24:3306/dating?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=GMT%2B8
     username: root
-    password: root
+    password: rJ6DBTYrFCpjdsxy2sBV
     driver-class-name: com.mysql.cj.jdbc.Driver
 
 # MyBatis 配置

src/main/resources/com/bao/dating/mapper/PostMapper.xml

@@ -1,8 +1,8 @@
 <?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">
-<mapper namespace="com.bao.dating.mapper.PostMapper">
 
+<mapper namespace="com.bao.dating.mapper.PostMapper">
     <!--  动态添加  -->
     <insert id="insert" useGeneratedKeys="true" keyProperty="id">
         INSERT INTO post
@@ -16,7 +16,10 @@
         </if>
         is_public, like_count, favorite_count, created_at, updated_at)
         VALUES
-        (#{userId}, #{content}, #{mediaOssKeys}, #{tags}, #{location}, #{isPublic}, 0, 0, #{created_at}, #{updated_at})
+        (#{userId}, #{content},
+         #{mediaOssKeys, typeHandler=com.bao.dating.handler.ListToVarcharTypeHandler},
+         #{tags, typeHandler=com.bao.dating.handler.ListToVarcharTypeHandler},
+         #{location}, #{isPublic}, 0, 0, #{createdAt}, #{updatedAt})
     </insert>
 
 </mapper>