pom.xml

//tkmybatis依赖
<dependency>
    <groupId>tk.mybatis</groupId>
    <artifactId>mapper-spring-boot-starter</artifactId>
    <version>2.1.5</version>
</dependency>
<dependency>
    <groupId>tk.mybatis</groupId>
    <artifactId>mapper</artifactId>
    <version>4.1.5</version>
</dependency>

实体类

//后面贴JsonTypeHandler代码
import com.demo.handler.JsonTypeHandler;
import tk.mybatis.mapper.annotation.ColumnType;

/**
  * BeanExt中的属性是json中的key
  */
@Column(name = "column_name")
@ColumnType(typeHandler = JsonTypeHandler.class)
private List<BeanExt> beanList;


/**
  * BeanExt代码，以json中key的name创建属性
  */
public class BeanExt {

    private String id;

    private String name;

}

JsonTypeHandler

package com.demo.handler;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

public class JsonTypeHandler extends BaseTypeHandler<Object> {

    private final Class<?> type;

    public JsonTypeHandler(Class<?> type) {
        this.type = type;
    }

    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, Object t, JdbcType jdbcType) throws SQLException {
        ps.setObject(i, JSON.toJSONString(t), 1111);
    }

    @Override
    public Object getNullableResult(ResultSet rs, String columnName) throws SQLException {
        return toJavaObject(rs.getString(columnName));
    }

    @Override
    public Object getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        return toJavaObject(rs.getString(columnIndex));
    }

    @Override
    public Object getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        return toJavaObject(cs.getString(columnIndex));
    }

    protected Object toJavaObject(String columnValue) {
        if (type.getName().equals(JSONArray.class.getName()) || type.getName().equals(List.class.getName())) {
            return JSON.toJavaObject(JSON.parseArray(columnValue), type);
        }
        return JSON.toJavaObject(JSON.parseObject(columnValue), type);
    }

}

mybatis.xml

<resultMap id="BaseResultMap" type="com.demo.bean.Bean">
	<result column="column_name" javaType="com.demo.bean.Bean"
            typeHandler="com.demo.handler.JsonTypeHandler" property="beanList" />
</resultMap>

tkmybatis快捷新增方法

mapper.insert(bean);

数据库效果展示