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public class ShareClose {
    private Integer id;

    private String tsCode;

    private JSONObject close;
}

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import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedJdbcTypes;
import org.apache.ibatis.type.MappedTypes;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import com.alibaba.fastjson.JSONObject;
import org.springframework.context.annotation.Description;


@MappedTypes(JSONObject.class)
@MappedJdbcTypes(JdbcType.LONGVARCHAR)
public class JsonObjectTypeHandler extends BaseTypeHandler<JSONObject> {

    /**
     * 设置非空参数
     * @param ps
     * @param i
     * @param parameter
     * @param jdbcType
     * @throws SQLException
     */
    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, JSONObject parameter, JdbcType jdbcType) throws SQLException {
        ps.setString(i, String.valueOf(parameter.toJSONString()));
    }

    /**
     * 根据列名，获取可以为空的结果
     * @param rs
     * @param columnName
     * @return
     * @throws SQLException
     */
    @Override
    public JSONObject getNullableResult(ResultSet rs, String columnName) throws SQLException {
        String sqlJson = rs.getString(columnName);
        if (null != sqlJson){
            return JSONObject.parseObject(sqlJson);
        }
        return null;
    }

    /**
     * 根据列索引，获取可以为空的结果
     * @param rs
     * @param columnIndex
     * @return
     * @throws SQLException
     */
    @Override
    public JSONObject getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        String sqlJson = rs.getString(columnIndex);
        if (null != sqlJson){
            return JSONObject.parseObject(sqlJson);
        }
        return null;
    }

    @Override
    public JSONObject getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        String sqlJson = cs.getString(columnIndex);
        if (null != sqlJson){
            return JSONObject.parseObject(sqlJson);
        }
        return null;
    }
}

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<resultMap id="ResultMapWithBLOBs" type="com.ms.quanplat.bean.ShareClose">
    <constructor>
        <idArg column="id" javaType="java.lang.Integer" jdbcType="INTEGER" />
        <arg column="ts_code" javaType="java.lang.String" jdbcType="VARCHAR" />
        <arg column="close" javaType="com.alibaba.fastjson.JSONObject" jdbcType="LONGVARCHAR" typeHandler="com.ms.quanplat.config.handler.JsonObjectTypeHandler"/>
    </constructor>
</resultMap>

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mybatis:
  type-handlers-package: com.ms.quanplat.config.handler