/*
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* Copyright [2020-2030] [https://www.stylefeng.cn]
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Guns采用APACHE LICENSE 2.0开源协议，您在使用过程中，需要注意以下几点：
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*
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* 1.请不要删除和修改根目录下的LICENSE文件。
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* 2.请不要删除和修改Guns源码头部的版权声明。
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* 3.请保留源码和相关描述文件的项目出处，作者声明等。
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* 4.分发源码时候，请注明软件出处 https://gitee.com/stylefeng/guns
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* 5.在修改包名，模块名称，项目代码等时，请注明软件出处 https://gitee.com/stylefeng/guns
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* 6.若您的项目无法满足以上几点，可申请商业授权
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*/
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package cn.stylefeng.roses.kernel.db.init.util;
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import lombok.extern.slf4j.Slf4j;
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import java.sql.ResultSet;
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import java.sql.ResultSetMetaData;
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import java.sql.SQLException;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* sql语句工具类
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*
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* @author fengshuonan
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* @date 2016年12月6日 下午1:01:54
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*/
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@Slf4j
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public class SqlUtil {
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/**
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* 根据集合的大小，输出相应个数"?"
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*
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* @author fengshuonan
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*/
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public static String parse(List<?> list) {
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String str = "";
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if (list != null && list.size() > 0) {
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str = str + "?";
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for (int i = 1; i < list.size(); i++) {
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str = str + ",?";
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}
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}
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return str;
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}
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/**
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* 结果集转化为map
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*
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* @author fengshuonan
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* @date 2020/1/29 6:12 下午
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*/
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public static Map<String, Object> resultSet2Map(ResultSet resultSet) {
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try {
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HashMap<String, Object> result = new HashMap<>();
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ResultSetMetaData metaData = resultSet.getMetaData();
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for (int i = 1; i <= metaData.getColumnCount(); i++) {
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String columnName = metaData.getColumnName(i);
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Object columnValue = resultSet.getObject(i);
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result.put(columnName, columnValue);
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}
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return result;
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} catch (SQLException e) {
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log.error("转化结果集错误！", e);
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//返回空map
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return new HashMap<>();
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}
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}
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/**
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* 结果集转化为map
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*
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* @author fengshuonan
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* @date 2020/1/29 6:12 下午
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*/
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public static List<Map<String, Object>> resultSet2ListMap(ResultSet resultSet) {
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ArrayList<Map<String, Object>> result = new ArrayList<>();
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try {
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while (resultSet.next()) {
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Map<String, Object> map = resultSet2Map(resultSet);
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result.add(map);
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}
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return result;
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} catch (SQLException e) {
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log.error("转化结果集错误！", e);
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//返回空map
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return result;
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}
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}
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}
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