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package com.cntool.core.teat;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * @program: cntool
 * @description: 配置文件工具类
 * @author: ID-Tang
 * @create: 2022-01-21 10:12
 * @copyright: Copyright (c) [2022] [ID-tang]
 * [cntool] is licensed under Mulan PSL v2.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 * http://license.coscl.org.cn/MulanPSL2
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PSL v2 for more details.
 **/
public class PropertiesUtils {
    /**
     * properties
     */
    private static Properties properties = null;

    /**
     * 根据key获取value值
     *
     * @param key 配置文件key
     * @return value值
     */
    public static String getValue(String key) {
        if (properties == null) {
            properties = loadConfProperties();
        }
        String value = properties.getProperty(key);
        System.out.println("从配置文件读取参数： " + key + " -->> " + value);
        return value;
    }

    /**
     * 初始化propertiies
     *
     * @return Properties
     */
    public static Properties loadConfProperties() {
        Properties properties = new Properties();
        InputStream in = null;

        // 优先从项目路径获取连接信息
        String confPath = System.getProperty("user.dir");
        confPath = confPath + File.separator + "application.properties";
        File file = new File(confPath);
        if (file.exists()) {
            System.out.println("配置文件路径---->>" + confPath);
            try {
                in = new FileInputStream(confPath);
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        // 未传入路径时，读取classpath路径
        else {
            System.out.println("项目路径[" + confPath + "]下无连接信息，从classpath路径下加载");
            in = PropertiesUtils.class.getClassLoader().getResourceAsStream("application.properties");
        }
        try {
            properties.load(in);
        } catch (IOException e) {
            e.printStackTrace();
        }

        return properties;
    }
}