jdbc.driver=com.mysql.jdbc.Driver

jdbc.url=jdbc:mysql://localhost:3306/future?useUnicode=true&characterEncoding=utf-8

jdbc.username=root

jdbc.password=root

package cn.xiaobing.util;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.Properties;

public class PropertiesDemo01 {

    /**

     * 读取解析properties文件

     */

    public static void readProperties() {

        //java.util包下专门做properties文件解析的类=》Properties

        Properties properties = new Properties();

        File file = new File("src/test/resources/jdbc.properties");

        //判断文件是否存在

        if(file.exists()) {

            InputStream inStream = null;

            try {

                inStream = new FileInputStream(file);

                //通过调用Properties的load方法，实现文件的加载、解析

                properties.load(inStream);

            } catch (Exception e) {

                e.printStackTrace();

            }finally {

                if(inStream != null) {

                    try {

                        inStream.close();//关闭流

                    } catch (IOException e) {

                        e.printStackTrace();

                    }

                }

            }

            String url = properties.getProperty("jdbc.url");

            System.out.println("url:"+url);

            System.out.println("username:"+properties.getProperty("jdbc.username"));

            System.out.println("password:"+properties.getProperty("jdbc.password"));

        }else {

            System.out.println("properties文件未找到，请核对提供文件路径！");

        }

    }

    public static void main(String[] args) {

        readProperties();

    }

}