项目代码中加载 配置文件

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class T3 {
    public static void main(String[] args) throws IOException {
        getProperties();
    }

    private static void getProperties() throws IOException {
        //加载项目根目录（或者maven项目的resource目录）下的config.properties文件为流
        InputStream inputStream = T3.class.getClassLoader().getResourceAsStream("config.properties");
        //创建p对象
        Properties properties = new Properties();
        //p对象加载流
        properties.load(inputStream);
        inputStream.close();
        System.out.println("name:" + properties.getProperty("name"));
        System.out.println("id:" + properties.getProperty("id"));
    }
}
 

config.properties文件内容：（字符串不用加引号）

name=haha;
id = 123;