Java基础之java获取上下文与java获取配置文件

package com;

import java.util.ResourceBundle;
public class ReadProperties {

    public static ResourceBundle resourceBundle = ResourceBundle.getBundle("app");

    public static String get(String key) {
        return resourceBundle.getString(key);
    }

    public static String getIp() {
        return ReadProperties.get("ip");
    }

    public static void main(String[] args) {
        String ip = ReadProperties.getIp();
        System.out.println(ip);
        String appContext = System.getProperty("user.dir");
        System.out.println(appContext);
    }

}

 1、java可以通过ResourceBundle.getBundle("app")直接获取到资源文件

2、java可以通过System.getProperty("user.dir")获取到项目的上下文