HydrangeaPurple

public class ConfigUtils {
    public static String getGroupId() {
        String property = SystemProperties.getProperty("dep.bss.cloud.groupId");
        if (ObjectIsNull.check(property)) {
            throw new RuntimeException("groupId 未在tomcat配置文件中配置");
        }
        return property;
    }
}

HydrangeaPurple

package com.example.demo;

import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;

HydrangeaPurple

# !/usr/bin/python3
# encoding: utf-8

import RPi.GPIO
import time

RPi.GPIO.setwarnings(False)
RPi.GPIO.setmode(RPi.GPIO.BCM)
RPi.GPIO.setup(14, RPi.GPIO.OUT)

HydrangeaPurple

##### hostapd configuration file ##############################################
# Empty lines and lines starting with # are ignored

# AP netdevice name (without 'ap' postfix, i.e., wlan0 uses wlan0ap for
# management frames with the Host AP driver); wlan0 with many nl80211 drivers
interface=wlan0

# In case of atheros and nl80211 driver interfaces, an additional
# configuration parameter, bridge, may be used to notify hostapd if the
# interface is included in a bridge. This parameter is not used with Host AP

HydrangeaPurple

public class Main {
    public static void main(String[] args) {

      User axin = new User();
      User.School school = new User.School();
      axin.setName("hello");

      // 1. 基本调用
      String value1 = OptionalBean.ofNullable(axin)
              .getBean(User::getSchool)

HydrangeaPurple

/**
 * 
 * 全局加载jvm黑体字体
 *  
 * @author chengyq
 *
 */
@Component
@Order(1)
public class FontLoaderRunner implements CommandLineRunner {

HydrangeaPurple

import org.apache.commons.codec.binary.Hex;

import java.io.*;
import java.security.MessageDigest;
import java.util.*;

public class FilesUtil {

	/**
	 * 

HydrangeaPurple

package com.exapmle
import java.util.ArrayList;
import java.util.HashMap;

/**
 * 强转泛型集合防止警告
 *
 * @author chengyiqun
 * @version V1.0
 * @date 2021/7/22 17:10

HydrangeaPurple

/**
 * 判断操作系统
 *
 * @author chengyiqun
 * @version V1.0
 * @date 2021/7/15 11:07
 */
public class JudgeSystemUtils {
    public static boolean isLinux() {
        return System.getProperty("os.name").toLowerCase().contains("linux");

HydrangeaPurple

package com.tydic.service.util;

import org.springframework.core.env.Environment;

import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;