<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[if_else1的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/if_else1</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; if_else1]]></copyright><item><title><![CDATA[Java ? ? : : ? : 表达式]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/118304470</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/118304470</guid><author>if_else1</author><pubDate>Mon, 28 Jun 2021 15:16:32 +0800</pubDate><description><![CDATA[### 例如:

boolean a=false;

boolean b=true;

boolean c=false;

表达式  a?b?1:2:c?3:4 的含义是什么

答案:

 System.out.println(a?b?1:2:c?3:4);

 // 输出4

分析结果

等同于


if (a) {
    if (b) {
        System.out.println(1);
    } else {
        System.out.println(1...]]></description><category></category></item><item><title><![CDATA[nacos-server-2.0.0.zip  Mysql8.0 !!!!!!!!!!!!!!!!!!!!!!!!!!]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/115395647</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/115395647</guid><author>if_else1</author><pubDate>Fri, 02 Apr 2021 12:16:36 +0800</pubDate><description><![CDATA[https://www.yuque.com/docs/share/96edb67d-4aba-45dc-90f8-d6c1b231c2e9?# 《Nacos》
]]></description><category></category></item><item><title><![CDATA[递归示例生成A——Z版本号的工具类]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/114859812</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/114859812</guid><author>if_else1</author><pubDate>Tue, 16 Mar 2021 00:19:35 +0800</pubDate><description><![CDATA[public class GenerateVersionNumberUtil {

    //现在版本只使用A——Z
    //用来判断是否版本号是否重复。
    //如果重复，版本更替到下一个字母
    static List&lt;Character&gt; list = new ArrayList&lt;&gt;();

    public static String create(int num) {
        list.add('A');
        list.add('B')]]></description><category></category></item><item><title><![CDATA[Java IO读写、字符流和字节流的区别和使用场景]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/113887353</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/113887353</guid><author>if_else1</author><pubDate>Sat, 20 Feb 2021 17:10:18 +0800</pubDate><description><![CDATA[文件类型

IO读写按照类型可以分为，字符流和字节流


一个字符=两个字节 一个字节=八位

一个中文占两个字节（GBK编码下）

一个中文占3or4个字节（UTF-8编码下）


1.纯文本类型

纯文本（TXT）读写使用，字符流。

字符流一般用来读取纯文本文件，一次读取两个字节。

字符流（Char）可以直接读取中文不会乱码。但不能使用字符流读取别的格式内容。例如图片，MP4。

字符流有缓冲区。

在Reader/Writer中单向流动

2.其他

字节流（Baty）可以读取任何格式文件。

字]]></description><category></category></item><item><title><![CDATA[ScheduledFuture 定时任务工具类]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/111375776</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/111375776</guid><author>if_else1</author><pubDate>Fri, 18 Dec 2020 16:02:16 +0800</pubDate><description><![CDATA[package com.example.demo.task;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.*;

/**
 * @Author 白居易
 * @Date 2020/12/18 15:54
 * @Version 1.0
 */
public class TimingTask {
    private static final Concu.]]></description><category></category></item><item><title><![CDATA[influxDB2.0  使用influx telegrafs远程管理telegraf]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/109776974</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/109776974</guid><author>if_else1</author><pubDate>Wed, 18 Nov 2020 16:44:55 +0800</pubDate><description><![CDATA[登录influxDB的管理端

管理端：data-----&gt;telegraf 创建一个默认的telegraf.conf 不能在终端直接修改



然后在控制台使用influx telegrafs 去更新telegraf.conf。



influx telegrafs update --id xxxxxx   --org-id xxxxxx  --name telegraf创建时候的名字    --description  " 描述" ...]]></description><category></category></item><item><title><![CDATA[Redis+Aop注解 实现控制接口访问的频率]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/109225773</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/109225773</guid><author>if_else1</author><pubDate>Thu, 22 Oct 2020 16:56:03 +0800</pubDate><description><![CDATA[示例地址

https://github.com/JavaXuPei/JavaDemo/tree/master
]]></description><category></category></item><item><title><![CDATA[Java  Json文件转成对象 。 转义符。反斜杠报错]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/108979672</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/108979672</guid><author>if_else1</author><pubDate>Fri, 09 Oct 2020 15:37:00 +0800</pubDate><description><![CDATA[import cn.hutool.core.io.file.FileReader;
import com.alibaba.fastjson.JSON;
import com.api.apitools.dto.ApiDto;
import com.api.apitools.dto.InterfaceApiDto;
import com.api.apitools.dto.ItemDto;



FileReader fileReader = new FileReader("RAP-xxxxxxxx.json".]]></description><category></category></item><item><title><![CDATA[threejs  引入图片资源报跨域异常]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/108855942</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/108855942</guid><author>if_else1</author><pubDate>Mon, 28 Sep 2020 19:37:24 +0800</pubDate><description><![CDATA[问题：three.js 引入图片资源报跨域一样。



网上修改源码，方法在我尝试下，没用。

看了一下官方的示例，发现官方使用的oss上的图片。

我也换成了oss服务上的https图片资源路径。试了一下。还是报错  nb。

解决方法：



需要在oss上配置跨域*。

这个应该是核心的问题。



问题解决。



我正好有oss服务器，所以别的方法没有试过。

猜测nginx 配置


add_header 'Access-Control-Allow-Origin' '*';
add_hea...]]></description><category></category></item><item><title><![CDATA[Bootstrap可视化布局系统需要引入的静态资源]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/108754467</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/108754467</guid><author>if_else1</author><pubDate>Wed, 23 Sep 2020 15:52:39 +0800</pubDate><description><![CDATA[Bootstrap可视化布局系统https://www.bootcss.com/p/layoutit/

拖拽好页面之后，下载保存好html

放入body中





地址

https://github.com/JavaXuPei/bootcss




]]></description><category></category></item><item><title><![CDATA[CreateProcess error=193, %1 is not a valid Win32 application]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/108662017</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/108662017</guid><author>if_else1</author><pubDate>Fri, 18 Sep 2020 11:31:00 +0800</pubDate><description><![CDATA[错误：Failed to execute goal com.github.eirslett:frontend-maven-xxxxxxxx

 可以执行 mvn clean package -e 查看，会执行打包并显示更详细的错误信息

 错误信息为CreateProcess error=193, %1 is not a valid Win32 application。

frontend-maven-plugin的gtihub上有关于着个错误的解释

 https://github.co...]]></description><category></category></item><item><title><![CDATA[宝塔PostgreSql管理器安装数据库远程访问]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/108384101</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/108384101</guid><author>if_else1</author><pubDate>Thu, 03 Sep 2020 15:27:52 +0800</pubDate><description><![CDATA[客户端认证添加

host  all       all       0.0.0.0/0        md5
]]></description><category></category></item><item><title><![CDATA[ThingsBoard社区版源码打包运行]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/107863435</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/107863435</guid><author>if_else1</author><pubDate>Fri, 07 Aug 2020 16:43:41 +0800</pubDate><description><![CDATA[参考资料

https://www.cnblogs.com/iotschool/p/12422629.html
https://blog.youkuaiyun.com/IoTSchool/article/details/104706757

本次运行的是 postgres版本的
下载源码

git地址    https://github.com/thingsboard/thingsboard.git

安装postgres数据库

数据库要求是11或者以上的。使用了其中的特性。

修改配置文件

根目录pom.xml中]]></description><category></category></item><item><title><![CDATA[生成用户默认头像]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/107109228</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/107109228</guid><author>if_else1</author><pubDate>Fri, 03 Jul 2020 16:53:46 +0800</pubDate><description><![CDATA[生成用户默认头像
   /**
     * 生成随机默认头像保存在本地
     */
    @Test
    public void getPng(){
        String simpleUUID = IdUtil.simpleUUID();
        StringBuilder stringBuilder=new StringBuilder();
        stringBuilder.append("https://www.gravatar.com/avatar/")
    ]]></description><category></category></item><item><title><![CDATA[参数加密/解密]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/106546706</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/106546706</guid><author>if_else1</author><pubDate>Thu, 04 Jun 2020 15:00:52 +0800</pubDate><description><![CDATA[依赖
&lt;dependency&gt;
    &lt;groupId&gt;cn.hutool&lt;/groupId&gt;
    &lt;artifactId&gt;hutool-all&lt;/artifactId&gt;
    &lt;version&gt;5.3.7&lt;/version&gt;
&lt;/dependency&gt;

import cn.hutool.crypto.SecureUtil;
import cn.hutool.crypto.symmetric.AES;
]]></description><category></category></item><item><title><![CDATA[java.lang.IllegalArgumentException: SimpleMessageConverter only supports String, byte[] and Serializ]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/100894166</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/100894166</guid><author>if_else1</author><pubDate>Mon, 16 Sep 2019 17:06:30 +0800</pubDate><description><![CDATA[看看实体类有没有序列化


public class User implements Serializable
]]></description><category></category></item><item><title><![CDATA[微信 redirect_uri参数错误 原因之一]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/100544109</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/100544109</guid><author>if_else1</author><pubDate>Wed, 04 Sep 2019 17:51:04 +0800</pubDate><description><![CDATA[redirect_uri http://xxxxxx.com/

不能有端口号

链接的参数顺序不对
]]></description><category></category></item><item><title><![CDATA[& 运算符来判断奇数还是偶数  sql判断奇数还是偶数]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/100126136</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/100126136</guid><author>if_else1</author><pubDate>Wed, 28 Aug 2019 20:24:56 +0800</pubDate><description><![CDATA[3&amp;1 返回 1

2&amp;1 返回0

0&amp;1 返回 0
]]></description><category></category></item><item><title><![CDATA[第一次了解快速排序]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/100040987</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/100040987</guid><author>if_else1</author><pubDate>Fri, 23 Aug 2019 16:23:45 +0800</pubDate><description><![CDATA[初始化数组

 int[] arrays={45,80,55,40,42,85};

  arrays[0]为基数  

  快速排序第一次

  从后先向前   找比基数小的交换位置

  42 80 55 40 45 85

  从前先向后  找比基数大的交换位置

  42 45 55 40 80 85

...]]></description><category></category></item><item><title><![CDATA[vue   点赞+收藏  图标]]></title><link>https://blog.youkuaiyun.com/if_else1/article/details/98669213</link><guid>https://blog.youkuaiyun.com/if_else1/article/details/98669213</guid><author>if_else1</author><pubDate>Tue, 06 Aug 2019 22:22:41 +0800</pubDate><description><![CDATA[vuecli3+fontawesome图标+animate.css动画



GIF

 码云：https://gitee.com/baijuyi/vue_clicks_on_collection_icons.git
]]></description><category></category></item></channel></rss>