<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[25k董的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/Dbbbbbbbbb</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; Dbbbbbbbbb]]></copyright><item><title><![CDATA[linux中安装zookeeper]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/100041970</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/100041970</guid><author>Dbbbbbbbbb</author><pubDate>Fri, 23 Aug 2019 16:47:40 +0800</pubDate><description><![CDATA[https://yq.aliyun.com/articles/662422

]]></description><category></category></item><item><title><![CDATA[centos7安装mysql5.6记录]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/100034686</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/100034686</guid><author>Dbbbbbbbbb</author><pubDate>Fri, 23 Aug 2019 14:40:49 +0800</pubDate><description><![CDATA[1、下载安装包

选择版本

选择操作平台

下载（64位）
2 安装：
https://blog.youkuaiyun.com/qq_17776287/article/details/53536761
可能遇到问题：

解决方法：yum install -y libaio
问题链接：https://blog.youkuaiyun.com/eagle89/article/details/78411184

...]]></description><category></category></item><item><title><![CDATA[Linux中使用yum安装jdk]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/100007953</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/100007953</guid><author>Dbbbbbbbbb</author><pubDate>Thu, 22 Aug 2019 09:37:39 +0800</pubDate><description><![CDATA[Linux中使用yum命令安装jdk
https://www.cnblogs.com/zqyanywn/p/10812870.html

]]></description><category></category></item><item><title><![CDATA[redis链接不上，报保护模式]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/88666301</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/88666301</guid><author>Dbbbbbbbbb</author><pubDate>Tue, 19 Mar 2019 16:45:55 +0800</pubDate><description><![CDATA[错误信息：
DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only ...]]></description><category></category></item><item><title><![CDATA[solr连接数据库的部分]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/86554358</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/86554358</guid><author>Dbbbbbbbbb</author><pubDate>Sat, 19 Jan 2019 17:04:01 +0800</pubDate><description><![CDATA[https://blog.youkuaiyun.com/GY325416/article/details/79655173

]]></description><category></category></item><item><title><![CDATA[spring mvc  实现文件上传（含多文件上传）]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/86475164</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/86475164</guid><author>Dbbbbbbbbb</author><pubDate>Mon, 14 Jan 2019 12:04:40 +0800</pubDate><description><![CDATA[https://blog.youkuaiyun.com/SwingPyzf/article/details/20230865

]]></description><category></category></item><item><title><![CDATA[同一台服务器配置多个tomcat]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/86464773</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/86464773</guid><author>Dbbbbbbbbb</author><pubDate>Mon, 14 Jan 2019 08:18:06 +0800</pubDate><description><![CDATA[https://blog.youkuaiyun.com/qq_39056805/article/details/80375386

]]></description><category></category></item><item><title><![CDATA[tomcat配置manager app 账号和密码 的方法]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/86464661</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/86464661</guid><author>Dbbbbbbbbb</author><pubDate>Mon, 14 Jan 2019 08:13:54 +0800</pubDate><description><![CDATA[https://www.linuxidc.com/Linux/2017-12/149798.htm

]]></description><category></category></item><item><title><![CDATA[centos7下安装mysql（非常的牛皮）]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84679661</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84679661</guid><author>Dbbbbbbbbb</author><pubDate>Sat, 01 Dec 2018 23:02:04 +0800</pubDate><description><![CDATA[点我就完事了

]]></description><category></category></item><item><title><![CDATA[springioc]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84668466</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84668466</guid><author>Dbbbbbbbbb</author><pubDate>Fri, 30 Nov 2018 21:48:22 +0800</pubDate><description><![CDATA[第一部分 springIoc
1、使用spring创建UserService对象
public interface UserService {
    public String getInfo(String name);
}

public class UserServiceImpl implements UserService {
    public String getInfo(Strin...]]></description><category></category></item><item><title><![CDATA[linux7下添加端口号]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84556284</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84556284</guid><author>Dbbbbbbbbb</author><pubDate>Mon, 26 Nov 2018 20:54:24 +0800</pubDate><description><![CDATA[https://blog.youkuaiyun.com/realjh/article/details/82048492

]]></description><category></category></item><item><title><![CDATA[集合（一）]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84496679</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84496679</guid><author>Dbbbbbbbbb</author><pubDate>Sun, 25 Nov 2018 16:43:07 +0800</pubDate><description><![CDATA[1、如果一个类实现了Serializable，则如果在某个属性上面添加关键字transient  ，则这个属性就不会被序列化。
第一个：ArrayList
2、关于集合，应该关注的点：

是否允许空
是否允许重复数据
是否有序，有序的意思是读取数据的顺序和存放数据的顺序是否一致
是否线程安全

ArrayList
1、 ArrayList就是一个以数组形式实现的集合
2、对于ArrayList，构...]]></description><category></category></item><item><title><![CDATA[java虚拟机（一）]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84404227</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84404227</guid><author>Dbbbbbbbbb</author><pubDate>Fri, 23 Nov 2018 22:00:12 +0800</pubDate><description><![CDATA[1、Hotspot
Hotspot是交心的java虚拟机，用来代替JIT（Just in Time），可以大大提高java运行的性能
Java原先把源代码便以为字节码在虚拟机执行，这样执行效率较慢，而Hotspot将常用的部分代码便以为本地（原生，native-）代码，这样显著提高了性能
2、

（1）程序计数器
线程私有的内存空间，服务于线程的函数调用栈，可以存储一个字长大小的数据，从而实现类似...]]></description><category></category></item><item><title><![CDATA[linux系统下mysql 5.7密码太复杂，想改成简单的]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84350350</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84350350</guid><author>Dbbbbbbbbb</author><pubDate>Thu, 22 Nov 2018 22:44:56 +0800</pubDate><description><![CDATA[建议加精

]]></description><category></category></item><item><title><![CDATA[内部类]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84350013</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84350013</guid><author>Dbbbbbbbbb</author><pubDate>Thu, 22 Nov 2018 22:21:21 +0800</pubDate><description><![CDATA[1、成员内部类
1、成员内部类的权限可以使public  、private 、protected 、 default
     和外部类的普通成员一样
2、成员内部类可以访问外部类的成员变量和方法，包括私有，但是外部类不可以随便访问内部类的属性和方法
3、在外部创建内部类对象的方法，有两种
class OneOut{

    public static void main(String[] ar...]]></description><category></category></item><item><title><![CDATA[内部类访问外部类的局部变量只能是final]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84348381</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84348381</guid><author>Dbbbbbbbbb</author><pubDate>Thu, 22 Nov 2018 20:34:05 +0800</pubDate><description><![CDATA[public class InnerCalss {

    private  String name = &quot;张三&quot;;

    @Test
    public  void out(){
        String gender = &quot;娜娜&quot;;
        class Inner{
            int in = 1;
            public void show()...]]></description><category></category></item><item><title><![CDATA[多线程（三）]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84331959</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84331959</guid><author>Dbbbbbbbbb</author><pubDate>Wed, 21 Nov 2018 23:16:48 +0800</pubDate><description><![CDATA[1、如何在java中创键线程
1、继承Thread类，重写run方法
2、实现Runnable接口，重写run方法，实现Runnable接口的实现类的实例对象作为Thread构造函数的target
3、通过Callable和Future Task创键线程
4、通过线程池创键线程

通过实现Callable接口实现多线程
1、创键Callable接口的实现类，并实现Call方法
2、创键Callab...]]></description><category></category></item><item><title><![CDATA[多线程（二）]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84311674</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84311674</guid><author>Dbbbbbbbbb</author><pubDate>Tue, 20 Nov 2018 23:12:40 +0800</pubDate><description><![CDATA[1、 synchronized ：synchronized用于解决同步问题，当有多条线程同时访问共享数据时，如果不进行同步，就会发生错误，java提供的解决方案是：只要将操作共享数据的语句在某一时段让一个线程执行完，在执行过程中，其他线程不能进来执行可以。解决这个问题。这里在用synchronized时会有两种方式，一种是上面的同步方法，即用synchronized来修饰方法，另一种是提供的同步代...]]></description><category></category></item><item><title><![CDATA[多线程（一）]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84310885</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84310885</guid><author>Dbbbbbbbbb</author><pubDate>Tue, 20 Nov 2018 22:11:07 +0800</pubDate><description><![CDATA[1、进程和线程
线程只是一个静态的概念，机器上的一个.class 文件，机器上的一个exe文件，这个叫做一个进程，程序的执行过程：首先把程序的代码放到内存的代码区里面，代码放到代码区后并没有马上开始执行，但这时候说明了一个进程准备开始，进程已经产生，但是还没有开始执行，这就是进程，所以进程其实是一个静态的概念，它本身就不能动，平常所说的进程的执行指的是进程里面主线程开始执行了，也就是main方法开...]]></description><category></category></item><item><title><![CDATA[错误总结（一）]]></title><link>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84308555</link><guid>https://blog.youkuaiyun.com/Dbbbbbbbbb/article/details/84308555</guid><author>Dbbbbbbbbb</author><pubDate>Tue, 20 Nov 2018 19:42:09 +0800</pubDate><description><![CDATA[1、使用resultmap一直报一个错误
关键词 nullPointerException
10、### Error querying database.  Cause: java.lang.NullPointerException
11、### The error may exist in com/qf/fayuan/mapper/NewsMapper.xml
12、### The error ...]]></description><category></category></item></channel></rss>