<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[jeffhymm的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/jeffhymm</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; jeffhymm]]></copyright><item><title><![CDATA[一张空白纸]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/124472016</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/124472016</guid><author>jeffhymm</author><pubDate>Thu, 28 Apr 2022 13:38:54 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[linux 常规实践命令大全及详解]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/105385819</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/105385819</guid><author>jeffhymm</author><pubDate>Wed, 08 Apr 2020 13:36:37 +0800</pubDate><description><![CDATA[1.查询命令

1.查看服务器操作系统 ：

cat /etc/issue ；

cat /proc/version

2.查看CPU个数：

cat /proc/cpuinfo|grep "processor"|wc -l

3.查看内存大小: 

cat /proc/meminfo|grep "MemTotal"

4.查看网络参数: 

cat /etc/sysctl.conf |gr...]]></description><category></category></item><item><title><![CDATA[Linux系统常用的关机或重启命令shutdown、reboot、halt、poweroff、init 0及init 6的联系与区别]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/102893333</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/102893333</guid><author>jeffhymm</author><pubDate>Mon, 04 Nov 2019 11:19:02 +0800</pubDate><description><![CDATA[Linux下常用的关机/重启命令一般包括：

shutdown、reboot、halt、poweroff等，当然了我们可以使用init 运行等级runlevel 0即halt来关机，或使用init 运行等级runlevel 6即reboot来执行重启。

当然了这些关机或重启的方式也有一些细微差别。

首先明确一下linux/redhat系的runlevel运行级别和debian系的runl...]]></description><category></category></item><item><title><![CDATA[ssh之iDEA使用maven整合实现数据的增删改查操作]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/79071599</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/79071599</guid><author>jeffhymm</author><pubDate>Wed, 16 Oct 2019 13:35:59 +0800</pubDate><description><![CDATA[1.导入依赖




&lt;properties&gt;
    &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt;
    &lt;spring.version&gt;3.1.1.RELEASE&lt;/spring.version&gt;
    &lt;hibernate.versi...]]></description><category></category></item><item><title><![CDATA[oracle相关学习笔记]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/102583810</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/102583810</guid><author>jeffhymm</author><pubDate>Wed, 16 Oct 2019 13:33:36 +0800</pubDate><description><![CDATA[sqlplus / nolog

conn / as sysdba

1. oracle:lsnrctl stop 停止监听

2. oracle: lsnrctl start 启动监听

3. oracle: lsnrctl status 查看监听服务

sqlplus / as sysdba ;

SQL&gt; shutdown immediate 停止数据库服务

SQL&gt...]]></description><category></category></item><item><title><![CDATA[SSH环境的搭建]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/79042466</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/79042466</guid><author>jeffhymm</author><pubDate>Wed, 16 Oct 2019 13:31:12 +0800</pubDate><description><![CDATA[零：

      以下以我自己的项目为例，

  一：

点击左侧的Spring
	Additional Libraries and Framework里面选择Spring,Web Application, Struts2, Application Server(选择tomcat就可以了),Hibernate；
	点击Next,输入项目名称；完成后等待IDEA下载依赖...]]></description><category></category></item><item><title><![CDATA[常用myslq命令]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/90484196</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/90484196</guid><author>jeffhymm</author><pubDate>Thu, 23 May 2019 17:15:35 +0800</pubDate><description><![CDATA[1.在root用户下操作

删库语句：DROP DATABASE IF EXISTS dev_teller9;

删除用户：DROP USER dev_teller9;

建库语句: CREATE DATABASE dev_teller9 DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
建立用户：create user 'dev_telle...]]></description><category></category></item><item><title><![CDATA[发送邮件（@163.com）]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/78901930</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/78901930</guid><author>jeffhymm</author><pubDate>Tue, 26 Dec 2017 14:29:02 +0800</pubDate><description><![CDATA[1.添加依赖，
      commons-email  等等 

@Test
    public void sendMail() throws EmailException, MalformedURLException, UnsupportedEncodingException {
        //可以添加发送响应的类
        HtmlEmail email = new]]></description><category></category></item><item><title><![CDATA[实践面试题总结]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/78767670</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/78767670</guid><author>jeffhymm</author><pubDate>Sun, 10 Dec 2017 21:59:27 +0800</pubDate><description><![CDATA[1.bootstrap特点
 跨浏览 响应布局 提供的全面的组件 内置jquery插件
支持html5 css3 支持less动态样式


2.==与equal()区别
 如果是比较基本类型，相当则为true,否则则为false;
 如果是引用类型，则比较的是栈内存中的地址,相等则为true，否则为false；
3.html中常见的标签，将两个d]]></description><category></category></item><item><title><![CDATA[mybatis学习笔记]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/78649644</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/78649644</guid><author>jeffhymm</author><pubDate>Mon, 27 Nov 2017 22:03:03 +0800</pubDate><description><![CDATA[### 在Maven的POM文件中的build节点下的plugins 节点中添加MyBatis-generater插件的依赖
```
 
        org.mybatis.generator
        mybatis-generator-maven-plugin
        1.3.5
        
            
                Ge]]></description><category></category></item><item><title><![CDATA[hibernate学习笔记]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/78639551</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/78639551</guid><author>jeffhymm</author><pubDate>Sun, 26 Nov 2017 22:55:22 +0800</pubDate><description><![CDATA[javaEE三层结构

    1.web层：    struts2框架
     2.service层:     spring框架
     3.dao层:     hibernate框架
           （1）对数据库进行crud操作
      mvc模式:
            model :模型
            view：视图
            c]]></description><category></category></item><item><title><![CDATA[oracle数据库的学习]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/78637029</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/78637029</guid><author>jeffhymm</author><pubDate>Sun, 26 Nov 2017 16:56:18 +0800</pubDate><description><![CDATA[1.权限管理
           ①  默认的三个用户
                 sys      默认密码 change_on_install   [as sysdba]
                 system     manager
                  scott         tiger
   ②  创建用户
            sqlpl]]></description><category></category></item><item><title><![CDATA[mybatis(1.环境的搭建)（2.部分优化）]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/78575378</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/78575378</guid><author>jeffhymm</author><pubDate>Sun, 19 Nov 2017 17:14:05 +0800</pubDate><description><![CDATA[1.引入mybatisjar包


            org.mybatis
            mybatis
            3.4.5


2. MyBatis官方网站
http://www.mybatis.org/mybatis-3/zh/index.html

概念：
MyBatis 是一款优秀的持久层框架，它支持定制化 SQL、存储过程以及高级]]></description><category></category></item><item><title><![CDATA[SpringMvc(一.环境搭建)（二.数据校验、）]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/78555995</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/78555995</guid><author>jeffhymm</author><pubDate>Sat, 18 Nov 2017 21:45:52 +0800</pubDate><description><![CDATA[1.log4j.properties文件的作用规范日志文件的格式]]></description><category></category></item><item><title><![CDATA[String、StringBuilder、StringBuffer三者的区别和联系]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/76471883</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/76471883</guid><author>jeffhymm</author><pubDate>Sat, 18 Nov 2017 21:21:50 +0800</pubDate><description><![CDATA[一.String 是除8种基本类型外的一种非常重要而又常见的引用数据类型，先来聊下String的常见方法,
  1.equals（str）-->boolean ，其参数串型,返回值类型为boolean,用来判定两个字符串的值是否相等；
2.equalsIgnoreCase(str)-->boolean,与equals方法基本相似，是不区分大小写的判定两个字符串是否相等；
3.length()]]></description><category></category></item><item><title><![CDATA[关于java中反射机制的自我理解]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/78387851</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/78387851</guid><author>jeffhymm</author><pubDate>Sun, 29 Oct 2017 20:54:02 +0800</pubDate><description><![CDATA[1.java中的反射机制就是将磁盘上的任何类加载到内存中
        有三种方法
        （一） 类名.class  
        （二）new 类名.getClass();
        （三） Class.forName("类的完整路径");
         返回值类型都是Class
2.创建类对象。
      （一）通过无参的构造方法]]></description><category></category></item><item><title><![CDATA[谷歌验证码的使用]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/78385889</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/78385889</guid><author>jeffhymm</author><pubDate>Sun, 29 Oct 2017 15:52:23 +0800</pubDate><description><![CDATA[1.导入jar包分别是
kaptcha-2.3.2,jar
kaptcha-2.3.2-jdk14.jar
2.在项目web.xml
        中配置 
  
    kaptcha
    
  		com.google.code.kaptcha.servlet.KaptchaServlet
  	
  	
    
    
      kaptcha.border
      ]]></description><category></category></item><item><title><![CDATA[下拉列表左右选择(js代码)]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/78359382</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/78359382</guid><author>jeffhymm</author><pubDate>Thu, 26 Oct 2017 22:13:21 +0800</pubDate><description><![CDATA[html>
html lang="en">
head>
    meta charset="UTF-8">
    title>title>
script type="text/javascript">
    function allToRight(){
         //得到左边的select 对象
        var selectLeft=document.getElementByI]]></description><category></category></item><item><title><![CDATA[纯js代码的计时器]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/78312103</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/78312103</guid><author>jeffhymm</author><pubDate>Sun, 22 Oct 2017 19:03:12 +0800</pubDate><description><![CDATA[html>
html lang="en">
head>
    meta charset="UTF-8">
    title>title>
    script type="text/javascript">
        //全局变量 前面的类型可以省略
        var t=0;
        var end;
        function start(){
         ]]></description><category></category></item><item><title><![CDATA[mysql中JDBC相关知识]]></title><link>https://blog.youkuaiyun.com/jeffhymm/article/details/77511658</link><guid>https://blog.youkuaiyun.com/jeffhymm/article/details/77511658</guid><author>jeffhymm</author><pubDate>Wed, 23 Aug 2017 20:47:21 +0800</pubDate><description><![CDATA[1.JDBC的简介
JDBC（Java Data Base Connectivity ,java 数据库连接）是一种用于执行SQL语句的Java API，可以为多种数据库库提供统一访问,它由一组用JAVA语言编写的类和接口组成，JDBC提供了一组]]></description><category></category></item></channel></rss>