<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[a1055679698的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/a1055679698</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; a1055679698]]></copyright><item><title><![CDATA[Python日记7--字典]]></title><link>https://blog.youkuaiyun.com/a1055679698/article/details/79407607</link><guid>https://blog.youkuaiyun.com/a1055679698/article/details/79407607</guid><author>a1055679698</author><pubDate>Thu, 01 Mar 2018 08:21:42 +0800</pubDate><description><![CDATA[11111]]></description><category></category></item><item><title><![CDATA[关于Tomcat服务器中使用jsp找不到图片存放路径的问题]]></title><link>https://blog.youkuaiyun.com/a1055679698/article/details/79215315</link><guid>https://blog.youkuaiyun.com/a1055679698/article/details/79215315</guid><author>a1055679698</author><pubDate>Wed, 31 Jan 2018 11:44:41 +0800</pubDate><description><![CDATA[1.JSP中输入路径   则默认查找到的是D:\Java\Tomcat\apache-tomcat-8.0.27\webapps下的/picture/p2.png 而不是 wtpwebapps！！！

因为在D:\Java\Tomcat\apache-tomcat-8.0.27\conf\server.xml 中默认设置有







2.使用 返回的是当前项目的相对路径 /]]></description><category></category></item><item><title><![CDATA[Python日记6--元组]]></title><link>https://blog.youkuaiyun.com/a1055679698/article/details/79201521</link><guid>https://blog.youkuaiyun.com/a1055679698/article/details/79201521</guid><author>a1055679698</author><pubDate>Tue, 30 Jan 2018 08:27:53 +0800</pubDate><description><![CDATA[1,元组概述 元组是一种特殊的列表,一旦创建,将不可改变.也叫只读列表        格式：元组名=（元素1，元素2，元素3...） PS:长度不可改变;元组元素不可改变2,元组方法 元组只提供了两个方法,A.index()用于查找元素 B.count()用于统计元组元素个数,或指定元素的个数与列表的count()方法一致....]]></description><category></category></item><item><title><![CDATA[JDBC:@text报错\preparedstatment索引超出范围]]></title><link>https://blog.youkuaiyun.com/a1055679698/article/details/79192314</link><guid>https://blog.youkuaiyun.com/a1055679698/article/details/79192314</guid><author>a1055679698</author><pubDate>Mon, 29 Jan 2018 10:29:48 +0800</pubDate><description><![CDATA[问题1: java.lang.Exception:No tests found matching
构造方法私有的情况下,JUnit无法使用反射加载类.
问题2:
代码如下package utils;


import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStateme]]></description><category></category></item><item><title><![CDATA[Python日记5--列表]]></title><link>https://blog.youkuaiyun.com/a1055679698/article/details/79184675</link><guid>https://blog.youkuaiyun.com/a1055679698/article/details/79184675</guid><author>a1055679698</author><pubDate>Sun, 28 Jan 2018 09:22:54 +0800</pubDate><description><![CDATA[1.列表

 与Java中的*集合*性质相同,用于储存一组数据.

格式: 列表名=[元素1,元素2,元素3,元素4,...];

A:列表元素获取
 方式一: 列表名[索引]
  
 方式二(切片):列表名[索引1:索引2] PS:此方式包左不包右,用冒号分开
  方式二举例:name=["Harry","Smith","Lily","OnionKnight"]

   ]]></description><category></category></item><item><title><![CDATA[Python日记4--数据类型,int与bytes]]></title><link>https://blog.youkuaiyun.com/a1055679698/article/details/79178161</link><guid>https://blog.youkuaiyun.com/a1055679698/article/details/79178161</guid><author>a1055679698</author><pubDate>Sun, 28 Jan 2018 08:37:51 +0800</pubDate><description><![CDATA[1.int类型
 32位系统上的长度,为2的31次幂减一(正负),而64位系统长度为2的63次幂减一(正负);

2.long类型
 Python2中,当数据长度超出int的范围时,变量类型将自动升为long类型

而Python3中,int的长度不在有限制,因此也不存在类型隐世转换
3.bytes类型
 java中不存在

二进制数据类型,用于视频音频等媒体文件的储存
在P]]></description><category></category></item><item><title><![CDATA[Python日记3--运算符]]></title><link>https://blog.youkuaiyun.com/a1055679698/article/details/79171353</link><guid>https://blog.youkuaiyun.com/a1055679698/article/details/79171353</guid><author>a1055679698</author><pubDate>Sat, 27 Jan 2018 08:37:49 +0800</pubDate><description><![CDATA[1.基本运算符
 +(加),-(减),*(乘),/(除),%(取余)与java一样,因为Python一个变量的数据类型,不固定,
因此当用/(除已)运算时,当参与运算的数据有浮点数时,结果会是浮点数.
因此,需要用取整时,用//(相除取整运算).
 Python还包含其他的基本运算符:**(幂运算符),ex:a**b==a的b次幂
2.赋值运算符
 =,+=,-=,/=,%=与java]]></description><category></category></item><item><title><![CDATA[Python日记2-pyc文件概述]]></title><link>https://blog.youkuaiyun.com/a1055679698/article/details/79157402</link><guid>https://blog.youkuaiyun.com/a1055679698/article/details/79157402</guid><author>a1055679698</author><pubDate>Fri, 26 Jan 2018 08:55:11 +0800</pubDate><description><![CDATA[1.sys模块
 当前平台的模块,sys.path方法,可以打印当前系统与Python相关的环境变量.
2.os模块
 与当前系统的交互模块,os.system方法,可以直接直行DOS命令.但结果无法保存,只能直接输出.
3.pyc文件
 C:\Program Files\Anaconda3\Lib\site-packages路径下的_pycache__目录内,有大量的pyc文件,
这]]></description><category></category></item><item><title><![CDATA[Python日记1--打印方法,循环语句,条件语句,字符串拼接]]></title><link>https://blog.youkuaiyun.com/a1055679698/article/details/79133506</link><guid>https://blog.youkuaiyun.com/a1055679698/article/details/79133506</guid><author>a1055679698</author><pubDate>Mon, 22 Jan 2018 21:14:10 +0800</pubDate><description><![CDATA[1,python是一门区分大小写的语言
 2,变量无需声明数据类型
 3,Python3,的键盘录入方法为input();
 4,字符串转成int类型方法:int();
 5,转成字符串的方法:str();
 6,字符串的拼接
   name="Onion_Knight";

   job="IT";
    方法一:
 info = ''' My name is'''+nam]]></description><category></category></item></channel></rss>