qq_44892103的博客

package com.gzlp.core.util; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.*; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * @author:Neptune * @Description:DateUtil 提供一些常用的时间想法的方法 */ public

1.安装C语言环境 yum install gcc-c++ 2.下载redis 2.1解压 tar zxvf redis-3.0.0.tar.gz 3.移动redis mv 文件 路径（usr）如：mv redis-4.0.11 usr 4.查看目录 ll 5.进入目录 cd usr 6.安装redis make install PREFIX=安装路径 如：make install P...

https://blog.youkuaiyun.com/xufei512/article/details/53321980

package com.zyq.pojo; import java.util.HashMap; import java.util.Map; /** * * 状态信息返回类 * * * */ public class Mag { private int code; private String msg; private Map<String...

冒泡排序 两个相邻的元素进行比较，一共有两个循环，外面的循环比较的次数是数组长度-1，里面的是长度-1-外面的变量。两个循环都是从0开始遍历 public class hello { public static void main(String[] args) { int[] a=new int[]{5,4,2,3,9,8};//创建数组，需要new 存放在堆内存中 for(int...

$.each(json,function(index,item) 里面的index代表当前循环到第几个索引， item表示遍历后的当前对象， 比如json数据为： [{“name”:“a”},{“name”:“b”},{“name”:“c”}] 使用foreach遍历后， index,item 依次为， 0，{“name”:“a”} 1，{“name”:“b”} 2，{“name”:“c”} ...

NoSuchMethodException: com.zyq.pojo.User.()## 标题 实体类没有空的构造方法

he method’s class, org.apache.ibatis.builder.xml.XMLConfigBuilder, is available from the following locations:* 把依赖 <!--<dependency> <groupId>org.apache.ibatis</groupI...

This application has no explicit mapping for /error, so you are seeing this as a fallback. Sun Sep 08 14:30:22 CST 2019 There was an unexpected error (type=Internal Server Error, status=500). Error re...

Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured. Reason: Failed to determine a suitable driver class Action: Consider the following: I...

*************************** APPLICATION FAILED TO START *************************** Description: Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be ...

**@TOCException in thread “main” java.lang.NullPointerException at com.zyq.print.Print.prints(Print.java:26) at com.zyq.test.Test.main(Test.java:23) 出现这样的情况，是因为在applicationContext.xml文件中没有配置扫描注解，此时需要 ...