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Recently, major vulnerabilities have been revealed in log4j2. The company also urgently requires all projects to check themselves and upgrade the version of log4j to a safe version At present, we are using springboot version 1.5.9, and the built-in log4j2 is version 2.7. Although mybatis is integrated, the built-in version of log4i is still b ...

Random grid search RandomSearchCV learning notes, including: Basic principle of random grid searchskelarn application of random grid search (case: house price dataset _python)Application of continuous distribution in random grid search (case: house price data set _python) Indexes 🔣 Functions and parameters 🔑 formula 🗣 case 📌 Noun i ...

subject Enter a string of numbers and give you M inquiries. Each inquiry will give you two numbers x and Y, asking you to say the maximum number in the range from X to Y. Input format In the first line, there are two integers n, and M represents the number of numbers and the number of times to ask; The number of next row N; Next M lines, ea ...

Detailed explanation of multithreading summary Core concept Threads are independent execution pathsWhen the program is running, there will be multiple threads in the background, such as main thread and gc thread, even if there is no thread created by itselfmain() is called the main thread, which is the entry of the system and is used to exec ...

The previous article mentioned that the cache will be used when querying. Its built-in two-level cache is as follows:// The L1 cache is bound to sqlsession in the executor // org.apache.ibatis.executor.BaseExecutor#localCache // Point to org apache. ibatis. cache. impl. PerpetualCache#cache private Map<Object, Object> cache = new HashMap& ...

generic paradigm A generic type is actually a type parameter used to specify a type. In order to count students' scores, it is required to design a Score object, including course name, course number and course Score. However, there are two kinds of scores: one is to take excellent, good and qualified as the result, and the other is to use dig ...

The customer in this case is from a provincial telecom. A large number of ORA-00600[4187] errors in alert logs have affected the normal operation of the business.Fri Nov 19 16:07:09 2021Errors in file /u01/oracle/app/oracle/diag/rdbms/lcfa/LCFA1/trace/LCFA1_smon_5811.trc (incident=184182): ORA-00600: internal error code, arguments: &#91;41 ...

Library management system is a common small project in learning programming. After learning classes and objects, encapsulation, inheritance, polymorphism and interfaces, we can use these ideas to realize our library management system. Here I will use two blogs to explain the specific implementation methods. According to the first two blogs, we ...

#include<stdio.h> #include<string.h> #include<algorithm> int e[110][110],culture[110][110],country[110],visit[110];//Adjacency matrix of countries and cultures int N,K,M,S,T,learn[110],ans; int judge(int x,int y)//Judge whether there is any conflict between the learned culture and x countries { if(culture[ country[y] ...

Family, every other day with new knowledge to meet you! Today we are learning how to get and control HTML elements in our JS. If you want to learn JavaScript well, you should persevere in learning it. If you don't understand anything, you can confide in me or comment below and you will reply when you see it. I How to get HTML elements in JS ...