Database connection pool and com.mysql.jdbc.exceptions.jdbc4.Communications Exception exception

The abnormal information is as follows: com.ibatis.common.jdbc.exception.NestedSQLException: --- The error occurred in mit/datamodel/ibatis/person.xml. --- The error occurred while executing query. --- Check the select * from person where pID = ?. --- Check the SQL Statement (preparation failed). --- Cause: com.mysql.jdbc.exception ...

Posted on Sat, 22 Dec 2018 11:06:06 -0800 by daanoz

[Drools rule engine] Drools 6.5.0 + eclipse 4.6.2 + Jdk1.7 + Tomcat 1.7 environment deployment

Preface A Demo runs very hard and the environment is not clear. It always encounters problems of one kind or another, such as the following: 1. value '1.8' is not a valid language level error 2. Unsupported major.minor version 51.0 Therefore, this article begins by explaining environmental dependence: Drools 6.5.0 http://www.drools.o ...

Posted on Fri, 21 Dec 2018 06:12:05 -0800 by joeywoodbury

centos 6.8 Install LNMP Environment (linux+nginx+mysql+php)

Nginx characteristicsNginx has the advantages of stable performance, rich functions, simple operation and maintenance, fast processing of static files and little system resource consumption.1. Compared with Apache, Nginx serves as a Web server: it uses fewer resources, supports more concurrent connections and is more efficient.2. As a load bala ...

Posted on Thu, 20 Dec 2018 22:03:06 -0800 by russian_god

[Web Form of asp.net] Write database operation class--abstract factory

Understanding Abstract factories In ADO.NET, the operation steps of SqlServer, Mysql and so on are similar, but the difference is: SqlServer uses SqlConnection, SqlCommand, SqlData Adapter for its operation. MySql uses MySql Connection, MySqlCommand, MySqlDataAdapter, and these connection classes of operation classes ...

Posted on Thu, 20 Dec 2018 17:12:05 -0800 by j05hr

mysql-5.7.23-winx64.zip version of MySQL Installation-Free Configuration Tutorial under windows

mysql-5.7.23-winx64.zip version of MySQL Installation-Free Configuration Tutorial under windows Step 1: Download MySQL Step 2: Unzip the zip package to the directory you need to install Part 3: Configuration files Step 4: Initialize the database Step 5: Register widows Services Step 6: Start MySQL57 Service Method 1: Find M ...

Posted on Thu, 20 Dec 2018 09:09:05 -0800 by TheHyipSite

RPM Installation and Uninstallation of MySQL-5.6.27-1.linux*.x86_64.rpm* (reprinted from the "Youyou-My Heart" blog)

1. Installation preparation 1.1 Check to see if there is a MySql library that comes with it, if it is uninstalled first [root@hadoop02 ~]# rpm -qa | grep mysql mysql-libs-5.1.71-1.el6.x86_64 [root@hadoop02 ~]# rpm -e --nodeps mysql-libs-5.1.71-1.el6.x86_64 [root@hadoop02 ~]# rpm -qa | grep mysql [roo ...

Posted on Thu, 20 Dec 2018 06:51:05 -0800 by hellonoko

Python 3 environment building (uWSGI+django+nginx+python+MySQL)

1. Systematic environment, necessary knowledge #cat /etc/redhat-release CentOS Linux release 7.5.1804 (Core) #uname -r 3.10.0-862.3.2.el7.x86_64 Temporarily close the protective wall and close selinux: #systemctl stop firewalld.service #setenforce 0 #getenforce Permissive Prepare knowledge: django: an open source web frame ...

Posted on Thu, 20 Dec 2018 06:36:05 -0800 by numoon56

Docker Deployment WordPress LNMP(Nginx PHP MySQL) Environment Practice

Docker implements encapsulation of software into a complete file system based on LXC. It can run all the code, running environment, system tools and system libraries required in the docker container. Because docker uses a host-independent file system, it can ensure that the software still runs in different host environments. Doker shares an op ...

Posted on Wed, 19 Dec 2018 19:33:05 -0800 by spramod

MySQL Learning Notes (4): Notes for LAST_INSERT_ID() in MySQL

On LAST_INSERT_ID() LAST_INSERT_ID() is a function in MySQL that automatically returns the value from the first table set by the AUTO_INCREMENT column in the last INSERT or UPDATE query. Matters needing attention The Connection object used for query and insertion must be the same, otherwise the return value is unpredictable. ...

Posted on Wed, 19 Dec 2018 03:15:04 -0800 by dmort

The problem of Publishing Web service interface on myeclipse spring+mybatis+axis2 and the way of personal implementation

Premise: Suddenly one day this month, there was a project docking that needed to use the interface published by axis2, which made it difficult for me. After all, I didn't even know how to publish the web service interface before. Later, the first interface, sayHi(), was released from Hello World; until then, it was smooth, but when it was integ ...

Posted on Tue, 18 Dec 2018 18:21:04 -0800 by winsonlee