Programmer Group

Basic introduction Bridge mode is a structural design mode. Put the implementation and abstraction in two different class levels, so that the two levels can be changed independently. Based on the minimum design principle of class, different classes are given different responsibilities through encapsulation, aggregation, inheritance and other b ...

1, MySQL database 1. Create database CREATE DATABASE jdbc CHARACTER SET 'utf8'; 2. build tables CREATE TABLE user ( id int(10) NOT NULL AUTO_INCREMENT, userName varchar(20) NOT NULL, PRIMARY KEY (id) ); 3. Add data 2, Connect MySQL database through JDBC 1.JDBC URL 2.Statement boolean execute(String SQL): if the ResultSet object can be ...

Original link: http://www.yiidian.com/dbutils/dbutils-beanlisthandler.html org.apache.commons.dbutils.BeanListHandler is the implementation of the ResultSetHandler interface, and is responsible for converting all records at the ResultSet result level to the List collection of JavaBean s. This class is thread safe. 1 syntax for beanlisthandler L ...

Hive can only be installed on one node 1. Upload tar package 2. Decompression tar -zxvf hive-1.2.1.tar.gz -C /apps/ 3. Install mysql database (switch to root user) (there are no limitations on where to install, only nodes that can connect to the hadoop cluster) 4. Configure hive (a) Configure the HIVE_HOME environment variable vi conf/hive-e ...

Spring transactions rely on AOP. The transaction execution process is to add AOP facet logic when the business method is executing. It is intercepted by the TransactionInterceptor class. We use this as the entry point to analyze the whole process. 1, TransactionInterceptor public Object invoke(MethodInvocation invocation) throws Throwable { ...

In the previous section, we talked about the configuration and management of services in CAS. We have some knowledge about adding services in CAS to the registry. If you are not familiar with this, you can review it CAS Single Sign-on (5) - Service Configuration and Management. Today, we continue with articles that we haven't covered before on ...

JDBC for transaction management There are four characteristics of a transaction:Atomicity: refers to that the operations contained in a transaction are regarded as a logical unitConsistency: the database is in a consistent state before and after the startIsolation: multiple transactions modified to the database are isolated from each otherThe i ...

In the previous section, we used a variety of authentication methods of CAS to complete the login authentication in a variety of ways, that is, we mainly used a variety of authentication schemes encapsulated by CAS for us, which can basically meet our multiple needs of authentication. If you still don't know a lot about the multiple authenticat ...

1. Parameter configuration mode of set [List,Set,Map] and configuration file [] applicationContext.xml <!--Set and configuration parameter injection mode --> <bean id="example" class="cn.goktech.entity.Example"> <property name="interest"> <list> <valu ...

Article directory 1. Declarative transaction control based on XML 1.1 environment construction 1.2 transaction control configuration steps 2. Declarative transaction control based on annotation 3. Support for purely annotated transactions This paper uses the demo of account transfer to demonstr ...