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New Statement Handler Analysis of Configuration SimpleExecutor's doUpdate method has been analyzed above: 1 public int doUpdate(MappedStatement ms, Object parameter) throws SQLException { 2 Statement stmt = null; 3 try { 4 Configuration configuration = ms.getConfiguration(); 5 StatementHandler handler = configuration.n ...

PreparedStatement is a sub-interface of Statement, and its name shows that it is a "ready" Statement, so it represents a pre-compiled SQL statement; the object to obtain it can be obtained by the preparedStatement (String sql) method in Connection, where the parameters are SQL statements with placeholders, so it is in it. Some setXxx( ...

I. Introduction: 1.JDBC (Java Database Connectivity) is a general SQL database access and operation independent of a specific database management system. * Common interfaces (a set of API s) * A standard java class library for accessing database is defined. Using this class library, database resources can be accessed conveniently in a stand ...

In practical projects, it is often necessary to connect multiple databases, and different business needs often need to access different databases in the implementation process. jdbc.properties configuration file, configuring multiple dataSource s ##########################MySQL##################################### hibernate.dialect=org.hiberna ...

I. Isolation Level of Transactions Multiple transactions run simultaneously in the database. When they access the same data in the database, if the isolation mechanism is not adopted, some concurrency problems will occur. There are several concurrency problems in the database. (1) Reading "dirty" data refers to the fact that trans ...

background Recently, due to job adjustments, we have been dealing with databases, which has increased many opportunities for close contact with JDBC. In fact, we are using Mybatis.Knowing it, knowing it, is what our engineers and children's shoes should pursue, to help you better understand this technology, and to be more comfortable when facin ...

PinPoint installation deployment and the pit I encountered PinPoint collector deploys, configures Tomcat and Dubbo services PinPoint Use Tutorial Some pits PinPoint trampled on HBase and PrinPoint are deployed on different servers PinPoint implements mail alert After installing pinpoint, click the settings button in the upper right corne ...

There is a requirement in the recent project that about 150W data should be imported into the mysql database. There are six tables in total. The tables with the most data have about 100W data. Because it's a one-time import and isn't used often, it's planned to write a small program that uses native JDBC, jar packages, and runs on the server. ...

Debug Entry Find the XmlConfigBuilder Test in the mybatis source code and run shouldSuccessfully Load XMLConfigFile () in debug mode. Initialization First, create the XMLConfigBuilder object, in the construction method: Reading files through InputStream to generate Document objects for XML, the operations related to XML are beyond the sc ...

1. When using Hibernate as an orm application, myeclipse is recommended as a development tool.2. Import the corresponding Hibernate jar package into the Lib directory under the Webroot file (webroot - > WEB-INF - > lib) Notes on jar imports in Hibernate development:(1) Provide a Hibernate jar package download link here, address http://pan ...