jdbc 1.1 what is jdbc,JDBC tutorial, use jdbc to connect to the database for addition, deletion, modification and query. PreparedStatement solves sql injection.

1. Specific contents 1.1 concept JDBC (Java DataBase Connectivity) is a java database connection. In other words, it uses the Java language to operate the database. It turns out that we operate the database by using SQL statements on the console, and JDBC sends SQL statements to the database in Java language. JDBC (Java Data Base Connecti ...

Posted on Sun, 05 Dec 2021 00:40:10 -0500 by empnorton

JDBC addition, deletion, query and modification of Java

preface JDBC is not only the specification of Java operating database, but also the core foundation. The principle of the future framework also encapsulates JDBC and uses reflection, annotation and design patterns to complete simplification. 1, JDBC architecture JDBC interface (API) includes two levels:Application oriented API: Java ...

Posted on Sun, 28 Nov 2021 02:37:32 -0500 by fukas

JDBC usage details

introduction JDBC (Java DataBase Connectivity) is a method for Java to connect to a database; In fact, the essence is a set of interfaces customized by SUN company, which can realize the connection between Java and various databases, as shown in the following figure: Note: This paper uses IDEA demonstration, and the database uses MySQL datab ...

Posted on Sat, 27 Nov 2021 18:07:09 -0500 by heyjohnlim

Alibaba Druid database connection pool take-off directly

1. What is a database connection pool Why use connection pooling: When we develop in Java, we need to access the database, but Java can't access the database directly. We have to establish a connection between the program and the database through JDBC. Performing a transaction requires creating a connection. The process of establishing a co ...

Posted on Thu, 25 Nov 2021 12:07:34 -0500 by PastorHank

Analyze the working principle of MyBatis from the perspective of source code

1, MyBatis complete example Here, I'll use an entry-level example to demonstrate how MyBatis works. Note: the principles and source code in the later chapters of this article will also be explained based on this example. Full sample source address 1.1. Database preparation In this example, CRUD operation is required for a user table. The da ...

Posted on Wed, 24 Nov 2021 11:12:47 -0500 by jinwu

JDBC -- accessing database: using PreparedStatement to implement CRUD operation

Access database Database connection is used to send commands and SQL statements to the database server. After the connection is established, you need to access the database and execute SQL statements. In the java.sql package, there are three interfaces that define different ways to call the database: Statement —|PreparedStatement —| Calla ...

Posted on Mon, 22 Nov 2021 13:03:59 -0500 by jakeruston

Persistence layer learning notes

1,JDBC 1-1 introduction    it is a tool for java programs to connect and access databases. It is also a manual, which specifies a unified format,    the real addition, deletion, modification and query operation needs to be implemented by the database driver package (jar package) (jar package is provided by different ...

Posted on Sat, 20 Nov 2021 06:13:31 -0500 by jamieh

JDBC general operations

The main contents of this section are as follows: 1, Reflection writing universal insert   when using reflection to complete common database operations, we generally need to formulate some conventions. It is assumed that our database meets the following conventions during design and development: 1. The database table name and entit ...

Posted on Wed, 10 Nov 2021 20:19:17 -0500 by adeelzia

JDBC (database connection pool, Druid connection technology)

catalogue VIII. Database connection pool 8.1 necessity of JDBC database connection pool 8.2 database connection pool technology 8.3 multiple open source database connection pools 8.3.1 C3P0 database connection pool 8.3.2 DBCP database connection pool 8.3.3 Druid database connection pool VIII. Database connection pool 8.1 necessity of ...

Posted on Thu, 04 Nov 2021 05:20:44 -0400 by InfinityRogue

Common configuration files in mybatis

Configuration files in mybatis 1. Global profile 1.1 properties: read external resources properties file, read in the form of key value, with = For example: Create the db.properties file under resources:   Load in global configuration file:    <properties  resource="db.properties">        <property name="userName" val ...

Posted on Thu, 21 Oct 2021 19:41:56 -0400 by Gighalen