Programmer Group

Syllabus 1. jsp form data change 2. Difference between form method get and post; 3. Character encoding Course notes 1, jsp form data change //First, query the database through id and display it in the form <% String id = request.getParameter("id"); String name =""; Class.forName("com.mysql.jdbc.Driver"); ...

JDBC concepts and quick start cases 1. Concept of JDBC: Operate database by Java code (add, delete, modify, check) 2. Quick start procedure: A.Import jar package B.Registration driven Class.forName("com.mysql.jdbc.Driver"); C.Acquisition drive String url = "jdbc:mysql://127.0.0.1:3306 / EE "; / / EE is the name ...

Business scenario: In the actual project development, sometimes the data will be stored in multiple databases, that is, there are different data sources. So in the SSM framework, how to configure multiple databases? Get ready: Two Oracle data sources DataSource1:172.83.242.145:1521/orcl user name: zsyw · Jr password: ...

Learning content Use of JDBC Development steps 1. Select database: load database driver; 2. Connect to the database 3. Create database query 4. Get query results 5. Get query results Complete JDBC operation code package com.dodoke.jdbc; import java.sql.Connection; import java.sql.DriverManager; import java.sql.Prepared ...

Catalog 1. What is coupling and decoupling? 2. jdbc program decoupling 3. Program coupling of traditional dao, service, controller 4. Use factory mode to decouple 5. Improvement of factory mode 6. Conclusion @ 1. What is coupling and decoupling? Since it is program decoupling ...

Guice, an open-source dependency injection Library of Google, compares with Spring IoC Smaller and faster. Guice is widely used in elastic search. This paper briefly introduces the basic concept and usage of Guice. Learning objectives   Overview: understand what Guice is and what characteristics it has; Quick start: learn Guice through example ...

rely on <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-logging</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <d ...

Quartz has different memory and database modes In memory mode, task information is saved in memory, and it will be lost during shutdown. It needs to be re executed manually. In database mode, task information is saved in database, and the focus is to support cluster RAMJobStore in memory mode and database mode JobStoreTX, RAMJobStore is suita ...

Recently, a problem was found when using mybatis generator to generate the entity classes corresponding to Oracle database. It is hereby recorded. Because the project uses swagger2, we want to generate the corresponding @ ApiMode and @ ApiModelProperty annotations through table annotations and field annotations when generating entity classes. H ...

Preface Apache Commons dbutils version 1.7 shows the calls that support stored procedures. Please pay attention to the version issue when using this code. 1.7 version update method int execute(String sql, Object… params) executes SQL statements, including stored procedure calls, which do not return any result sets. ...