浅谈4种类型的JDBC驱动程序 _MySQL
JDBC
在网上下载JDBC驱动程序，常看见Type4字样，开始以为是厂商自己的标准，近来翻看资料，原来是SUN定义的JDBC标准。
Type1 JDBC-ODBC桥
作为JDK1.1后的一部分，是sun.jdbc.odbc包的一部分
Application--->JDBC-ODBC Bridge(Type1 jdbc driver)---->JDBC-ODBC Library--->ODBC Driver-->Database
适用于快速的原型系统，没有提供JDBC驱动的数据库如Access
Type2 JAVA to Native API
利用开发商提供的本地库来直接与数据库通信。
Application--->JDBC Driver(Type2 jdbc driver)---->Native Database library---->Database
比Type1性能略好。
Type3 Java to net
Application--->Jdbc Driver(Type3 jdbc driver)----->java middleware--->JDBC Driver---->Database
具有最大的灵活性，通常由那些非数据库厂商提供，是四种类型中最小的。
Type4 JAVA to native dababase
Application--->Jdbc driver(type4 jdbc driver)----->database engine--->database
最高的性能，通过自己的本地协议直接与数据库引擎通信，具备在Internet装配的能力。
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1392
52
iOS 18 adds a new 'Recovered' album function to retrieve lost or damaged photos
Jul 18, 2024 am 05:48 AM
Apple's latest releases of iOS18, iPadOS18 and macOS Sequoia systems have added an important feature to the Photos application, designed to help users easily recover photos and videos lost or damaged due to various reasons. The new feature introduces an album called "Recovered" in the Tools section of the Photos app that will automatically appear when a user has pictures or videos on their device that are not part of their photo library. The emergence of the "Recovered" album provides a solution for photos and videos lost due to database corruption, the camera application not saving to the photo library correctly, or a third-party application managing the photo library. Users only need a few simple steps
How does Hibernate implement polymorphic mapping?
Apr 17, 2024 pm 12:09 PM
Hibernate polymorphic mapping can map inherited classes to the database and provides the following mapping types: joined-subclass: Create a separate table for the subclass, including all columns of the parent class. table-per-class: Create a separate table for subclasses, containing only subclass-specific columns. union-subclass: similar to joined-subclass, but the parent class table unions all subclass columns.
Detailed tutorial on establishing a database connection using MySQLi in PHP
Jun 04, 2024 pm 01:42 PM
How to use MySQLi to establish a database connection in PHP: Include MySQLi extension (require_once) Create connection function (functionconnect_to_db) Call connection function ($conn=connect_to_db()) Execute query ($result=$conn->query()) Close connection ( $conn->close())
How to handle database connection errors in PHP
Jun 05, 2024 pm 02:16 PM
To handle database connection errors in PHP, you can use the following steps: Use mysqli_connect_errno() to obtain the error code. Use mysqli_connect_error() to get the error message. By capturing and logging these error messages, database connection issues can be easily identified and resolved, ensuring the smooth running of your application.
What is the type of return value of Golang function?
Apr 13, 2024 pm 05:42 PM
Go functions can return multiple values of different types. The return value type is specified in the function signature and returned through the return statement. For example, a function can return an integer and a string: funcgetDetails()(int,string). In practice, a function that calculates the area of a circle can return the area and an optional error: funccircleArea(radiusfloat64)(float64,error). Note: If the function signature does not specify a type, a null value is returned; it is recommended to use a return statement with an explicit type declaration to improve readability.
How to use database callback functions in Golang?
Jun 03, 2024 pm 02:20 PM
Using the database callback function in Golang can achieve: executing custom code after the specified database operation is completed. Add custom behavior through separate functions without writing additional code. Callback functions are available for insert, update, delete, and query operations. You must use the sql.Exec, sql.QueryRow, or sql.Query function to use the callback function.
How to connect to remote database using Golang?
Jun 01, 2024 pm 08:31 PM
Through the Go standard library database/sql package, you can connect to remote databases such as MySQL, PostgreSQL or SQLite: create a connection string containing database connection information. Use the sql.Open() function to open a database connection. Perform database operations such as SQL queries and insert operations. Use defer to close the database connection to release resources.
How to handle database connections and operations using C++?
Jun 01, 2024 pm 07:24 PM
Use the DataAccessObjects (DAO) library in C++ to connect and operate the database, including establishing database connections, executing SQL queries, inserting new records and updating existing records. The specific steps are: 1. Include necessary library statements; 2. Open the database file; 3. Create a Recordset object to execute SQL queries or manipulate data; 4. Traverse the results or update records according to specific needs.
