关于MySql链接url参数的设置_MySQL
bitsCN.com
最近整理了一下网上关于MySql 链接url 参数的设置,有不正确的地方希望大家多多指教:
mysql JDBC URL格式如下:
jdbc:mysql://[host:port],[host:port].../[database][?参数名1][=参数值1][&参数名2][=参数值2]...
常用的几个较为重要的参数:
参数名称 参数说明 缺省值 最低版本要求
user 数据库用户名(用于连接数据库) 所有版本
passWord 用户密码(用于连接数据库) 所有版本
useUnicode 是否使用Unicode字符集,如果参数characterEncoding设置为gb2312或gbk,本参数值必须设置为true false 1.1g
characterEncoding 当useUnicode设置为true时,指定字符编码。比如可设置为gb2312或gbk false 1.1g
autoReconnect 当数据库连接异常中断时,是否自动重新连接? false 1.1
autoReconnectForPools 是否使用针对数据库连接池的重连策略 false 3.1.3
failOverReadOnly 自动重连成功后,连接是否设置为只读? true 3.0.12
maxReconnects autoReconnect设置为true时,重试连接的次数 3 1.1
initialTimeout autoReconnect设置为true时,两次重连之间的时间间隔,单位:秒 2 1.1
connectTimeout 和数据库服务器建立socket连接时的超时,单位:毫秒。 0表示永不超时,适用于JDK 1.4及更高版本 0 3.0.1
socketTimeout socket操作(读写)超时,单位:毫秒。 0表示永不超时 0 3.0.1
对应中文环境,通常mysql连接URL可以设置为:
jdbc:mysql://localhost:3306/test?user=root&password=&useUnicode=true&characterEncoding=utf8&autoReconnect=true&failOverReadOnly=false
在使用数据库连接池的情况下,最好设置如下两个参数:
autoReconnect=true&failOverReadOnly=false
需要注意的是,在xml配置文件中,url中的&符号需要转义成&。比如在tomcat的server.xml中配置数据库连接池时,mysql jdbc url样例如下:
jdbc:mysql://localhost:3306/test?user=root&password=&useUnicode=true&characterEncoding=utf8&autoReconnect=true&failOverReadOnly
bitsCN.com

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

MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

MySQL's position in databases and programming is very important. It is an open source relational database management system that is widely used in various application scenarios. 1) MySQL provides efficient data storage, organization and retrieval functions, supporting Web, mobile and enterprise-level systems. 2) It uses a client-server architecture, supports multiple storage engines and index optimization. 3) Basic usages include creating tables and inserting data, and advanced usages involve multi-table JOINs and complex queries. 4) Frequently asked questions such as SQL syntax errors and performance issues can be debugged through the EXPLAIN command and slow query log. 5) Performance optimization methods include rational use of indexes, optimized query and use of caches. Best practices include using transactions and PreparedStatemen

Apache connects to a database requires the following steps: Install the database driver. Configure the web.xml file to create a connection pool. Create a JDBC data source and specify the connection settings. Use the JDBC API to access the database from Java code, including getting connections, creating statements, binding parameters, executing queries or updates, and processing results.

MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

The process of starting MySQL in Docker consists of the following steps: Pull the MySQL image to create and start the container, set the root user password, and map the port verification connection Create the database and the user grants all permissions to the database

Laravel is a PHP framework for easy building of web applications. It provides a range of powerful features including: Installation: Install the Laravel CLI globally with Composer and create applications in the project directory. Routing: Define the relationship between the URL and the handler in routes/web.php. View: Create a view in resources/views to render the application's interface. Database Integration: Provides out-of-the-box integration with databases such as MySQL and uses migration to create and modify tables. Model and Controller: The model represents the database entity and the controller processes HTTP requests.

The key to installing MySQL elegantly is to add the official MySQL repository. The specific steps are as follows: Download the MySQL official GPG key to prevent phishing attacks. Add MySQL repository file: rpm -Uvh https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm Update yum repository cache: yum update installation MySQL: yum install mysql-server startup MySQL service: systemctl start mysqld set up booting
