JDBC persistence overview and module configuration
The JDBC persistence module is a simple solution for relational database (RDBMS) data access. It mainly focuses on the efficiency, ease of use and transparency of data access. It has the following functional characteristics:
- Lightweight encapsulation based on JDBC framework API, simple structure, easy to develop, debug and maintain;
- Optimize batch data update, standardized result set, pre-compiled SQL statement processing;
- Supports single-entity ORM operations without writing SQL statements;
- Provides scaffolding tools to quickly generate data entity classes and supports chain calls;
- Supports custom SQL through memory annotations statement or load SQL from the configuration file and execute it automatically;
- Supports automatic assembly of result sets and value objects, and supports custom assembly rules;
- Supports multiple data sources, and supports C3P0 and DBCP by default , JNDI connection pool configuration, supports data source expansion;
- Supports multiple databases (such as: Oracle, MySQL, SQLServer, etc.);
- Supports object-oriented database query encapsulation, helping to reduce Or reduce program compilation errors;
- Support database transaction nesting;
- Support database stored procedures*;
Maven package dependency
<dependency> <groupId>net.ymate.platform</groupId> <artifactId>ymate-platform-persistence-jdbc</artifactId> <version>2.0-SNAPSHOT</version> </dependency>
Note: Add the above configuration in the project's pom.xml. This module has introduced the core package and persistence by default. Basic package dependencies, no need to repeat configuration.
Module initialization configuration
#------------------------------------- # JDBC持久化模块初始化参数 #------------------------------------- # 默认数据源名称，默认值为default ymp.configs.persistence.jdbc.ds_default_name= # 数据源列表，多个数据源名称间用'|'分隔，默认为default ymp.configs.persistence.jdbc.ds_name_list= # 是否显示执行的SQL语句，默认为false ymp.configs.persistence.jdbc.ds.default.show_sql= # 数据库表前缀名称，默认为空 ymp.configs.persistence.jdbc.ds.default.table_prefix= # 数据源适配器，可选值为已知适配器名称或自定义适配置类名称，默认为default，目前支持已知适配器[default|dbcp|c3p0|jndi|...] ymp.configs.persistence.jdbc.ds.default.adapter_class= # 数据库类型，可选参数，默认值将通过连接字符串分析获得，目前支持[mysql|oracle|sqlserver|db2|sqlite|postgresql|hsqldb|h2] ymp.configs.persistence.jdbc.ds.default.type= # 数据库方言，可选参数，自定义方言将覆盖默认配置 ymp.configs.persistence.jdbc.ds.default.dialect_class= # 数据库连接驱动，可选参数，框架默认将根据数据库类型进行自动匹配 ymp.configs.persistence.jdbc.ds.default.driver_class= # 数据库连接字符串，必填参数 ymp.configs.persistence.jdbc.ds.default.connection_url= # 数据库访问用户名称，必填参数 ymp.configs.persistence.jdbc.ds.default.username= # 数据库访问密码，可选参数，经过默认密码处理器加密后的admin字符串为wRI2rASW58E ymp.configs.persistence.jdbc.ds.default.password= # 数据库访问密码是否已加密，默认为false ymp.configs.persistence.jdbc.ds.default.password_encrypted= # 数据库密码处理器，可选参数，用于对已加密数据库访问密码进行解密，默认为空 ymp.configs.persistence.jdbc.ds.default.password_class=
Supplementary description of configuration parameters:
The database connection string and user name of the data source are required. Others are optional parameters. The simplest configuration is as follows:
ymp.configs.persistence.jdbc.ds.default.connection_url =jdbc:mysql://localhost:3306/mydb
ymp.configs.persistence.jdbc.ds.default.username=root
In order to avoid clear text passwords appearing in the configuration file , the YMP framework provides a default database password processor, or implements it by itself through the IPasswordProcessor interface;
net.ymate.platform.core.support.impl.DefaultPasswordProcessor
