摘要：本文主要介绍如何基于SpringBoot+hutool实现项目的多数据源。在我们已有的一些复杂项目如果想直接基于默认的DataSource实现多数据源代价比较大，而我们可以通过hutool的db工具类来实现小型业务的数据库连接，并不会影响主流程业务。
案例实现
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.example</groupId>
<artifactId>huzhihui-sp3-home</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>sp3-hutool</artifactId>
<packaging>jar</packaging>
<name>sp3-hutool</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.8.39</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>com.zaxxer</groupId>
<artifactId>HikariCP</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-external-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/lib/external</outputDirectory>
<includeScope>compile</includeScope>
<excludeGroupIds>cn.hutool</excludeGroupIds>
</configuration>
</execution>
<execution>
<id>copy-internal-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/lib/internal</outputDirectory>
<includeScope>compile</includeScope>
<includeGroupIds>cn.hutool</includeGroupIds>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>21</source>
<target>21</target>
<encoding>UTF-8</encoding>
<!-- 如果使用预览特性 -->
<compilerArgs>
<arg>--enable-preview</arg>
</compilerArgs>
<release>21</release>
</configuration>
</plugin>
</plugins>
</build>
</project>
DataSourceConfig
数据源配置，我这里使用的写死的配置，实际过程中可以切换为从配置文件中读取，或者从数据库中读取
@Configuration
public class DataSourceConfig {
@Bean
public Db masterDb() {
// 打印日志
SqlLog.INSTANCE.init(true, true, true, Level.INFO);
HikariConfig hikariConfig = new HikariConfig();
hikariConfig.setDriverClassName("com.mysql.cj.jdbc.Driver");
hikariConfig.setJdbcUrl("jdbc:mysql://192.168.8.134:30635/test_1?useSSL=false&serverTimezone=UTC");
hikariConfig.setUsername("super_admin");
hikariConfig.setPassword("super_admin");
return Db.use(new HikariDataSource(hikariConfig));
}
}
DbController测试类
@RestController
@RequestMapping(value = "/db")
public class DbController {
@Autowired
private Db db;
@GetMapping(value = "/all")
public Object all() throws Exception {
List<Entity> query = db.query("select * from databasechangelog");
for (Entity entity : query) {
entity.forEach((key, value) -> System.out.println(key + ":" + value));
}
return query;
}
@GetMapping(value = "/school")
public Object school() throws Exception {
List<School> query = db.query("select * from school", School.class);
return query;
}
@Data
public static class School {
private Long id;
private String name;
private LocalDateTime createTime;
private LocalDateTime timeZone;
private LocalDateTime timeNoZone;
}
}
