Servlet+MyBatis项目转Spring Cloud微服务,多数据源配置修改建议攻略
本攻略将详细讲解如何将Servlet+MyBatis项目转换为Spring Cloud微服务,并提供多数据源配置修改建议,包括实现过程、使用方法、示例说明。
实现过程
1. 添加依赖
在pom.xml
文件中添加以下依赖:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
<version>2.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
<version>2.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
<version>2.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bootstrap</artifactId>
<version>2.2.5.RELEASE</version>
</dependency>
2. 配置Eureka
在application.yml
文件中配置Eureka,例如:
eureka:
client:
service-url:
defaultZone: http://localhost:8761/eureka/
3. 配置Feign
在application.yml
文件中配置Feign,例如:
feign:
client:
config:
default:
connectTimeout: 5000
readTimeout: 5000
4. 配置Config
在bootstrap.yml
文件中配置Config,例如:
spring:
application:
name: user-service
cloud:
config:
uri: http://localhost:8888
profile: dev
label: master
5. 配置多数据源
在application.yml
文件中配置多数据源,例如:
spring:
datasource:
master:
url: jdbc:mysql://localhost:3306/master?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
username: root
password: root
driver-class-name: com.mysql.cj.jdbc.Driver
slave:
url: jdbc:mysql://localhost:3306/slave?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
username: root
password: root
driver-class-name: com.mysql.cj.jdbc.Driver
6. 示例说明
以下是两个示例说明,分别演示了如何将Servlet+MyBatis项目转换为Spring Cloud微服务,并提供多数据源配置修改建议。
示例一:将Servlet+MyBatis项目转换为Spring Cloud微服务
- 添加依赖
在pom.xml
文件中添加以下依赖:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
<version>2.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
<version>2.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
<version>2.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bootstrap</artifactId>
<version>2.2.5.RELEASE</version>
</dependency>
- 配置Eureka
在application.yml
文件中配置Eureka,例如:
eureka:
client:
service-url:
defaultZone: http://localhost:8761/eureka/
- 配置Feign
在application.yml
文件中配置Feign,例如:
feign:
client:
config:
default:
connectTimeout: 5000
readTimeout: 5000
- 配置Config
在bootstrap.yml
文件中配置Config,例如:
spring:
application:
name: user-service
cloud:
config:
uri: http://localhost:8888
profile: dev
label: master
示例二:多数据源配置修改建议
- 在
application.yml
文件中配置多数据源,例如:
spring:
datasource:
master:
url: jdbc:mysql://localhost:3306/master?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
username: root
password: root
driver-class-name: com.mysql.cj.jdbc.Driver
slave:
url: jdbc:mysql://localhost:3306/slave?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
username: root
password: root
driver-class-name: com.mysql.cj.jdbc.Driver
- 在
application.yml
文件中添加以下配置,指定默认数据源:
spring:
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/master?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
username: root
password: root
- 在
MybatisConfig
中添加以下配置,指定多数据源:
@Configuration
@MapperScan(basePackages = "com.example.demo.mapper")
public class MybatisConfig {
@Bean
@ConfigurationProperties(prefix = "spring.datasource.master")
public DataSource masterDataSource() {
return DruidDataSourceBuilder.create().build();
}
@Bean
@ConfigurationProperties(prefix = "spring.datasource.slave")
public DataSource slaveDataSource() {
return DruidDataSourceBuilder.create().build();
}
@Bean
public DynamicDataSource dynamicDataSource() {
Map<Object, Object> targetDataSources = new HashMap<>();
targetDataSources.put(DataSourceType.MASTER.name(), masterDataSource());
targetDataSources.put(DataSourceType.SLAVE.name(), slaveDataSource());
return new DynamicDataSource(masterDataSource(), targetDataSources);
}
}
总结
将Servlet+MyBatis项目转换为Spring Cloud微服务可以方便地处理微服务间的服务注册和发现,提高系统的可靠性和稳定性。在实际应用中,我们可以根据具体情况选择合适的实现方式和配置方式,满足业务需求和技术发展。同时,多数据源配置也是一个重要的问题,我们可以根据上述示例进行修改和优化,提高系统的性能和可维护性。
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