SpringBoot(三):多資料來源配置
阿新 • • 發佈:2018-12-09
簡介
說起多資料來源,一般都來解決那些問題呢,主從模式或者業務比較複雜需要連線不同的分庫來支援業務,配置多資料來源重點是配置檔案,所以資料庫,pox檔案,實體類我都不發出來了,自己建立兩個資料庫,配置實體類就行了 版權宣告:本文由 低調小熊貓 發表於 低調小熊貓的部落格 轉載宣告:自由轉載-非商用-非衍生-保持署名,非商業轉載請註明作者及出處,商業轉載請聯絡作者本人qq:2696284032 文章連結:https://aodeng.cc/archives/springboot-san
排除自動配置
springboot會自動讀取配置檔案,由於我們需要配置多資料來源,所以要排除自動配置,在啟動入口新增如下註解
@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
配置資料來源
在application.yml中配置兩個資料來源
spring: datasource: first: driverClassName: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/XXX?useUnicode=true&characterEncoding=UTF-8&useSSL=false username: XXX password: XXX type: com.alibaba.druid.pool.DruidDataSource initial-size: 1 minIdle: 3 maxActive: 20 maxWait: 60000 filters: stat,wall,slf4j second: driverClassName: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/XXX?useUnicode=true&characterEncoding=UTF-8&useSSL=false username: XXX password: XXX type: com.alibaba.druid.pool.DruidDataSource
建立配置檔案封裝類
package com.ad.core.hope.config; import lombok.Data; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.stereotype.Component; /** * @program:hope * @author:aodeng * @create:2018-08-31 13:46 **/ @Data @Component @ConfigurationProperties(prefix = "spring.datasource.first") public class FirstDataProperties { String driverClassName; String url; String username; String password; }
2.SecondDataProperties類
package com.ad.core.hope.config;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
/**
* @program:hope
* @author:aodeng
* @create:2018-08-31 13:47
**/
@Data
@Component
@ConfigurationProperties(prefix = "spring.datasource.second")
public class SecondDataProperties {
String driverClassName;
String url;
String username;
String password;
}
資料來源配置
這裡面的程式碼才是最重要的 注:@Primary必須使用該註解指定主資料來源@MapperScan指定路徑下的mapper使用該資料來源1.FirstDataSourceConfig配置
package com.ad.core.hope.config;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;
/**
* @program:hope
* @author:aodeng
* @create:2018-08-02 20:16
**/
@Configuration
@MapperScan(basePackages = "com.ad.core.hope.mapper.first",sqlSessionTemplateRef = "firstSqlSessionTemplate")
public class FirstDataSourceConfig {
@Autowired
private FirstDataProperties firstprop;
//建立資料來源
@Bean(name="firstDataSource")
@ConfigurationProperties(prefix = "spring.datasource.first")
public DataSource getFirstDataSource(){
DataSource build = DataSourceBuilder.create()
.driverClassName(firstprop.driverClassName)
.url(firstprop.url)
.username(firstprop.username)
.password(firstprop.password).build();
return build;
}
//建立SqlSessionFactory
@Bean(name = "firstSqlSessionFactory")
public SqlSessionFactory firstSqlSessionFactory(@Qualifier("firstDataSource") DataSource dataSource) throws Exception{
SqlSessionFactoryBean bean=new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
return bean.getObject();
}
//建立事務管理器
@Bean(name = "firstTransactionManager")
public DataSourceTransactionManager firstTransactionManager(@Qualifier("firstDataSource") DataSource dataSource){
return new DataSourceTransactionManager(dataSource);
}
//建立SqlSessionTemplate
@Bean(name = "firstSqlSessionTemplate")
public SqlSessionTemplate firstSqlSessionTemplate(@Qualifier("firstSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception{
return new SqlSessionTemplate(sqlSessionFactory);
}
private Class getType(String type){
try {
return Class.forName(type);
}catch (ClassNotFoundException e){
e.printStackTrace();
}
return null;
}
}
2.SecondDataSourceConfig配置
package com.ad.core.hope.config;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;
/**
* @program:hope
* @author:aodeng
* @create:2018-08-02 20:16
**/
@Configuration
@MapperScan(basePackages = "com.ad.core.hope.mapper.second",sqlSessionTemplateRef = "secondSqlSessionTemplate")
public class SecondDataSourceConfig {
@Autowired
private SecondDataProperties secondprop;
//建立資料來源
@Bean(name="secondDataSource")
@ConfigurationProperties(prefix = "spring.datasource.second")
@Primary
public DataSource getSecondDataSource(){
DataSource build = DataSourceBuilder.create()
.driverClassName(secondprop.driverClassName)
.url(secondprop.url)
.username(secondprop.username)
.password(secondprop.password).build();
return build;
}
//建立SqlSessionFactory
@Bean(name = "secondSqlSessionFactory")
@Primary
public SqlSessionFactory secondSqlSessionFactory(@Qualifier("secondDataSource") DataSource dataSource) throws Exception{
SqlSessionFactoryBean bean=new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
return bean.getObject();
}
//建立事務管理器
@Bean(name = "secondTransactionManager")
@Primary
public DataSourceTransactionManager secondTransactionManager(@Qualifier("secondDataSource") DataSource dataSource){
return new DataSourceTransactionManager(dataSource);
}
//建立SqlSessionTemplate
@Bean(name = "secondSqlSessionTemplate")
@Primary
public SqlSessionTemplate secondSqlSessionTemplate(@Qualifier("secondSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception{
return new SqlSessionTemplate(sqlSessionFactory);
}
private Class getType(String type){
try {
return Class.forName(type);
}catch (ClassNotFoundException e){
e.printStackTrace();
}
return null;
}
}
實現Mapper
注:該mapper的路徑必須和@MapperScan註解的指定路徑一樣1.first路徑下的mapepr
package com.ad.core.hope.mapper.first;
import com.ad.core.hope.enums.TestUserEnum;
import com.ad.core.hope.vo.base.TestVo;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Result;
import org.apache.ibatis.annotations.Results;
import org.apache.ibatis.annotations.Select;
import java.util.List;
@Mapper
public interface TestInterface {
@Select("SELECT * FROM user")
@Results({
@Result(property = "sex", column = "sex", javaType = TestUserEnum.class),
@Result(property = "name", column = "username")
})
List<TestVo> getAll();
}
2.second路徑下的mapper
package com.ad.core.hope.mapper.second;
import com.ad.core.hope.model.admin.SysUser;
import org.apache.ibatis.annotations.Result;
import org.apache.ibatis.annotations.Results;
import org.apache.ibatis.annotations.Select;
import java.util.List;
/**
* @program:hope
* @author:aodeng
* @create:2018-09-02 17:25
**/
@org.apache.ibatis.annotations.Mapper
public interface TestMapper{
@Select("SELECT * FROM sys_user")
@Results({
@Result(property = "userid", column = "userId"),
@Result(property = "username", column = "username")
})
List<SysUser> getAll();
}
Controller使用
@Controller
public class TeseController {
@Autowired
private TestInterface testInterface;
@Autowired
private TestMapper testMapper;
@RequestMapping("/login")
public String login(Model model){
//資料來源first測試
List<TestVo> list=testInterface.getAll();
for(int i=0;i<list.size();i++){
System.out.println("測試fisrt資料來源"+list.get(i).getName());
}
//資料來源second測試
List<SysUser> user=testMapper.getAll();
for(int i=0;i<user.size();i++){
System.out.println("測試second資料來源"+user.get(i).getUsername());
}
return "admin/system_login";
}
}
最後
程式碼開源地址
https://github.com/java-aodeng/hope