springboot的原则是简化配置，本文试图不通过xml配置，使用configuration配置数据源，并进行简单的数据访问。
并且配置了多数据源，在开发过程中这种场景很容易遇到。
1、依赖
springboot的starter
mybatis的springboot集成包
jdbc
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.1.1</version>
</dependency>
</dependencies>
2、在application中打开configuration
@Configuration
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
3、写主数据源的configuration
1)多数据源中有一个是主数据源，注意@primary注解的书写位置
2)MapperScan basePackages配置了扫描主数据源mapper的路径
3）//bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/sentinel/*.xml"));
注释掉了通过xml配置扩展sql的方式。如果频繁使用多表连接查询，可以打开自定义sql
package com.dqa.sentinel.configuration; 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.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.jdbc.datasource.DataSourceTransactionManager; import javax.sql.DataSource; @Configuration
@MapperScan(basePackages = "com.dqa.sentinel.mapper.sentinel", sqlSessionTemplateRef = "sentinelSqlSessionTemplate")
public class SentinelDataSource { @Bean(name = "sentinelData")
@ConfigurationProperties(prefix = "spring.datasource.sentinel") // application.properteis中对应属性的前缀
@Primary
public DataSource sentinelData() {
return DataSourceBuilder.create().build();
} @Bean(name = "sentinelSqlSessionFactory")
@Primary
public SqlSessionFactory sentinelSqlSessionFactory(@Qualifier("sentinelData") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
//bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/sentinel/*.xml"));
return bean.getObject();
} @Bean(name = "sentinelTransactionManager")
@Primary
public DataSourceTransactionManager sentinelTransactionManager(@Qualifier("sentinelData") DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
} @Bean(name = "sentinelSqlSessionTemplate")
@Primary
public SqlSessionTemplate sentinelSqlSessionTemplate(@Qualifier("sentinelSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
} }
4、比如你还有一个外部数据源，再写一个configuration
tips：这里不能有@primary注解，不然会有冲突
package com.dqa.sentinel.configuration; 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.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
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; @Configuration
@MapperScan(basePackages = "com.dqa.sentinel.mapper.outer", sqlSessionTemplateRef = "outerSqlSessionTemplate")
public class OuterDataSource { @Bean(name = "outerData")
@ConfigurationProperties(prefix = "spring.datasource.outer") // application.properteis中对应属性的前缀
public DataSource outData() {
return DataSourceBuilder.create().build();
} @Bean(name = "outerSqlSessionFactory")
public SqlSessionFactory outerSqlSessionFactory(@Qualifier("outerData") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
//bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/outer/*.xml"));
return bean.getObject();
} @Bean(name = "outerTransactionManager")
public DataSourceTransactionManager outerTransactionManager(@Qualifier("outerData") DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
} @Bean(name = "outerSqlSessionTemplate")
public SqlSessionTemplate outerSqlSessionTemplate(@Qualifier("outerSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
} }
5、在mapper包中定义你需要的sql
路径要和刚才在configuration中配置的一样
package com.dqa.sentinel.mapper.sentinel; import com.dqa.sentinel.model.SentinelClan;
import org.apache.ibatis.annotations.*; import java.util.List; @Mapper
public interface SentinelMapper {
@Select("SELECT * FROM sentinelClan;")
List<SentinelClan> getAllClan(); @Select("SELECT * FROM sentinelClan WHERE id = #{id}")
SentinelClan getOneClan(@Param("id") Integer id); @Insert("INSERT INTO sentinelClan (id,clanName,topicNames,bufferTime,countWidth,countPercent,alarmGroup,status,createTime,updateTime) " +
"VALUES( #{id}, #{clanName}, #{topicNames}, #{bufferTime}, #{countWidth}, #{countPercent}, #{alarmGroup}, #{status}, #{createTime}, #{updateTime})")
int insertOne(SentinelClan sentinelClan); @Update("UPDATE sentinelClan SET clanName = #{clanName},topicNames = #{topicNames},bufferTime = #{bufferTime}," +
"countWidth = #{countWidth},countPercent = #{countPercent},alarmGroup = #{alarmGroup},status = #{status}," +
"createTime=#{createTime}, updateTime=#{updateTime}" +
"WHERE id = #{id}")
int updateOne(SentinelClan sentinelClan);
}
6、model中是实体类
个人爱好写的班班程程的，或者你可以在数据库建表之后使用generator自动生成。
package com.dqa.sentinel.model; import java.sql.Blob;
import java.util.Date; public class SentinelClan {
private Integer id ;
private String clanName;
private String topicNames;
private Integer bufferTime;
private Integer countWidth;
private Integer countPercent;
private String alarmGroup;
private Integer status;
private String createTime;
private String updateTime; public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getClanName() {
return clanName;
}
public void setClanName(String clanName) {
this.clanName = clanName;
}
public String getTopicNames() {
return topicNames;
}
public void setTopicNames(String topicNames) {
this.topicNames = topicNames;
}
public Integer getBufferTime() {
return bufferTime;
}
public void setBufferTime(Integer bufferTime) {
this.bufferTime = bufferTime;
}
public Integer getCountWidth() {
return countWidth;
}
public void setCountWidth(Integer countWidth) {
this.countWidth = countWidth;
}
public Integer getCountPercent() {
return countPercent;
}
public void setCountPercent(Integer countPercent) {
this.countPercent = countPercent;
}
public String getAlarmGroup() {
return alarmGroup;
}
public void setAlarmGroup(String alarmGroup) {
this.alarmGroup = alarmGroup;
}
public Integer getStatus() {
return status;
}
public void setStatus(Integer status) {
this.status = status;
}
public String getCreateTime() {
return createTime;
}
public void setCreateTime(String createTime) {
this.createTime = createTime;
}
public String getUpdateTime() {
return updateTime;
}
public void setUpdateTime(String updateTime) {
this.updateTime = updateTime;
}
}