【Java】就配置了一个数据源，为什么提示 there is more than one bean of "DataSource" type

Z时代
2024-01-10
分类：技术分享

【Java】就配置了一个数据源，为什么提示 there is more than one bean of

我好像就配置了一个数据源，为什么注入的时候会提示有多个？

package com.example.demo.config;
import org.apache.commons.dbcp.BasicDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
@Configuration
@PropertySource("classpath:application.properties")
public class DataSourceConfiguration {
@Value("${jdbc.driver}")
private String driver;
@Value("${jdbc.url}")
private String url;
@Value("${jdbc.username}")
private String username;
@Value("${jdbc.password}")
private String password;
@Value("${jdbc.maxActive}")
private int maxActive;
@Value("${jdbc.maxIdel}")
private int maxIdel;
@Value("${jdbc.maxWait}")
private long maxWait;
@Bean
//应该就这一个吧
public BasicDataSource dataSource(){
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName(driver);
dataSource.setUrl(url);
dataSource.setUsername(username);
dataSource.setPassword(password);
dataSource.setMaxActive(maxActive);
dataSource.setMaxIdle(maxIdel);
dataSource.setMaxWait(maxWait);
dataSource.setValidationQuery("SELECT 1");
dataSource.setTestOnBorrow(true);
return dataSource;
}
}

package com.example.demo.config;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.TransactionManagementConfigurer;
import javax.annotation.Resource;
import javax.annotation.Resources;
import javax.sql.DataSource;
@Configuration
@EnableTransactionManagement
public class MyBatisConfig implements TransactionManagementConfigurer {
@Autowired
//这里怎么不能用@Autowired，用Resource倒是可以
private DataSource dataSource;
@Override
public PlatformTransactionManager annotationDrivenTransactionManager() {
return new DataSourceTransactionManager(dataSource);
}
@Bean(name = "sqlSessionFactory")
public SqlSessionFactory sqlSessionFactoryBean() {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
try {
return bean.getObject();
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
@Bean
public SqlSessionTemplate sqlSessionTemplate(SqlSessionFactory sqlSessionFactory) {
return new SqlSessionTemplate(sqlSessionFactory);
}
}