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

问题描述

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@EnableTransactionManagementpublic 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); }}

问题解答

运行一下即可，看报错信息