2015-04-02 05:04:28 +00:00
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### 67.1. 配置一个数据源
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想要覆盖默认的设置只需要定义一个你自己的DataSource类型的`@Bean`。Spring Boot提供一个工具构建类DataSourceBuilder，可用来创建一个标准的DataSource（如果它处于classpath下），或者仅创建你自己的DataSource，然后将它和在[Section 23.7.1, “Third-party configuration”](http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#boot-features-external-config-3rd-party-configuration)解释的一系列Environment属性绑定。
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比如：
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```java
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@Bean
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@ConfigurationProperties(prefix="datasource.mine")
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public DataSource dataSource() {
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return new FancyDataSource();
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}
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```
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```java
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datasource.mine.jdbcUrl=jdbc:h2:mem:mydb
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datasource.mine.user=sa
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datasource.mine.poolSize=30
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```
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具体参考'Spring Boot特性'章节中的[Section 28.1, “Configure a DataSource”](http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#boot-features-configure-datasource)和[DataSourceAutoConfiguration](http://github.com/spring-projects/spring-boot/tree/master/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jdbc/DataSourceAutoConfiguration.java)类源码。
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