虽然spring boot提供了4种数据源的配置，但是如果要使用其他的数据源怎么办？例如，有人就是喜欢druid可以监控的强大功能，有些人项目的需要使用c3p0，那么，我们就没办法了吗？我们就要编程式新建一个数据源了吗？不用了！spring boot 1.4.1.RELEASE为我们提供了简洁的方式使用自己想要的数据源。
网上也有其他数据源的配置方法，但是都是编程式新建一个数据源，太繁琐了。我在这里记录一下官网的做法：
1、Configure a DataSource
官网介绍：http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#howto-configure-a-datasource
@Configuration
@EnableConfigurationProperties(DataSourceProperties.class)
public class DruidConfiguration { @Bean
@ConfigurationProperties(prefix="spring.datasource.druid")
public DataSource dataSource(DataSourceProperties properties) {
return properties.initializeDataSourceBuilder()
// additional customizations
.build();
}
}
说明：@ConfigurationProperties(prefix="spring.datasource.druid")，前缀可以自己随意。
2、配置文件
spring:
datasource:
name: test
url: jdbc:mysql://localhost:3306/test
username: root
password: root
# 使用druid数据源
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.jdbc.Driver
druid:
filters: stat,wall,log4j
maxActive: 20
initialSize: 1
maxWait: 60000
minIdle: 1
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: true
maxOpenPreparedStatements: 20
以上步骤就配置好druid了，在验证druid的配置属性是否有成功注入的时候，可以注入DataSource，断点观察DataSource的属性validationQuery是否和你写的一样。
3、配置提示
有强迫症可以看看，这个是配置提示的功能，不是必要项。
添加依赖：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
在resources下新建META-INF，在建一个additional-spring-configuration-metadata.json文件
{
"properties": [
{
"name": "spring.datasource.druid.maxActive",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.maxActive."
},
{
"name": "spring.datasource.druid.initialSize",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.initialSize."
},
{
"name": "spring.datasource.druid.filters",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.filters."
},
{
"name": "spring.datasource.druid.maxWait",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.maxWait."
},
{
"name": "spring.datasource.druid.minIdle",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.minIdle."
},
{
"name": "spring.datasource.druid.timeBetweenEvictionRunsMillis",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.timeBetweenEvictionRunsMillis."
},
{
"name": "spring.datasource.druid.minEvictableIdleTimeMillis",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.minEvictableIdleTimeMillis."
},
{
"name": "spring.datasource.druid.validationQuery",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.validationQuery."
},
{
"name": "spring.datasource.druid.testWhileIdle",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.testWhileIdle."
},
{
"name": "spring.datasource.druid.testOnBorrow",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.testOnBorrow."
},
{
"name": "spring.datasource.druid.testOnReturn",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.testOnReturn."
},
{
"name": "spring.datasource.druid.poolPreparedStatements",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.poolPreparedStatements."
},
{
"name": "spring.datasource.druid.maxOpenPreparedStatements",
"type": "java.lang.String",
"description": "Description for spring.datasource.druid.maxOpenPreparedStatements."
}
]
}
这样在使用druid的时候IDEA就会出现提示了。
注意：如果没有出现提示，可以断点数据源，观察相应的配置就行了(大概):)
4、druid监控
网上有很多例子，这个就不多说了。
/**
* 注册一个StatViewServlet
* @return
*/
@Bean
public ServletRegistrationBean druidStatViewServle(){
//org.springframework.boot.context.embedded.ServletRegistrationBean提供类的进行注册.
ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*"); //添加初始化参数：initParams //白名单：
//servletRegistrationBean.addInitParameter("allow","127.0.0.1");
//IP黑名单 (存在共同时，deny优先于allow) : 如果满足deny的话提示:Sorry, you are not permitted to view this page.
//servletRegistrationBean.addInitParameter("deny","192.168.1.73");
//登录查看信息的账号密码.
//servletRegistrationBean.addInitParameter("loginUsername","admin2");
//servletRegistrationBean.addInitParameter("loginPassword","123456");
//是否能够重置数据.
servletRegistrationBean.addInitParameter("resetEnable","false");
return servletRegistrationBean;
} /**
* 注册一个：filterRegistrationBean
* @return
*/
@Bean
public FilterRegistrationBean druidStatFilter(){ FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter()); //添加过滤规则.
filterRegistrationBean.addUrlPatterns("/*"); //添加不需要忽略的格式信息.
filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
return filterRegistrationBean;
}
怎么使用可以看druid官网。