一、SpringBoot引入Druid的依赖包
Xml代码
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>com.alibaba</groupId>
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<artifactId>druid</artifactId>
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<version>1.1.9</version>
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</dependency>
二、设置配置文件application.properties
Java代码
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spring.datasource.url=jdbc:mysql://192.168.1.166:3306/study
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spring.datasource.driver-class-name=com.mysql.jdbc.Driver
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spring.datasource.username=root
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spring.datasource.password=root
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spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
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#spring.datasource.schema=
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#数据源其他配置，需要增加Druid的配置类（不然不生效）
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#配置见：com.lqy.springboot.datasource.druid.DruidConfig
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spring.datasource.initialSize=5
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spring.datasource.minIdle=5
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spring.datasource.maxActive=20
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spring.datasource.maxWait=60000
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spring.datasource.timeBetweenEvictionRunsMillis=60000
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spring.datasource.minEvictableIdleTimeMillis=300000
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spring.datasource.validationQuery=SELECT 1 FROM DUAL
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spring.datasource.testWhileIdle=true
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spring.datasource.testOnBorrow=false
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spring.datasource.testOnReturn=false
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spring.datasource.poolPreparedStatements=true
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#配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
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spring.datasource.filters=stat,wall,log4j
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spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
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spring.datasource.useGlobalDataSourceStat=true
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spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
三、增加Druid自定义配置类
为什么要增加呢？
因为SpringBoot本身提供的配置只是部分的数据库连接配置，很多Druid需要的属性配置是没有的，如：
Java代码
1. spring.datasource.initialSize
这个属性，SpringBoot是没有的，只有Druid才有，所以需要增加相应的配置类，自动注入。
DruidConfig 类：
Java代码
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.Map;
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import javax.sql.DataSource;
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import org.springframework.boot.context.properties.ConfigurationProperties;
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import org.springframework.boot.web.servlet.FilterRegistrationBean;
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import org.springframework.boot.web.servlet.ServletRegistrationBean;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import com.alibaba.druid.pool.DruidDataSource;
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import com.alibaba.druid.support.http.StatViewServlet;
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import com.alibaba.druid.support.http.WebStatFilter;
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/**
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* 导入druid数据源，扩展相关的配置属性
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*
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*/
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@Configuration
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public class DruidConfig {
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/**
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* 配置Druid的属性，和DataSource进行绑定，前缀设置为：spring.datasource
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* 不配置的话，很多初始化的属性是没有绑定的
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* @return
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*/
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@ConfigurationProperties(prefix="spring.datasource")
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public DataSource druid() {
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return new DruidDataSource();
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}
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/**
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* 配置druid监控
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* 配置一个管理后台的servlet
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* 访问地址：http://localhost:8080/druid/
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* @return
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*/
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@Bean
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public ServletRegistrationBean statViewServlet() {
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ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
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Map<String, String> initParameters = new HashMap<String, String>();
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initParameters.put("loginUsername", "admin");//属性见：com.alibaba.druid.support.http.ResourceServlet
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initParameters.put("loginPassword", "123456");
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initParameters.put("allow", "");//默认允许所有
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initParameters.put("deny", "");
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bean.setInitParameters(initParameters);
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return bean;
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}
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/**
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* 配置一个web监控的filter
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* @return
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*/
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@Bean
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public FilterRegistrationBean webStatFilter() {
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FilterRegistrationBean filterBean = new FilterRegistrationBean();
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filterBean.setFilter(new WebStatFilter());
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filterBean.setUrlPatterns(Arrays.asList("/*"));
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Map<String, String> initParameters = new HashMap<String, String>();
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initParameters.put("exclusions", "*.js,*.css,/druid/*");//属性见：com.alibaba.druid.support.http.WebStatFilter
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filterBean.setInitParameters(initParameters);
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return filterBean;
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}
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}
四、启动项目，测试数据源连接：
Java代码
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import java.sql.Connection;
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import java.sql.SQLException;
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import javax.sql.DataSource;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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@RestController
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public class DataSourceController {
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@Autowired
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private DataSource dataSource;
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@RequestMapping("/dataSource")
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public String dataSource() {
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try {
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System.out.println("dataSource = "+dataSource);
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Connection conn = dataSource.getConnection();
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System.out.println("conn = "+conn);
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return "success";
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} catch (SQLException e) {
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e.printStackTrace();
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}
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return "end.";
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}
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}
五、查看Druid的监控
浏览器打开：http://localhost:8080/druid
登录的账号密码在DruidConfig类配置有
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