https://blog.csdn.net/wangmx1993328/article/details/81865153

springboot 使用DruidDataSource 数据源

一、添加依赖

    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.0.26</version>
    </dependency>

二、配置application.yml

spring:
    datasource:
url: jdbc:mysql://127.0.0.1:3306/mxntest?characterEncoding=UTF-8
username: root
password: root
driver-class-name: com.mysql.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource
# 初始化大小，最小，最大
initialSize: 5
minIdle: 5
maxActive: 50
# 配置获取连接等待超时的时间
maxWait: 60000

三、Druid数据源配置

package com.example.demo.config;

/**
 * @author 12084
 * @create 2018-08-09 11:27
 */

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

/**
 * Druid数据源配置
 */
@Configuration
public class DataSourceConfig {

private static String dbUrl;

private static String username;

private static String password;

private static String driverClassName;

private static int initialSize;

private static int minIdle;

private static int maxActive;

private static int maxWait;

/**
 * 注册DruidServlet
 *
 * @return
 */
@Bean
public ServletRegistrationBean druidServletRegistrationBean() {
    ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean();
    servletRegistrationBean.setServlet(new StatViewServlet());
    servletRegistrationBean.addUrlMappings("/druid/*");
    //登录查看信息的账号密码.
    servletRegistrationBean.addInitParameter("loginUsername", "admin");
    servletRegistrationBean.addInitParameter("loginPassword", "123456");
    return servletRegistrationBean;
}

/**
 * 注册DruidFilter拦截
 *
 * @return
 */
@Bean
public FilterRegistrationBean druidFilterRegistrationBean() {
    FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
    filterRegistrationBean.setFilter(new WebStatFilter());
    Map<String, String> initParams = new HashMap<String, String>();
    //设置忽略请求
    initParams.put("exclusions", "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*");
    filterRegistrationBean.setInitParameters(initParams);
    filterRegistrationBean.addUrlPatterns("/*");
    return filterRegistrationBean;
}

/**
 * 配置DataSource
 * @return
 * @throws SQLException
 */
@Bean(initMethod = "init",destroyMethod = "close")
@Primary
public DataSource dataSource() throws SQLException {
    DruidDataSource druidDataSource = new DruidDataSource();
    druidDataSource.setUsername(username);
    druidDataSource.setPassword(password);
    druidDataSource.setUrl(dbUrl);
    druidDataSource.setFilters("stat,wall");
    druidDataSource.setInitialSize(initialSize);
    druidDataSource.setMinIdle(minIdle);
    druidDataSource.setMaxActive(maxActive);
    druidDataSource.setMaxWait(maxWait);
    druidDataSource.setUseGlobalDataSourceStat(true);
    druidDataSource.setDriverClassName(driverClassName);
    return druidDataSource;
}

@Value("${spring.datasource.url}")
public void setDbUrl(String dbUrl) {
    DataSourceConfig.dbUrl = dbUrl;
}

@Value("${spring.datasource.username}")
public void setUsername(String username) {
    DataSourceConfig.username = username;
}

@Value("${spring.datasource.password}")
public void setPassword(String password) {
    DataSourceConfig.password = password;
}

@Value("${spring.datasource.driver-class-name}")
public void setDriverClassName(String driverClassName) {
    DataSourceConfig.driverClassName = driverClassName;
}

@Value(value = "${spring.datasource.initialSize}")
public void setInitialSize(int initialSize) {
    DataSourceConfig.initialSize = initialSize;
}

@Value(value = "${spring.datasource.minIdle}")
public void setMinIdle(int minIdle) {
    DataSourceConfig.minIdle = minIdle;
}

@Value(value = "${spring.datasource.maxActive}")
public void setMaxActive(int maxActive) {
    DataSourceConfig.maxActive = maxActive;
}

@Value(value = "${spring.datasource.maxWait}")
public void setMaxWait(int maxWait) {
    DataSourceConfig.maxWait = maxWait;
}

}

四、http://localhost:8080/druid/index.html 就可以查看，如果配置密码则输入密码

    //登录查看信息的账号密码.
    servletRegistrationBean.addInitParameter("loginUsername", "admin");
    servletRegistrationBean.addInitParameter("loginPassword", "123456");