SpringBoot 使用Druid连接池

1.pom依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.0.20</version>
</dependency>

2.application.properties:

# 数据库访问配置
# 主数据源，默认的
spring.druid.type=com.alibaba.druid.pool.DruidDataSource
spring.druid.url=jdbc:mysql://120.26.130.187:3306/huishi-server?useUnicode=true&characterEncoding=utf-8&useSSL=false
spring.druid.username=root
spring.druid.password=jsy2016memeda

# 下面为连接池的补充设置，应用到上面所有数据源中
# 初始化大小，最小，最大
spring.druid.initialSize=5
spring.druid.minIdle=15
spring.druid.maxActive=120
# 配置获取连接等待超时的时间
spring.druid.maxWait=10000
# 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
spring.druid.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.druid.minEvictableIdleTimeMillis=300000
spring.druid.validationQuery=SELECT 1
spring.druid.testWhileIdle=true
spring.druid.testOnBorrow=true
spring.druid.testOnReturn=false
# 打开PSCache，并且指定每个连接上PSCache的大小
spring.druid.poolPreparedStatements=false
spring.druid.maxPoolPreparedStatementPerConnectionSize=20
# 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
spring.druid.filters=stat,wall,log4j
# 通过connectProperties属性来打开mergeSql功能；慢SQL记录
spring.druid.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合并多个DruidDataSource的监控数据
spring.druid.useGlobalDataSourceStat=true
# 自动提交设置为false
spring.druid.defaultAutoCommit=false

3.配置Druid监控统计功能

import org.springframework.boot.context.properties.ConfigurationProperties;

/**
 * Created by xulingming on 2017/10/27.
 */
@ConfigurationProperties(prefix = "spring.druid")
public class DruidProperties {

    private String type;

    private String url;

    private String username;

    private String password;

    private String driverClassName ;

    private int initialSize;

    private int minIdle;

    private int maxActive;

    private long maxWait;

    private long timeBetweenEvictionRunsMillis;

    private long minEvictableIdleTimeMillis;

    private String validationQuery;

    private boolean testWhileIdle;

    private boolean testOnBorrow;

    private boolean testOnReturn;

    private String poolPreparedStatements;

    private String maxPoolPreparedStatementPerConnectionSize;

    private String filters;

    private String connectionProperties;

    private boolean useGlobalDataSourceStat;

    private boolean defaultAutoCommit;

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getDriverClassName() {
        return driverClassName;
    }

    public void setDriverClassName(String driverClassName) {
        this.driverClassName = driverClassName;
    }

    public int getInitialSize() {
        return initialSize;
    }

    public void setInitialSize(int initialSize) {
        this.initialSize = initialSize;
    }

    public int getMinIdle() {
        return minIdle;
    }

    public void setMinIdle(int minIdle) {
        this.minIdle = minIdle;
    }

    public int getMaxActive() {
        return maxActive;
    }

    public void setMaxActive(int maxActive) {
        this.maxActive = maxActive;
    }

    public long getMaxWait() {
        return maxWait;
    }

    public void setMaxWait(long maxWait) {
        this.maxWait = maxWait;
    }

    public long getTimeBetweenEvictionRunsMillis() {
        return timeBetweenEvictionRunsMillis;
    }

    public void setTimeBetweenEvictionRunsMillis(long timeBetweenEvictionRunsMillis) {
        this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
    }

    public long getMinEvictableIdleTimeMillis() {
        return minEvictableIdleTimeMillis;
    }

    public void setMinEvictableIdleTimeMillis(long minEvictableIdleTimeMillis) {
        this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
    }

    public String getValidationQuery() {
        return validationQuery;
    }

    public void setValidationQuery(String validationQuery) {
        this.validationQuery = validationQuery;
    }

    public boolean getTestWhileIdle() {
        return testWhileIdle;
    }

    public void setTestWhileIdle(boolean testWhileIdle) {
        this.testWhileIdle = testWhileIdle;
    }

    public boolean getTestOnBorrow() {
        return testOnBorrow;
    }

    public void setTestOnBorrow(boolean testOnBorrow) {
        this.testOnBorrow = testOnBorrow;
    }

    public boolean getTestOnReturn() {
        return testOnReturn;
    }

    public void setTestOnReturn(boolean testOnReturn) {
        this.testOnReturn = testOnReturn;
    }

    public String getPoolPreparedStatements() {
        return poolPreparedStatements;
    }

    public void setPoolPreparedStatements(String poolPreparedStatements) {
        this.poolPreparedStatements = poolPreparedStatements;
    }

    public String getMaxPoolPreparedStatementPerConnectionSize() {
        return maxPoolPreparedStatementPerConnectionSize;
    }

    public void setMaxPoolPreparedStatementPerConnectionSize(String maxPoolPreparedStatementPerConnectionSize) {
        this.maxPoolPreparedStatementPerConnectionSize = maxPoolPreparedStatementPerConnectionSize;
    }

    public String getFilters() {
        return filters;
    }

    public void setFilters(String filters) {
        this.filters = filters;
    }

    public String getConnectionProperties() {
        return connectionProperties;
    }

    public void setConnectionProperties(String connectionProperties) {
        this.connectionProperties = connectionProperties;
    }

    public boolean getUseGlobalDataSourceStat() {
        return useGlobalDataSourceStat;
    }

    public void setUseGlobalDataSourceStat(boolean useGlobalDataSourceStat) {
        this.useGlobalDataSourceStat = useGlobalDataSourceStat;
    }

    public boolean isTestWhileIdle() {
        return testWhileIdle;
    }

    public boolean isTestOnBorrow() {
        return testOnBorrow;
    }

    public boolean isTestOnReturn() {
        return testOnReturn;
    }

    public boolean isUseGlobalDataSourceStat() {
        return useGlobalDataSourceStat;
    }

    public boolean isDefaultAutoCommit() {
        return defaultAutoCommit;
    }

    public void setDefaultAutoCommit(boolean defaultAutoCommit) {
        this.defaultAutoCommit = defaultAutoCommit;
    }
}

配置类：

package com.shitou.huishi.domain.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import java.sql.SQLException;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
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.core.env.Environment;

/**
 * Created by xulingming on 2017/10/27.
 */
@Configuration
@EnableConfigurationProperties(DruidProperties.class)
public class DruidConfig {

    @Autowired
    Environment environment;

    @Bean
    public ServletRegistrationBean druidServlet() {
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        // IP白名单
        servletRegistrationBean.addInitParameter("allow", "192.168.2.25,127.0.0.1");
        // IP黑名单(共同存在时，deny优先于allow)
        servletRegistrationBean.addInitParameter("deny", "192.168.1.100");
        //控制台管理用户
        servletRegistrationBean.addInitParameter("loginUsername", "admin");
        servletRegistrationBean.addInitParameter("loginPassword", "admin");
        //是否能够重置数据 禁用HTML页面上的“Reset All”功能
        servletRegistrationBean.addInitParameter("resetEnable", "false");
        return servletRegistrationBean;
    }

    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }

    @Bean
    DataSource dataSource(@Autowired DruidProperties druidProperties) throws Exception {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setUrl(druidProperties.getUrl());
        String[] activeProfiles = environment.getActiveProfiles();
        if (activeProfiles != null && activeProfiles.length > 0) {
            dataSource.setUsername(druidProperties.getUsername());
            dataSource.setPassword(druidProperties.getPassword());
        }
        dataSource.setDefaultAutoCommit(druidProperties.isDefaultAutoCommit());
        dataSource.setDriverClassName(druidProperties.getDriverClassName());
        dataSource.setInitialSize(druidProperties.getInitialSize());
        dataSource.setMinIdle(druidProperties.getMinIdle());
        dataSource.setMaxActive(druidProperties.getMaxActive());
        dataSource.setMaxWait(druidProperties.getMaxWait());
        dataSource.setTimeBetweenEvictionRunsMillis(druidProperties.getTimeBetweenEvictionRunsMillis());
        dataSource.setMinEvictableIdleTimeMillis(druidProperties.getMinEvictableIdleTimeMillis());
        dataSource.setValidationQuery(druidProperties.getValidationQuery());
        dataSource.setTestWhileIdle(druidProperties.getTestWhileIdle());
        dataSource.setTestOnBorrow(druidProperties.getTestOnBorrow());
        dataSource.setTestOnReturn(druidProperties.getTestOnReturn());
        try {
            dataSource.setFilters(druidProperties.getFilters());
        } catch (SQLException e) {
            throw e;
        }
        return dataSource;
    }
}

效果：

访问http://127.0.0.1:8080/druid/index.html

参考：

https://segmentfault.com/a/1190000009132815

https://blog.csdn.net/blueheart20/article/details/52384032

https://www.jianshu.com/p/c8a01ae9f779

https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter

https://www.jianshu.com/p/852bb8cfed6b