SpringBoot整合Druid数据连接池_Java

springboot整合druid数据连接池

druid是什么？

druid是alibaba开源的的数据库连接池。druid能够提供强大的监控和扩展功能。

在哪里下载druid

maven中央仓库:

怎么获取druid的源码

druid是一个开源项目，源码托管在github上，源代码仓库地址是。同时每次druid发布正式版本和快照的时候，都会把源码打包，你可以从上面的下载地址中找到相关版本的源码

怎么配置maven

<dependency>
    <groupid>com.alibaba</groupid>
    <artifactid>druid</artifactid>
    <!-- 可通过中央仓库获取最新的版本号，这里用我项目中的版本号 -->
    <version>1.0.11</version>
</dependency>

开始配置

首先是 application.properties

# 数据库配置
spring.datasource.driver-class-name=com.mysql.jdbc.driver
# 注：此处必须用 druid 的数据源
spring.datasource.type=com.alibaba.druid.pool.druiddatasource
spring.datasource.name=test
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.initialsize=5
spring.datasource.minidle=5
spring.datasource.maxactive=10
spring.datasource.maxwait=60000
spring.datasource.timebetweenevictionrunsmillis=3600000
spring.datasource.minevictableidletimemillis=3600000
spring.datasource.validationquery=select 'x'
spring.datasource.testwhileidle=true
spring.datasource.testonborrow=true
spring.datasource.testonreturn=false
spring.datasource.poolpreparedstatements=true
spring.datasource.maxpoolpreparedstatementperconnectionsize=20
spring.datasource.filters=stat,wall,slf4j
spring.datasource.connectionproperties=druid.stat.mergesql=true;druid.stat.slowsqlmillis=5000
spring.datasource.useglobaldatasourcestat=true

# druid 登录信息
druid.config.user-name=root
druid.config.password=root
druid.config.url-mapping=/druid/*

封装数据库配置到 java bean

@configuration
@configurationproperties(prefix = "spring.datasource")
public class dbproperties {
    private string url;
    private string username;
    private string password;
    private string driverclassname;
    private int initialsize;
    private int minidle;
    private int maxactive;
    private int maxwait;
    private int timebetweenevictionrunsmillis;
    private int minevictableidletimemillis;
    private string validationquery;
    private boolean testwhileidle;
    private boolean testonborrow;
    private boolean testonreturn;
    private boolean poolpreparedstatements;
    private int maxpoolpreparedstatementperconnectionsize;
    private string filters;
    private string connectionproperties;
    private boolean useglobaldatasourcestat;

    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 int getmaxwait() {
        return maxwait;
    }

    public void setmaxwait(int maxwait) {
        this.maxwait = maxwait;
    }

    public int gettimebetweenevictionrunsmillis() {
        return timebetweenevictionrunsmillis;
    }

    public void settimebetweenevictionrunsmillis(int timebetweenevictionrunsmillis) {
        this.timebetweenevictionrunsmillis = timebetweenevictionrunsmillis;
    }

    public int getminevictableidletimemillis() {
        return minevictableidletimemillis;
    }

    public void setminevictableidletimemillis(int minevictableidletimemillis) {
        this.minevictableidletimemillis = minevictableidletimemillis;
    }

    public string getvalidationquery() {
        return validationquery;
    }

    public void setvalidationquery(string validationquery) {
        this.validationquery = validationquery;
    }

    public boolean istestwhileidle() {
        return testwhileidle;
    }

    public void settestwhileidle(boolean testwhileidle) {
        this.testwhileidle = testwhileidle;
    }

    public boolean istestonborrow() {
        return testonborrow;
    }

    public void settestonborrow(boolean testonborrow) {
        this.testonborrow = testonborrow;
    }

    public boolean istestonreturn() {
        return testonreturn;
    }

    public void settestonreturn(boolean testonreturn) {
        this.testonreturn = testonreturn;
    }

    public boolean ispoolpreparedstatements() {
        return poolpreparedstatements;
    }

    public void setpoolpreparedstatements(boolean poolpreparedstatements) {
        this.poolpreparedstatements = poolpreparedstatements;
    }

    public int getmaxpoolpreparedstatementperconnectionsize() {
        return maxpoolpreparedstatementperconnectionsize;
    }

    public void setmaxpoolpreparedstatementperconnectionsize(int 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 isuseglobaldatasourcestat() {
        return useglobaldatasourcestat;
    }

    public void setuseglobaldatasourcestat(boolean useglobaldatasourcestat) {
        this.useglobaldatasourcestat = useglobaldatasourcestat;
    }

}

@configuration
@configurationproperties(prefix = "druid.config")
public class druidproperties {

    private string username;

    private string password;

    private string urlmapping;

    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 geturlmapping() {
        return urlmapping;
    }

    public void seturlmapping(string urlmapping) {
        this.urlmapping = urlmapping;
    }
}

配置数据源

/**
 * 持久层相关配置
 */
@configuration
public class sessionfactoryconfig {

    private static final logger logger = loggerfactory.getlogger(sessionfactoryconfig.class);

    private final dbproperties db;

    @autowired
    public sessionfactoryconfig(dbproperties db) {
        this.db = db;
    }

    /**
     * 创建数据源
     */
    @bean
    // 如果访问 druid 时数据源页面显示 (*) property for user to setup 可用下面的 bean 注入方式
    // @bean(destroymethod = "close", initmethod = "init")
    @primary
    public datasource datasource() {
        final druiddatasource datasource = new druiddatasource();
        datasource.seturl(db.geturl());
        datasource.setusername(db.getusername());
        datasource.setpassword(db.getpassword());
        datasource.setdriverclassname(db.getdriverclassname());
        datasource.setinitialsize(db.getinitialsize());
        datasource.setminidle(db.getminidle());
        datasource.setmaxactive(db.getmaxactive());
        datasource.setmaxwait(db.getmaxwait()); datasource.settimebetweenevictionrunsmillis(db.gettimebetweenevictionrunsmillis());
        datasource.setminevictableidletimemillis(db.getminevictableidletimemillis());
        datasource.setvalidationquery(db.getvalidationquery());
        datasource.settestonreturn(db.istestonreturn());
        datasource.setpoolpreparedstatements(db.ispoolpreparedstatements());
        datasource.setmaxpoolpreparedstatementperconnectionsize(db.getmaxpoolpreparedstatementperconnectionsize());
        datasource.setuseglobaldatasourcestat(db.isuseglobaldatasourcestat());
        try {
            datasource.setfilters(db.getfilters());
        } catch (sqlexception e) {
            logger.info("druid configuration initialization filter: " + e);
        }
        datasource.setconnectionproperties(db.getconnectionproperties());
        return datasource;
    }
}

druid连接池配置

/**
 * druid连接池配置
 */
@configuration
public class druidconfiguration {

    private static final logger logger = loggerfactory.getlogger(druidconfiguration.class);

    private final druidproperties druidproperties;

    @autowired
    public druidconfiguration(druidproperties dp) {
        this.druidproperties = dp;
    }

    /**
     * 访问路径及用户名、密码
     */
    @bean
    public servletregistrationbean druidconfig() {
        logger.info("init druid servlet configuration ");
        final servletregistrationbean srb = new servletregistrationbean();
        srb.setservlet(new statviewservlet());
        logger.info("druid config info --> {}", druidproperties);
        srb.addurlmappings(druidproperties.geturlmapping());
        srb.addinitparameter("loginusername", druidproperties.getusername());
        srb.addinitparameter("loginpassword", druidproperties.getpassword());
        return srb;
    }

    /**
     * 配置过滤器
     */
    @bean
    public filterregistrationbean filterregistrationbean() {
        final filterregistrationbean filterregistrationbean = new filterregistrationbean();
        filterregistrationbean.setfilter(new webstatfilter());
        filterregistrationbean.addurlpatterns("/*");
        filterregistrationbean.addinitparameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterregistrationbean;
    }
}

委托druid进行spring 监控

/**
 * 委托druid进行spring 监控
 */
@configuration
public class springmonitoringconfig {

    @bean(name = "druid-stat-interceptor")
    public druidstatinterceptor druidstatinterceptor() {
        return new druidstatinterceptor();
    }

    @bean(name = "druid-stat-pointcut")
    // 非单例
    @scope("prototype")
    public jdkregexpmethodpointcut druidstatpointcut() {
        final jdkregexpmethodpointcut pointcut = new jdkregexpmethodpointcut();
        pointcut.setpatterns("com.ajm.punch_the_clock.controller.*", "com.ajm.punch_the_clock.mapper.*");
        return pointcut;
    }

    @bean
    public defaultpointcutadvisor druidstatadvisor(@qualifier("druid-stat-interceptor") final druidstatinterceptor druidstatinterceptor,
                                                   @qualifier("druid-stat-pointcut") final jdkregexpmethodpointcut druidstatpointcut) {
        final defaultpointcutadvisor defaultpointadvisor = new defaultpointcutadvisor();
        defaultpointadvisor.setpointcut(druidstatpointcut);
        defaultpointadvisor.setadvice(druidstatinterceptor);
        return defaultpointadvisor;
    }

}