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Spring Boot使用和配置Druid

2019年07月22日 | 移动技术网IT编程 | 我要评论

1、引入依赖包

<!--druid-->
<dependency>
  <groupid>com.alibaba</groupid>
  <artifactid>druid</artifactid>
  <version>1.0.27</version>
</dependency>

2、配置application.properties

spring.datasource.type=com.alibaba.druid.pool.druiddatasource
spring.datasource.url=jdbc:mysql://localhost:3306/xxxxx?characterencoding=utf8&usessl=true&verifyservercertificate=false
spring.datasource.username=root
spring.datasource.password=xxxxx
spring.datasource.driver-class-name=com.mysql.jdbc.driver
# 初始化大小，最小，最大
spring.datasource.initialsize=5
spring.datasource.minidle=5
spring.datasource.maxactive=20
# 配置获取连接等待超时的时间
spring.datasource.maxwait=60000
# 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.datasource.timebetweenevictionrunsmillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.minevictableidletimemillis=300000
spring.datasource.validationquery=select 1 from dual
spring.datasource.testwhileidle=true
spring.datasource.testonborrow=false
spring.datasource.testonreturn=false
# 打开pscache，并且指定每个连接上pscache的大小
spring.datasource.poolpreparedstatements=true
spring.datasource.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.datasource.filters=stat,wall,log4j
# 通过connectproperties属性来打开mergesql功能；慢sql记录
spring.datasource.connectionproperties=druid.stat.mergesql=true;druid.stat.slowsqlmillis=5000
# 合并多个druiddatasource的监控数据
#spring.datasource.useglobaldatasourcestat=true

spring.jpa.database=mysql
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.mysql5dialect
#懒加载配置
spring.jpa.properties.hibernate.enable_lazy_load_no_trans=true

3、目前spring boot中默认支持的连接池有dbcp,dbcp2, tomcat, hikari三种连接池。由于druid暂时不在spring bootz中的直接支持，故需要进行配置信息的定制

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;

@configuration
public class druidconfiguration {
  @value("${spring.datasource.url}")
  private string dburl;
  @value("${spring.datasource.username}")
  private string username;
  @value("${spring.datasource.password}")
  private string password;
  @value("${spring.datasource.driver-class-name}")
  private string driverclassname;
  @value("${spring.datasource.initialsize}")
  private int initialsize;
  @value("${spring.datasource.minidle}")
  private int minidle;
  @value("${spring.datasource.maxactive}")
  private int maxactive;
  @value("${spring.datasource.maxwait}")
  private int maxwait;
  @value("${spring.datasource.timebetweenevictionrunsmillis}")
  private int timebetweenevictionrunsmillis;
  @value("${spring.datasource.minevictableidletimemillis}")
  private int minevictableidletimemillis;
  @value("${spring.datasource.validationquery}")
  private string validationquery;
  @value("${spring.datasource.testwhileidle}")
  private boolean testwhileidle;
  @value("${spring.datasource.testonborrow}")
  private boolean testonborrow;
  @value("${spring.datasource.testonreturn}")
  private boolean testonreturn;
  @value("${spring.datasource.poolpreparedstatements}")
  private boolean poolpreparedstatements;
  @value("${spring.datasource.maxpoolpreparedstatementperconnectionsize}")
  private int maxpoolpreparedstatementperconnectionsize;
  @value("${spring.datasource.filters}")
  private string filters;
  @value("{spring.datasource.connectionproperties}")
  private string connectionproperties;

  @bean   //声明其为bean实例
  @primary //在同样的datasource中，首先使用被标注的datasource
  public datasource datasource(){
    druiddatasource datasource = new druiddatasource();
    datasource.seturl(this.dburl);
    datasource.setusername(username);
    datasource.setpassword(password);
    datasource.setdriverclassname(driverclassname);

    //configuration
    datasource.setinitialsize(initialsize);
    datasource.setminidle(minidle);
    datasource.setmaxactive(maxactive);
    datasource.setmaxwait(maxwait);
    datasource.settimebetweenevictionrunsmillis(timebetweenevictionrunsmillis);
    datasource.setminevictableidletimemillis(minevictableidletimemillis);
    datasource.setvalidationquery(validationquery);
    datasource.settestwhileidle(testwhileidle);
    datasource.settestonborrow(testonborrow);
    datasource.settestonreturn(testonreturn);
    datasource.setpoolpreparedstatements(poolpreparedstatements);
    datasource.setmaxpoolpreparedstatementperconnectionsize(maxpoolpreparedstatementperconnectionsize);
    try {
      datasource.setfilters(filters);
    } catch (sqlexception e) {
      system.err.println("druid configuration initialization filter: "+ e);
    }
    datasource.setconnectionproperties(connectionproperties);
    return datasource;
  }

  @bean
  public servletregistrationbean statviewservle(){
    servletregistrationbean servletregistrationbean = new servletregistrationbean(new statviewservlet(),"/druid/*");
    // ip白名单
    servletregistrationbean.addinitparameter("allow","192.168.1.218,127.0.0.1");
    // 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","druid");
    servletregistrationbean.addinitparameter("loginpassword","761341");
    //是否能够重置数据
    servletregistrationbean.addinitparameter("resetenable","false");
    return servletregistrationbean;
  }

  @bean
  public filterregistrationbean statfilter(){
    filterregistrationbean filterregistrationbean = new filterregistrationbean(new webstatfilter());
    //添加过滤规则
    filterregistrationbean.addurlpatterns("/*");
    //忽略过滤的格式
    filterregistrationbean.addinitparameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
    return filterregistrationbean;
  }
}

4、浏览器输入http://localhost:8081/druid/