從零搭建自己的SpringBoot後臺框架(二)

Mr_初晨發表於2019-03-03

Hello大家好，本章我們將預設資料庫連線池換成Druid連線池。有問題可以聯絡我mr_beany@163.com。另求各路大神指點，感謝

一：引入Druid依賴

開啟上篇文章→從頭開始搭建自己的springboot後臺框架（一）中提到的pom.xml

找到<dependencies></dependencies>標籤，在標籤中新增Druid依賴

<dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>druid</artifactId>
   <version>1.0.29</version>
</dependency>複製程式碼

剛新增時 <version>1.0.29</version> 顯示紅色

然後滑鼠右鍵選擇Maven→Reimport進行依賴下載

下載成功後 <version>1.0.29</version> 顯示黑色

二：配置資料來源連線池資訊

在application.properties檔案中新增如下配置

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#連線池配置
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
#連線等待超時時間
spring.datasource.maxWait=60000
#配置隔多久進行一次檢測(檢測可以關閉的空閒連線)
spring.datasource.timeBetweenEvictionRunsMillis=60000
#配置連線在池中的最小生存時間
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 開啟PSCache，並且指定每個連線上PSCache的大小
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
# 配置監控統計攔截的filters，去掉後監控介面sql無法統計，`wall`用於防火牆
spring.datasource.filters=stat,wall,slf4j
# 通過connectProperties屬性來開啟mergeSql功能；慢SQL記錄
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000複製程式碼

三：新增配置檔案

在core→configurer下建立DruidDataSourceConfigurer.java 和DruidMonitorConfigurer.java

內容如下:

DruidDataSourceConfigurer

package com.example.demo.core.configurer;

import com.alibaba.druid.pool.DruidDataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;
import java.sql.SQLException;

/**
 * @author 張瑤
 * @Description:
 * @time 2018/4/18 15:16
 */
@Configuration
public class DruidDataSourceConfigurer {

    private Logger logger = LoggerFactory.getLogger(DruidDataSourceConfigurer.class);

    @Value("${spring.datasource.url}")
    private String dbUrl;

    @Value("${spring.datasource.username}")
    private String username;

    @Value("${spring.datasource.password}")
    private String password;

    @Value("${spring.datasource.driverClassName}")
    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
    public DataSource getDataSource() {
        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) {
            logger.error("druid configuration initialization filter", e);
        }
        datasource.setConnectionProperties(connectionProperties);

        return datasource;
    }
}
複製程式碼

DruidMonitorConfigurer

package com.example.demo.core.configurer;

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 com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;

/**
 * @author 張瑤
 * @Description:Druid監控配置
 * @time 2018/4/18 15:30
 */
@Configuration
public class DruidMonitorConfigurer {

    /**
     * 註冊ServletRegistrationBean
     * @return
     */
    @Bean
    public ServletRegistrationBean registrationBean() {
        ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        /** 初始化引數配置，initParams**/
        //白名單
        bean.addInitParameter("allow", "127.0.0.1");//多個ip逗號隔開
        //IP黑名單 (存在共同時，deny優先於allow) : 如果滿足deny的話提示:Sorry, you are not permitted to view this page.
        //bean.addInitParameter("deny", "192.168.1.110");
        //登入檢視資訊的賬號密碼.
        bean.addInitParameter("loginUsername", "admin");
        bean.addInitParameter("loginPassword", "123456");
        //是否能夠重置資料.
        bean.addInitParameter("resetEnable", "false");
        return bean;
    }

    /**
     * 註冊FilterRegistrationBean
     * @return
     */
    @Bean
    public FilterRegistrationBean druidStatFilter() {
        FilterRegistrationBean bean = new FilterRegistrationBean(new WebStatFilter());
        //新增過濾規則.
        bean.addUrlPatterns("/*");
        //新增不需要忽略的格式資訊.
        bean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return bean;
    }

}複製程式碼