SpringBoot详解如何进行整合Druid数据源_java

1.自定义方式

使用自定义方式整合Druid

1.添加依赖

在pom.xml添加相关依赖

  <!--数据库相关-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.6</version>
        </dependency>
    </dependencies>

2.编写配置

application.properties

server.port=8080
spring.datasource.url=jdbc:mysql://localhost:3306/db_springtest?useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

配置Druid的监控页功能：

Druid内置提供了一个StatViewServlet用于展示Druid的统计信息。官方文档 - 配置StatViewServlet

这个StatViewServlet的用途包括：

提供监控信息展示的html页面
提供监控信息的JSON API

Druid内置提供一个StatFilter，用于统计监控信息。官方文档 - 配置_StatFilter

WebStatFilter用于采集web-jdbc关联监控的数据，如SQL监控、URI监控。官方文档 - 配置WebStatFilter

Druid提供了WallFilter，它是基于SQL语义分析来实现防御SQL注入攻击的。官方文档 - 配置 wallfilter

DataSourceConfig

package com.limi.springboottest2.config;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
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 javax.sql.DataSource;
import java.sql.SQLException;
import java.util.Arrays;
@Configuration
public class DataSourceConfig {
    @Bean
    @ConfigurationProperties("spring.datasource")//复用配置文件的数据源配置, 这样就不用写代码一个一个set了
    public DataSource dataSource() throws SQLException {
        DruidDataSource druidDataSource = new DruidDataSource();
        //加入监控和防火墙功能功能
        druidDataSource.setFilters("stat,wall");
        return druidDataSource;
    }
    /**
     * 配置 druid的监控页功能
     * @return
     */
    @Bean
    public ServletRegistrationBean statViewServlet(){
        StatViewServlet statViewServlet = new StatViewServlet();
        ServletRegistrationBean<StatViewServlet> registrationBean =
                new ServletRegistrationBean<>(statViewServlet, "/druid/*");
        //监控页账号密码：
        registrationBean.addInitParameter("loginUsername","admin");
        registrationBean.addInitParameter("loginPassword","123456");
        return registrationBean;
    }
    /**
     * WebStatFilter 用于采集web-jdbc关联监控的数据。
     */
    @Bean
    public FilterRegistrationBean webStatFilter(){
        WebStatFilter webStatFilter = new WebStatFilter();
        FilterRegistrationBean<WebStatFilter> filterRegistrationBean = new FilterRegistrationBean<>(webStatFilter);
        filterRegistrationBean.setUrlPatterns(Arrays.asList("/*"));
        filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }
}

3.测试

HelloController

package com.limi.springboottest2.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class HelloController {
    @Autowired
    private JdbcTemplate jdbcTemplate;
    @ResponseBody
    @GetMapping("/sql")
    public String test1(){
        String sql = "select count(*) from t_user";
        Long i = jdbcTemplate.queryForObject(sql, Long.class);
        return i.toString();
    }
}

多次点击刷新进行访问

登录druid后台查看监控信息

账号admin, 密码123456

2.starter方式(推荐)

使用场景启动器整合druid, 效果和自定义方式一样, 但更加方便