Spring Boot集成hikari快速入门demo

1.hikari介绍

Hikari是快速，简单，可靠和生产就绪的JDBC连接池。在Spring Boot 2.0版本中，默认数据库池技术已从Tomcat Pool切换到Hikari。这是因为Hikari提供了卓越的性能。现在自Spring Boot 2.0发布以来，spring-boot-starter-jdbc和spring-boot-starter-data-jpa默认解析Hikari依赖， spring.datasource.type属性将HikariDataSource作为默认值。

2.mysql环境搭建

参考代码仓库里面的mysql模块，这里只贴出docker-compose.yml

yaml 复制代码

version: '3'
services:
  mysql:
    image: registry.cn-hangzhou.aliyuncs.com/zhengqing/mysql:5.7
    container_name: mysql_3306
    restart: unless-stopped                                   
    volumes:
      - "./mysql/my.cnf:/etc/mysql/my.cnf"
      - "./mysql/init-file.sql:/etc/mysql/init-file.sql"
      - "./mysql/data:/var/lib/mysql"
#      - "./mysql/conf.d:/etc/mysql/conf.d"
      - "./mysql/log/mysql/error.log:/var/log/mysql/error.log"
      - "./mysql/docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d" # init sql script directory -- tips: it can be excute  when `/var/lib/mysql` is empty
    environment:                        # set environment,equals docker run -e
      TZ: Asia/Shanghai
      LANG: en_US.UTF-8
      MYSQL_ROOT_PASSWORD: root         # set root password
      MYSQL_DATABASE: demo              # init database name
    ports:                              # port mappping
      - "3306:3306"

运行

css 复制代码

docker-compose -f docker-compose.yml -p mysql5.7 up -d

3.代码工程

实验目标：使用hikari连接mysql数据库

pom.xml

xml 复制代码

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>springboot-demo</artifactId>
        <groupId>com.et</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>hikari</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-autoconfigure</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!--jpa-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

    </dependencies>
</project>

application.properties

ini 复制代码

server.port=8088

spring.datasource.url=jdbc:mysql://localhost:3306/demo
spring.datasource.username=root
spring.datasource.password=root

#Spring Boot 2.0 includes HikariDataSource by default
#spring.datasource.type = com.zaxxer.hikari.HikariDataSource

spring.datasource.hikari.connection-timeout=20000
spring.datasource.hikari.minimum-idle=5
spring.datasource.hikari.maximum-pool-size=12
spring.datasource.hikari.idle-timeout=300000
spring.datasource.hikari.max-lifetime=1200000
spring.datasource.hikari.auto-commit=true

spring.jpa.hibernate.naming.physical-strategy=org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy
#use mysql database
spring.jpa.database=mysql
# show sql
spring.jpa.show-sql=true

DemoApplication.java

java 复制代码

package com.et.hikari;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import javax.sql.DataSource;

@SpringBootApplication
public class DemoApplication implements CommandLineRunner {
   @Autowired
   DataSource dataSource;

   public static void main(String[] args) {
      SpringApplication.run(DemoApplication.class, args);
   }
   @Override
   public void run(String... args) throws Exception {
      System.out.println("DataSource = " + dataSource);
   }
}

controller

typescript 复制代码

package com.et.hikari.controller;

import com.et.hikari.entity.User;
import com.et.hikari.repository.UserRepository;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map;

@RestController
public class HelloWorldController {
    @Autowired
    private UserRepository userRepository;
    @RequestMapping("/hello")
    @ResponseBody
    public Map<String, Object> showHelloWorld(){
        Map<String, Object> map = new HashMap<>();
        map.put("msg", "HelloWorld");
        return map;
    }


    @RequestMapping("/add")
    public User add(String name){
        User user = new User();
        user.setName(name);
        return userRepository.save(user);
    }

    @RequestMapping("/list")
    public Iterable<User> list(){
        Iterable<User> all = userRepository.findAll();
        return all;
    }
}

repository

kotlin 复制代码

package com.et.hikari.repository;


import com.et.hikari.entity.User;
import org.springframework.data.repository.CrudRepository;

public  interface UserRepository extends CrudRepository<User, String> {

}

entity