SpringBoot项目配置c3p0数据源

一、导入依赖

<dependency>
       <groupId>com.mchange</groupId>
       <artifactId>c3p0</artifactId>
       <version>0.9.5.5</version>
 </dependency>
 <dependency>
       <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>2.1.3</version>
</dependency>

二、在application.yaml配置数据源信息

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/hrsystem?serverTimezone=UTC
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver
    type: com.mchange.v2.c3p0.ComboPooledDataSource
    acquireIncrement: 11
    acquireRetryAttempts: 7

三、创建DataSourceConfig配置dataSource

package com.zzx.config;
import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import javax.sql.DataSource;

@Configuration
public class DataSourceConfig {

    @Bean
    @Primary//自动装配时当出现多个Bean候选者时，被注解为@Primary的Bean将作为首选者，否则将抛出异常
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource dataSource(){
        return DataSourceBuilder.create().type(ComboPooledDataSource.class).build();
    }
}

四、启动类添加注解

@MapperScan("com.zzx.dao")//扫描mapper接口与配置文件,如果配置文件和接口不在同一个包下,要在配置文件中配置xml路径
@SpringBootApplication
public class HrsystemApplication {
    public static void main(String[] args) {
        SpringApplication.run(HrsystemApplication.class, args);
    }

}

五、添加MyBatis配置

mybatis:
  mapper-locations: classpath:mapper/*Mapper.xml
  type-aliases-package: com.zzx.dao
    #打印mybatis日志
  configuration:
    log-impl: org.apache.ibatis.logging.log4j2.Log4j2Impl

 

PS:遇到报错：java.io.FileNotFoundException: C:\Users\ABC\.m2\repository\com\mchange\c3p0\0.9.5.2\mchange-commons-java-0.2.11.jar (The system cannot find the file specified)

在C:\Users\ABC\.m2\repository\com\mchange\c3p0\0.9.5.2\放置mchange-commons-java-0.2.11.jar即可