學習IDEA配置 Druid 遇到的“坑”-----記錄1

POM.XML文件配置如下

 

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.gaole</groupId>
    <artifactId>study</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>study</name>
    <description>Study Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

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

        <!-- 引入 Druid 數據源依賴：https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.9</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>6.0.6</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

 

application.yml  配置如下

spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3306/wxmp?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=false
      username: root
      password: 111111
      initialSize: 5
      minIdle: 5
      maxActive: 20
      # 配置獲取連接等待超時的時間
      maxWait: 60000
      # 配置間隔多久才進行一次檢測，檢測需要關閉的空閑連接，單位是毫秒
      timeBetweenEvictionRunsMillis: 60000
      # 配置一個連接在池中最小生存的時間，單位是毫秒
      minEvictableIdleTimeMillis: 300000
      validationQuery: SELECT 1 FROM DUAL
      testWhileIdle: true
      testOnBorrow: false
      testOnReturn: false
      # 打開PSCache，並且指定每個連接上PSCache的大小
      poolPreparedStatements: true
      maxPoolPreparedStatementPerConnectionSize: 20
      # 配置監控統計攔截的filters，去掉后監控界面sql無法統計，'wall'用於防火牆
      #filters: stat,wall,log4j
      # 通過connectProperties屬性來打開mergeSql功能；慢SQL記錄
      connection-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
      # 合並多個DruidDataSource的監控數據
      useGlobalDataSourceStat: true
  #      web-stat-filter:
  #          enabled: false
mybatis:
  # 指定全局配置文件位置
  config-location: classpath:mybatis/mybatis-config.xml
  # 指定sql映射文件位置
  mapper-locations: classpath:mybatis/mapper/*.xml

#    schema:
#      - classpath:sql/department.sql
#      - classpath:sql/employee.sql
server:
  port: 8082

 

IDEA創建項目時，啥也沒寫，就一個主程序

package com.gaole.study;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class StudyApplication {

    public static void main(String[] args) {

        SpringApplication.run(StudyApplication.class, args);
    }


}

編譯通過，但是啟動報錯如下

***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class

 

配置了半天還是搞不定，后來 

https://blog.csdn.net/qq_40223688/article/details/88191732

 

主類中加入

@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})

並重新導入需要的類，重新編譯，啟動，竟然好了，還是對SpringBoot的原理弄不清；

先記錄下來，以后看；