SpringBoot整合Druid数据源的方法实现

2024-04-02 19:55

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1、在创建SpringBoot项目的时候，在pom.xml maven中添加依赖：

            <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
 
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
             <version>5.1.47</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
          
        </dependency>

注意：druid 依赖 log4j 的日志jar包，但是 SpringBoot 默认使用的是 slf4j+logback，所以导入log4j的jar包即可。

2、在 application.yml（或aproperties）中添加相应的配置：

# 
server:
  port: 80
 # 数据库连接信息
spring:
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://localhost:3306/springboot?useUnicode=true&characterEncoding=utf8&useSSL=true&serverTimezone=GMT
    driver-class-name: com.mysql.cj.jdbc.Driver # com.mysql.jdbc.Driver
#   使用 Druid 数据源
    type: com.alibaba.druid.pool.DruidDataSource

3、 log4j.properties 配置文件：

log4j.rootLogger = debug,stdout, D
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.Threshold = INFO
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p %m%n
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = ./log4j.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern=%d %p %m%n

4、在运行测试方法，查看数据源

public class SpringbootdemoApplicationTests {
 
     @Autowired
    private JdbcTemplate jdbcTemplate;
    @Autowired
    private DataSource dataSource;
     
    @Test
    public void contextLoads() throws SQLException {
        System.out.println("dataSource==" + dataSource.getClass());
        Connection con = dataSource.getConnection();
        System.out.println("con==" + con);
         List<Map<String, Object>> maps = jdbcTemplate.queryForList("select * from user");
        System.out.println(maps);
    }
 
}