标签：word image sources 工厂 tostring inf tco int hash
1.指定配置文件，创建jdbc.properties
jdbc.driver = com.mysql.jdbc.driver
jdbc.url = jdbc:mysql://localhost:3306/demo
jdbc.username = root
jdbc.password = root
2.创建一个配置类，配置类中完成属性的注入
//完成自动配置的三种形式，xml，注解，配置
@Configuration
//将配置文件的值读取到spring value值是文件路径
@PropertySource(value = "jdbc.properties")
public class DruidConf {
//从spring环境中读取每一个键值对，并且赋值于成员变量，使用value取值,取值方式spel，spring的el表达式
@Value("${jdbc.driver}")
String driver;
@Value("${jdbc.url}")
String url;
@Value("${jdbc.username}")
String username;
@Value("${jdbc.password}")
String password;
//@Bean 将结果交给工厂管理
@Bean
public DruidDataSource getDruidDataSources(){
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName(driver);
dataSource.setUrl(url);
dataSource.setUsername(username);
dataSource.setPassword(password);
return dataSource;
}
}
3.处理器中的使用
@RestController
public class TestController {
@Autowired
DruidDataSource druidDataSource;
@RequestMapping("/test")
public void test(){
System.out.println("==============");
}
}
SpringBoot属性的注入
1.yml文件的书写
jdbc:
driver: com.mysql.jdbc.driver
url: jdbc:mysql://localhost:3306/demo
username: root
password: root
2.属性配置类
package com.nylg.conf; import org.springframework.boot.context.properties.ConfigurationProperties; import java.util.Objects;
//属性配置类，prefix前置配置
@ConfigurationProperties(prefix = "jdbc") public class DruidConfSpringBoot { String driver; String url; String username; String password; public String getDriver() { return driver; } public void setDriver(String driver) { this.driver = driver; } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public DruidConfSpringBoot() { } public DruidConfSpringBoot(String driver, String url, String username, String password) { this.driver = driver; this.url = url; this.username = username; this.password = password; } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; DruidConfSpringBoot that = (DruidConfSpringBoot) o; return Objects.equals(driver, that.driver) && Objects.equals(url, that.url) && Objects.equals(username, that.username) && Objects.equals(password, that.password); } @Override public int hashCode() { return Objects.hash(driver, url, username, password); } @Override public String toString() { return "DruidConfSpringBoot{" + "driver=‘" + driver + ‘\‘‘ + ", url=‘" + url + ‘\‘‘ + ", username=‘" + username + ‘\‘‘ + ", password=‘" + password + ‘\‘‘ + ‘}‘; } }
3.引入jar，重启项目
<!-- 配置文件提示-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
4.核心配置类
@Configuration//引入哪个属性配置类 @EnableConfigurationProperties(DruidConfSpringBoot.class) public class DruidConf { @Autowired DruidConfSpringBoot druidConfSpringBoot; //@Bean 将结果交给工厂管理 @Bean public DruidDataSource getDruidDataSources(){ DruidDataSource dataSource = new DruidDataSource();
//通过对象获取属性 dataSource.setDriverClassName(druidConfSpringBoot.getDriver()); dataSource.setUrl(druidConfSpringBoot.getUrl()); dataSource.setUsername(druidConfSpringBoot.getUsername()); dataSource.setPassword(druidConfSpringBoot.getPassword()); return dataSource; } }
属性配置过程
标签：word image sources 工厂 tostring inf tco int hash
原文地址：https://www.cnblogs.com/ghwq/p/12635824.html
