springboot如何获取yml里面的属性值
如何获取yml里面的属性值
开发环境
- idea
- jdk1.8
项目结构
pom依赖
<?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>2.1.8.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.springboot</groupId> <artifactId>springboot_demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springboot_demo</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <!--导入配置文件处理器,配置文件绑定数据会有数据--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
springboot启动类
package com.springboot.springboot_demo; import org.springframework.beans.factory.config.YamlPropertiesFactoryBean; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.Bean; import org.springframework.context.support.PropertySourcesPlaceholderConfigurer; import org.springframework.core.io.ClassPathResource; @SpringBootApplication public class SpringbootDemoApplication { public static void main(String[] args) { SpringApplication.run(SpringbootDemoApplication.class, args); } /** * 设置自定义yml位置 * * @return */ @Bean public static PropertySourcesPlaceholderConfigurer properties() { PropertySourcesPlaceholderConfigurer pspc = new PropertySourcesPlaceholderConfigurer(); YamlPropertiesFactoryBean yaml = new YamlPropertiesFactoryBean(); yaml.setResources( new ClassPathResource[] { /** 请求url地址 */ new ClassPathResource("config/person.yml") }); pspc.setProperties(yaml.getObject()); return pspc; } }
person.yml
person: lastName: zhangsan age: 18 boss: false birth: 2017/12/12 maps: {k1: v1,k2: v2} lists: - lisi - zhaoliu dog: name: 小狗 age: 2
person.java
package com.springboot.springboot_demo.pojo; import lombok.Data; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.stereotype.Component; import java.util.Date; import java.util.List; import java.util.Map; /** * 将配置文件中配置的每一个属性的值映射到person * @ConfigurationProperties 告诉springboot 将本类中的值与配置文件中的值绑定 * prefix = "person" 配置文件下的那个属性下的 * 只有这个组件是容器中的组件才能使用@Component */ @Data @Component @ConfigurationProperties(prefix = "person") public class Person { private String lastName; private Integer age; private Boolean boss; private Date birth; private Map<String,Object> maps; private List<Object> lists; private Dog dog; }
Dog.java
package com.springboot.springboot_demo.pojo; import lombok.Data; @Data public class Dog { private String name; private String age; }
SpringbootDemoApplicationTests
package com.springboot.springboot_demo; import com.springboot.springboot_demo.pojo.Person; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; /** * springboot单元测试 */ @RunWith(SpringRunner.class) @SpringBootTest public class SpringbootDemoApplicationTests { @Autowired private Person person; @Value("${person.lastName}") private String username; @Test public void contextLoads() { System.out.println(person); } @Test public void personCopy() { System.out.println(username); } }
控制台输出
Person(lastName=zhangsan, age=18, boss=false, birth=Tue Dec 12 00:00:00 CST 2017, maps={k1=v1, k2=v2}, lists=[lisi, zhaoliu], dog=Dog(name=小狗, age=2))
zhangsan
获取.yml中自定义参数
需求:根据不同环境获取到不同的参数,放在.yml中方便修改!
在开发环境中,回调的url地址
在测试环境中,回调的url地址
在生产环境中,回调的url地址
我是通过2种方式来实现的
通过@Value获取
代码如下
package com.heque.service.pay; import org.springframework.beans.factory.annotation.Value; public abstract class ObtainNotifyUrl { @Value("${weixinAndAli.wechatNotifyUrl}") private String wechatNotifyUrl; @Value("${weixinAndAli.aliNotifyUrl}") private String aliNotifyUrl; public String getWechatNotifyUrl() { return wechatNotifyUrl; } public void setWechatNotifyUrl(String wechatNotifyUrl) { this.wechatNotifyUrl = wechatNotifyUrl; } public String getAliNotifyUrl() { return aliNotifyUrl; } public void setAliNotifyUrl(String aliNotifyUrl) { this.aliNotifyUrl = aliNotifyUrl; } }
package com.heque.service.pay; import org.springframework.stereotype.Component; import lombok.Data; import lombok.EqualsAndHashCode; @Data @EqualsAndHashCode(callSuper = false) @Component public class Test extends ObtainNotifyUrl{ }
通过springframework自动包可以完成此功能,需要注意Test继承对象需要加入@component,把对象交给springContainer去管理,我们需要的时候只需注入资源就好了。
@Autowired private Test test; test.getAliNotifyUrl();/test.getWechatNotifyUrl();
通过@ConfigurationProperties(prefix = "weixinAndAli")注解
代码如下
package com.heque.service.pay; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.stereotype.Component; /** * @author: TimBrian * @date: Sep 10, 2018 9:13:40 AM */ @Component @ConfigurationProperties(prefix = "weixinAndAli") public class ConfigUtils { private String wechatNotifyUrl; private String aliNotifyUrl; public String getWechatNotifyUrl() { return this.wechatNotifyUrl; } public void setWechatNotifyUrl(String wechatNotifyUrl) { this.wechatNotifyUrl = wechatNotifyUrl; } public String getAliNotifyUrl() { return aliNotifyUrl; } public void setAliNotifyUrl(String aliNotifyUrl) { this.aliNotifyUrl = aliNotifyUrl; } }
调用和方法一一样的
以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。
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