Groovy读取yaml和properties文件

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人不如故 10月 10, 2017
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Java 可以使用 PropertiesConfiguration 来读取 properties 属性文件，Spring 4.3 后还支持了 Yaml 格式的属性文件

  • PropertiesConfiguration: 读取时可以自动进行类型转换，可以给定默认值
  • Yaml 格式的属性文件: 可以使用树形结构，方便分组，比 .properties 属性文件更灵活，但是以普通的 java.util.Properties 来读取

Gradle 依赖

compile 'org.springframework:spring-context:4.3.0.RELEASE'

compile 'org.yaml:snakeyaml:1.17'

compile 'commons-configuration:commons-configuration:1.10'

testCompile 'org.springframework:spring-test:4.3.0.RELEASE'

testCompile 'junit:junit:4.12'

属性文件

config.properties 

username=Dr. Alice 

age=22 

config.yml

#mysql 

mysql: 

    jdbc: 

        url: jdbc:mysql://localhost:3306 

        dirverClass: com.mysql.jdbc.Driver 

        username: root 

        password: root 

        username: Ritchie Yu

Spring Bean 配置文件

spring-beans-config.xml 

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans.xsd">

<bean id="yamlProperties" class="org.springframework.beans.factory.config.YamlPropertiesFactoryBean">

<property name="resources">

<list>

<value>classpath:config.yml</value>

</list>

</property>

</bean>

<bean id="propertiesConfig" class="org.apache.commons.configuration.PropertiesConfiguration">

<constructor-arg value="config.properties"/>

</bean>

</beans>

测试案例

import org.apache.commons.configuration.PropertiesConfiguration; 

import org.junit.runner.RunWith; 

import org.junit.Test; 

import org.springframework.test.context.ContextConfiguration; 

import org.springframework.test.context.junit4.SpringRunner; 

import javax.annotation.Resource; 

import java.util.Properties; 

@RunWith(SpringRunner.class) 

@ContextConfiguration({"classpath:spring-beans-config.xml"}) 

public class TestYamlPropertiesAndPropertiesConfig { 

@Resource(name = "yamlProperties") 

private Properties yamlProperties; 

@Resource(name = "propertiesConfig") 

private PropertiesConfiguration propertiesConfig; 

@Test

public void testYamlProperties() { 

System.out.println(yamlProperties.getProperty("mysql.jdbc.url")); 

System.out.println(yamlProperties.getProperty("username")); 

} 

@Test

public void testPropertiesConfig() { 

System.out.println(propertiesConfig.getString("username")); 

System.out.println(propertiesConfig.getInteger("age", 0)); 

} 

}

输出: 

Dr. Alice 

22 

jdbc:mysql://localhost:3306 

Ritchie Yu
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