问题：在Spring Boot里面，怎么获取定义在application.properties文件里的值、

我想访问application.properties里面提供的值，像这样：

logging.level.org.springframework.web: DEBUG
logging.level.org.hibernate: ERROR
logging.file=${HOME}/application.loguserBucket.path=${HOME}/bucket

我想要在spring boot的主程序里访问userBucket.path

回答一

Another way is injecting org.springframework.core.env.Environment to your bean.
另一种方法就把org.springframework.core.env.Environment注入到你的bean里面

@Autowired
private Environment env;
....public void method() {.....  String path = env.getProperty("userBucket.path");.....
}

回答二

@ConfigurationProperties可以用于将.properties( .yml也行)的值映射到一个POJO

Consider the following Example file.
看一下下面的实例文件

.properties

cust.data.employee.name=Sachin
cust.data.employee.dept=Cricket

Employee.java

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;@ConfigurationProperties(prefix = "cust.data.employee")
@Configuration("employeeProperties")
public class Employee {private String name;private String dept;//Getters and Setters go here
}
Now the properties value can be accessed by autowiring employeeProperties as follows.

现在properties里面的值可以通过像下面那样@Autowired一个employeeProperties，从而被访问到。

@Autowired
private Employee employeeProperties;public void method() {String employeeName = employeeProperties.getName();String employeeDept = employeeProperties.getDept();}

回答三

你也可以这样做

@Component
@PropertySource("classpath:application.properties")
public class ConfigProperties {@Autowiredprivate Environment env;public String getConfigValue(String configKey){return env.getProperty(configKey);}
}

无论你想怎么样读取application.properties，只要传递个key给getConfigValue方法就完事了

@Autowired
ConfigProperties configProp;// Read server.port from app.prop
String portNumber = configProp.getConfigValue("server.port"); 

回答四

follow these steps. 1:- create your configuration class like below you can see
按这些步骤干：1. 创建你的 configuration类，像你下面看到的那样

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.beans.factory.annotation.Value;@Configuration
public class YourConfiguration{// passing the key which you set in application.properties@Value("${userBucket.path}")private String userBucket;// getting the value from that key which you set in application.properties@Beanpublic String getUserBucketPath() {return userBucket;}
}

2. 当你有了一个configuration 类以后，就可以从configuration，注入你需要的变量了

@Component
public class YourService {@Autowiredprivate String getUserBucketPath;// now you have a value in getUserBucketPath varibale automatically.
}

文章翻译自Stack Overflow：https://stackoverflow.com/questions/30528255/how-to-access-a-value-defined-in-the-application-properties-file-in-spring-boot