详解SpringBoot注解读取配置文件的方式
更新时间:2021年02月10日 09:35:06 作者:倾如故
这篇文章主要介绍了详解SpringBoot注解读取配置文件的方式,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
一、@Value读取application.properties配置文件中的值
application.properties配置文件
fileName=configName
PropertiesConfig类文件
import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Component; @Component public class PropertiesConfig { //通过@Value注解读取fileName的值 @Value("${fileName}") private String fileName; public String getFileName() { return fileName; } public void setFileName(String fileName) { this.fileName = fileName; } }
测试
import com.model.PropertiesConfig; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; @RunWith(SpringRunner.class) @SpringBootTest public class PropertiesConfigTest { @Autowired private PropertiesConfig propertiesConfig; @Test public void test(){ System.out.println(propertiesConfig.getFileName());//结果输出:configName assert "configName".equals(propertiesConfig.getFileName()); } }
二、@ConfigurationProperties读取多个application.properties配置文件中的值
application.properties文件
database.username=root database.password=root
DatabaseConfig类文件
import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.stereotype.Component; @Component @ConfigurationProperties("database") public class DatabaseConfig { private String userName; private String passWord; 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; } }
测试
import com.model.DatabaseConfig; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; @RunWith(SpringRunner.class) @SpringBootTest public class DatabaseConfigTest { @Autowired private DatabaseConfig databaseConfig; @Test public void test(){ System.out.println("username = " + databaseConfig.getUserName() +", password = "+databaseConfig.getPassWord());//结果输出:username = root, password = root assert "root".equals(databaseConfig.getUserName()); assert "root".equals(databaseConfig.getPassWord()); } }
三、@PropertySource读取任意配置文件
新建property-source.properties配置文件
fileName=configName database.username=root database.password=root
PropertySourceConfig类文件
import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component; @Component @PropertySource(value = {"classpath:property-source.properties"}) @ConfigurationProperties("database") public class PropertySourceConfig { @Value("${fileName}") private String fileName; private String userName; private String passWord; public String getFileName() { return fileName; } public void setFileName(String fileName) { this.fileName = fileName; } 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; } }
测试
import com.model.PropertySourceConfig; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; @RunWith(SpringRunner.class) @SpringBootTest public class PropertySourceConfigTest { @Autowired private PropertySourceConfig propertySourceConfig; @Test public void test(){ assert "configName".equals(propertySourceConfig.getFileName()); System.out.println("fileName = " + propertySourceConfig.getFileName());//结果输出:configName assert "root".equals(propertySourceConfig.getUserName()); System.out.println(propertySourceConfig.getUserName());//结果输出:root assert "root".equals(propertySourceConfig.getPassWord()); System.out.println(propertySourceConfig.getPassWord());//结果输出:root } }
完整代码链接:read-config-file项目地址
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