一、@Value读取application.properties配置文件中的值
application.properties配置文件
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fileName=configName |
PropertiesConfig类文件
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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
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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
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database.username=root database.password=root |
DatabaseConfig类文件
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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
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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
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fileName=configName database.username=root database.password=root |
PropertySourceConfig类文件
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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
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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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原文链接:https://juejin.cn/post/6927101340178972686