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服务器之家 - 编程语言 - Java教程 - 详解SpringBoot注解读取配置文件的方式

详解SpringBoot注解读取配置文件的方式

2021-08-08 11:23倾如故 Java教程

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

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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

到此这篇关于详解SpringBoot注解读取配置文件的方式的文章就介绍到这了,更多相关SpringBoot注解读取配置文件内容请搜索服务器之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持服务器之家!

原文链接:https://juejin.cn/post/6927101340178972686

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