详解SpringBoot注解读取配置文件的方式

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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
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CodeAE代码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CodeAE代码之家！
原文链接：https://juejin.cn/post/6927101340178972686