Spring读取配置文件属性实现方法

@Configuration
@PropertySource(value = {"classpath:zszxz.properties"},encoding = "UTF-8")
@Component
public class EnvironmentProperty {
  // 注入环境
  @Autowired
  private Environment environment;


  public void outputProperty(){
    System.out.println(environment.getProperty("zszxz.name"));
  }
}

@RunWith(SpringJUnit4ClassRunner.class)//创建spring应用上下文
@ContextConfiguration(classes= EnvironmentProperty.class)//加载配置类
public class PropertyTest {
  @Autowired
  EnvironmentProperty environmentProperty;

  @Test
  public void test(){
    // zszxz
    environmentProperty.outputProperty();
  }
}

@Configuration
@PropertySource(value = {"classpath:zszxz.properties"},encoding = "UTF-8")
@Component
public class EnvironmentProperty {

  @Value("${zszxz.point}")
  private String point;

  public void outputPoint(){
    System.out.println(point);
  }

}

@RunWith(SpringJUnit4ClassRunner.class)//创建spring应用上下文
@ContextConfiguration(classes= EnvironmentProperty.class)//加载配置类
public class PropertyTest {
  @Autowired
  EnvironmentProperty environmentProperty;
  @Test
  public void testPoint(){
    // share
    environmentProperty.outputPoint();
  }
}

  @Value("#{environmentProperty}")
  private EnvironmentProperty getBean;

  @Test
  public void testBean(){
    // com.zszxz.property.EnvironmentProperty$$EnhancerBySpringCGLIB$$8e54e11f@1d9b7cce
    System.out.println(getBean);
  }

  @Value("#{environmentProperty.getStr()}")
  private String getMethod;

  @Test
  public void testMethod(){
    // 知识追寻者
    System.out.println(getMethod);
  }

  @Value("#{environmentProperty.username}")
  private String getField;

  @Test
  public void testField(){
    // 知识追寻者
    System.out.println(getField);
  }

  @Value("#{T(java.lang.Math).random()}")
  private double number;

  @Test
  public void testStatic() {
    // 0.9205474938572363
    System.out.println(number);
  }

  @Value("#{environmentProperty.username?.toString()}")
  private String notNull;

  @Test
  public void testNotNUll() {
    // 知识追寻者
    System.out.println(notNull);
  }