Examples of org.springframework.core.env.StandardEnvironment

org.springframework.core.env.StandardEnvironment
{@link Environment} implementation suitable for use in 'standard' (i.e. non-web)applications.
In addition to the usual functions of a {@link ConfigurableEnvironment} such asproperty resolution and profile-related operations, this implementation configures two default property sources, to be searched in the following order:
- {@linkplain AbstractEnvironment#getSystemProperties() system properties}
- {@linkplain AbstractEnvironment#getSystemEnvironment() system environment variables}
That is, if the key "xyz" is present both in the JVM system properties as well as in the set of environment variables for the current process, the value of key "xyz" from system properties will return from a call to {@code environment.getProperty("xyz")}. This ordering is chosen by default because system properties are per-JVM, while environment variables may be the same across many JVMs on a given system. Giving system properties precedence allows for overriding of environment variables on a per-JVM basis.
These default property sources may be removed, reordered, or replaced; and additional property sources may be added using the {@link MutablePropertySources}instance available from {@link #getPropertySources()}. See {@link ConfigurableEnvironment} Javadoc for usage examples.
See {@link SystemEnvironmentPropertySource} Javadoc for details on special handlingof property names in shell environments (e.g. Bash) that disallow period characters in variable names. @author Chris Beams @since 3.1 @see ConfigurableEnvironment @see SystemEnvironmentPropertySource @see org.springframework.web.context.support.StandardServletEnvironment

   * @deprecated since Spring 3.1 in favor of
   * {@link #BeanDefinitionParserDelegate(XmlReaderContext, Environment)}
   */
  @Deprecated
  public BeanDefinitionParserDelegate(XmlReaderContext readerContext) {
    this(readerContext, new StandardEnvironment());
  }

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  private static Environment getOrCreateEnvironment(BeanDefinitionRegistry registry) {
    Assert.notNull(registry, "BeanDefinitionRegistry must not be null");
    if (registry instanceof EnvironmentCapable) {
      return ((EnvironmentCapable) registry).getEnvironment();
    }
    return new StandardEnvironment();
  }

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  private static Environment getOrCreateEnvironment(BeanDefinitionRegistry registry) {
    Assert.notNull(registry, "BeanDefinitionRegistry must not be null");
    if (registry instanceof EnvironmentCapable) {
      return ((EnvironmentCapable) registry).getEnvironment();
    }
    return new StandardEnvironment();
  }

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   * {@link Service @Service}, and {@link Controller @Controller}
   * stereotype annotations
   * @see #registerDefaultFilters()
   */
  public ClassPathScanningCandidateComponentProvider(boolean useDefaultFilters) {
    this(useDefaultFilters, new StandardEnvironment());
  }

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   * Create and return a new {@link StandardEnvironment}.
   * <p>Subclasses may override this method in order to supply
   * a custom {@link ConfigurableEnvironment} implementation.
   */
  protected ConfigurableEnvironment createEnvironment() {
    return new StandardEnvironment();
  }

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public class EnvironmentTest {


    @Test
    public void test() {
        //会自动注册 System.getProperties() 和 System.getenv()
        Environment environment = new StandardEnvironment();
        System.out.println(environment.getProperty("file.encoding"));
        System.out.println(environment.getProperty("data"));




    }

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  @Test
  public void configuresRepositoriesCorrectly() {


    JpaRepositoriesRegistrar registrar = new JpaRepositoriesRegistrar();
    registrar.setResourceLoader(new DefaultResourceLoader());
    registrar.setEnvironment(new StandardEnvironment());
    registrar.registerBeanDefinitions(metadata, registry);


    Iterable<String> names = Arrays.asList(registry.getBeanDefinitionNames());
    assertThat(names, hasItems("userRepository", "auditableUserRepository", "roleRepository"));
  }

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  public void test() {
    //ConfigurableApplicationContext parent = new GenericApplicationContext();
//    parent.refresh();


    ConfigurableApplicationContext child = new ClassPathXmlApplicationContext();
    child.setEnvironment(new StandardEnvironment());
    child.refresh();


    child.close();
//    parent.close();

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    EmbeddedDatabaseFactory factory = new EmbeddedDatabaseFactory();
    factory.setDatabaseType(EmbeddedDatabaseType.H2);
    EmbeddedDatabase db = factory.getDatabase();
    System.setProperty("security.encryptPassword", "foo");
    System.setProperty("security.encryptSalt", new String(Hex.encode(KeyGenerators.secureRandom().generateKey())));
    DatabaseUpgrader installer = new DatabaseUpgrader(db, new StandardEnvironment(), Encryptors.noOpText());
    installer.run();
    installer.run();
    DatabaseUpgrader installer2 = new DatabaseUpgrader(db, new StandardEnvironment(), Encryptors.noOpText());
    installer2.run();
  }

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    assertThat(foo, instanceOf(String.class));
  }


  @Test
  public void getBean_withActiveProfile() {
    ConfigurableEnvironment env = new StandardEnvironment();
    env.setActiveProfiles("dev");


    DefaultListableBeanFactory bf = new DefaultListableBeanFactory();
    XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(bf);
    reader.setEnvironment(env);
    reader.loadBeanDefinitions(XML);

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