SpringBoot的@PropertySource注解只支持加载 properties结尾的文件。当使用@ConfigurationProperties
注解配合@EnableConfigurationProperties注解将配置转换为JavaBean时,可能需要配合@PropertySource
注解加载指定的配置文件。所以为了支持以yml或者yaml文件,我自定义了注解@YamlPropertySource。
声明注解@YamlPropertySource
import org.springframework.context.annotation.PropertySource;import org.springframework.core.io.support.PropertySourceFactory;import java.lang.annotation.*;/** * yaml property source and extension {@link PropertySource} * * @author liuenyuan * @see org.springframework.context.annotation.PropertySource **/@Target(ElementType.TYPE)@Retention(RetentionPolicy.RUNTIME)@Documented@Repeatable(YamlPropertySources.class)public @interface YamlPropertySource { /** * Indicate the name of this property source. If omitted, a name will * be generated based on the description of the underlying resource. * * @see org.springframework.core.env.PropertySource#getName() * @see org.springframework.core.io.Resource#getDescription() */ String name() default ""; /** * Indicate the resource location(s) of the properties file to be loaded. * <p>Both traditional and XML-based properties file formats are supported * — for example, {@code "classpath:/com/myco/app.properties"} * or {@code "file:/path/to/file.xml"}. * <p>Resource location wildcards (e.g. **/*.properties) are not permitted; * each location must evaluate to exactly one {@code .properties} resource. * <p>${...} placeholders will be resolved against any/all property sources already * registered with the {@code Environment}. See {@linkplain PropertySource above} * for examples. * <p>Each location will be added to the enclosing {@code Environment} as its own * property source, and in the order declared. */ String[] value(); /** * Indicate if failure to find the a {@link #value() property resource} should be * ignored. * <p>{@code true} is appropriate if the properties file is completely optional. * Default is {@code false}. * * @since 4.0 */ boolean ignoreResourceNotFound() default false; /** * A specific character encoding for the given resources, e.g. "UTF-8". * * @since 4.3 */ String encoding() default ""; /** * Specify a custom {@link PropertySourceFactory}, if any. * <p>By default, a default factory for standard resource files will be used. * * @see org.springframework.core.io.support.DefaultPropertySourceFactory * @see org.springframework.core.io.support.ResourcePropertySource * @since 4.3 */ Class<? extends PropertySourceFactory> factory() default YamlPropertySourceFactory.class;}/** * @author liuenyuan * @see YamlPropertySource **/@Target(ElementType.TYPE)@Retention(RetentionPolicy.RUNTIME)@Documentedpublic @interface YamlPropertySources { YamlPropertySource[] value();}具体实现如下
import lombok.extern.slf4j.Slf4j;import org.springframework.beans.BeansException;import org.springframework.beans.factory.config.InstantiationAwareBeanPostProcessorAdapter;import org.springframework.beans.factory.config.YamlPropertiesFactoryBean;import org.springframework.context.EnvironmentAware;import org.springframework.context.ResourceLoaderAware;import org.springframework.context.annotation.Configuration;import org.springframework.core.Ordered;import org.springframework.core.annotation.AnnotationUtils;import org.springframework.core.annotation.Order;import org.springframework.core.env.*;import org.springframework.core.io.Resource;import org.springframework.core.io.ResourceLoader;import org.springframework.util.Assert;import java.io.IOException;import java.util.*;/** * 类描述: {@link YamlPropertySource} bean post processor.this class convert the yml or yaml file {@link YamlPropertySource#value()} to {@link PropertiesPropertySource},and add the property source * named {@link YamlPropertySource#name()} into {@link Environment}.When you use this annotation,you * must for follow example: * <pre>{@code * @link @ConfigurationProperties(prefix = "person") * @link @YmlPropertySource(value = {"classpath:/hello.yml"}, name = "hello") * @link @Data * public class PersonProperties { * * private String name; * * private Integer age; * * private String school; * }}</pre> * * @author liuenyuan * @date 2019/6/16 20:13 * @describe * @see YamlPropertySource * @see InstantiationAwareBeanPostProcessorAdapter * @see EnvironmentAware * @see ResourceLoaderAware */@Slf4j@Configuration(value = YamlPropertySourceAnnotationPostProcessor.BEAN_NAME)@Order(Ordered.HIGHEST_PRECEDENCE)public class YamlPropertySourceAnnotationPostProcessor extends InstantiationAwareBeanPostProcessorAdapter implements EnvironmentAware, ResourceLoaderAware { public final static String BEAN_NAME = "yamlPropertySourceAnnotationPostProcessor"; private Environment environment; private ResourceLoader resourceLoader; private final List<String> propertySourceNames = new ArrayList<>(); private static final PropertySourceFactory DEFAULT_PROPERTY_SOURCE_FACTORY = new YamlPropertySourceFactory(); @Override public void setEnvironment(Environment environment) { Assert.isInstanceOf(ConfigurableEnvironment.class, environment, "environment must be instance of ConfigurableEnvironment."); this.转载于:https://www.cnblogs.com/liuenyuan1996/p/11033080.html
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