org.springframework.util.StringValueResolver#resolveStringValue ( )源码实例Demo

/**
 * Copy the properties of the supplied {@link Annotation} to the supplied target bean.
 * Any properties defined in {@code excludedProperties} will not be copied.
 * <p>A specified value resolver may resolve placeholders in property values, for example.
 * @param ann the annotation to copy from
 * @param bean the bean instance to copy to
 * @param valueResolver a resolve to post-process String property values (may be {@code null})
 * @param excludedProperties the names of excluded properties, if any
 * @see org.springframework.beans.BeanWrapper
 */
public static void copyPropertiesToBean(Annotation ann, Object bean, @Nullable StringValueResolver valueResolver,
		String... excludedProperties) {

	Set<String> excluded = (excludedProperties.length == 0 ? Collections.emptySet() :
			new HashSet<>(Arrays.asList(excludedProperties)));
	Method[] annotationProperties = ann.annotationType().getDeclaredMethods();
	BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(bean);
	for (Method annotationProperty : annotationProperties) {
		String propertyName = annotationProperty.getName();
		if (!excluded.contains(propertyName) && bw.isWritableProperty(propertyName)) {
			Object value = ReflectionUtils.invokeMethod(annotationProperty, ann);
			if (valueResolver != null && value instanceof String) {
				value = valueResolver.resolveStringValue((String) value);
			}
			bw.setPropertyValue(propertyName, value);
		}
	}
}
 

/**
 * Copy the properties of the supplied {@link Annotation} to the supplied target bean.
 * Any properties defined in {@code excludedProperties} will not be copied.
 * <p>A specified value resolver may resolve placeholders in property values, for example.
 * @param ann the annotation to copy from
 * @param bean the bean instance to copy to
 * @param valueResolver a resolve to post-process String property values (may be {@code null})
 * @param excludedProperties the names of excluded properties, if any
 * @see org.springframework.beans.BeanWrapper
 */
public static void copyPropertiesToBean(Annotation ann, Object bean, @Nullable StringValueResolver valueResolver,
		String... excludedProperties) {

	Set<String> excluded = new HashSet<>(Arrays.asList(excludedProperties));
	Method[] annotationProperties = ann.annotationType().getDeclaredMethods();
	BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(bean);
	for (Method annotationProperty : annotationProperties) {
		String propertyName = annotationProperty.getName();
		if (!excluded.contains(propertyName) && bw.isWritableProperty(propertyName)) {
			Object value = ReflectionUtils.invokeMethod(annotationProperty, ann);
			if (valueResolver != null && value instanceof String) {
				value = valueResolver.resolveStringValue((String) value);
			}
			bw.setPropertyValue(propertyName, value);
		}
	}
}
 

/**
 * Copy the properties of the supplied {@link Annotation} to the supplied target bean.
 * Any properties defined in {@code excludedProperties} will not be copied.
 * <p>A specified value resolver may resolve placeholders in property values, for example.
 * @param ann the annotation to copy from
 * @param bean the bean instance to copy to
 * @param valueResolver a resolve to post-process String property values (may be {@code null})
 * @param excludedProperties the names of excluded properties, if any
 * @see org.springframework.beans.BeanWrapper
 */
public static void copyPropertiesToBean(Annotation ann, Object bean, StringValueResolver valueResolver, String... excludedProperties) {
	Set<String> excluded = new HashSet<String>(Arrays.asList(excludedProperties));
	Method[] annotationProperties = ann.annotationType().getDeclaredMethods();
	BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(bean);
	for (Method annotationProperty : annotationProperties) {
		String propertyName = annotationProperty.getName();
		if (!excluded.contains(propertyName) && bw.isWritableProperty(propertyName)) {
			Object value = ReflectionUtils.invokeMethod(annotationProperty, ann);
			if (valueResolver != null && value instanceof String) {
				value = valueResolver.resolveStringValue((String) value);
			}
			bw.setPropertyValue(propertyName, value);
		}
	}
}
 

/**
 * Copy the properties of the supplied {@link Annotation} to the supplied target bean.
 * Any properties defined in {@code excludedProperties} will not be copied.
 * <p>A specified value resolver may resolve placeholders in property values, for example.
 * @param ann the annotation to copy from
 * @param bean the bean instance to copy to
 * @param valueResolver a resolve to post-process String property values (may be {@code null})
 * @param excludedProperties the names of excluded properties, if any
 * @see org.springframework.beans.BeanWrapper
 */
public static void copyPropertiesToBean(Annotation ann, Object bean, StringValueResolver valueResolver, String... excludedProperties) {
	Set<String> excluded =  new HashSet<String>(Arrays.asList(excludedProperties));
	Method[] annotationProperties = ann.annotationType().getDeclaredMethods();
	BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(bean);
	for (Method annotationProperty : annotationProperties) {
		String propertyName = annotationProperty.getName();
		if ((!excluded.contains(propertyName)) && bw.isWritableProperty(propertyName)) {
			Object value = ReflectionUtils.invokeMethod(annotationProperty, ann);
			if (valueResolver != null && value instanceof String) {
				value = valueResolver.resolveStringValue((String) value);
			}
			bw.setPropertyValue(propertyName, value);
		}
	}
}
 

/**
 * Copy the properties of the supplied {@link Annotation} to the supplied target bean.
 * Any properties defined in {@code excludedProperties} will not be copied.
 * <p>A specified value resolver may resolve placeholders in property values, for example.
 * @param ann the annotation to copy from
 * @param bean the bean instance to copy to
 * @param valueResolver a resolve to post-process String property values (may be {@code null})
 * @param excludedProperties the names of excluded properties, if any
 * @see org.springframework.beans.BeanWrapper
 */
public static void copyPropertiesToBean(Annotation ann, Object bean, StringValueResolver valueResolver, String... excludedProperties) {
	Set<String> excluded = new HashSet<String>(Arrays.asList(excludedProperties));
	Method[] annotationProperties = ann.annotationType().getDeclaredMethods();
	BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(bean);
	for (Method annotationProperty : annotationProperties) {
		String propertyName = annotationProperty.getName();
		if (!excluded.contains(propertyName) && bw.isWritableProperty(propertyName)) {
			Object value = ReflectionUtils.invokeMethod(annotationProperty, ann);
			if (valueResolver != null && value instanceof String) {
				value = valueResolver.resolveStringValue((String) value);
			}
			bw.setPropertyValue(propertyName, value);
		}
	}
}
 

@Override
@Nullable
public String resolveEmbeddedValue(@Nullable String value) {
	if (value == null) {
		return null;
	}
	String result = value;
	for (StringValueResolver resolver : this.embeddedValueResolvers) {
		result = resolver.resolveStringValue(result);
		if (result == null) {
			return null;
		}
	}
	return result;
}
 

@Override
@Nullable
public String resolveEmbeddedValue(@Nullable String value) {
	if (value == null) {
		return null;
	}
	String result = value;
	for (StringValueResolver resolver : this.embeddedValueResolvers) {
		result = resolver.resolveStringValue(result);
		if (result == null) {
			return null;
		}
	}
	return result;
}
 

@Override
public String resolveEmbeddedValue(String value) {
	if (value == null) {
		return null;
	}
	String result = value;
	for (StringValueResolver resolver : this.embeddedValueResolvers) {
		result = resolver.resolveStringValue(result);
		if (result == null) {
			return null;
		}
	}
	return result;
}
 

/**
 * Resolve all alias target names and aliases registered in this
 * factory, applying the given StringValueResolver to them.
 * <p>The value resolver may for example resolve placeholders
 * in target bean names and even in alias names.
 * @param valueResolver the StringValueResolver to apply
 */
public void resolveAliases(StringValueResolver valueResolver) {
	Assert.notNull(valueResolver, "StringValueResolver must not be null");
	synchronized (this.aliasMap) {
		Map<String, String> aliasCopy = new HashMap<String, String>(this.aliasMap);
		for (String alias : aliasCopy.keySet()) {
			String registeredName = aliasCopy.get(alias);
			String resolvedAlias = valueResolver.resolveStringValue(alias);
			String resolvedName = valueResolver.resolveStringValue(registeredName);
			if (resolvedAlias == null || resolvedName == null || resolvedAlias.equals(resolvedName)) {
				this.aliasMap.remove(alias);
			}
			else if (!resolvedAlias.equals(alias)) {
				String existingName = this.aliasMap.get(resolvedAlias);
				if (existingName != null) {
					if (existingName.equals(resolvedName)) {
						// Pointing to existing alias - just remove placeholder
						this.aliasMap.remove(alias);
						break;
					}
					throw new IllegalStateException(
							"Cannot register resolved alias '" + resolvedAlias + "' (original: '" + alias +
							"') for name '" + resolvedName + "': It is already registered for name '" +
							registeredName + "'.");
				}
				checkForAliasCircle(resolvedName, resolvedAlias);
				this.aliasMap.remove(alias);
				this.aliasMap.put(resolvedAlias, resolvedName);
			}
			else if (!registeredName.equals(resolvedName)) {
				this.aliasMap.put(alias, resolvedName);
			}
		}
	}
}
 

@Override
public String resolveEmbeddedValue(String value) {
	String result = value;
	for (StringValueResolver resolver : this.embeddedValueResolvers) {
		if (result == null) {
			return null;
		}
		result = resolver.resolveStringValue(result);
	}
	return result;
}
 

/**
 * Resolve all alias target names and aliases registered in this
 * factory, applying the given StringValueResolver to them.
 * <p>The value resolver may for example resolve placeholders
 * in target bean names and even in alias names.
 * @param valueResolver the StringValueResolver to apply
 */
public void resolveAliases(StringValueResolver valueResolver) {
	Assert.notNull(valueResolver, "StringValueResolver must not be null");
	synchronized (this.aliasMap) {
		Map<String, String> aliasCopy = new HashMap<String, String>(this.aliasMap);
		for (String alias : aliasCopy.keySet()) {
			String registeredName = aliasCopy.get(alias);
			String resolvedAlias = valueResolver.resolveStringValue(alias);
			String resolvedName = valueResolver.resolveStringValue(registeredName);
			if (resolvedAlias == null || resolvedName == null || resolvedAlias.equals(resolvedName)) {
				this.aliasMap.remove(alias);
			}
			else if (!resolvedAlias.equals(alias)) {
				String existingName = this.aliasMap.get(resolvedAlias);
				if (existingName != null) {
					if (existingName.equals(resolvedName)) {
						// Pointing to existing alias - just remove placeholder
						this.aliasMap.remove(alias);
						break;
					}
					throw new IllegalStateException(
							"Cannot register resolved alias '" + resolvedAlias + "' (original: '" + alias +
							"') for name '" + resolvedName + "': It is already registered for name '" +
							registeredName + "'.");
				}
				checkForAliasCircle(resolvedName, resolvedAlias);
				this.aliasMap.remove(alias);
				this.aliasMap.put(resolvedAlias, resolvedName);
			}
			else if (!registeredName.equals(resolvedName)) {
				this.aliasMap.put(alias, resolvedName);
			}
		}
	}
}
 

@Override
public String resolveEmbeddedValue(String value) {
	String result = value;
	for (StringValueResolver resolver : this.embeddedValueResolvers) {
		if (result == null) {
			return null;
		}
		result = resolver.resolveStringValue(result);
	}
	return result;
}
 

@Override
public void setEmbeddedValueResolver(StringValueResolver resolver) {
    String stringValue = resolver.resolveStringValue("操作系统：${os.name},#{2019710+1}");
    System.out.println(stringValue);
}
 

@Override
public void setEmbeddedValueResolver(StringValueResolver resolver) {
    driverClass = resolver.resolveStringValue("${db.driverClass}");
}