resourceeditor.java

一个关于Spring框架的示例应用程序,简单使用,可以参考.

/*
 * Copyright 2002-2004 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */ 

package org.springframework.core.io;

/**
 * Editor for Resource descriptors, to automatically convert String locations
 * (e.g. "file:C:/myfile.txt" or "classpath:myfile.txt") to Resource properties
 * instead of using a String location property.
 *
 * <p>The path may contain ${...} placeholders, to be resolved as
 * system properties: e.g. ${user.dir}.
 *
 * <p>Delegates to a ResourceLoader, by default a DefaultResourceLoader.
 *
 * @author Juergen Hoeller
 * @since 28.12.2003
 * @see #PLACEHOLDER_PREFIX
 * @see #PLACEHOLDER_SUFFIX
 * @see Resource
 * @see ResourceLoader
 * @see DefaultResourceLoader
 * @see System#getProperty(String)
 */
public class ResourceEditor extends AbstractPathResolvingPropertyEditor {

	private final ResourceLoader resourceLoader;

	/**
	 * Create a new ResourceEditor with a DefaultResourceLoader.
	 * @see DefaultResourceLoader
	 */
	public ResourceEditor() {
		this.resourceLoader = new DefaultResourceLoader();
	}

	/**
	 * Create a new ResourceEditor with the given ResourceLoader.
	 * @param resourceLoader the ResourceLoader to use
	 */
	public ResourceEditor(ResourceLoader resourceLoader) {
		this.resourceLoader = resourceLoader;
	}

	public void setAsText(String text) {
		String locationToUse = resolvePath(text).trim();
		setValue(this.resourceLoader.getResource(locationToUse));
	}

}