com.alibaba.otter.shared.common.utils.code.ResourceBundleUtil.java Source code

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Here is the source code for com.alibaba.otter.shared.common.utils.code.ResourceBundleUtil.java

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/*
 * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
 *
 * 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 com.alibaba.otter.shared.common.utils.code;

import java.text.MessageFormat;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import org.apache.commons.lang.StringUtils;

/**
 * <pre>
 * ResourceBundle
 * ???,?? ResourceBundleUtil,?,key???
 * 
 * :
 * 
 * ? res/BundleName.properties:
 * key1=value1
 * key2=value2,{0}
 * 
 * ?:
 * ResourceBundleUtil util = new ResourceBundleUtil("res/BundleName");
 * util.getMessage("key1");                   //:value1
 * util.getMessage("key2","stone");           //:value2,stone
 * </pre>
 * 
 * @author jianghang 2011-9-13 ?04:44:05
 */
public class ResourceBundleUtil {

    private ResourceBundle bundle; // ?

    /**
     * ResourceBundleUtil,?bundle
     * 
     * @param bundleName ???
     * @throws MissingResourceException ??,?
     */
    public ResourceBundleUtil(String bundleName) {
        this.bundle = ResourceBundle.getBundle(bundleName);
    }

    /**
     * <pre>
     * ?,?key,???
     * ?,keymessage???,?params?????
     * 
     * keynull,null
     * keymessagenull,null
     * </pre>
     * 
     * @param key ???
     * @param params ??
     * @return ???
     */
    public String getMessage(String key, String... params) {
        // ?
        if (key == null) {
            return null;
        }
        // message
        String msg = bundle.getString(key);
        // ??,msg
        if (params == null || params.length == 0) {
            return msg;
        }
        // ?,?message
        if (StringUtils.isBlank(msg)) {
            // msgnull,msg
            return msg;
        }
        return MessageFormat.format(msg, (Object[]) params);
    }

}