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/**
 * Copyright (c) 2014-2015, biezhi 王爵 ([email protected])
 *
 * 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.unique.commons.utils;

/**
 * html tool
 * @author biezhi
 * @since 1.0
 */
public class HtmlUtil {

    /**
     * html转义
     */
    public static String escapeHtml(String str) {
        if (null == str) return null;
        char[] cas = str.toString().toCharArray();
        StringBuilder sb = new StringBuilder();
        for (char c : cas) {
            switch (c) {
            case '&':
                sb.append("&");
                break;
            case '<':
                sb.append("<");
                break;
            case '>':
                sb.append(">");
                break;
            case '\'':
                sb.append("'");
                break;
            case '"':
                sb.append(""");
                break;
            default:
                sb.append(c);
            }
        }
        return sb.toString();
    }
}