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hello.Functions

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 hello;

/**
 *
 * @author iridiumcao@gmail.com
 *
 */
public class Functions {
    public static String reverse(String text) {
        return new StringBuffer(text).reverse().toString();
    }

    public static int getStringSize(String string) {
        return string.length();
    }
}


这个文件改写自 Tomcat 的例子,故保留这段 License 信息。






















这里的方法必须是 public static 的,否者 EL 无法调用。




如果写接受多个参数的方法,也是可以的,调用的时候传入进去就行了。返回类型也不一定要是 String, 这里就用了 int.
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