com.quartz.web.util.RequestUtil.java Source code

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Here is the source code for com.quartz.web.util.RequestUtil.java

Source

package com.quartz.web.util;

import com.google.common.base.Strings;
import com.quartz.web.exception.ParameterException;
import com.quartz.web.model.ResponseMessage;

import javax.servlet.http.HttpServletRequest;

/**
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.
 */
public class RequestUtil {

    /**
     * ?
     *
     * @param request
     * @param paramName
     * @return
     */
    public static <T> T validateParam(HttpServletRequest request, String paramName,
            ResponseMessage responseMessage) {
        String param = request.getParameter(paramName);
        if (!Strings.isNullOrEmpty(param)) {
            return (T) param;
        }
        responseMessage.setStatus(300);
        responseMessage.setMessage("param [" + paramName + "] is empty");
        throw new ParameterException("param [" + paramName + "] is empty");
    }

    /**
     * ?
     *
     * @param request
     * @param paraName
     * @param def
     * @return
     */
    public static int getInt(HttpServletRequest request, String paraName, int def) {
        int res = def;
        String value = request.getParameter(paraName);
        if (!Strings.isNullOrEmpty(value))
            res = Integer.valueOf(value);
        return res;
    }

    /**
     * ??String
     *
     * @param request
     * @param parameter
     * @param defau
     * @return
     */
    public static String getString(HttpServletRequest request, String parameter, String defau) {
        String defaultValue = request.getParameter(parameter);
        if (Strings.isNullOrEmpty(defaultValue))
            return defau;
        return defaultValue;
    }

    /**
     * ?
     *
     * @param request
     * @param paraName
     * @param def
     * @return
     */
    public static long getLong(HttpServletRequest request, String paraName, long def) {
        long res = def;
        String value = request.getParameter(paraName);
        if (!Strings.isNullOrEmpty(value))
            res = Long.valueOf(value);
        return res;
    }
}