package com.yhcms.utils;

import java.io.UnsupportedEncodingException;
import javax.servlet.http.HttpServletRequest;

/**
 * <p>Title:Request的參數(shù)轉(zhuǎn)換</p>
 * <li>從Request取得的各種變量類型的轉(zhuǎn)換</li>
 * <br><b>CopyRight: yyhweb[由由華網(wǎng)]</b>
 * @author stephen
 * @version YH-2.0
 */
public class ReqUtils {
	
	/**
	 * @param request request
	 * @throws UnsupportedEncodingException
	 */
	public static void setCharacterEncoding(HttpServletRequest request)
			throws UnsupportedEncodingException {
		request.setCharacterEncoding("UTF-8");
	}

	/**
	 * @param request
	 * @param paramName 參數(shù)名稱
	 * @return 從request獲取參數(shù)對應(yīng)字符串值
	 * @throws UnsupportedEncodingException
	 */
	public static String getString(HttpServletRequest request, String paramName)
			throws UnsupportedEncodingException {
		String value = request.getParameter(paramName);
		return value != null ? value : "";
	}

	/**
	 * @param request
	 * @param paramName 參數(shù)名稱
	 * @return 從request獲取參數(shù)對應(yīng)數(shù)組值
	 * @throws UnsupportedEncodingException
	 */
	public static String[] getArray(HttpServletRequest request, String paramName)
			throws UnsupportedEncodingException {
		return request.getParameterValues(paramName);
	}

	/**
	 * @param request
	 * @param paramName 參數(shù)名稱
	 * @return 從request獲取參數(shù)對應(yīng)Byte值
	 */
	public static byte getByte(HttpServletRequest request, String paramName) {
		String value = request.getParameter(paramName);
		if (value == null || value.length() == 0)
			return 0;
		else
			return Byte.parseByte(value);
	}

	/**
	 * @param request
	 * @param paramName 參數(shù)名稱
	 * @return 從request獲取參數(shù)對應(yīng)整型值
	 */
	public static int getInt(HttpServletRequest request, String paramName) {
		String value = request.getParameter(paramName);
		if (value == null || value.length() == 0)
			return 0;
		else
			return Integer.parseInt(value);
	}

	/**
	 * @param request
	 * @param paramName 參數(shù)名稱
	 * @return 從request獲取參數(shù)對應(yīng)長整型值
	 */
	public static long getLong(HttpServletRequest request, String paramName) {
		String value = request.getParameter(paramName);
		if (value == null || value.length() == 0)
			return 0L;
		else
			return Long.parseLong(value);
	}

	/**
	 * @param request
	 * @param paramName 參數(shù)名稱
	 * @return 從request獲取參數(shù)對應(yīng)短整型值
	 */
	public static short getShort(HttpServletRequest request, String paramName) {
		String value = request.getParameter(paramName);
		if (value == null || value.length() == 0)
			return 0;
		else
			return Short.parseShort(value);
	}

	/**
	 * @param request
	 * @param paramName 參數(shù)名稱
	 * @return 從request獲取參數(shù)對應(yīng)布爾值
	 */
	public static boolean getBoolean(HttpServletRequest request,
			String paramName) {
		String value = request.getParameter(paramName);
		if (value == null || value.length() == 0)
			return false;
		else
			return Boolean.valueOf(value).booleanValue();
	}
}