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ParseUtil

ParseUtil类主要实现将字符串（数字）转化为数值，这个在读取配置文件或数据转化过程中有很大的作用。源程序如下：

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 /**  
 *@Description: 转换类    
 */ 
package com.lulei.util;  

public class ParseUtil {

	/**
	 * @param str
	 * @param defaultDouble
	 * @return double
	 * @Author: lulei  
	 * @Description: 将字符串转化为double
	 */
	public static double parseStringToDouble(String str, double defaultDouble){
		double re = defaultDouble;
		try{
			re = Double.parseDouble(str);
		} catch (Exception e){
		}
		return re;
	}
	
	/**
	 * @param str
	 * @param defaultInt
	 * @return int
	 * @Author: lulei  
	 * @Description: 将字符串转化为int
	 */
	public static int parseStringToInt(String str, int defaultInt){
		int re = defaultInt;
		try{
			re = Integer.parseInt(str);
		} catch (Exception e){
		}
		return re;
	}
	
	/**
	 * @param str
	 * @param defaultLong
	 * @return
	 * @Author:lulei  
	 * @Description:将字符串转化为long
	 */
	public static long parseStringToLong(String str, long defaultLong) {
		long re = defaultLong;
		try{
			re = Long.parseLong(str);
		} catch (Exception e){
		}
		return re;
	}
}

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ParseRequest

ParseRequest类主要获取request参数值，并进行简单的数据转化。源程序如下：

 /**  
 *@Description:  获取request参数值
 */ 
package com.lulei.util;  

import javax.servlet.http.HttpServletRequest;

public class ParseRequest {
	
	/**
	 * @param request
	 * @param paramName
	 * @param defaultStr
	 * @return String
	 * @Author: lulei  
	 * @Description:  获取参数值，返回字符串，去除前后多余的空格
	 */
	public static String getString(HttpServletRequest request, String paramName, String defaultStr){
		String param = request.getParameter(paramName);
		if (param == null){
			return defaultStr;
		}
		try {
			return new String(param.getBytes(iso-8859-1), utf-8).trim();
		} catch (Exception e) {
			e.printStackTrace();
			return defaultStr;
		}
	}
	/**
	 * @param request
	 * @param paramName
	 * @param defaultStr
	 * @return
	 * @Author: lulei  
	 * @Description:   获取参数值，返回字符串，参数采用gbk编码，去除前后多余的空格
	 */
	public static String getStringGbk(HttpServletRequest request, String paramName, String defaultStr){
		String param = request.getParameter(paramName);
		if (param == null){
			return defaultStr;
		}
		try {
			return new String(param.getBytes(iso-8859-1), gbk).trim();
		} catch (Exception e) {
			e.printStackTrace();
			return defaultStr;
		}
	}
	
	/**
	 * @param request
	 * @param paramName
	 * @param defaultInt
	 * @return int
	 * @Author: lulei  
	 * @Description:  获取参数值，返回int形整数
	 */
	public static int getInt(HttpServletRequest request, String paramName, int defaultInt){
		String param = request.getParameter(paramName);
		if (param == null){
			return defaultInt;
		}
		try {
			int re = Integer.parseInt(param);
			return re;
		} catch (Exception e) {
			return defaultInt;
		}
	}
	
	/**
	 * @param request
	 * @param paramName
	 * @param defaultlong
	 * @return long
	 * @Author: lulei  
	 * @Description:  获取参数值，返回long形数字
	 */
	public static long getLong(HttpServletRequest request, String paramName, long defaultlong){
		String param = request.getParameter(paramName);
		if (param == null){
			return defaultlong;
		}
		try {
			long re = Long.parseLong(param);
			return re;
		} catch (Exception e) {
			return defaultlong;
		}
	}
}