commutil.java

电子邮件收发系统,采用各种技术进行研究开发适用大学生课程设计

package net.meybo.util;

import java.io.File;
public abstract class CommUtil {
	private static final java.text.SimpleDateFormat dateFormat=new java.text.SimpleDateFormat("yyyy-MM-dd");
	public static java.text.SimpleDateFormat getDateFormat() {
		return dateFormat;
	}
	public static String format(java.util.Date v)
	{
		return dateFormat.format(v);
	}
	public static java.util.Date formatDate(String s)
	{
		java.util.Date d=null;
		try{
		d=dateFormat.parse(s);
		}
		catch(Exception e)
		{
			
		}
		return d;
	}
	public static String null2String(Object s)
	{
		return s==null?"":s.toString();
	}
	public static String null2String(String s)
	{
		return s==null?"":s.toString();
	}
	public static int null2Int(String s)
	{
		return com.easyjf.util.CommUtil.null2Int(s);
	}
	 public static String round(double inNumber,int param){
	        String format="#.";
	        for(int i=0;i<param;i++){
	            format=format.concat("#");
	        }
	        //去掉多余小数点
	        if(param==0){
	            format=format.substring(0,format.toString().length()-1);
	        }
	        java.text.DecimalFormat df =new java.text.DecimalFormat(format);
	        return  df.format(inNumber);
	    }

	public static String  getOnlyID(){
		return com.easyjf.util.CommUtil.getOnlyID();
	  }
	public static String getNewFileID(String path, String ext) {
		String id = "";
		try {
			boolean flag = true;
			do {
				id = CommUtil.getOnlyID();
				File file = new File(path + id + ext);
				if (!file.exists())
					flag = false;
			} while (flag == true);
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		return id;
	}
	/**
	 * 显示页码
	 * @param currentPage
	 * @param pages
	 * @return
	 */
	public static String showPageHtml(int currentPage,int pages)
	{
		String s="";
		if(currentPage>1)
			{
			s+="<a href=# onclick='GoPage(1)'>未页</a> ";
			s+="<a href=# onclick='GoPage("+(currentPage+1)+")'>下一页</a> ";				
			}
		if(currentPage<pages)
		{
			s+="<a href=# onclick='GoPage("+pages+")'>首页</a> ";
			s+="<a href=# onclick='GoPage("+(currentPage-1)+")'>上一页</a> ";
		}
		int beginPage=currentPage-3<1?1:currentPage-3;
		if(beginPage<pages){
			s+="第";
		for(int i=beginPage,j=0;i<pages&&j<6;i++,j++)
		{
			s+="<a href=# onclick='GoPage("+i+")'>"+i+"</a> ";
		}
		s+="页";
		}
		s+=" 转到<input type=text size=2>页";
		return s;
	}
	public static String toChinese(String strvalue) 
	  { 
	       return com.easyjf.util.CommUtil.toChinese(strvalue);
	  } 
}