utils.java

详细的学生档案管理系统,包括系统管理员学生,老师,辅助管理员,功能已经很完善了

package com.nitpro.school.util;

import java.io.File;
import java.net.URL;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.swing.ImageIcon;

public class Utils {
    public final static String lastIdSql = "SELECT LAST_INSERT_ID() id";

    public static String dateToStr(Date date){
    	SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    	String str = null;
		try {
			str = sdf.format(date);
		}catch (Exception e) {
			e.printStackTrace();
		}finally {
	    	return str;
		}
    }

    public static Date strToDate(String str){
    	SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    	Date date = null;
		try {
			date = sdf.parse(str);
		}catch (Exception e) {
			e.printStackTrace();
		}finally {
	    	return date;
		}
    }
    
    public static int strToInt(String str){
    	int value = 0;
		try {
			value = Integer.parseInt(str);
		}catch (Exception e) {
			e.printStackTrace();
		}finally {
	    	return value;
		}
    }

    public static double strToDouble(String str){
    	double value = 0.0;
		try {
			value = Double.parseDouble(str);
	    	return value;
		}catch (Exception e) {
			e.printStackTrace();
		}finally {
	    	return value;
		}
    }
}