commutil.java

EasyJWeb的框架代码

package com.easyjf.util;

import java.beans.PropertyDescriptor;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Random;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.BeanUtilsBean;

import com.easyjf.web.WebForm;
import com.easyjf.web.tools.IPageList;

/**
 * 
 * <p>
 * Title:通过工具类,处理一些数据转换及常用功能
 * </p>
 * <p>
 * Description: 包括一些类型转换,数据格式化,生成一些常用的html文本等
 * </p>
 * <p>
 * Copyright: Copyright (c) 2005
 * </p>
 * <p>
 * Company: www.easyjf.com
 * </p>
 * 
 * @author 蔡世友
 * @version 1.0
 */
public class CommUtil {
	private static final java.text.SimpleDateFormat dateFormat = new java.text.SimpleDateFormat(
			"yyyy-MM-dd");

	private static final java.text.SimpleDateFormat timeFormat = new java.text.SimpleDateFormat(
			"hh:mm:ss");

	private static final java.text.SimpleDateFormat longDateFormat = new java.text.SimpleDateFormat(
			"yyyy-MM-dd hh:mm:ss");

	private static final CommUtil util = new CommUtil();

	public static CommUtil getInstance() {
		return util;
	}

	public static java.text.SimpleDateFormat getDateFormat() {
		return dateFormat;
	}

	public static String formatDate(String format, Object v) {
		if (v == null)
			return null;
		SimpleDateFormat df = new SimpleDateFormat(format);
		return df.format(v);
	}

	public static String format(Object v) {
		if (v == null)
			return null;
		return dateFormat.format(v);
	}

	public static String sortTime(Object v) {
		if (v == null)
			return null;
		return timeFormat.format(v);
	}

	public static String longDate(Object v) {
		if (v == null)
			return null;
		return longDateFormat.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(Object s) {
		int v = 0;
		if (s != null) {
			try {
				v = Integer.parseInt(s.toString());
			} catch (Exception e) {
			}
		}
		return v;
	}

	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 getRandString(int length) {
		StringBuffer s = new StringBuffer("" + (new java.util.Date().getTime()));
		Random r = new Random(10);
		s.append(Math.abs(r.nextInt()));
		if (s.toString().length() > length)
			s.substring(0, length);
		return s.toString();
	}

	public static String getOnlyID() {
		String strRnd;
		double dblTmp;
		SimpleDateFormat df = new SimpleDateFormat("yyyyMMDDhhmmss");
		// ---- 4random
		dblTmp = java.lang.Math.random() * 100000;
		while (dblTmp < 10000) {
			dblTmp = java.lang.Math.random() * 100000;
		}
		strRnd = String.valueOf(dblTmp).substring(0, 4);
		String s = df.format(new Date()) + strRnd;
		return s;
	}

	/**
	 * 显示页码
	 * 
	 * @param currentPage
	 * @param pages
	 * @return 分布htmp字符串
	 */
	public static String showPageHtml(int currentPage, int pages) {
		String s = "";
		if (currentPage > 1) {
			s += "<a href=# onclick='return gotoPage(1)'>首页</a> ";
			s += "<a href=# onclick='return gotoPage(" + (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++) {
				if (i == currentPage)
					s += "<font color=red>" + i + "</font> ";
				else
					s += "<a href=# onclick='return gotoPage(" + i + ")'>" + i
							+ "</a> ";
			}
			s += "页　";
		}
		if (currentPage < pages) {
			s += "<a href=# onclick='return gotoPage(" + (currentPage + 1)
					+ ")'>下一页</a> ";
			s += "<a href=# onclick='return gotoPage(" + pages + ")'>末页</a> ";
		}
		// s+=" 转到<input type=text size=2>页";
		return s;
	}

	public static String showPublishPageHtml(String path, int currentPage,
			int pages) {
		String s = "";
		boolean isDir = false;
		if (path.endsWith("/"))
			isDir = true;
		if (currentPage > 1) {
			s += "<a href=" + path + (isDir ? "1" : "") + ".htm>首页</a> ";
			s += "<a href=" + path
					+ (currentPage - 1 > 1 ? (currentPage - 1) + "" : "")
					+ ".htm>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++) {
				if (i == currentPage)
					s += "<font color=red>" + i + "</font> ";
				else
					s += "<a href=" + path
							+ (i > 1 ? i + "" : (isDir ? i + "" : ""))
							+ ".htm>" + i + "</a> ";
			}
			s += "页　";
		}
		if (currentPage < pages) {
			s += "<a href=" + path + (currentPage + 1) + ".htm>下一页</a> ";
			s += "<a href=" + path + pages + ".htm>末页</a> ";
		}
		// s+=" 转到<input type=text size=2>页";
		return s;
	}

	public static String getSelectOptions(String[][] items, String value) {
		String s = "";
		for (int i = 0; i < items.length; i++) {
			s += "<option value='" + items[i][0] + "' "
					+ (items[i][0].equals(value) ? "selected" : "") + ">"
					+ items[i][1] + "</option>";
		}
		return s;
	}

	public static String getSelectOptions(int min, int max, int value) {
		String s = "";
		for (int i = min; i <= max; i++) {
			s += "<option value='" + i + "' " + (i == value ? "selected" : "")
					+ ">" + i + "</option>";
		}
		return s;
	}

	public static String toChinese(String strvalue) {
		try {
			if (strvalue == null)
				return null;
			else {
				strvalue = new String(strvalue.getBytes("ISO8859_1"), "GBK");
				return strvalue;
			}
		} catch (Exception e) {
			return null;
		}
	}

	public static String toChinese(String strvalue, String charset) {
		try {
			if (charset == null || charset.equals(""))
				return toChinese(strvalue);
			else {
				strvalue = new String(strvalue.getBytes("ISO8859_1"), charset);
				return strvalue;
			}
		} catch (Exception e) {
			return null;
		}
	}

	public static Iterator CopyIterator(Class classType, Iterator src) {
		return CopyList(classType, src).iterator();
	}

	public static List CopyList(Class classType, Iterator src) {
		List tag = new ArrayList();
		while (src.hasNext()) {
			Object obj = null, ormObj = src.next();
			try {
				obj = classType.newInstance();
				BeanUtils.copyProperties(obj, ormObj);
			} catch (Exception e) {
			}
			if (obj != null)
				tag.add(obj);
		}
		return tag;
	}

	public static void Map2Obj(Map map, Object obj) {
		Iterator names = map.keySet().iterator();
		while (names.hasNext()) {
			String name = (String) names.next();
			if (BeanUtilsBean.getInstance().getPropertyUtils().isWriteable(obj,
					name)) {
				Object value = map.get(name);
				try {
					BeanUtilsBean.getInstance().copyProperty(obj, name, value);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}
	}

	public static void Obj2Map(Object obj, Map map) {
		if (map == null)
			map = new java.util.HashMap();
		PropertyDescriptor descriptors[] = BeanUtilsBean.getInstance()
				.getPropertyUtils().getPropertyDescriptors(obj);
		// System.out.println("Obj2Map:"+descriptors.length);
		for (int i = 0; i < descriptors.length; i++) {
			String name = descriptors[i].getName();
			try {
				if (descriptors[i].getReadMethod() != null) {
					map.put(name, BeanUtilsBean.getInstance()
							.getPropertyUtils().getProperty(obj, name));
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}

	public static void saveIPageList2WebForm(IPageList pList, WebForm form) {
		if (pList != null) {
			form.addResult("list", pList.getResult());
			form.addResult("pages", new Integer(pList.getPages()));
			form.addResult("rows", new Integer(pList.getRowCount()));
			form.addResult("page", new Integer(pList.getCurrentPage()));

			form.addResult("gotoPageHTML", CommUtil.showPageHtml(pList
					.getCurrentPage(), pList.getPages()));
		}
	}
}