/* ==================================================================
* Created [2009-4-27 下午11:32:55] by Jon.King
* ==================================================================
* TSS
* ==================================================================
* mailTo:jinpujun@hotmail.com
* Copyright (c) Jon.King, 2009-2012
* ==================================================================
*/
package com.jinhe.tss.core.util;
import java.util.Collection;
import java.util.List;
import java.util.StringTokenizer;
import org.apache.log4j.Logger;
/**
* <p> EasyUtils.java </p>
*
* 一些常用的工具方法
*/
public class EasyUtils {
static Logger log = Logger.getLogger(EasyUtils.class);
/**
* 将对象转换成Double。用于SQL取出的数据类型字段处理，因为double 单元测试环境下取出的是BigDecimal，jobss下取出的是Double。
* 统一转为String再转回Double。
* @param value
* @return
*/
public static final Double convertObject2Double(Object value) {
Double rlt = 0D;
try{
rlt = Double.valueOf(value == null ? "0" : value.toString());
} catch (Exception e) {
log.error(e);
}
return rlt;
}
public static final Long convertObject2Long(Object value) {
Long rlt = 0L;
try{
rlt = Long.valueOf(value == null ? "0" : value.toString());
} catch (Exception e) {
log.error(e);
}
return rlt;
}
public static final Integer convertObject2Integer(Object value) {
Integer rlt = 0;
try{
rlt = Integer.valueOf(value == null ? "0" : value.toString());
} catch (Exception e) {
log.error(e);
}
return rlt;
}
public static boolean isNullOrEmpty(String str) {
return str == null || "".equals(str.trim());
}
public static boolean isNullOrEmpty(Object obj) {
return obj == null || isNullOrEmpty(obj.toString());
}
public static boolean isNullOrEmpty(Collection<?> collection) {
return collection == null || collection.isEmpty();
}
/**
* 将list转换以”,“号隔开的一组字符串。
* 通常用于转换id列表。
*
* @param list
* @return
*/
public static String list2Str(Collection<?> list){
return list2Str(list, ",");
}
public static String list2Str(Collection<?> list, String seperator){
if( isNullOrEmpty(list) ) return "";
StringBuffer sb = new StringBuffer();
for(Object obj : list){
if(sb.length() > 0) {
sb.append(seperator);
}
sb.append(obj);
}
return sb.toString();
}
/**
* 生成下拉所需要的editorvalue, editortext
* 用法如： EasyUtils.generateComboedit(list, "year", "name", "|")。
* @param list
* @param valueName 实体value属性名称
* @param textName 实体text 属性名称
* @param seperator 分隔符 "|"/","等
* @return
*/
public static String[] generateComboedit(List<?> list, String valueName, String textName, String seperator){
StringBuffer value = new StringBuffer();
StringBuffer text = new StringBuffer();
for(Object bean : list){
if(value.length() > 0){
value.append(seperator);
text.append(seperator);
}
value.append(BeanUtil.getPropertyValue(bean, valueName));
text.append (BeanUtil.getPropertyValue(bean, textName));
}
return new String[]{value.toString(), text.toString()};
}
/**
* 转换utf8字符集
* @param str
* @return
*/
public static String toUtf8String(String str) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < str.length(); i++) {
char c = str.charAt(i);
if (c >= 0 && c <= 255) {
sb.append(c);
} else {
byte[] b;
try {
b = Character.toString(c).getBytes("utf-8");
} catch (Exception ex) {
System.out.println(ex);
b = new byte[0];
}
for (int j = 0; j < b.length; j++) {
int k = b[j];
if (k < 0)
k += 256;
sb.append("%" + Integer.toHexString(k).toUpperCase());
}
}
}
return sb.toString();
}
/**
* 将十六进制的字符串解码
* @param hex
* @return
*/
public static final byte[] decodeHex(String hex) {
char chars[] = hex.toCharArray();
byte bytes[] = new byte[chars.length / 2];
int byteCount = 0;
for(int i = 0; i < chars.length; i += 2){
int newByte = 0;
newByte |= hexCharToByte(chars[i]);
newByte <<= 4;
newByte |= hexCharToByte(chars[i + 1]);
bytes[byteCount] = (byte)newByte;
byteCount++;
}
return bytes;
}
/**
* 将字节数组加密成十六进制
* @param bytes
* @return
*/
public static final String encodeHex(byte bytes[]) {
StringBuffer buf = new StringBuffer(bytes.length * 2);
for(int i = 0; i < bytes.length; i++) {
if((bytes[i] & 0xff) < 16)
buf.append("0");
buf.append(Long.toString(bytes[i] & 0xff, 16));
}
return buf.toString();
}
private static final byte hexCharToByte(char ch) {
switch(ch) {
case 48: // '0'
return 0;
case 49: // '1'
return 1;
case 50: // '2'
return 2;
case 51: // '3'
return 3;
case 52: // '4'
return 4;
case 53: // '5'
return 5;
case 54: // '6'
return 6;
case 55: // '7'
return 7;
case 56: // '8'
return 8;
case 57: // '9'
return 9;
case 97: // 'a'
return 10;
case 98: // 'b'
return 11;
case 99: // 'c'
return 12;
case 100: // 'd'
return 13;
case 101: // 'e'
return 14;
case 102: // 'f'
return 15;
case 58: // ':'
case 59: // ';'
case 60: // '<'
case 61: // '='
case 62: // '>'
case 63: // '?'
case 64: // '@'
case 65: // 'A'
case 66: // 'B'
case 67: // 'C'
case 68: // 'D'
case 69: // 'E'
case 70: // 'F'
case 71: // 'G'
case 72: // 'H'
case 73: // 'I'
case 74: // 'J'
case 75: // 'K'
case 76: // 'L'
case 77: // 'M'
case 78: // 'N'
case 79: // 'O'
case 80: // 'P'
case 81: // 'Q'
case 82: // 'R'
case 83: // 'S'
case 84: // 'T'
case 85: // 'U'
case 86: // 'V'
case 87: // 'W'
case 88: // 'X'
case 89: // 'Y'
case 90: // 'Z'
case 91: // '['
case 92: // '\\'
case 93: // ']'
case 94: // '^'
case 95: // '_'
case 96: // '`'
default:
return 0;
}
}
/**
* 将字符串按其中子字符串分解成字符串数组。
* @param s
* @param s1
* @return
*/
public static String[] split(String s, String s1) {
if(s == null) return null;
StringTokenizer stringtokenizer = new StringTokenizer(s, s1);
int i = stringtokenizer.countTokens();
String as[] = new String[i];
for(int j = 0; j < i; j++) {
as[j] = stringtokenizer.nextToken();
}
return as;
}
public static void main(String[] args){
String s = "Jinpujun|English|name|is|JonKinga";
System.out.println(split(s, "|").length);
System.out.println(EasyUtils.encodeHex(s.getBytes()));
System.out.println(new String(EasyUtils.decodeHex(EasyUtils.encodeHex(s.getBytes()))));
}
}