JAVA³£ÓòÙ×÷Óï¾ä ÏîÄ¿ÖеÄ×ܽáÎå
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DecimalFormat df = new DecimalFormat(",###.00");
double aNumber = 33665448856.6568975;
String result = df.format(aNumber);
Sytem. out.println(result);
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33,665,448,856.66
·ÖÎö×Ö·û´®
StringTokenizer(String s) ¹¹ÔìÒ»¸ö·ÖÎöÆ÷£¬Ê¹ÓÃĬÈÏ·Ö¸ô×Ö·û£¨¿Õ¸ñ£¬»»ÐУ¬»Ø³µ£¬Tab£¬½øÖ½·û£©
StringTokenizer(String s,String delim) delimÊÇ×Ô¼º¶¨ÒåµÄ·Ö¸ô·û
nextToken() Öð¸ö»ñÈ¡×Ö·û´®ÖеÄÓïÑÔ·ûºÅ
boolean hasMoreTokens() Ö»Òª×Ö·û´®»¹ÓÐÓïÑÔ·ûºÅ½«·µ»Øtrue£¬·ñÔò·µ»Øfalse
countTokens() µÃµ½Ò»¹²ÓжàÉÙ¸öÓïÑÔ·ûºÅ
Êý×éµÄÑ¡ÔñÅÅÐò
public void ListNum(int[] a){
for(int k=0;k<a.length-1;k++){
int j=k;
int mini=a[k];
for(int i=k+1;i<a.length;i++){
if(a[k]>a[i]){
a[k]=a[i];
j=i;
}
}
a[j]=mini;
}
}
MD5ºÍÒ»¸ö¿ÉÄæ¼ÓÃÜËã·¨Ïà½ÓºÏµÄ¼ÓÃܺͽâÃܳÌÐò
import java.security.MessageDigest;
/**
*ÏÈͨ¹ýMD5¼ÓÃÜÖ®ºó£¬ÔÙÀ´Ò»´Î¿ÉÄæµÄ¼ÓÃÜ¡£
*˳Ðò¿ÉÒÔµ÷Õû£¬¿ÉÒÔÑ¡ÔñÏÈÓÿÉÄæ¼ÓÃÜ£¬È»ºóÔÙÓÃMD5¼ÓÃÜ
*/
public class MD5andKL{
//MD5¼ÓÂë¡£32λ
public static String MD5(String inStr) {
MessageDigest md5 = null;
try {
md5 = MessageDigest.getInstance("MD5");
} catch (Exception e) {
System.out.println(e.toString());
e.printStackTrace();
return "";
}
char[] charArray = inStr.toCharArray();
byte[] byteArray = new byte[charArray.length];
for (int i = 0; i < charArray.length; i++)
byteArray[i] = (byte) charArray[i];
byte[] md5Bytes = md5.digest(byteArray);
StringBuffer hexValue = new StringBuffer();
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JXL(Java Excel API)ÊÇÒ»¸öÓÃÀ´¶¯Ì¬¶ÁдExcelÎļþµÄ¿ªÔ´¿ò¼Ü£¬ÀûÓÃËü¿ÉÒÔÔÚÈκÎÖ§³ÖJavaµÄ²Ù×÷ϵͳÉ϶¯Ì¬¶ÁдExcelÎļþ¡£JXLµÄÖ÷Ò³ÊÇ£ºhttp://www.andykhan.com/jexcelapi/£¬¿ÉÒÔÔÚÕâÀïÏÂÔØµ½ËüµÄ×îеİ汾¡£
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java -jar jxl.jar -xml test.xls
java -jar jxl.jar -cvs test.xls
ÒÔxml ......
import java.text.DateFormat;
import java.util.Calendar;
import java.util.Date;
/**
* @author troy(J2EE)
* @version 1.0
*/
public class Test {
public static void main(String[] args) throws Exception {
DateFormat df = DateFormat.getDateInstance();
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