JAVA常用函数4
public static String toGBK(String str){
if(str==null) str="";
else
try {
str=new String(str.getBytes("ISO-8859-1"),"GBK");
} catch (UnsupportedEncodingException e) {
System.out.println("转换字符串异常！"+e.getMessage());
e.printStackTrace();
}
return str;
}
public static String toUTF8(String str){
if(str==null) str="";
else
try {
str=new String(str.getBytes("ISO-8859-1"),"UTF8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return str;
}
提供一个随机类 ：）
/*
* @author talent_marquis<��˺��>
* Email: talent_marquis@163.com
* Copyright (C) 2007 talent_marquis<��˺��>
* All rights reserved.
*/
package com.dextrys.trilogy.util;
import java.util.Arrays;
import org.eclipse.swt.graphics.RGB;
public class RandomUtil
{
/**
* @param args
*/
public static void main( String[] args )
{
//System.out.println( getRandomNormalString( 8 ) );
int[] test = getRandomIntWithoutReduplicate( 0, 40, 39 );
Arrays.sort( test );
for( int i : test )
{
System.out.println( i );
}
}
/**
* get a integer array filled with random integer without reduplicate [min, max)
* @param min the minimum value
* @param max the maximum value
* @param size the capacity of the array
* @return a integer array filled with random integer without redupulicate
*/
public static int[] getRandomIntWithoutReduplicate( int min, int max, int size )
{
int[] result = new int[size];
int arraySize = max - min;
int[] intArray = new int[arraySize];
// init intArray
for( int i = 0 ; i < intArray.length ; i++ )
{
intArray[i] = i + min;
}
// get randome interger without reduplicate
for( int i = 0 ; i < size ; i++ )
{
int c = getRandomInt( min, max - i );
int index = c - min;
swap( intArray, index, arraySize - 1 - i );
result[i] = intArray[ arraySize - 1 - i ];
}
return result;
}
private static void swap( int[] array, int x, int y )
{
int temp = array[x];
array[x] = array[y];
array[y] = temp;
}
/**
* get a random Integer with the range [min, max)
* @param min the minimum value
* @param max the maximum value
* @return the random Integer value
*/
public static int getRandomInt( int min, int max )
{
// include min, exclude max
int result = min + new Double( Math.random() * ( max - min ) ).intValue();
return result;
}
/**
* get a random double with the range [min, max)
* @param min the minimum value
* @param max the maximum value
* @return the random double value
*/
public static double getRandomDouble( double min, double max )
{
// include min, exclude max
double result = min + ( Math.random() * ( max - min ) );
return result;
}
/**
*
* @return a random char with the range ASCII 33(!) to ASCII 126(~)
*/
public static char getRandomChar()
{
// from ASCII code 33 to ASCII code 126
int firstChar = 33; // "!"
int lastChar = 126; // "~"
char result = ( char ) ( getRandomInt( firstChar, lastChar + 1 ) );
return result;
}
/**
*
* @return a random rgb color
*/
public static RGB getRandomRGB()
{
int red = getRandomInt(0,256);
int green = getRandomInt(0,256);
int blue = getRandomInt(0,256);
return new RGB( red, green, blue );
}
/**
*
* @return a random char with the range [0-9],[a-z],[A-Z]
*/
public static char getRandomNormalChar()
{
// include 0-9,a-z,A-Z
int number = getRandomInt( 0, 62 );
int zeroChar = 48;
int nineChar = 57;
int aChar = 97;
int zChar = 122;
int AChar = 65;
int ZChar = 90;
char result;
if( number < 10 )
{
result = ( char ) ( getRandomInt( zeroChar, nineChar + 1 ) );
return result;
}
else if( number >= 10 && number < 36 )
{
result = ( char ) ( getRandomInt( AChar, ZChar + 1 ) );
return result;
}
else if( number >= 36 && number < 62 )
{
result = ( char ) ( getRandomInt( aChar, zChar + 1 ) );
return result;
}
else
{
return 0;
}
}
/**
*
* @param length the length of the String
* @return a String filled with random char
*/
public static String getRandomString( int length )
{
// include ASCII code from 33 to 126
StringBuffer result = new StringBuffer();
for( int i = 0; i < length; i++ )
{
result.append( getRandomChar() );
}
return result.toString();
}
/**
*
* @param length the length of the String
* @return a String filled with normal random char
*/
public static String getRandomNormalString( int length )
{
// include 0-9,a-z,A-Z
StringBuffer result = new StringBuffer();
for( int i = 0; i < length; i++)
{
result.append( getRandomNormalChar() );
}
return result.toString();
}
}
/**
* 计算传入值是否星期六
* 回车：true or false
*/
import java.util.*;
public class Week6 {
public boolean checkWeek6(String str){
boolean flag=false;
int week6=0;
str.replace('/','-');
Calendar cal=Calendar.getInstance();
cal.setTime(java.sql.Date.valueOf(str.substring(0,10)));
week6=cal.get(Calendar.DAY_OF_WEEK);
if(week6==7){
flag=true;
}
return flag;
}
}
/**
* 取得服务器当前的各种具体时间
* 回车：日期时间
*/
import java.util.*;
public class GetNowDate{
Calendar calendar = null;
public GetNowDate(){
calendar = Calendar.getInstance();
calendar.setTime(new Date());
}
public int getYear(){
return calendar.get(Calendar.YEAR);
}
public int getMonth(){
return 1 + calendar.get(Calendar.MONTH);
}
public int getDay(){
return calendar.get(Calendar.DAY_OF_MONTH);
}
public int getHour(){
return calendar.get(Calendar.HOUR_OF_DAY);
}
public int getMinute(){
return calendar.get(Calendar.MINUTE);
}
public int getSecond(){
return calendar.get(Calendar.SECOND);
}
public String getDate(){
return getMonth()+"/"+getDay()+"/"+getYear();
}
public String getTime(){
return getHour()+":"+getMinute()+":"+getSecond();
}
public String getDate2(){
String yyyy="0000", mm="00", dd="00";
yyyy = yyyy + getYear();
mm = mm + getMonth();
dd = dd + getDay();
yyyy = yyyy.substring(yyyy.length()-4);
mm = mm.substring(mm.length()-2);
dd = dd.substring(dd.length()-2);
return yyyy + "/" + mm + "/" + dd;
}
public String getTime2(){
String hh="00", mm="00", ss="00";
hh = hh + getHour();
mm = mm + getMinute();
ss = ss + getSecond();
hh = hh.substring(hh.length()-2, hh.length());
mm = mm.substring(mm.length()-2, mm.length());
ss = ss.substring(ss.length()-2, ss.length());
return hh + ":" + mm + ":" + ss;
}
}
/**
* Big5字与Unicode的互换
* 转换后的正常字型
*/
import java.io.*;
public class MyUtil{
public static String big5ToUnicode(String s){
try{
return new String(s.getBytes("ISO8859_1"), "Big5");
}
catch (UnsupportedEncodingException uee){
return s;
}
}
public static String UnicodeTobig5(String s){
try{
return new String(s.getBytes("Big5"), "ISO8859_1");
}
catch (UnsupportedEncodingException uee){
return s;
}
}
public static String toHexString(String s){
String str="";
for (int i=0; i<s.length(); i++){
int ch=(int)s.charAt(i);
String s4="0000"+Integer.toHexString(ch);
str=str+s4.substring(s4.length()-4)+" ";
}
return str;
}
}
if(str==null) str="";
else
try {
str=new String(str.getBytes("ISO-8859-1"),"GBK");
} catch (UnsupportedEncodingException e) {
System.out.println("转换字符串异常！"+e.getMessage());
e.printStackTrace();
}
return str;
}
public static String toUTF8(String str){
if(str==null) str="";
else
try {
str=new String(str.getBytes("ISO-8859-1"),"UTF8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return str;
}
提供一个随机类 ：）
/*
* @author talent_marquis<��˺��>
* Email: talent_marquis@163.com
* Copyright (C) 2007 talent_marquis<��˺��>
* All rights reserved.
*/
package com.dextrys.trilogy.util;
import java.util.Arrays;
import org.eclipse.swt.graphics.RGB;
public class RandomUtil
{
/**
* @param args
*/
public static void main( String[] args )
{
//System.out.println( getRandomNormalString( 8 ) );
int[] test = getRandomIntWithoutReduplicate( 0, 40, 39 );
Arrays.sort( test );
for( int i : test )
{
System.out.println( i );
}
}
/**
* get a integer array filled with random integer without reduplicate [min, max)
* @param min the minimum value
* @param max the maximum value
* @param size the capacity of the array
* @return a integer array filled with random integer without redupulicate
*/
public static int[] getRandomIntWithoutReduplicate( int min, int max, int size )
{
int[] result = new int[size];
int arraySize = max - min;
int[] intArray = new int[arraySize];
// init intArray
for( int i = 0 ; i < intArray.length ; i++ )
{
intArray[i] = i + min;
}
// get randome interger without reduplicate
for( int i = 0 ; i < size ; i++ )
{
int c = getRandomInt( min, max - i );
int index = c - min;
swap( intArray, index, arraySize - 1 - i );
result[i] = intArray[ arraySize - 1 - i ];
}
return result;
}
private static void swap( int[] array, int x, int y )
{
int temp = array[x];
array[x] = array[y];
array[y] = temp;
}
/**
* get a random Integer with the range [min, max)
* @param min the minimum value
* @param max the maximum value
* @return the random Integer value
*/
public static int getRandomInt( int min, int max )
{
// include min, exclude max
int result = min + new Double( Math.random() * ( max - min ) ).intValue();
return result;
}
/**
* get a random double with the range [min, max)
* @param min the minimum value
* @param max the maximum value
* @return the random double value
*/
public static double getRandomDouble( double min, double max )
{
// include min, exclude max
double result = min + ( Math.random() * ( max - min ) );
return result;
}
/**
*
* @return a random char with the range ASCII 33(!) to ASCII 126(~)
*/
public static char getRandomChar()
{
// from ASCII code 33 to ASCII code 126
int firstChar = 33; // "!"
int lastChar = 126; // "~"
char result = ( char ) ( getRandomInt( firstChar, lastChar + 1 ) );
return result;
}
/**
*
* @return a random rgb color
*/
public static RGB getRandomRGB()
{
int red = getRandomInt(0,256);
int green = getRandomInt(0,256);
int blue = getRandomInt(0,256);
return new RGB( red, green, blue );
}
/**
*
* @return a random char with the range [0-9],[a-z],[A-Z]
*/
public static char getRandomNormalChar()
{
// include 0-9,a-z,A-Z
int number = getRandomInt( 0, 62 );
int zeroChar = 48;
int nineChar = 57;
int aChar = 97;
int zChar = 122;
int AChar = 65;
int ZChar = 90;
char result;
if( number < 10 )
{
result = ( char ) ( getRandomInt( zeroChar, nineChar + 1 ) );
return result;
}
else if( number >= 10 && number < 36 )
{
result = ( char ) ( getRandomInt( AChar, ZChar + 1 ) );
return result;
}
else if( number >= 36 && number < 62 )
{
result = ( char ) ( getRandomInt( aChar, zChar + 1 ) );
return result;
}
else
{
return 0;
}
}
/**
*
* @param length the length of the String
* @return a String filled with random char
*/
public static String getRandomString( int length )
{
// include ASCII code from 33 to 126
StringBuffer result = new StringBuffer();
for( int i = 0; i < length; i++ )
{
result.append( getRandomChar() );
}
return result.toString();
}
/**
*
* @param length the length of the String
* @return a String filled with normal random char
*/
public static String getRandomNormalString( int length )
{
// include 0-9,a-z,A-Z
StringBuffer result = new StringBuffer();
for( int i = 0; i < length; i++)
{
result.append( getRandomNormalChar() );
}
return result.toString();
}
}
/**
* 计算传入值是否星期六
* 回车：true or false
*/
import java.util.*;
public class Week6 {
public boolean checkWeek6(String str){
boolean flag=false;
int week6=0;
str.replace('/','-');
Calendar cal=Calendar.getInstance();
cal.setTime(java.sql.Date.valueOf(str.substring(0,10)));
week6=cal.get(Calendar.DAY_OF_WEEK);
if(week6==7){
flag=true;
}
return flag;
}
}
/**
* 取得服务器当前的各种具体时间
* 回车：日期时间
*/
import java.util.*;
public class GetNowDate{
Calendar calendar = null;
public GetNowDate(){
calendar = Calendar.getInstance();
calendar.setTime(new Date());
}
public int getYear(){
return calendar.get(Calendar.YEAR);
}
public int getMonth(){
return 1 + calendar.get(Calendar.MONTH);
}
public int getDay(){
return calendar.get(Calendar.DAY_OF_MONTH);
}
public int getHour(){
return calendar.get(Calendar.HOUR_OF_DAY);
}
public int getMinute(){
return calendar.get(Calendar.MINUTE);
}
public int getSecond(){
return calendar.get(Calendar.SECOND);
}
public String getDate(){
return getMonth()+"/"+getDay()+"/"+getYear();
}
public String getTime(){
return getHour()+":"+getMinute()+":"+getSecond();
}
public String getDate2(){
String yyyy="0000", mm="00", dd="00";
yyyy = yyyy + getYear();
mm = mm + getMonth();
dd = dd + getDay();
yyyy = yyyy.substring(yyyy.length()-4);
mm = mm.substring(mm.length()-2);
dd = dd.substring(dd.length()-2);
return yyyy + "/" + mm + "/" + dd;
}
public String getTime2(){
String hh="00", mm="00", ss="00";
hh = hh + getHour();
mm = mm + getMinute();
ss = ss + getSecond();
hh = hh.substring(hh.length()-2, hh.length());
mm = mm.substring(mm.length()-2, mm.length());
ss = ss.substring(ss.length()-2, ss.length());
return hh + ":" + mm + ":" + ss;
}
}
/**
* Big5字与Unicode的互换
* 转换后的正常字型
*/
import java.io.*;
public class MyUtil{
public static String big5ToUnicode(String s){
try{
return new String(s.getBytes("ISO8859_1"), "Big5");
}
catch (UnsupportedEncodingException uee){
return s;
}
}
public static String UnicodeTobig5(String s){
try{
return new String(s.getBytes("Big5"), "ISO8859_1");
}
catch (UnsupportedEncodingException uee){
return s;
}
}
public static String toHexString(String s){
String str="";
for (int i=0; i<s.length(); i++){
int ch=(int)s.charAt(i);
String s4="0000"+Integer.toHexString(ch);
str=str+s4.substring(s4.length()-4)+" ";
}
return str;
}
}
