//毫秒值转换为日期
public static String millToDate(long millisecond){
Date d = new Date(millisecond);
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
return sdf.format(d);
}
//日期转换为毫秒值
public static long dateToMilles(String date){
long time = 0;
SimpleDateFormat dateformat = new SimpleDateFormat("yyyyMMdd"); //时间格式
try {
time = dateformat.parse(date).getTime();//格式转换
} catch (java.text.ParseException e) {
e.printStackTrace();
}
return time;
} //16进制转换为10进制
public static int hexToint(String hex_num){
int dec_num = Integer.parseInt(hex_num, 16);
return dec_num;
}/**
* 16进制转2进制字符串
*
* @param hexString
* @return
*/
public static String hexString2binaryString(String hexString) {
if (hexString == null || hexString.length() % 2 != 0)
return null;
String bString = "", tmp;
for (int i = 0; i < hexString.length(); i++) {
tmp = "0000"
+ Integer.toBinaryString(Integer.parseInt(hexString
.substring(i, i + 1), 16));
bString += tmp.substring(tmp.length() - 4);
}
return bString;
}
/**
* bytes转换成十六进制字符串
*/
public static String byte2HexStr(byte[] a) {
String hs = "";
String stmp;
for (int n = 0; n < a.length; n++) {
stmp = (Integer.toHexString(a[n] & 0XFF));
if (stmp.length() == 1)
hs = hs + "0" + stmp;
else
hs = hs + stmp;
}
return hs.toUpperCase();
}
//16进制字符串转换为指定长度的字符串，不足补0
public static String hexLength(String hex,int length){
int l = hex.length();
if(l<length){
int s = length -l;
for(int i=0;i<s;i++){
hex ="0"+hex;
}
}
return hex;
}
给定一个日期转换为指定日期的字符串格式
public static String dateFormate1(String date ,String OriginalDf ,String destDf) {
try {
SimpleDateFormat sdf = new SimpleDateFormat(OriginalDf);
Date d = sdf.parse(date);
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(destDf);
return simpleDateFormat.format(d);
} catch (ParseException e) {
e.printStackTrace();
}
return "";
}
例如打印如下语句
System.out.println(dateFormate1("2016-12-26 20:56:32","yyyy-MM-dd HH:mm:ss","yyyyMMddHHmmss"));
输出:20161226205632
打印:System.out.println(dateFormate1("2016-12-26 20:56:32","yyyy-MM-dd HH:mm:ss","yyyy年MM月dd日HH时mm分ss秒"));
输出:2016年12月26日20时56分32秒
//10进制转换为16进制字符串
Integer.toHexString() /**
* 数字字符串转ASCII码字符串
*
* @param String
* 字符串
* @return ASCII字符串
*/
public static String StringToAsciiString(String content) {
String result = "";
int max = content.length();
for (int i = 0; i < max; i++) {
char c = content.charAt(i);
String b = Integer.toHexString(c);
result = result + b;
}
return result;
}
/**
* 十六进制转字符串
*
* @param hexString
* 十六进制字符串
* @param encodeType
* 编码类型4：Unicode，2：普通编码
* @return 字符串
*/
public static String hexStringToString(String hexString, int encodeType) {
String result = "";
int max = hexString.length() / encodeType;
for (int i = 0; i < max; i++) {
char c = (char) hexStringToAlgorism(hexString
.substring(i * encodeType, (i + 1) * encodeType));
result += c;
}
return result;
}
/**
* 十六进制字符串装十进制
*
* @param hex
* 十六进制字符串
* @return 十进制数值
*/
public static int hexStringToAlgorism(String hex) {
hex = hex.toUpperCase();
int max = hex.length();
int result = 0;
for (int i = max; i > 0; i--) {
char c = hex.charAt(i - 1);
int algorism = 0;
if (c >= '0' && c <= '9') {
algorism = c - '0';
} else {
algorism = c - 55;
}
result += Math.pow(16, max - i) * algorism;
}
return result;
}
/**
* 十六转二进制
*
* @param hex
* 十六进制字符串
* @return 二进制字符串
*/
public static String hexStringToBinary(String hex) {
hex = hex.toUpperCase();
String result = "";
int max = hex.length();
for (int i = 0; i < max; i++) {
char c = hex.charAt(i);
switch (c) {
case '0':
result += "0000";
break;
case '1':
result += "0001";
break;
case '2':
result += "0010";
break;
case '3':
result += "0011";
break;
case '4':
result += "0100";
break;
case '5':
result += "0101";
break;
case '6':
result += "0110";
break;
case '7':
result += "0111";
break;
case '8':
result += "1000";
break;
case '9':
result += "1001";
break;
case 'A':
result += "1010";
break;
case 'B':
result += "1011";
break;
case 'C':
result += "1100";
break;
case 'D':
result += "1101";
break;
case 'E':
result += "1110";
break;
case 'F':
result += "1111";
break;
}
}
return result;
}
/**
* ASCII码字符串转数字字符串
*
* @param String
* ASCII字符串
* @return 字符串
*/
public static String AsciiStringToString(String content) {
String result = "";
int length = content.length() / 2;
for (int i = 0; i < length; i++) {
String c = content.substring(i * 2, i * 2 + 2);
int a = hexStringToAlgorism(c);
char b = (char) a;
String d = String.valueOf(b);
result += d;
}
return result;
}
/**
* 将十进制转换为指定长度的十六进制字符串
*
* @param algorism
* int 十进制数字
* @param maxLength
* int 转换后的十六进制字符串长度
* @return String 转换后的十六进制字符串
*/
public static String algorismToHEXString(int algorism, int maxLength) {
String result = "";
result = Integer.toHexString(algorism);
if (result.length() % 2 == 1) {
result = "0" + result;
}
return patchHexString(result.toUpperCase(), maxLength);
}
/**
* 字节数组转为普通字符串（ASCII对应的字符）
*
* @param bytearray
* byte[]
* @return String
*/
public static String bytetoString(byte[] bytearray) {
String result = "";
char temp;
int length = bytearray.length;
for (int i = 0; i < length; i++) {
temp = (char) bytearray[i];
result += temp;
}
return result;
}
/**
* 二进制字符串转十进制
*
* @param binary
* 二进制字符串
* @return 十进制数值
*/
public static int binaryToAlgorism(String binary) {
int max = binary.length();
int result = 0;
for (int i = max; i > 0; i--) {
char c = binary.charAt(i - 1);
int algorism = c - '0';
result += Math.pow(2, max - i) * algorism;
}
return result;
}
/**
* 十进制转换为十六进制字符串
*
* @param algorism
* int 十进制的数字
* @return String 对应的十六进制字符串
*/
public static String algorismToHEXString(int algorism) {
String result = "";
result = Integer.toHexString(algorism);
if (result.length() % 2 == 1) {
result = "0" + result;
}
result = result.toUpperCase();
return result;
}
/**
* HEX字符串前补0，主要用于长度位数不足。
*
* @param str
* String 需要补充长度的十六进制字符串
* @param maxLength
* int 补充后十六进制字符串的长度
* @return 补充结果
*/
static public String patchHexString(String str, int maxLength) {
String temp = "";
for (int i = 0; i < maxLength - str.length(); i++) {
temp = "0" + temp;
}
str = (temp + str).substring(0, maxLength);
return str;
}
/**
* 将一个字符串转换为int
*
* @param s
* String 要转换的字符串
* @param defaultInt
* int 如果出现异常,默认返回的数字
* @param radix
* int 要转换的字符串是什么进制的,如16 8 10.
* @return int 转换后的数字
*/
public static int parseToInt(String s, int defaultInt, int radix) {
int i = 0;
try {
i = Integer.parseInt(s, radix);
} catch (NumberFormatException ex) {
i = defaultInt;
}
return i;
}
/**
* 将一个十进制形式的数字字符串转换为int
*
* @param s
* String 要转换的字符串
* @param defaultInt
* int 如果出现异常,默认返回的数字
* @return int 转换后的数字
*/
public static int parseToInt(String s, int defaultInt) {
int i = 0;
try {
i = Integer.parseInt(s);
} catch (NumberFormatException ex) {
i = defaultInt;
}
return i;
}
/**
* 十六进制字符串转为Byte数组,每两个十六进制字符转为一个Byte
*
* @param hex
* 十六进制字符串
* @return byte 转换结果
*/
public static byte[] hexStringToByte(String hex) {
int max = hex.length() / 2;
byte[] bytes = new byte[max];
String binarys =hexStringToBinary(hex);
for (int i = 0; i < max; i++) {
bytes[i] = (byte) binaryToAlgorism(binarys.substring(
i * 8 + 1, (i + 1) * 8));
if (binarys.charAt(8 * i) == '1') {
bytes[i] = (byte) (0 - bytes[i]);
}
}
return bytes;
}
/**
* 十六进制串转化为byte数组
*
* @return the array of byte
*/
public static final byte[] hex2byte(String hex)
throws IllegalArgumentException {
if (hex.length() % 2 != 0) {
throw new IllegalArgumentException();
}
char[] arr = hex.toCharArray();
byte[] b = new byte[hex.length() / 2];
for (int i = 0, j = 0, l = hex.length(); i < l; i++, j++) {
String swap = "" + arr[i++] + arr[i];
int byteint = Integer.parseInt(swap, 16) & 0xFF;
b[j] = new Integer(byteint).byteValue();
}
return b;
}
/**
* 字节数组转换为十六进制字符串
*
* @param b
* byte[] 需要转换的字节数组
* @return String 十六进制字符串
*/
public static final String byte2hex(byte b[]) {
if (b == null) {
throw new IllegalArgumentException(
"Argument b ( byte array ) is null! ");
}
String hs = "";
String stmp = "";
for (int n = 0; n < b.length; n++) {
stmp = Integer.toHexString(b[n] & 0xff);
if (stmp.length() == 1) {
hs = hs + "0" + stmp;
} else {
hs = hs + stmp;
}
}
return hs.toUpperCase();
}/**
* 获得指定文件的byte数组
*/
public static byte[] getBytes(String filePath){
byte[] buffer = null;
try {
File file = new File(filePath);
FileInputStream fis = new FileInputStream(file);
ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);
byte[] b = new byte[1000];
int n;
while ((n = fis.read(b)) != -1) {
bos.write(b, 0, n);
}
fis.close();
bos.close();
buffer = bos.toByteArray();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return buffer;
}
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