GB2312编码转化为汉字
代码语言：javascript
复制 /**
* 将GB2312编码(十六进制)转换成汉字
*/
public static String gbkHexToString(String string) throws Exception {
byte[] bytes = new byte[string.length() / 2];
for (int i = 0; i < bytes.length; i ) {
byte high = Byte.parseByte(string.substring(i * 2, i * 2 1), 16);
byte low = Byte.parseByte(string.substring(i * 2 1, i * 2 2), 16);
bytes[i] = (byte) (high << 4 | low);
}
String result = new String(bytes, "gbk");
return result;
}
ASCII编码（16进制）转字符串
代码语言：javascript
复制 public static String ascHextoString(String s1) {
// 去除空格
String ss[] = s1.trim().split(" ");
StringBuffer sb = new StringBuffer();
for (int i = 0; i < ss.length; i ) {
sb.append(ss[i]);
}
String s = sb.toString();
byte[] baKeyword = new byte[s.length() / 2];
for (int i = 0; i < baKeyword.length; i ) {
try {
baKeyword[i] = (byte) (0xff & Integer.parseInt(s.substring(i * 2, i * 2 2), 16));
} catch (Exception e) {
e.printStackTrace();
}
}
try {
s = new String(baKeyword, "ASCII");
} catch (Exception e1) {
e1.printStackTrace();
}
return s;
}
MD5加密字符串
代码语言：javascript
复制public static String encodeMD5(String s) {
if (isEmpty(s)) {
return null;
}
MessageDigest md = null;
try {
md = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException ex) {
// ignore ex
return null;
}
char[] hexDigits = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
md.update(s.getBytes());
byte[] datas = md.digest();
int len = datas.length;
char str[] = new char[len * 2];
int k = 0;
for (int i = 0; i < len; i ) {
byte byte0 = datas[i];
str[k ] = hexDigits[byte0 >>> 4 & 0xf];
str[k ] = hexDigits[byte0 & 0xf];
}
return new String(str);
}
转换时间
代码语言：javascript
复制 /**
* 时间转换为4字节ID YYDDMMHHMMSS
* 272EDBB9 -> 191223134657
*/
public static String IDToTime(String id) {
long timeid = Long.valueOf(id, 16).longValue();
long year = ((timeid >> 26) & 0x1f) 10;
long mon = (timeid >> 22) & 0x0f;
long day = (timeid >> 17) & 0x1f;
long hour = (timeid >> 12) & 0x1f;
long min = (timeid >> 6) & 0x3f;
long sec = timeid & 0x3f;
long date = year * 10000 mon * 100 day;
long time = hour * 10000 min * 100 sec;
String StringTimer = addZeroForNum(String.valueOf(time), 6, true);
String datetime = String.valueOf(date) StringTimer;
return datetime;
}
