public class StringUtils {
private final static Pattern emailer = Pattern
.compile("\w+([-+.]\w+)@\w+([-.]\w+).\w+([-.]\w+)*");
// private final static SimpleDateFormat dateFormater = new
// SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// private final static SimpleDateFormat dateFormater2 = new
// SimpleDateFormat("yyyy-MM-dd");
private final static ThreadLocal<SimpleDateFormat> dateFormater = new ThreadLocal<SimpleDateFormat>() {
@Override
protected SimpleDateFormat initialValue() {
return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
}
};
private final static ThreadLocal<SimpleDateFormat> dateFormater2 = new ThreadLocal<SimpleDateFormat>() {
@Override
protected SimpleDateFormat initialValue() {
return new SimpleDateFormat("yyyy-MM-dd");
}
};
/**
- 将字符串转位日期类型
- @param sdate
- @return
*/
public static Date toDate(String sdate) {
try {
return dateFormater.get().parse(sdate);
} catch (ParseException e) {
return null;
}
}
/** - 以友好的方式显示时间
- @param sdate
- @return
*/
public static String friendly_time(String sdate) {
Date time = toDate(sdate);
if (time == null) {
return "Unknown";
}
String ftime = "";
Calendar cal = Calendar.getInstance();
// 判断是否是同一天
String curDate = dateFormater2.get().format(cal.getTime());
String paramDate = dateFormater2.get().format(time);
if (curDate.equals(paramDate)) {
int hour = (int) ((cal.getTimeInMillis() - time.getTime()) / 3600000);
if (hour == 0)
ftime = Math.max(
(cal.getTimeInMillis() - time.getTime()) / 60000, 1)
+ "分钟前";
else
ftime = hour + "小时前";
return ftime;
}
long lt = time.getTime() / 86400000;
long ct = cal.getTimeInMillis() / 86400000;
int days = (int) (ct - lt);
if (days == 0) {
int hour = (int) ((cal.getTimeInMillis() - time.getTime()) / 3600000);
if (hour == 0)
ftime = Math.max(
(cal.getTimeInMillis() - time.getTime()) / 60000, 1)
+ "分钟前";
else
ftime = hour + "小时前";
} else if (days == 1) {
ftime = "昨天";
} else if (days == 2) {
ftime = "前天";
} else if (days > 2 && days <= 10) {
ftime = days + "天前";
} else if (days > 10) {
ftime = dateFormater2.get().format(time);
}
return ftime;
}
/** - 判断给定字符串时间是否为今日
- @param sdate
- @return boolean
*/
public static boolean isToday(String sdate) {
boolean b = false;
Date time = toDate(sdate);
Date today = new Date();
if (time != null) {
String nowDate = dateFormater2.get().format(today);
String timeDate = dateFormater2.get().format(time);
if (nowDate.equals(timeDate)) {
b = true;
}
}
return b;
}
/** - 返回long类型的今天的日期
- @return
*/
public static long getToday() {
Calendar cal = Calendar.getInstance();
String curDate = dateFormater2.get().format(cal.getTime());
curDate = curDate.replace("-", "");
return Long.parseLong(curDate);
}
/** - 判断给定字符串是否空白串。 空白串是指由空格、制表符、回车符、换行符组成的字符串 若输入字符串为null或空字符串，返回true
- @param input
- @return boolean
*/
public static boolean isEmpty(String input) {
if (input == null || "".equals(input))
return true;
for (int i = 0; i < input.length(); i++) {
char c = input.charAt(i);
if (c != ' ' && c != 't' && c != 'r' && c != 'n') {
return false;
}
}
return true;
}
/** - 判断是不是一个合法的电子邮件地址
- @param email
- @return
*/
public static boolean isEmail(String email) {
if (email == null || email.trim().length() == 0)
return false;
return emailer.matcher(email).matches();
}
/** - 字符串转整数
- @param str
- @param defValue
- @return
*/
public static int toInt(String str, int defValue) {
try {
return Integer.parseInt(str);
} catch (Exception e) {
}
return defValue;
}
/** - 对象转整数
- @param obj
- @return 转换异常返回 0
*/
public static int toInt(Object obj) {
if (obj == null)
return 0;
return toInt(obj.toString(), 0);
}
/** - 对象转整数
- @param obj
- @return 转换异常返回 0
*/
public static long toLong(String obj) {
try {
return Long.parseLong(obj);
} catch (Exception e) {
}
return 0;
}
/** - 字符串转布尔值
- @param b
- @return 转换异常返回 false
*/
public static boolean toBool(String b) {
try {
return Boolean.parseBoolean(b);
} catch (Exception e) {
}
return false;
}
/** - 将一个InputStream流转换成字符串
- @param is
- @return
*/
public static String toConvertString(InputStream is) {
StringBuffer res = new StringBuffer();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader read = new BufferedReader(isr);
try {
String line;
line = read.readLine();
while (line != null) {
res.append(line);
line = read.readLine();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (null != isr) {
isr.close();
isr.close();
}
if (null != read) {
read.close();
read = null;
}
if (null != is) {
is.close();
is = null;
}
} catch (IOException e) {
}
}
return res.toString();
}
}