/**
* 返回指定格式的时间字符串
* @param format 时间格式
* @return
*/
public static String getDateTime(String format) {
String strDateTime = "";
SimpleDateFormat sdf = new SimpleDateFormat(format);
strDateTime = sdf.format(new Date());
return strDateTime;
}
/**
* 获取指定格式的指定时间字符串
*/
public static String getDate(Date date, String format) {
SimpleDateFormat time=new SimpleDateFormat(format);
String datastr = time.format(date);
return datastr;
}
/**
* 判断是否是移动手机号码
* @param str
* @return
*/
public static boolean isMobile(String str) {
Pattern pattern = Pattern.compile("^((\\(\\d{3}\\))|(\\d{3}\\-))?(13|15|18)\\d{9}$");
Matcher matcher = pattern.matcher(str);
return matcher.matches();
}
/**
* 判断是否是移动手机号码
* @param str
* @return
*/
public static boolean isMobile(String[] str){
for(String temp:str){
if(!isMobile(temp)){
return false;
}
}
return true;
}
/**
* 判断是否是URL
* @param str
* @return
*/
public static boolean isUrl(String str){
Pattern pattern = Pattern.compile("^http:\\/\\/[A-Za-z0-9]+\\.[A-Za-z0-9]+[\\/=\\?%\\-&_~`@[\\\\]\\':+!]*([^<>\\\"\\\"])*$");
Matcher matcher = pattern.matcher(str);
return matcher.matches();
}
/**
* 判断字符串是否为空
* @param str
* @return
*/
public static boolean isBlank(String str){
return str==null||str.trim().equals("");
}
/**
* 判断对象是否为空
* @param str
* @return
*/
public static boolean isBlank(Object str){
return str==null;
}
/**
* 字符串按照指定长度截断，返回字符串数组
* @param str
* @param length
* @return
*/
public static String[] subStringToArray(String str,int length){
int size=str.length()%length==0 ?
str.length()/length : str.length()/length+1;
String[] array = new String[size];
for(int i=0;i<size;i++){
if(i!=size-1){
array[i]=str.substring(i*length, i*length+length);
}else{
array[i]=str.substring(i*length);
}
}
return array;
}
/**
* 字符串数组连接成字符串
* @param str
* @param link
* @return
*/
public static String arrayToString(String[] array,String link){
StringBuffer sb=new StringBuffer();
for(String temp : array){
if(temp!=null&&!temp.equals("")){
if(sb.length()>0){
sb.append(link);
}
sb.append(temp);
}
}
return sb.toString();
}
/**
* 压缩数组，删除null值和空字符串值
* @param array 数组
* @param split 连接符
* @param mergerSize 合并大小
* @return
*/
public static String[] compressSizeArray(String[] array,String split,int mergerSize){
List<String> result=new ArrayList<String>();
StringBuffer sb=new StringBuffer();
int count=0;
for(int i=0;i<array.length;i++){
String temp=array[i];
if(temp!=null&&!temp.equals("")){
if(sb.length()>0){
sb.append(split);
}
sb.append(temp);
count++;
}
if((count%mergerSize==0 && count!=0) || i==array.length-1){
result.add(sb.toString());
sb=new StringBuffer();
}
}
return result.toArray(new String[result.size()]);
}
/**
* 产生随机验证码
* @param count
* @return
*/
public static String getRandomCode(int count) {
Random rand = new Random();
String randNum = String.valueOf(Math.abs(rand.nextInt()));
while (randNum.length() != count) {
if (randNum.length() > count)
randNum = randNum.substring(0, randNum.length() - 1);
else
randNum = randNum + "0";
}
return randNum;
}
// 随机提取四位数
public static String getFourBitRan() {
java.util.Random ran = new java.util.Random();
String ranNum = String.valueOf(Math.abs(ran.nextInt()));
while (ranNum.length() != 4) {
if (ranNum.length() > 4)
ranNum = ranNum.substring(0, ranNum.length() - 1);
else
ranNum = ranNum + "0";
}
return ranNum;
}
/**
* 字符串转换为日期
* @param strDate 日期的字符串形式
* @param format 转换格式
* @return String 转换后的日期字符串
*/
public static Date strToDate(String strDate, String format) throws Exception {
SimpleDateFormat dateFormat = new SimpleDateFormat(format);
Date date = null;
date = dateFormat.parse(strDate);
return date;
}
/**
* 字符内码转换 ISO TO 制定编码
*/
public static String getISOtoEncode(String para, String encode) {
if (para == null || "".equals(para)) {
return "";
}
para = para.trim();
String strtmp = "";
try {
strtmp = new String(para.getBytes("iso-8859-1"), encode);
} catch (Exception e) {
e.printStackTrace();
}
return strtmp;
}
public static String lastSubstring(String source, int length){
String no = source.substring(source.length() - length);
return source.substring(0,source.length() - no.length());
}
