- /**
- * 分割字符串
- *
- * @param str String 原始字符串
- * @param splitsign String 分隔符
- * @return String[] 分割后的字符串数组
- */
- @SuppressWarnings("unchecked")
- public static String[] split(String str, String splitsign) {
- int index;
- if (str == null || splitsign == null)
- return null;
- ArrayList al = new ArrayList();
- while ((index = str.indexOf(splitsign)) != -1) {
- al.add(str.substring(0, index));
- str = str.substring(index + splitsign.length());
- }
- al.add(str);
- return (String[]) al.toArray(new String[0]);
- }
- /**
- * 替换字符串
- *
- * @param from String 原始字符串
- * @param to String 目标字符串
- * @param source String 母字符串
- * @return String 替换后的字符串
- */
- public static String replace(String from, String to, String source) {
- if (source == null || from == null || to == null)
- return null;
- StringBuffer bf = new StringBuffer("");
- int index = -1;
- while ((index = source.indexOf(from)) != -1) {
- bf.append(source.substring(0, index) + to);
- source = source.substring(index + from.length());
- index = source.indexOf(from);
- }
- bf.append(source);
- return bf.toString();
- }
- /**
- * 替换字符串,能能够在html页面上直接显示(替换双引号和小于号)
- *
- * @param str String 原始字符串
- * @return String 替换后的字符串
- */
- public static String htmlencode(String str) {
- if (str == null) {
- return null;
- }
- return replace("\\"", """, replace("<", "<", str));
- }
- /**
- * 替换字符串,将被编码的转换成原始码(替换成双引号和小于号)
- *
- * @param str String
- * @return String
- */
- public static String htmldecode(String str) {
- if (str == null) {
- return null;
- }
- return replace(""", "\\"", replace("<", "<", str));
- }
- private static final String _BR = "<br/>";
- /**
- * 在页面上直接显示文本内容,替换小于号,空格,回车,TAB
- *
- * @param str String 原始字符串
- * @return String 替换后的字符串
- */
- public static String htmlshow(String str) {
- if (str == null) {
- return null;
- }
- str = replace("<", "<", str);
- str = replace(" ", " ", str);
- str = replace("\\r\\n", _BR, str);
- str = replace("\\n", _BR, str);
- str = replace("\\t", " ", str);
- return str;
- }
- /**
- * 返回指定字节长度的字符串
- *
- * @param str String 字符串
- * @param length int 指定长度
- * @return String 返回的字符串
- */
- public static String toLength(String str, int length) {
- if (str == null) {
- return null;
- }
- if (length <= 0) {
- return "";
- }
- try {
- if (str.getBytes("GBK").length <= length) {
- return str;
- }
- } catch (Exception ex) {
- }
- StringBuffer buff = new StringBuffer();
- int index = 0;
- char c;
- length -= 3;
- while (length > 0) {
- c = str.charAt(index);
- if (c < 128) {
- length--;
- } else {
- length--;
- length--;
- }
- buff.append(c);
- index++;
- }
- buff.append("...");
- return buff.toString();
- }
- /**
- * 判断是否为整数
- *
- * @param str 传入的字符串
- * @return 是整数返回true,否则返回false
- */
- public static boolean isInteger(String str) {
- Pattern pattern = Pattern.compile("^[-\\\\+]?[\\\\d]*$");
- return pattern.matcher(str).matches();
- }
- /**
- * 判断是否为浮点数,包括double和float
- *
- * @param str 传入的字符串
- * @return 是浮点数返回true,否则返回false
- */
- public static boolean isDouble(String str) {
- Pattern pattern = Pattern.compile("^[-\\\\+]?[.\\\\d]*$");
- return pattern.matcher(str).matches();
- }
- /**
- * 判断输入的字符串是否符合Email样式.
- *
- * @param str 传入的字符串
- * @return 是Email样式返回true,否则返回false
- */
- public static boolean isEmail(String str) {
- Pattern pattern = Pattern.compile("^\\\\w+([-+.]\\\\w+)*@\\\\w+([-.]\\\\w+)*\\\\.\\\\w+([-.]\\\\w+)*$");
- return pattern.matcher(str).matches();
- }
- /**
- * 判断输入的字符串是否为纯汉字
- *
- * @param str 传入的字符窜
- * @return 如果是纯汉字返回true,否则返回false
- */
- public static boolean isChinese(String str) {
- Pattern pattern = Pattern.compile("[\\u0391-\\uFFE5]+$");
- return pattern.matcher(str).matches();
- }
- /**
- * 是否为空白,包括null和""
- *
- * @param str
- * @return
- */
- public static boolean isBlank(String str) {
- return str == null || str.trim().length() == 0;
- }
- /**
- * 判断是不是合法手机
- * handset 手机号码
- */
- public static boolean isHandset(String handset) {
- try {
- if(!handset.substring(0,1).equals("1")) {
- return false;
- }
- if (handset==null || handset.length()!=11) {
- return false;
- }
- String check = "^[0123456789]+$";
- Pattern regex = Pattern.compile(check);
- Matcher matcher = regex.matcher(handset);
- boolean isMatched = matcher.matches();
- if(isMatched) {
- return true;
- } else {
- return false;
- }
- } catch (RuntimeException e) {
- return false;
- }
- }
- }
- //该片段来自于http://www.codesnippet.cn/detail/241220121150.html
来源: http://www.codesnippet.cn/detail/241220121150.html