public static String encodeToHtmlEntity(String text){char[] arr = text.toCharArray();StringBuilder sb = new StringBuilder();for(char c:arr){int n = (int)c;sb.append("&#").append(n).append(";");}String str = sb.toString();return str;}public static String decodeFromHtmlEntity(String str){String[] arr = str.split(";");StringBuilder sb = new StringBuilder();for(String s:arr){String n = s.substring(2);char c = (char)Integer.parseInt(n);sb.append(c);}String m = sb.toString();return m;}

    function encodeToUnicode(data) { if(data == '') return '请输入汉字';var str =''; for(var i=0;i<data.length;i++){str+="\\u"+parseInt(data[i].charCodeAt(0),10).toString(16);}return str;} function decodeFromUnicode(data) { if(data == '') return '请输入十六进制unicode';data = data.split("\\u");var str ='';for(var i=0;i<data.length;i++){if(i==0){str += data[i];}else{var text = data[i].substring(0, 4);str += String.fromCharCode(parseInt(text,16).toString(10));var n = data[i].length;if(n>4){var s = data[i].substring(4);str += s;}}}return str;} 

    public static String encodeToUnicode(String string) {StringBuffer unicode = new StringBuffer();  for (int i = 0; i < string.length(); i++) {  // 取出每一个字符  char c = string.charAt(i);  // 转换为unicode  unicode.append("\\u" + Integer.toHexString(c));  }  return unicode.toString();  }public static String decodeFromUnicode(String unicode) {StringBuffer string = new StringBuffer();  String[] hex = unicode.split("\\\\u");  for (int i = 1; i < hex.length; i++) {  // 转换出每一个代码点  int data = Integer.parseInt(hex[i], 16);  // 追加成string  string.append((char) data);  }  return string.toString();  }

    function encodeToUrlencode(data){return encodeURIComponent(data);}function decodeFromUrlencode(data){return decodeURIComponent(data);}2.java实现public static String encodeToUrlencode(String data){try {return URLEncoder.encode(data, "UTF-8");} catch (UnsupportedEncodingException e) {return data;} }public static String decodeFromUrlencode(String data){try {return URLDecoder.decode(data, "UTF-8");} catch (UnsupportedEncodingException e) {return data;} }

// 获取当前时间戳(以s为单位)
var timestamp = Date.parse(new Date());
timestamp = timestamp / 1000;
//当前时间戳为：1403149534
console.log("当前时间戳为：" + timestamp);

// 获取某个时间格式的时间戳
var stringTime = "2014-07-10 10:21:12";
var timestamp2 = Date.parse(new Date(stringTime));
timestamp2 = timestamp2 / 1000;
//2014-07-10 10:21:12的时间戳为：1404958872
console.log(stringTime + "的时间戳为：" + timestamp2);

// 将当前时间换成时间格式字符串
var timestamp3 = 1403058804;
var newDate = new Date();
newDate.setTime(timestamp3 * 1000);
// Wed Jun 18 2014
console.log(newDate.toDateString());
// Wed, 18 Jun 2014 02:33:24 GMT
console.log(newDate.toGMTString());
// 2014-06-18T02:33:24.000Z
console.log(newDate.toISOString());
// 2014-06-18T02:33:24.000Z
console.log(newDate.toJSON());
// 2014年6月18日
console.log(newDate.toLocaleDateString());
// 2014年6月18日 上午10:33:24
console.log(newDate.toLocaleString());
// 上午10:33:24
console.log(newDate.toLocaleTimeString());
// Wed Jun 18 2014 10:33:24 GMT+0800 (中国标准时间)
console.log(newDate.toString());
// 10:33:24 GMT+0800 (中国标准时间)
console.log(newDate.toTimeString());
// Wed, 18 Jun 2014 02:33:24 GMT
console.log(newDate.toUTCString());Date.prototype.format = function(format) {var date = {"M+": this.getMonth() + 1,"d+": this.getDate(),"h+": this.getHours(),"m+": this.getMinutes(),"s+": this.getSeconds(),"q+": Math.floor((this.getMonth() + 3) / 3),"S+": this.getMilliseconds()};if (/(y+)/i.test(format)) {format = format.replace(RegExp.$1, (this.getFullYear() + '').substr(4 - RegExp.$1.length));}for (var k in date) {if (new RegExp("(" + k + ")").test(format)) {format = format.replace(RegExp.$1, RegExp.$1.length == 1? date[k] : ("00" + date[k]).substr(("" + date[k]).length));}}return format;
}
console.log(newDate.format('yyyy-MM-dd h:m:s'));