我们可以通过正则表达式匹配HTML标签，然后将其去除：
// 去除HTML标记
s = s.replaceAll("</?[^>]+>", "");
// 去除空格、回车、换行符、制表符
s = s.replaceAll("<a>\\s*|\t|\r|\n</a>", "");
return s;
标签： Java
Java开发指南
关于Windows中配置Java环境变量的说明
一、进入环境变量设置：
打开我的电脑->属性->高级->环境变量。
二、新建系统变量JAVA_HOME和CLASSPATH：
变量名：JAVA_HOME
变量值：C:\Program Files\Java\jdk（JDK的安装目录）
变量名：CLASSPATH
变量值：.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;
三、设置Path变量：
选择“系统变量”中变量名为“Path”的环境变量，双击该变量进行编辑，把JDK安装路径中的bin目录的绝对路径添加到“Path”变量的值中，并使用半角的分号和已有的路径进行分隔。
变量名：Path
变量值：%JAVA_HOME%\bin;%JAVA_HOME%\jre\bin;
四、保存环境变量设置：
保存关闭环境变量设置界面，完成Java环境变量的配置。
关于编程生成UUID字符串的说明
一、在C#中生成UUID字符串：
// 创建GUID对象，通过GUID获取UUID Guid guid = Guid.NewGuid(); // 返回UUID字符串 return guid.ToString();
二、在Java中生成UUID字符串：
// 创建UUID对象 UUID uuid = UUID.randomUUID(); // 返回UUID字符串 return uuid.toString();
三、在PHP中生成UUID字符串：
// 生成唯一标识字符串 $ids = strtolower ( md5 ( uniqid ( mt_rand (), true ) ) ); // 定义分隔符“-” $hyphen = chr ( 45 ); // 构造UUID字符串 $uuid = substr ( $ids, 0, 8 ); $uuid .= $hyphen . substr ( $ids, 8, 4 ); $uuid .= $hyphen . substr ( $ids, 12, 4 ); $uuid .= $hyphen . substr ( $ids, 16, 4 ); $uuid .= $hyphen . substr ( $ids, 20, 12 ); // 返回UUID字符串 return $uuid;
四、在JavaScript中生成UUID字符串：
// 定义字符数组
var ids = [];
// 生成唯一标识字符数组
var hexDigits = "0123456789abcdef";
for (var i = 0; i < 36; i++) {
ids[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
}
ids[14] = "4";
ids[19] = hexDigits.substr((ids[19] & 0x3) | 0x8, 1);
// 定义分隔符“-”
ids[8] = ids[13] = ids[18] = ids[23] = "-";
// 构造UUID字符串
var uuid = ids.join("");
// 返回UUID字符串
return uuid;
更多信息请参阅：UUID_百度百科
关于编程生成MD5字符串的说明
一、在C#中生成MD5字符串：
// 要生成MD5的字符串
string text = "MD5";
// 获取字符串对应字符集的字节缓存数组
byte[] buffer = Encoding.UTF8.GetBytes(text);
// 创建MD5构造器
MD5 md5 = MD5.Create();
// 生成MD5字节缓存数组
buffer = md5.ComputeHash(buffer);
// 将MD5字节缓存数组构造成MD5字符串
StringBuilder stringBuilder = new StringBuilder();
foreach (byte item in buffer)
{
stringBuilder.Append(item.ToString("x2"));
}
// 获取MD5字符串
return stringBuilder.ToString();
二、在Java中生成MD5字符串：
// 要生成MD5的字符串
String text = "MD5";
// 获取字符串对应字符集的字节缓存数组
byte[] buffer = text.getBytes("UTF-8");
// 创建MD5构造器
MessageDigest messageDigest = MessageDigest.getInstance("MD5");
messageDigest.reset();
// 生成MD5字节缓存数组
messageDigest.update(buffer);
buffer = messageDigest.digest();
// 将MD5字节缓存数组构造成MD5字符串
StringBuffer md5Buffer = new StringBuffer();
for (int i = 0, length = buffer.length; i < length; i++) {
if (Integer.toHexString(0xFF & buffer[i]).length() == 1) {
md5Buffer.append("0").append(Integer.toHexString(0xFF & buffer[i]));
} else {
md5Buffer.append(Integer.toHexString(0xFF & buffer[i]));
}
}
// 获取MD5字符串
return md5Buffer.toString();
三、在PHP中生成MD5字符串：
// 要生成MD5的字符串 $text = 'MD5'; // 获取MD5字符串 return md5($text);
四、在JavaScript中生成MD5字符串：
// 定义MD5构造器
(function (window, undefined) {
// 判断MD5构造器是否已经定义
if (typeof (window.md5) == "function") {
return;
}
// 定义MD5构造器相关function
function safe_add(x, y) {
var lsw = (x & 0xFFFF) + (y & 0xFFFF), msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}
function bit_rol(num, cnt) {
return (num << cnt) | (num >>> (32 - cnt));
}
function md5_cmn(q, a, b, x, s, t) {
return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
}
function md5_ff(a, b, c, d, x, s, t) {
return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t) {
return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t) {
return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t) {
return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}
function binl_md5(x, len) {
x[len >> 5] |= 0x80 << (len % 32);
x[(((len + 64) >>> 9) << 4) + 14] = len;
var i, olda, oldb, oldc, oldd, a = 1732584193, b = -271733879, c = -1732584194, d = 271733878;
for (i = 0; i < x.length; i += 16) {
olda = a;
oldb = b;
oldc = c;
oldd = d;
a = md5_ff(a, b, c, d, x[i], 7, -680876936);
d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
b = md5_gg(b, c, d, a, x[i], 20, -373897302);
a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
d = md5_hh(d, a, b, c, x[i], 11, -358537222);
c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
a = md5_ii(a, b, c, d, x[i], 6, -198630844);
d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);
}
return [a, b, c, d];
}
function binl2rstr(input) {
var i, output = '';
for (i = 0; i < input.length * 32; i += 8) {
output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
}
return output;
}
function rstr2binl(input) {
var i, output = [];
output[(input.length >> 2) - 1] = undefined;
for (i = 0; i < output.length; i += 1) {
output[i] = 0;
}
for (i = 0; i < input.length * 8; i += 8) {
output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (i % 32);
}
return output;
}
function rstr_md5(s) {
return binl2rstr(binl_md5(rstr2binl(s), s.length * 8));
}
function rstr_hmac_md5(key, data) {
var i, bkey = rstr2binl(key), ipad = [], opad = [], hash;
ipad[15] = opad[15] = undefined;
if (bkey.length > 16) {
bkey = binl_md5(bkey, key.length * 8);
}
for (i = 0; i < 16; i += 1) {
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5C5C5C5C;
}
hash = binl_md5(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
return binl2rstr(binl_md5(opad.concat(hash), 512 + 128));
}
function rstr2hex(input) {
var hex_tab = '0123456789abcdef', output = '', x, i;
for (i = 0; i < input.length; i += 1) {
x = input.charCodeAt(i);
output += hex_tab.charAt((x >>> 4) & 0x0F) + hex_tab.charAt(x & 0x0F);
}
return output;
}
function str2rstr_utf8(input) {
return unescape(encodeURIComponent(input));
}
function raw_md5(s) {
return rstr_md5(str2rstr_utf8(s));
}
function hex_md5(s) {
return rstr2hex(raw_md5(s));
}
function raw_hmac_md5(k, d) {
return rstr_hmac_md5(str2rstr_utf8(k), str2rstr_utf8(d));
}
function hex_hmac_md5(k, d) {
return rstr2hex(raw_hmac_md5(k, d));
}
/**
* text：要生成MD5的字符串
* return：返回生成的MD5字符串
*/
window.md5 = function (text, key, raw) {
if (!key) {
if (!raw) {
return hex_md5(text);
}
return raw_md5(text);
}
if (!raw) {
return hex_hmac_md5(key, text);
}
return raw_hmac_md5(key, text);
};
})(window);
// 要生成MD5的字符串
var text = "MD5";
// 获取MD5字符串
return md5(text);
更多信息请参阅：MD5_百度百科