一个工具类WebUtil.java（包含设置cookie，得到cookie的方法，去除字符串当中的html标签的方法等等）

package com.itcast.utils;

import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
*
* @author Administrator
*
*/
public class WebUtil {

/***
* 获取URI的路径,如路径为http://www.babasport.com/action/post.htm?method=add, 得到的值为"/action/post.htm"
* @param request
* @return
*/
public static String getRequestURI(HttpServletRequest request){
return request.getRequestURI();
}
/**
* 获取完整请求路径(含内容路径及请求参数)
* @param request
* @return
*/
public static String getRequestURIWithParam(HttpServletRequest request){
return getRequestURI(request) + (request.getQueryString() == null ? "" : "?"+ request.getQueryString());
}
/**
* 添加cookie
* @param response
* @param name cookie的名称
* @param value cookie的值
* @param maxAge cookie存放的时间(以秒为单位,假如存放三天,即3*24*60*60; 如果值为0,cookie将随浏览器关闭而清除)
*/
public static void addCookie(HttpServletResponse response, String name, String value, int maxAge) {
Cookie cookie = new Cookie(name, value);
cookie.setPath("/");
if (maxAge>0) cookie.setMaxAge(maxAge);
response.addCookie(cookie);
}

/**
* 获取cookie的值
* @param request
* @param name cookie的名称
* @return
*/
public static String getCookieByName(HttpServletRequest request, String name) {
Map<String, Cookie> cookieMap = WebUtil.readCookieMap(request);
if(cookieMap.containsKey(name)){
Cookie cookie = (Cookie)cookieMap.get(name);
return cookie.getValue();
}else{
return null;
}
}

protected static Map<String, Cookie> readCookieMap(HttpServletRequest request) {
Map<String, Cookie> cookieMap = new HashMap<String, Cookie>();
Cookie[] cookies = request.getCookies();
if (null != cookies) {
for (int i = 0; i < cookies.length; i++) {
cookieMap.put(cookies[i].getName(), cookies[i]);
}
}
return cookieMap;
}
/**
* 去除html代码
* @param inputString
* @return
*/
public static String HtmltoText(String inputString) {
String htmlStr = inputString; //含html标签的字符串
String textStr ="";
java.util.regex.Pattern p_script;
java.util.regex.Matcher m_script;
java.util.regex.Pattern p_style;
java.util.regex.Matcher m_style;
java.util.regex.Pattern p_html;
java.util.regex.Matcher m_html;
java.util.regex.Pattern p_ba;
java.util.regex.Matcher m_ba;

try {
String regEx_script = "<[//s]*?script[^>]*?>[//s//S]*?<[//s]*?///[//s]*?script[//s]*?>"; //定义script的正则表达式{或<script[^>]*?>[//s//S]*?<///script> }
String regEx_style = "<[//s]*?style[^>]*?>[//s//S]*?<[//s]*?///[//s]*?style[//s]*?>"; //定义style的正则表达式{或<style[^>]*?>[//s//S]*?<///style> }
String regEx_html = "<[^>]+>"; //定义HTML标签的正则表达式
String patternStr = "//s+";

p_script = Pattern.compile(regEx_script,Pattern.CASE_INSENSITIVE);
m_script = p_script.matcher(htmlStr);
htmlStr = m_script.replaceAll(""); //过滤script标签

p_style = Pattern.compile(regEx_style,Pattern.CASE_INSENSITIVE);
m_style = p_style.matcher(htmlStr);
htmlStr = m_style.replaceAll(""); //过滤style标签

p_html = Pattern.compile(regEx_html,Pattern.CASE_INSENSITIVE);
m_html = p_html.matcher(htmlStr);
htmlStr = m_html.replaceAll(""); //过滤html标签

p_ba = Pattern.compile(patternStr,Pattern.CASE_INSENSITIVE);
m_ba = p_ba.matcher(htmlStr);
htmlStr = m_ba.replaceAll(""); //过滤空格

textStr = htmlStr;

}catch(Exception e) {
System.err.println("Html2Text: " + e.getMessage());
}
return textStr;//返回文本字符串
}
}