WEB工具类

 import java.io.UnsupportedEncodingException;
 import java.net.URLDecoder;
 import java.net.URLEncoder;
 import java.nio.charset.Charset;
 import java.util.HashMap;
 import java.util.Map;
 
 import javax.servlet.http.Cookie;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 import org.apache.commons.lang.StringUtils;
 import org.springframework.util.Assert;
 
 import com.qbskj.project.common.Setting;
 
 /**
  * Utils - Web
  *
  */
 public final class WebUtils {
 
     /**
      * 不可实例化
      */
     private WebUtils() {
     }
 
     /**
      * 添加cookie
      *
      * @param request
      *            HttpServletRequest
      * @param response
      *            HttpServletResponse
      * @param name
      *            cookie名称
      * @param value
      *            cookie值
      * @param maxAge
      *            有效期(单位: 秒)
      * @param path
      *            路径
      * @param domain
      *            域
      * @param secure
      *            是否启用加密
      */
     public static void addCookie(HttpServletRequest request, HttpServletResponse response, String name, String value,
             Integer maxAge, String path, String domain, Boolean secure) {
         Assert.notNull(request);
         Assert.notNull(response);
         Assert.hasText(name);
         try {
             name = URLEncoder.encode(name, "UTF-8");
             value = URLEncoder.encode(value, "UTF-8");
             Cookie cookie = new Cookie(name, value);
             if (maxAge != null) {
                 cookie.setMaxAge(maxAge);
             }
             if (StringUtils.isNotEmpty(path)) {
                 cookie.setPath(path);
             }
             if (StringUtils.isNotEmpty(domain)) {
                 cookie.setDomain(domain);
             }
             if (secure != null) {
                 cookie.setSecure(secure);
             }
             response.addCookie(cookie);
         } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
         }
     }
 
     /**
      * 添加cookie
      *
      * @param request
      *            HttpServletRequest
      * @param response
      *            HttpServletResponse
      * @param name
      *            cookie名称
      * @param value
      *            cookie值
      * @param maxAge
      *            有效期(单位: 秒)
      */
     public static void addCookie(HttpServletRequest request, HttpServletResponse response, String name, String value,
             Integer maxAge) {
         Setting setting = SettingUtils.get();
         addCookie(request, response, name, value, maxAge, setting.getCookiePath(), setting.getCookieDomain(), null);
     }
 
     /**
      * 添加cookie
      *
      * @param request
      *            HttpServletRequest
      * @param response
      *            HttpServletResponse
      * @param name
      *            cookie名称
      * @param value
      *            cookie值
      */
     public static void addCookie(HttpServletRequest request, HttpServletResponse response, String name, String value) {
         Setting setting = SettingUtils.get();
         addCookie(request, response, name, value, null, setting.getCookiePath(), setting.getCookieDomain(), null);
     }
 
     /**
      * 获取cookie
      *
      * @param request
      *            HttpServletRequest
      * @param name
      *            cookie名称
      * @return 若不存在则返回null
      */
     public static String getCookie(HttpServletRequest request, String name) {
         Assert.notNull(request);
         Assert.hasText(name);
         Cookie[] cookies = request.getCookies();
         if (cookies != null) {
             try {
                 name = URLEncoder.encode(name, "UTF-8");
                 for (Cookie cookie : cookies) {
                     if (name.equals(cookie.getName())) {
                         return URLDecoder.decode(cookie.getValue(), "UTF-8");
                     }
                 }
             } catch (UnsupportedEncodingException e) {
                 e.printStackTrace();
             }
         }
         return null;
     }
 
     /**
      * 移除cookie
      *
      * @param request
      *            HttpServletRequest
      * @param response
      *            HttpServletResponse
      * @param name
      *            cookie名称
      * @param path
      *            路径
      * @param domain
      *            域
      */
     public static void removeCookie(HttpServletRequest request, HttpServletResponse response, String name, String path,
             String domain) {
         Assert.notNull(request);
         Assert.notNull(response);
         Assert.hasText(name);
         try {
             name = URLEncoder.encode(name, "UTF-8");
             Cookie cookie = new Cookie(name, null);
             cookie.setMaxAge(0);
             if (StringUtils.isNotEmpty(path)) {
                 cookie.setPath(path);
             }
             if (StringUtils.isNotEmpty(domain)) {
                 cookie.setDomain(domain);
             }
             response.addCookie(cookie);
         } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
         }
     }
 
     /**
      * 移除cookie
      *
      * @param request
      *            HttpServletRequest
      * @param response
      *            HttpServletResponse
      * @param name
      *            cookie名称
      */
     public static void removeCookie(HttpServletRequest request, HttpServletResponse response, String name) {
         Setting setting = SettingUtils.get();
         removeCookie(request, response, name, setting.getCookiePath(), setting.getCookieDomain());
     }
 
     /**
      * 获取参数
      *
      * @param queryString
      *            查询字符串
      * @param encoding
      *            编码格式
      * @param name
      *            参数名称
      * @return 参数
      */
     public static String getParameter(String queryString, String encoding, String name) {
         String[] parameterValues = getParameterMap(queryString, encoding).get(name);
         return parameterValues != null && parameterValues.length > 0 ? parameterValues[0] : null;
     }
 
     /**
      * 获取参数
      *
      * @param queryString
      *            查询字符串
      * @param encoding
      *            编码格式
      * @param name
      *            参数名称
      * @return 参数
      */
     public static String[] getParameterValues(String queryString, String encoding, String name) {
         return getParameterMap(queryString, encoding).get(name);
     }
 
     /**
      * 获取参数
      *
      * @param queryString
      *            查询字符串
      * @param encoding
      *            编码格式
      * @return 参数
      */
     public static Map<String, String[]> getParameterMap(String queryString, String encoding) {
         Map<String, String[]> parameterMap = new HashMap<String, String[]>();
         Charset charset = Charset.forName(encoding);
         if (StringUtils.isNotEmpty(queryString)) {
             byte[] bytes = queryString.getBytes(charset);
             if (bytes != null && bytes.length > 0) {
                 int ix = 0;
                 int ox = 0;
                 String key = null;
                 String value = null;
                 while (ix < bytes.length) {
                     byte c = bytes[ix++];
                     switch ((char) c) {
                     case '&':
                         value = new String(bytes, 0, ox, charset);
                         if (key != null) {
                             putMapEntry(parameterMap, key, value);
                             key = null;
                         }
                         ox = 0;
                         break;
                     case '=':
                         if (key == null) {
                             key = new String(bytes, 0, ox, charset);
                             ox = 0;
                         } else {
                             bytes[ox++] = c;
                         }
                         break;
                     case '+':
                         bytes[ox++] = (byte) ' ';
                         break;
                     case '%':
                         bytes[ox++] = (byte) ((convertHexDigit(bytes[ix++]) << 4) + convertHexDigit(bytes[ix++]));
                         break;
                     default:
                         bytes[ox++] = c;
                     }
                 }
                 if (key != null) {
                     value = new String(bytes, 0, ox, charset);
                     putMapEntry(parameterMap, key, value);
                 }
             }
         }
         return parameterMap;
     }
 
     private static void putMapEntry(Map<String, String[]> map, String name, String value) {
         String[] newValues = null;
         String[] oldValues = map.get(name);
         if (oldValues == null) {
             newValues = new String[] { value };
         } else {
             newValues = new String[oldValues.length + 1];
             System.arraycopy(oldValues, 0, newValues, 0, oldValues.length);
             newValues[oldValues.length] = value;
         }
         map.put(name, newValues);
     }
 
     private static byte convertHexDigit(byte b) {
         if ((b >= '0') && (b <= '9')) {
             return (byte) (b - '0');
         }
         if ((b >= 'a') && (b <= 'f')) {
             return (byte) (b - 'a' + 10);
         }
         if ((b >= 'A') && (b <= 'F')) {
             return (byte) (b - 'A' + 10);
         }
         throw new IllegalArgumentException();
     }
 
 }