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兩個Filter類：登錄過濾和編碼過濾(轉)

?LoginFilter.java:

import?javax.servlet.FilterChain;

import?javax.servlet.ServletRequest;

import?javax.servlet.ServletResponse;

import?java.io.IOException;

import?javax.servlet.Filter;

import?javax.servlet.http.HttpServletRequest;

import?javax.servlet.http.HttpServletResponse;

import?javax.servlet.ServletException;

import?javax.servlet.FilterConfig;

?*?

?*?@author?Ace

?*?web.xml配置如下：?

?*?<filter>?

?*?<filter-name>login</filter-name>

?*?<filter-class>

?*?org.waityou.news.util.filters.LoginFilter

?*?</filter-class>

?*?</filter>?

?*?<filter-mapping>?

?*?<filter-name>login</filter-name>

?*?<url-pattern>/manager/*</url-pattern>?

?*?</filter-mapping>

?*/

public?class?LoginFilter?implements?Filter?{

????protected?FilterConfig?filterConfig;

????public?void?doFilter(final?ServletRequest?req,?final?ServletResponse?res,

????????????FilterChain?chain)?throws?IOException,?ServletException?{

????????HttpServletRequest?hreq?=?(HttpServletRequest)?req;

????????HttpServletResponse?hres?=?(HttpServletResponse)?res;

????????String?isLog?=?(String)?hreq.getSession().getAttribute("isLog");

????????if?((isLog?!=?null)?&&?((isLog.equals("true"))?||?(isLog?==?"true")))//檢查是否登錄

????????{

????????????chain.doFilter(req,?res);

????????????return;

????????}?else

????????????hres.sendRedirect("/error.html");//如果沒有登錄，把視圖派發到登錄頁面

????}

????public?void?destroy()?{

????????this.filterConfig?=?null;

????}

????public?void?init(FilterConfig?config)?{

????????this.filterConfig?=?config;

????}

????public?void?setFilterConfig(final?FilterConfig?filterConfig)?{

????????this.filterConfig?=?filterConfig;

????}

}

SetCharacterEncodingFilter.java:

import?java.io.IOException;

import?javax.servlet.Filter;

import?javax.servlet.FilterChain;

import?javax.servlet.FilterConfig;

import?javax.servlet.ServletException;

import?javax.servlet.ServletRequest;

import?javax.servlet.ServletResponse;

/**

?*?@author?Ace?編碼過濾，一律設置成UTF-8

?*?

?*?web.xml中配置如下：?

?*?<filter>

?*?<filter-name>Set?Character?Encoding</filter-name>

?*?<filter-class>

?*?org.waityou.news.util.filters.SetCharacterEncodingFilter

?*?</filter-class>?

?*?</filter>?

?*?<filter-mapping>

?*?<filter-name>Set?Character?Encoding</filter-name>?

?*?<url-pattern>/*</url-pattern>

?*?</filter-mapping>

?*/

public?class?SetCharacterEncodingFilter?implements?Filter?{

????

????public?void?destroy()?{}

????public?void?doFilter(ServletRequest?request,?ServletResponse?response,

????????????FilterChain?chain)?throws?IOException,?ServletException?{

????????request.setCharacterEncoding("UTF-8");

????????//?傳遞控制到下一個過濾器

????????chain.doFilter(request,?response);

????}

????

????public?void?init(FilterConfig?filterConfig)?throws?ServletException?{}

}

posted on 2006-07-24 15:54 liaojiyong 閱讀(377) 評論(0) 編輯收藏所屬分類: Java

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兩個Filter類：登錄過濾和編碼過濾(轉)