cookie实现登陆页面保存用户名

1.首先是用户名，密码的input 和保存状态的checkbox

<input class="ipt" type="text" name='username' value='${name}'/>
<input class="ipt" type='password' name='password' id='password' />
<input style=" margin-left:60px; margin-right:10px; " type="checkbox" name="rememberMe" id="rememberMe" />

没找到怎么保存checkbox的状态，我就自己写了个

<script>
    window.onload = function() {
        if ('${name}' != '') {
            document.getElementById('rememberMe').checked = true;
        } else {
            document.getElementById('rememberMe').checked = false;
        }
    }
</script>

2.然后在jsp顶部加入java代码，用于读取cookie

<%
    String name = "";
    String psw = "";
    String checked = "";
    Cookie[] cookies = request.getCookies();
    if(cookies != null && cookies.length>0){
        for(int i =0; i<cookies.length; i++){
            if(cookies[i].getName().equals("name")){
                name=cookies[i].getValue();
                request.setAttribute("name",name);
            }

            if(cookies[i].getName().equals("psw")){
                psw=cookies[i].getValue();
                request.setAttribute("psw",psw);
            }
        }
    }
%>

3.其次，在登陆到后台验证完毕密码后面加入

//处理Cookie
addCookie(username , pwd ,response ,request);

下面是addCookie这个方法

/**Cookie的实现
     * @throws UnsupportedEncodingException **/
    private void addCookie(String name, String password,HttpServletResponse response, HttpServletRequest request) throws UnsupportedEncodingException  {
        if(StringUtils.isNotBlank(name)&&StringUtils.isNotBlank(password)){
            //创建Cookie
//          Cookie nameCookie=new Cookie("name",URLEncoder.encode(name,"utf-8"));
            Cookie nameCookie=new Cookie("name",name);
            Cookie pswCookie=new Cookie("psw",password);

            //设置Cookie的父路径
            nameCookie.setPath(request.getContextPath()+"/");
            pswCookie.setPath(request.getContextPath()+"/");

            //获取是否保存Cookie
            String rememberMe=request.getParameter("rememberMe");
            if(rememberMe==null){//不保存Cookie
                nameCookie.setMaxAge(0);
                pswCookie.setMaxAge(0);
            }else{//保存Cookie的时间长度，单位为秒
                nameCookie.setMaxAge(7*24*60*60);
                pswCookie.setMaxAge(7*24*60*60);
            }
            //加入Cookie到响应头
            response.addCookie(nameCookie);
            response.addCookie(pswCookie);
        }
    }
}  
1.首先是用户名，密码的input 和保存状态的checkbox
<input class="ipt" type="text" name='username' value='${name}'/>
<input class="ipt" type='password' name='password' id='password' />
<input style=" margin-left:60px; margin-right:10px; " type="checkbox" name="rememberMe" id="rememberMe" />

没找到怎么保存checkbox的状态，我就自己写了个

<script>
    window.onload = function() {
        if ('${name}' != '') {
            document.getElementById('rememberMe').checked = true;
        } else {
            document.getElementById('rememberMe').checked = false;
        }
    }
</script>

2.然后在jsp顶部加入java代码，用于读取cookie
<%
    String name = "";
    String psw = "";
    String checked = "";
    Cookie[] cookies = request.getCookies();
    if(cookies != null && cookies.length>0){
        for(int i =0; i<cookies.length; i++){
            if(cookies[i].getName().equals("name")){
                name=cookies[i].getValue();
                request.setAttribute("name",name);
            }

            if(cookies[i].getName().equals("psw")){
                psw=cookies[i].getValue();
                request.setAttribute("psw",psw);
            }
        }
    }
%>

3.其次，在登陆到后台验证完毕密码后面加入
//处理Cookie
addCookie(username , pwd ,response ,request);
下面是addCookie这个方法

/**Cookie的实现
     * @throws UnsupportedEncodingException **/
    private void addCookie(String name, String password,HttpServletResponse response, HttpServletRequest request) throws UnsupportedEncodingException  {
        if(StringUtils.isNotBlank(name)&&StringUtils.isNotBlank(password)){
            //创建Cookie
//          Cookie nameCookie=new Cookie("name",URLEncoder.encode(name,"utf-8"));
            Cookie nameCookie=new Cookie("name",name);
            Cookie pswCookie=new Cookie("psw",password);

            //设置Cookie的父路径
            nameCookie.setPath(request.getContextPath()+"/");
            pswCookie.setPath(request.getContextPath()+"/");

            //获取是否保存Cookie
            String rememberMe=request.getParameter("rememberMe");
            if(rememberMe==null){//不保存Cookie
                nameCookie.setMaxAge(0);
                pswCookie.setMaxAge(0);
            }else{//保存Cookie的时间长度，单位为秒
                nameCookie.setMaxAge(7*24*60*60);
                pswCookie.setMaxAge(7*24*60*60);
            }
            //加入Cookie到响应头
            response.addCookie(nameCookie);
            response.addCookie(pswCookie);
        }
    }
}
这是我借鉴CSDN一位前辈的