1.jsp页面： 


1. <% String flag = (String)session.getAttribute("flag")==null?"":(String)session.getAttribute("flag");  
2.    
3. String name = "";  
4. String password = "";  
5. try{   
6. cookies=request.getCookies();   
7.     if(cookies!=null){   
8. i=0;i<cookies.length;i++){   
9.         if(cookies[i].getName().equals("cookie_user")){   
10. value =  cookies[i].getValue();  
11.         if(value!=null&&!"".equals(value)){  
12. name=cookies[i].getValue().split("-")[0];   
13.             if(cookies[i].getValue().split("-")[1]!=null && !cookies[i].getValue().split("-")[1].equals("null")){  
14. password=cookies[i].getValue().split("-")[1];   
15.              }  
16.                         
17.             }  
18.             }   
19.         request.setAttribute("name",name);   
20.         request.setAttribute("passward",password);   
21.     }   
22.     }   
23. }catch(Exception e){   
24.     e.printStackTrace();   
25. }   
26. %>   
27. <body>  
28. <div id="logo"><img src="<%=request.getContextPath() %>/frontsite/Images/Logo.jpg" width="244" height="44" alt="" /></div>  
29. <div id="loginfrm">  
30. <form action="<%=request.getContextPath() %>/frontsite/login.do?method=login" method="post" id="forms" onsubmit="checkForm();return false;">  
31. <div class="frm">  
32. <ul>  
33. <li class="l1">用户名：</li>  
34. <li class="l2"><input name="login_id" type="text" id="login_id" class="input" value="<%=name %>"/></li>  
35. <li class="l3">* 最大限度为20字节</li>  
36. <li class="l1">密码：</li>  
37. <li class="l2"><input name="login_pwd" type="password" id="login_pwd" class="input" value="<%=password %>"/></li>  
38. <li class="l3">* 最大限度为20字节</li>  
39.                
40. <li class="l1">验证码：  
41. <li class="l2" style="width: 180px;"><input name="checkImg" id="checkImg" type="text" class="input" style="width: 60px;" size="10" />  
42. <img src="<%=request.getContextPath() %>/CheckImg_FT" width="49" height="22" /></li>  
43.                
44. <li class="l4">  
45. <label><input type="checkbox" name="flag" id="flag" value="1" <%if(flag!=null && flag.equals("1")){%> checked ; value ="1"; <%}else {%> value="0" <%;}%> />记住密码</label>  
46. <label><span style="margin-left:10px; color: #F00;" ><html:errors /></span></label>                 
47. </li>  
48.    
49. <li class="l4"><input type="image" name="imageField" id="imageField" src="<%=request.getContextPath() %>/frontsite/Images/login_bnt.jpg" /></li>  
50. </ul>  
51. </div>  
52. </form>  
53. </div>  
54. </body>

2.java 类：

 

1. String flag = request.getParameter("flag");  
2. //set cookie  
3. if(flag!=null && flag.equals("1")){  
4. new Cookie("cookie_user", po.getLogin_id()+"-"+form.getLogin_pwd());                  
5. 60*60*24*30); //cookie 保存30天  
6. response.addCookie(cookie);  
7. }else{    
8. new Cookie("cookie_user",po.getLogin_id()+"-"+null);                  
9. 60*60*24*30); //cookie 保存30天  
10.     response.addCookie(cookie);               
11. }