First, the principle
User view, click to view the evaluation, can see the evaluation of the product
Based on the evaluation information, we determine that comments contains id,gid,uname,comment,add_time (evaluation ID, product ID, publisher, rating information, added time)
1, Database Establishment comments Table
2. Design Comment.java (Bean)
3. Design Commodity Evaluation DAO (Commentdao.java)
(1) list<comment>searcher (int gid) query the evaluation of a product
(2) list<comment>searcher (int gid,pageinfo PageInfo) page Inquiry Product evaluation
(3) Add (COMMENTC) comments
.... You can add change reviews, delete reviews, etc. as needed
Update (int id,string uname,string msg)//ID is the evaluation information ID, it is recommended to change the content of the evaluation, other can not be changed, leave a message to delete
Delete (int uname,int ID)//Remove evaluation, you can consider only post evaluation users can delete
Second, the evaluation of bean design
Iii. Evaluation of DAO Design
Iv. viewing and publishing a product evaluation design
1. detail.jsp page, add "review" hyperlink <a href= "Comment.jsp?gid<%=g.getgid ()%>" > Reviews </a>
2. comment.jsp Page view evaluation and post evaluation
Initial static page: comment.jsp
<title> Post Review page </title>
<link rel= "stylesheet" type= "Text/css" href= "Css/style.css" >
<body>
<div class= "Wrap" >
<div class= "Icon_center" >
<ul>
<li> Ref.:10002</li>
<li> Name: Xiaomi M4 </li>
<li> Description: Dual SIM double Quad core Intelligence, 5.0 large screen </li>
<li> Price:2117</li>
<li> Quantity:20</li>
</ul>
<div class= "Clear" ></div>
</div>
<div class= "Icon_center" >
<ul class= "Left" >
<li> Reviewers: admin </li>
<li> Evaluation Time:2013-10-1</li>
<li style= "width:200px" > Information:ceshi</li>
</ul>
<ul class= "Left" >
<li> Reviewers: admin </li>
<li> Evaluation Time:2013-10-1</li>
<li style= "width:200px" > Information: Leave a message </li>
</ul>
<ul class= "Left" >
<li> Reviewers: admin </li>
<li> Evaluation Time:2013-10-1</li>
<li style= "width:200px" > Message: Post a message 2</li>
</ul>
<ul class= "Left" >
<li> Reviewers: admin </li>
<li> Evaluation Time:2014-03-1</li>
<li style= "width:200px" > Message: Post a message fkkffk</li>
</ul>
<ul class= "Left" >
<li> reviewers: John Doe </li>
<li> Evaluation Time:2014-03-1</li>
<li style= "width:200px" > Info: I test </li>
</ul>
<div class= "Clear" ></div>
</div>
<div class= "Icon_center" >
<form method=post action= "/shop/commentaddservlet" >
<textarea name= "Content" rows= "4" cols= "> Leave a message </TEXTAREA>
<br/>
<input type= "hidden" name= "gid" value= "10002" >
<input type= "hidden" name= "AddUser" value= "Anonymous" >
<input type= "Submit" value= "POST" >
</FORM>
</div>
</div>
</body>
3, Controller servlet processing add post evaluation
V. Self-Realization Delete evaluation, user modification message
This article is from the "Learn Without thinking" blog, please be sure to keep this source http://dyzyxy.blog.51cto.com/944775/1637447
16th Lesson: servlet Implementation of product user reviews
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