Struts2 json插件的使用

作者：houjinxin 2012-05-10 14:00:06

廢了一天的功夫,終于把我的留言功能實現(xiàn)了.有時候一個糾結(jié)的問題,會耽誤自己很長時間,如何提高開發(fā)效率,是個很大的問題!詳細(xì)請看下文

廢了一天的功夫,終于把我的留言功能實現(xiàn)了.有時候一個糾結(jié)的問題,會耽誤自己很長時間,如何提高開發(fā)效率,是個很大的問題!

總結(jié)一下今天的內(nèi)容：

我要實現(xiàn)的功能是,在一篇文章的***,添加一個留言板塊,在留言之后能夠直接顯示在頁面上

***步：在struts2基本jar包的基礎(chǔ)上添加struts2-jsonplugin

第二步：在stuts.xml文件中將extends由默認(rèn)的struts-default改為json-default

<package name="tutorial" extends="json-default">

第三步：在jsp中引入jquery

<script type="text/javascript" src="js/jquery-1.7.2.js"></script>

第四步：畫頁面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>  
<%  
    String path = request.getContextPath();  
    String basePath = request.getScheme() + "://" 
            + request.getServerName() + ":" + request.getServerPort()  
            + path + "/";  
%>  
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
<html>  
    <head>  
        <title>新聞公告</title>  
 
        <link href="css/register.css" rel="stylesheet" type="text/css" />  
        <script type="text/javascript" src="js/jquery-1.7.2.js"></script>  
        <script type="text/javascript">  
        jQuery(document).ready(function()  
       {  
                $("#mes_button").bind("click",function(event){  
                  
                var m_name = $("#m_name").val();  
                var m_content = $("#m_content").val();  
                var b_id = $("#b_id").val();  
                $.ajax({  
                    type: "POST",  
                    url: "addMessage.action",  
                    data:{"m_name":m_name,"m_content":m_content,"b_id":b_id} ,  
                    success: function (data) {  
                               $("#message_list").append("<div class='message_box' id=''><div class='message_text'><strong>"   
　　　　　　　　　　　　　　　　　　　　+ data.m_name + "</strong><p>" + data.m_content +"</p></div></div>");  
                    }  
                });  
                  
         });  
                 
        });   
 
        </script>  
    </head>  
 
    <body>  
        <div id="main">  
            <div id="head">  
 
                <div class="head_bg">  
 
                    <div class="head_menu">  
 
                        <ul>  
                            <div class="head_left">  
                                <a href="http://www.cnblogs.com/index.jsp">首頁</a>  
                            </div>  
 
                            <div class="head_right">  
                                <a href="jsp/news/news.jsp">新聞公告</a>  
                            </div>  
 
                            <div class="head_right">  
                                <a href="jsp/news/news.jsp">專業(yè)動態(tài)</a>  
                            </div>  
 
                            <div class="head_right">  
                                <a href="">文章列表</a>  
                            </div>  
 
                            <div class="head_right">  
                                <a href="jsp/news/news.jsp">成果展示</a>  
                            </div>  
 
 
                            <div class="head_right">  
                                <a href="">下載中心</a>  
                            </div>  
 
                            <div class="head_right">  
                                <a href="">管理員入口</a>  
                            </div>  
 
                        </ul>  
                    </div>  
                </div>  
            </div>  
 
            <div class="underhead">  
                <span class="l"> 正文 </span>  
            </div>  
 
            <div align="left" style="width: 100%">  
                <div class="news">  
                    <div class="newscontent">  
                        <h1>  
                            <a id="tit" class="tit" href="" target="_blank" mon="a=7">${ins.b_title }</a>  
                        </h1>  
                        <div class="overcontent">  
                            時間:${ins.b_date }  
                        </div>  
                        <div id="content">  
                            ${ins.b_content}   
                        </div>  
                        <div id="undercontent">  
                            <input id="b_id" type="hidden" name="b_id" value="8">  
                        </div>  
                    </div>  
                </div>  
                <div id="message_list">  
 
                </div>  
 
                    <div class="message">  
                        <div class="message_title">  
                            發(fā)表評論  
                        </div>  
                        <div class="message_user">  
                            用戶名:  
                            <input disabled="disabled" id="m_name" 
                                type="text" value="houjinxin" name="m_name"/>  
                        </div>  
                        <form action="">  
                            <div class="message_content">  
                                <textarea id="m_content" rows="5" cols="80" name="m_content"></textarea>  
                            </div>  
                            <div class="message_button">  
                                <input id="mes_button" type="button" value="提交評論" />  
                            </div>  
                              
                        </form>  
                    </div>  
            </div>  
            </div>  
            <div>  
                <br/>  
            </div>  
              
            <div id="foot">  
                &nbsp;&nbsp; Copyright (c) 2012 Inc All rights reserved 版權(quán)所有 by  
                黑龍江科技學(xué)院  
 
                <select>  
                    <option value="" selected>  
                        ----------友情鏈接----------  
                    </option>  
                    <option value=http://www.moe.edu.cn />  
                        國家教育部  
                    </option>  
                    <option value=http://www.pgzx.edu.cn />  
                        教育教學(xué)評估中心  
                    </option>  
                    <option value=http://www.hlje.net />  
                        省教育廳  
                    </option>  
                    <option value=http://www.chinasafety.gov.cn/index.htm>  
                        國家安全生產(chǎn)監(jiān)督管理總局  
                    </option>  
                    <option value=http://www.hljmj.gov.cn />  
                        省煤礦安全監(jiān)察局  
                    </option>  
                    <option value=http://www.chinacoal.org.cn />  
 
                        中國煤炭工業(yè)網(wǎng)  
                    </option>  
                    <option value=http://www.triz.gov.cn />  
                        技術(shù)創(chuàng)新方法  
                    </option>  
                    <option value=http://www.cumt.edu.cn />  
                        中國礦業(yè)大學(xué)  
                    </option>  
                    <option value=http://www.triz.gov.cn />  
                        中國礦業(yè)大學(xué)北京校區(qū)  
                    </option>  
                </select>  
            </div>  
            <br />  
            <br />  
    </body>  
 
</html>

第四步：寫業(yè)務(wù)代碼

public void addMessage(int b_id,String m_content,String m_name)  
    {  
        PreparedStatement ps = null;  
        try 
        {  
            String sql = "insert into message(b_id,m_name,m_content,m_date,m_status) values(?,?,?,?,?)";   
            ps = DBUtils.getConnection().prepareStatement(sql);  
            ps.setInt(1,b_id);  
            ps.setString(2,m_content);  
            ps.setString(3,m_name );  
            ps.setDate(4, new Date(new java.util.Date().getTime()));  
            ps.setString(5, "1");  
            ps.executeUpdate();  
        }  
        catch (Exception e)  
        {  
            e.printStackTrace();  
        }  
        finally 
        {  
            DBUtils.close(ps);  
            DBUtils.close();  
        }  
          
    }

第五步：在action調(diào)用該方法:目的是將留言錄入數(shù)據(jù)庫

package com.ele.web.action.message;  
 
import java.io.BufferedInputStream;  
import java.io.BufferedOutputStream;  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.OutputStream;  
import java.io.PrintWriter;  
import java.text.DateFormat;  
import java.text.SimpleDateFormat;  
import java.sql.Date;  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletResponse;  
 
import org.apache.struts2.ServletActionContext;  
 
import com.ele.services.MessageServices;  
import com.ele.services.NewsServices;  
import com.ele.vo.Ele_messageVO;  
import com.ele.vo.Ele_newsVO;  
import com.opensymphony.xwork2.ActionContext;  
import com.opensymphony.xwork2.ActionSupport;  
 
public class AddMessageAction extends ActionSupport  
{  
    private String m_name;  
      
    private String m_content;  
      
    private int b_id;  
      
    public int getB_id()  
    {  
        return b_id;  
    }  
 
    public void setB_id(int bId)  
    {  
        b_id = bId;  
    }  
 
    public String getM_name()  
    {  
        return m_name;  
    }  
 
    public void setM_name(String mName)  
    {  
        m_name = mName;  
    }  
 
    public String getM_content()  
    {  
        return m_content;  
    }  
 
    public void setM_content(String mContent)  
    {  
        m_content = mContent;  
    }  
      
    @Override 
    public String execute()  
    {  
 
        MessageServices msgServices = new MessageServices();  
        msgServices.addMessage(b_id, m_content, m_name);  
                return SUCCESS;  
    }  
      
}