listaction.java

来自「用户能添加 查看 新闻内容 并能够修改新闻内容~」· Java 代码 · 共 65 行

package news.action;

import news.db.*;
import news.form.*;
import java.sql.*;
import java.util.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;


public class ListAction extends Action{
	
 public ActionForward execute(ActionMapping mapping,ActionForm form,
        	HttpServletRequest request,HttpServletResponse response)
        	throws Exception 
    {	
   
    	String target = "list";
    	PageForm pageBean = (PageForm)form;
    	    	 
        Connection con = null;
		try{
			con=DatabaseConnection.getCon();
			Statement st = con.createStatement();
			
			String q1 = "SELECT COUNT(*) AS total FROM news";
			ResultSet rs1 = st.executeQuery(q1);
			int total = 0;
			if(rs1.next()){
				total = rs1.getInt("total");
			}

			pageBean.setMaxRowCount(total);
			pageBean.setMaxPage();			
			
			int num = pageBean.getRowsPerPage();
			int start = (pageBean.getCurPage()-1)*num;		
			String q2="SELECT * FROM news ORDER BY id DESC LIMIT "+start+","+num;
			ResultSet rs2 = st.executeQuery(q2);
			Vector v = new Vector();
			News news;	
			while(rs2.next()){							
					news = new News();
				news.setTitle(rs2.getString("title"));
				news.setAuthor(rs2.getString("author"));
				news.setContent(rs2.getString("content"));
				news.setPubtime(rs2.getDate("pubtime"));
			  v.add(news);
			}
			pageBean.setData(v);
		} catch(Exception e){		   
				   	e.printStackTrace();
					throw e;
		} finally{
			try{
				if(con!=null){
					con.close();
				}
			}catch(Exception e2){}
		}
		
		return (mapping.findForward("list"));
    }
	
}