Bean+servlet+jsp显示数据库中的一组数据
2014-12-02 09:45
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从数据库中取一组数据放到Bean中：TeamBusiness.java
package business;
import java.sql.*;import java.util.ArrayList;import java.util.Collection;import database.DataSource;import bean.Team;
public class TeamBusiness{ public static void addTeam(Team team)throws Exception{ Connection cn=null; PreparedStatement pst=null; try{ cn=DataSource.getConnection(); pst=cn.prepareStatement("insert into team(name,slogan,leader) values(?,?,?)"); pst.setString(1, team.getName()); pst.setString(2, team.getSlogan()); pst.setString(3, team.getLeader()); pst.executeUpdate(); }catch(Exception e){ throw e; }finally{ try{ pst.close(); cn.close(); }catch(Exception e){ e.printStackTrace(); } } } public static Collection<Team> allTeams() throws Exception {
ArrayList<Team> teams = new ArrayList<Team>();// 创建集合对象
// 从数据库获取数据 Connection cn = null; PreparedStatement pst = null; ResultSet rs = null; try { cn = DataSource.getConnection(); pst = cn.prepareStatement("select * from team"); rs = pst.executeQuery();
while (rs.next()) { Team team = new Team();// 创建team对象 // 用数据库取得的数据设置team对象的属性 team.setId(rs.getInt("id")); team.setName(rs.getString("name")); team.setSlogan(rs.getString("slogan")); team.setLeader(rs.getString("leader"));
teams.add(team);// 把team对象放到集合teams中 } } catch (Exception e) { throw e; } finally { try { rs.close(); pst.close(); cn.close(); } catch (Exception e) { e.printStackTrace(); } }
return teams; }
}servlet接收数据并存入request供jsp调用：addTeam1.java/* * 通过mysql来查询表单数据并显示 */package servlet;
import java.io.*;import javax.servlet.*;import javax.servlet.http.*;import java.sql.*;import java.util.Collection;
import bean.Team;import business.TeamBusiness;
public class viewTeams1 extends HttpServlet{ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { Collection<Team> teams=TeamBusiness.allTeams(); request.setAttribute("teams", teams);
RequestDispatcher rd = request.getRequestDispatcher("../viewTeams.jsp"); rd.forward(request, response);
} catch (Exception e) { e.printStackTrace();
RequestDispatcher rd = request.getRequestDispatcher("../viewTeamsFail.jsp"); rd.forward(request, response); }} protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doGet(request, response); }}用jsp取request中的数据并显示：viewTeams.jsp<?xml version="1.0" encoding="GBK" ?><%@ page language="java" contentType="text/html; charset=GBK" import="java.util.*,bean.Team;" pageEncoding="GBK"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=GBK" /><title>Insert title here</title></head><body><table border="1" align="center"><tr><th>组名</th><th>口号</th><th>组长</th></tr><%Collection<Team> teams = (Collection<Team>)request.getAttribute("teams");Iterator<Team> it = teams.iterator();while(it.hasNext()) { Team team = it.next();%><tr><td><%=team.getName()%></td><td><%=team.getSlogan()%></td><td><%=team.getLeader()%></td></tr><%}%></table>
</body></html>
package business;
import java.sql.*;import java.util.ArrayList;import java.util.Collection;import database.DataSource;import bean.Team;
public class TeamBusiness{ public static void addTeam(Team team)throws Exception{ Connection cn=null; PreparedStatement pst=null; try{ cn=DataSource.getConnection(); pst=cn.prepareStatement("insert into team(name,slogan,leader) values(?,?,?)"); pst.setString(1, team.getName()); pst.setString(2, team.getSlogan()); pst.setString(3, team.getLeader()); pst.executeUpdate(); }catch(Exception e){ throw e; }finally{ try{ pst.close(); cn.close(); }catch(Exception e){ e.printStackTrace(); } } } public static Collection<Team> allTeams() throws Exception {
ArrayList<Team> teams = new ArrayList<Team>();// 创建集合对象
// 从数据库获取数据 Connection cn = null; PreparedStatement pst = null; ResultSet rs = null; try { cn = DataSource.getConnection(); pst = cn.prepareStatement("select * from team"); rs = pst.executeQuery();
while (rs.next()) { Team team = new Team();// 创建team对象 // 用数据库取得的数据设置team对象的属性 team.setId(rs.getInt("id")); team.setName(rs.getString("name")); team.setSlogan(rs.getString("slogan")); team.setLeader(rs.getString("leader"));
teams.add(team);// 把team对象放到集合teams中 } } catch (Exception e) { throw e; } finally { try { rs.close(); pst.close(); cn.close(); } catch (Exception e) { e.printStackTrace(); } }
return teams; }
}servlet接收数据并存入request供jsp调用：addTeam1.java/* * 通过mysql来查询表单数据并显示 */package servlet;
import java.io.*;import javax.servlet.*;import javax.servlet.http.*;import java.sql.*;import java.util.Collection;
import bean.Team;import business.TeamBusiness;
public class viewTeams1 extends HttpServlet{ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { Collection<Team> teams=TeamBusiness.allTeams(); request.setAttribute("teams", teams);
RequestDispatcher rd = request.getRequestDispatcher("../viewTeams.jsp"); rd.forward(request, response);
} catch (Exception e) { e.printStackTrace();
RequestDispatcher rd = request.getRequestDispatcher("../viewTeamsFail.jsp"); rd.forward(request, response); }} protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doGet(request, response); }}用jsp取request中的数据并显示：viewTeams.jsp<?xml version="1.0" encoding="GBK" ?><%@ page language="java" contentType="text/html; charset=GBK" import="java.util.*,bean.Team;" pageEncoding="GBK"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=GBK" /><title>Insert title here</title></head><body><table border="1" align="center"><tr><th>组名</th><th>口号</th><th>组长</th></tr><%Collection<Team> teams = (Collection<Team>)request.getAttribute("teams");Iterator<Team> it = teams.iterator();while(it.hasNext()) { Team team = it.next();%><tr><td><%=team.getName()%></td><td><%=team.getSlogan()%></td><td><%=team.getLeader()%></td></tr><%}%></table>
</body></html>
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