zhutiedao.java

简单的BBS系统

package com.zjy.struts.mypackage;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import com.zjy.struts.form.ZhutieForm;

public class ZhutieDao {
	public Connection con = null;

	public PreparedStatement ps = null;
	public Statement stmt = null;

	public ResultSet rs = null;
	public ZhutieDao() {
		try {
			Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver")
					.newInstance();
			String url = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=luntan";
			String user = "sa";
			String password = "";
			con = DriverManager.getConnection(url, user, password);
		} catch (Exception e) {
			// TODO: handle exception
		}
	}
	public ZhutieForm setZhutie(int id){
		//List list=new ArrayList();
		ZhutieForm zf=new ZhutieForm();
		try {
			stmt=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
			String sql="select * from zhutie where id="+id;
			rs=stmt.executeQuery(sql);
			rs.next();
			zf.setId(id);
			zf.setName(rs.getString(2));
			zf.setTitle(rs.getString(3));
			zf.setText(huanhang(rs.getString(4)));
			zf.setTimes(rs.getString(5));
			int chick=rs.getInt(6);
			chicks(id,chick);
			//list.add(zf);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				rs.close();
				stmt.close();
				con.close();
			} catch (Exception e) {
				// TODO: handle exception
			}
		}
		
		return zf;
	}
	public int insertZhutie(ZhutieForm zhutieForm) {
		Date t = new Date();
		String ts = t.toLocaleString();
		int chicks=0;
		int rs=0;
		try {
			ps = con
					.prepareStatement("insert into zhutie(name, title, text, times, chicks) values(?,?,?,?,?)");
			ps.setString(1, bx(zhutieForm.getName()));
			ps.setString(2, bx(zhutieForm.getTitle()));
			ps.setString(3, bx(zhutieForm.getText()));
			ps.setString(4, ts);
			ps.setInt(5, chicks);
			rs=ps.executeUpdate();
		} catch (Exception e) {
			System.out.println(e);
			rs=0;
		}finally{
			try {
				ps.close();
				stmt.close();
				con.close();
			} catch (Exception e) {
				// TODO: handle exception
			}
		}
         return rs;
	}
	public int deleteZhutie(String id){
		int rst=0;
		try {
			int ids=Integer.parseInt(id);
			stmt=con.createStatement();
			String sql="delete  from zhutie where id="+ids;
			rst=stmt.executeUpdate(sql);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				stmt.close();
			} catch (Exception e) {
				// TODO: handle exception
				System.out.println(e);
			}
		}
		return rst;
	}
	public void chicks(int id,int chick){
		try {
			chick=chick+1;
			stmt=con.createStatement();
			String sql="update zhutie set chicks="+chick+" where id="+id;
			stmt.executeUpdate(sql);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	public String huanhang(String s){//换行
		s = s.replace("\r\n", "<br>");
		return s;
	}
	public String bx(String s) {
		try {
			byte b[] = s.getBytes("iso-8859-1");
			s = new String(b);
		} catch (Exception e) {
		}
		return s;
	}

}