noteimpl.java

来自「jsp+servlet网上购物,是一个实现mvc的网站」· Java 代码 · 共 54 行

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package com.ebook.impl;
import java.util.*;
import java.sql.*;
import com.ebook.dao.*;
import com.ebook.Entity.*;
import java.text.SimpleDateFormat;
public class NoteImpl implements NoteDao {

    Connection con;

    public NoteImpl(Connection con) {
        this.con = con;
    }

    public ArrayList getNote() throws Exception {
        PreparedStatement pstm;
        ArrayList list = new ArrayList();
        String sql = "select * from note";
        pstm = con.prepareStatement(sql);
        ResultSet rs = pstm.executeQuery();
        while (rs.next()) {
            Note note = new Note();
            note.setUserid(rs.getInt("Noteid"));
            note.setUsername(rs.getString("Username"));
            note.setContent(rs.getString("Notecontent"));
            note.setTime(rs.getString("Notetime"));

            list.add(note);
        }
        return list;
    }
     public void addNote(Note note) throws Exception {
        PreparedStatement pstm;
        String sql = "insert into note(Userid,Username,Notecontent,Notetime) values(?,?,?,?)";
        pstm = con.prepareStatement(sql);
        pstm.setInt(1,note.getUserid());
        pstm.setString(2, note.getUsername());
        pstm.setString(3,note.getContent());
        pstm.setString(4,getDate());
        pstm.executeUpdate();
     }
        public String getDate() {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        String time = df.format(new java.util.Date());
        return time;
    }
   
}