menudao.java

Java企业级开发项目实践,这是他的附光盘

//---------------------------------------------------------
// Application: Portal of Enterprice
// Author     : eSingle
// File       : MenuDAO.java
//
// Copyright 2002 LandSoft Corp.
// Generated at Mon Nov 18 19:57:10 CST 2002
// Created by caoguangxin
// mailto:[e-mail]
//---------------------------------------------------------

package com.landsoft.portal.managent.dao;

import java.io.*;
import java.sql.*;
import java.util.*;
import javax.sql.*;

import com.landsoft.portal.managent.model.*;
import com.landsoft.portal.managent.util.CacheManager;

public class MenuDAO
    extends DAO {

  public MenuDAO(DataSource ds) {
    super(ds);
  }

  public void insert(Menu menu) throws SQLException {
    String sql;
    sql = "INSERT INTO menu (menuname, systemname) VALUES (?, ?)";
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
      conn = ds.getConnection();
      pstmt = conn.prepareStatement(sql);
      pstmt.setString(1, menu.getMenuname());
      pstmt.setString(2, menu.getSystemname());
      pstmt.executeUpdate();
      pstmt.close();
      conn.commit();
    }
    catch (SQLException sqle) {
      close(rs);
      close(pstmt);
      rollback(conn);
      sqle.printStackTrace();
      throw sqle;
    }
    finally {
      close(conn);
    }
  }

  public void update(Menu menu) throws SQLException {
    Connection conn = null;
    PreparedStatement pstmt = null;
    try {
      conn = ds.getConnection();
      String sql = "UPDATE menu SET  WHERE menuname=? AND systemname=?";
      pstmt = conn.prepareStatement(sql);
      pstmt.setString(1, menu.getMenuname());
      pstmt.setString(2, menu.getSystemname());
      pstmt.executeUpdate();
      close(pstmt);
      conn.commit();
    }
    catch (SQLException e) {
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }
  }

  public void delete(String menuname, String systemname) throws SQLException {
    Connection conn = null;
    PreparedStatement pstmt = null;
    try {
      conn = ds.getConnection();
      String sql = "DELETE FROM menu WHERE menuname=? AND systemname=?";
      pstmt = conn.prepareStatement(sql);
      pstmt.setString(1, menuname);
      pstmt.setString(2, systemname);
      pstmt.executeUpdate();
      close(pstmt);
      conn.commit();
    }
    catch (SQLException e) {
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }
    String[] objKeys = {
        "Menu", String.valueOf(menuname), String.valueOf(systemname)};
    String objKey = CacheManager.createKey(objKeys);
    DAOCacheManager.invalidate(objKey);
  }

  public Menu retrieve(String menuname, String systemname) throws SQLException {
    String[] objKeys = {
        "Menu", String.valueOf(menuname), String.valueOf(systemname)};
    String objKey = CacheManager.createKey(objKeys);
    Menu menu = (Menu) DAOCacheManager.getCache(objKey);
    if (menu != null) {
      return menu;
    }
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
      conn = ds.getConnection();
      String sql = "SELECT * FROM menu WHERE menuname=? AND systemname=?";
      pstmt = conn.prepareStatement(sql);
      pstmt.setString(1, menuname);
      pstmt.setString(2, systemname);
      rs = pstmt.executeQuery();
      if (rs.next()) {
        menu = new Menu();
        menu.setMenuname(rs.getString(1));
        menu.setSystemname(rs.getString(2));
        populate(menu, rs);
      }
      close(rs);
      close(pstmt);
    }
    catch (SQLException e) {
      close(rs);
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }
    DAOCacheManager.putCache(menu, objKey, 1);
    return menu;
  }

  public List all() throws SQLException {
    ArrayList list = new ArrayList();
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
      conn = ds.getConnection();
      String sql = "SELECT menuname, systemname FROM menu";
      pstmt = conn.prepareStatement(sql);
      rs = pstmt.executeQuery();
      while (rs.next()) {
        Menu menu = new Menu();
        menu.setMenuname(rs.getString(1));
        menu.setSystemname(rs.getString(2));
        populate(menu, rs);
        list.add(menu);

      }
      close(rs);
      close(pstmt);
    }
    catch (SQLException e) {
      close(rs);
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }

    return list;
  }

  public List list() throws SQLException {
    String[] objKeys = {
        "Menu", "list"};
    String objKey = CacheManager.createKey(objKeys);
    ArrayList list = (ArrayList) DAOCacheManager.getCache(objKey);
    if (list != null) {
      return list;
    }
    list = new ArrayList();
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
      conn = ds.getConnection();
      String sql = "SELECT menuname, systemname FROM menu";
      pstmt = conn.prepareStatement(sql);
      rs = pstmt.executeQuery();
      while (rs.next()) {
        Menu menu = new Menu();
        menu.setMenuname(rs.getString(1));
        menu.setSystemname(rs.getString(2));
        populate(menu, rs);
        list.add(menu);
      }
      close(rs);
      close(pstmt);
    }
    catch (SQLException e) {
      close(rs);
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }
    DAOCacheManager.putCache(list, objKey, 1);
    return list;
  }

  public List list(int offset, int limit) throws SQLException {
    String[] objKeys = {
        "Menu", "list", String.valueOf(offset), String.valueOf(limit)};
    String objKey = CacheManager.createKey(objKeys);
    ArrayList list = (ArrayList) DAOCacheManager.getCache(objKey);
    if (list != null) {
      return list;
    }
    list = new ArrayList();
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
      conn = ds.getConnection();
      String sql = "SELECT menuname, systemname FROM menu";
      pstmt = conn.prepareStatement(sql);
      rs = pstmt.executeQuery();
      if (offset > 0) {
        rs.absolute(offset);
      }
      int recCount = 0;
      while ( (recCount++ < limit) && rs.next()) {
        Menu menu = new Menu();
        menu.setMenuname(rs.getString(1));
        menu.setSystemname(rs.getString(2));
        populate(menu, rs);
        list.add(menu);
      }
      close(rs);
      close(pstmt);
    }
    catch (SQLException e) {
      close(rs);
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    }
    finally {
      close(conn);
    }
    DAOCacheManager.putCache(list, objKey, 1);
    return list;
  }

}