deptdao.java

这个是基于Struts的人事管理系统

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

package com.landsoft.personal.dao;

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

import com.landsoft.personal.model.*;
import com.landsoft.personal.util.CacheManager;

public class DeptDAO extends DAO {

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

  public void insert(Dept dept) throws SQLException {
    String sql;
    sql = "INSERT INTO dept (deptname) VALUES (?)";
    Connection conn = null;
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
      conn = ds.getConnection();
      pstmt = conn.prepareStatement(sql);
      pstmt.setString(1, dept.getDeptname());
      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(Dept dept) throws SQLException {
  	Connection conn = null;
  	PreparedStatement pstmt = null;
    try {
      conn = ds.getConnection();
      String sql = "UPDATE dept SET  WHERE deptname=?";
      pstmt = conn.prepareStatement(sql);
      pstmt.setString(1, dept.getDeptname());
      pstmt.executeUpdate();
      close(pstmt);
      conn.commit();
    } catch (SQLException e) {
      close(pstmt);
      rollback(conn);
      e.printStackTrace();
    } finally {
    	close(conn);
    }
  }

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

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

  public List list() throws SQLException {
    String[] objKeys = {"Dept", "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 deptname FROM dept";
      pstmt = conn.prepareStatement(sql);
      rs = pstmt.executeQuery();
      while(rs.next()) {
        Dept dept = new Dept();
        dept.setDeptname(rs.getString(1));
        populate(dept, rs);
        list.add(dept);
      }
      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 = {"Dept", "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 deptname FROM dept";
      pstmt = conn.prepareStatement(sql);
      rs = pstmt.executeQuery();
      if(offset > 0) rs.absolute(offset);
      int recCount = 0;
      while((recCount++ < limit) && rs.next()) {
        Dept dept = new Dept();
        dept.setDeptname(rs.getString(1));
        populate(dept, rs);
        list.add(dept);
      }
      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;
  }

}