自己封裝的數據源（支持多種數據庫訪問，內部實現線程池 基於bonecp）

一個簡簡單的數據訪問封裝，有錯誤的地方希望大家給我留言共同提高，源碼下載鏈接（jar 包）

http://download.csdn.net/detail/u011658193/8675403

package com.xiaojia.database.dao;

import com.xiaojia.database.Connection;


public class BaseDao  extends Connection {

    /**
     * 此類描述 繼承Connection 實現數據源
     */

    static{
        /**
         * 第一個參數，路徑
         * 第二個參數，用戶名
         * 第三個參數，密碼（沒有寫空）
         * 第四個參數，驅動（支持多數據庫）
         */
        init("jdbc:mysql://127.0.0.1:3306/test", "root", "","com.mysql.jdbc.Driver");
        //setDriverClass("com.mysql.jdbc.Driver");
    }
}

package com.xiaojia.database.dao;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.xiaojia.database.ResultSetHandler;
import com.xiaojia.database.model.User;


public class UserDao extends BaseDao {

    // 單例
    private static UserDao instance = new UserDao();

    public static UserDao getInstance() {
        return instance;
    }

    private UserDao(){};

    // 添加
    private String addUser_sql = "insert into t_user(phonenum,password) values(?,?)";

    public boolean addUser(User user) throws SQLException {
        boolean result = super.addObject(addUser_sql, new Object[]{user.getPhonenum(),user.getPassword()});
        return result;
    }

    // 修改
    private String updUser_sql = "update t_user set phonenum=? where id=?";

    public boolean updateUser(User user) throws SQLException {
        boolean result = super.updateObject(updUser_sql, new Object[]{user.getPhonenum(),user.getUid()});
        return result;
    }

    // 刪除
    private String delUser_sql = "delete from t_user where id=?";

    public boolean delUser(int uid) throws SQLException {
        return super.deleteObject(delUser_sql,new Object[]{uid});
    }

    private String listUser_sql = "select * from t_user";

    // 列表
    public List<User> listUser() throws SQLException {
        return super.get(listUser_sql, new ResultSetHandler<List<User>>() {

            List<User> userArray = new ArrayList<User>();

            @Override
            public List<User> handle(ResultSet rs) throws SQLException {
                while(rs.next()) {
                    User user = new User();
                    user.setCreatetime(rs.getString("createtime"));
                    user.setPassword(rs.getString("password"));
                    user.setPhonenum(rs.getString("phonenum"));
                    userArray.add(user);
                }
                return userArray;
            }
        });
    }
}

package com.xiaojia.database.model;


import java.io.Serializable;

public class User implements Serializable {

    private static final long serialVersionUID = 2942802677651309244L;

    private String uid;
    private String phonenum;
    private String password;
    private String createtime;
    private String status;


    public String getUid() {
        return uid;
    }
    public void setUid(String uid) {
        this.uid = uid;
    }
    public String getPhonenum() {
        return phonenum;
    }
    public void setPhonenum(String phonenum) {
        this.phonenum = phonenum;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getCreatetime() {
        return createtime;
    }
    public void setCreatetime(String createtime) {
        this.createtime = createtime;
    }
    public String getStatus() {
        return status;
    }
    public void setStatus(String status) {
        this.status = status;
    }
    @Override
    public String toString() {
        return "User [uid=" + uid + ", phonenum=" + phonenum + ", password="
                + password + ", createtime=" + createtime + ", status="
                + status + "]";
    }



}

package com.xiaojia.database.service;

import java.sql.SQLException;
import java.util.List;

import com.xiaojia.database.dao.UserDao;
import com.xiaojia.database.model.User;

public class UserServiceImpl {

    public boolean addUser(User user) {
        try {
            return UserDao.getInstance().addUser(user);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return false;
    }

    public boolean updateUser(User user) {
        try {
            return UserDao.getInstance().updateUser(user);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return false;
    }

    public boolean delUser(int uid) {
        try {
            return UserDao.getInstance().delUser(uid);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return false;
    }

    public List<User> listUser() {
        try {
            return UserDao.getInstance().listUser();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {
        User user = new User();

        UserServiceImpl ser = new UserServiceImpl();

//       user.setPhonenum("12121212");
//       user.setPassword("12121212");
//       ser.addUser(user);

//      user.setPhonenum("2323232323");
//      user.setUid("46");
//      ser.updateUser(user);
//      ser.delUser(45);
        System.out.println(ser.listUser().toString());
    }
}