新闻发布项目——数据实现类（UserDaoImpl）

package bdqn.newsMange.Dao.Impl;

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

import bdqn.newsMange.Dao.BaseDao;
import bdqn.newsMange.Dao.UserDao;
import bdqn.newsMange.entity.User;

public class UserDaoImpl extends BaseDao implements UserDao {

	//查询全部
	public List<User> getAllUesr() {
		// TODO Auto-generated method stub
		List<User> userlist=new ArrayList<User>();
		String sql="select userId,userName,userPassword,uRole from [users]";
		try {
			ResultSet rs=executeQurey(sql, null);
			while(rs.next()){
				User user=new User();
				user.setUserId(rs.getInt(1));
				user.setUserName(rs.getString(2));
				user.setUserPassword(rs.getString(3));
				user.setuRole(rs.getString(4));
				userlist.add(user);
			}
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			closeAll();
		}
		return userlist;
	}

	//添加（注册）
	public int addUser(User user) {
		int rel=0;
		String sql="insert users (userName,userPassword,uRole)values(?,?,'普通用户')";
		List<Object>prams=new ArrayList<Object>();
		//User use=new User();
		prams.add(user.getUserName());
		prams.add(user.getUserPassword());
		try {
			rel=executeUpdate(sql, prams);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			closeAll();
		}
		return rel;
	}

	public int updateUser(User user) {
		int rel=0;
		String sql="update users set userName=?,userPassword=?,uRole=? where userID=? ";
		List<Object> prams=new ArrayList<Object>();
		User use=new User();
		use.setUserName(user.getUserName());
		use.setUserPassword(user.getUserPassword());
		use.setuRole(user.getuRole());
		prams.add(use);
		try {
			rel=executeUpdate(sql, prams);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			closeAll();
		}
		
		return rel;
	}

	public int delUser(int userId) {
		int rel=0;
		String sql="delete from users where userID=0";
		List<Object> prams=new ArrayList<Object>();
		User use=new User();
		use.setUserId(userId);
		try {
			rel=executeUpdate(sql, prams);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			closeAll();
		}
		return rel;
	}

	public User getLoginUser(String uName) {
		String sql="select userId,userName,userPassword,uRole from users where userName=?";
		User user=null;
		List<Object> prams=new ArrayList<Object>();
		prams.add(uName);
		try {
			ResultSet rs=executeQurey(sql, prams);
			if(rs.next()){
				user=new User();
				user.setUserName(rs.getString("userName"));
				user.setUserPassword(rs.getString("userPassword"));
				user.setUserId(rs.getInt("userId"));
				user.setuRole(rs.getString("uRole"));
			}
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		return user;
	}

}