SQL

package com.JDBCsql;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Properties;

public class TestMysql {
       private static String DRIVER=null;
       private static String URL=null;
       private static  String USERNAME = null;       
          private static  String PASSWORD = null;
       static{
        try {
            FileInputStream fis 
            = new FileInputStream("src/db.properties");
            Properties pt = new Properties();
            pt.load(fis);
            DRIVER = pt.getProperty("DRIVER");
            URL = pt.getProperty("URL");
            USERNAME = pt.getProperty("USERNAME");
            PASSWORD = pt.getProperty("PASSWORD");
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
       public static Connection getConn(){
        Connection conn=null;
        try {
            /*��������*/
//            System.out.println(DRIVER);
            Class.forName(DRIVER);
            /*�������ݿ�*/
            conn= DriverManager.getConnection(URL, USERNAME, PASSWORD);
            
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return conn;
    }
    //�ر�����
    public static void close(Connection conn){
        try {
            conn.close();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
    //�ر�����
    public static void close(PreparedStatement ps){
        try {
            ps.close();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
    //�ر�����
    public static void close(ResultSet rs){
        try {
            rs.close();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
    
    
    public static int executeUpdate(String sql,Object... papram) {
        // TODO Auto-generated method stub
        Connection conn =getConn();
        int result=0;
        try {
            PreparedStatement pst = conn.prepareStatement(sql);
            if (papram!=null) {
                for (int i = 0; i < papram.length; i++) {
                    pst.setObject(i+1, papram[i]);
                }
            }
            result =pst.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally {
            close(conn);
        }
        return result;

    }
    
}

public static int delete(int id){
		return TestMysql.executeUpdate("delete from user where id=?",id);
		
	}
	public static int update(TestUser testUser){
		return TestMysql.executeUpdate("update user set name=?,pasword=?,mail=?,root=? where id=?",testUser.getName(),testUser.getPasword(),testUser.getMail(),testUser.getRoot(),testUser.getId());
	}
	public static int update1(TestUser testUser){
		return TestMysql.executeUpdate("update user set name=?,pasword=?,mail=?where id=?",testUser.getName(),testUser.getPasword(),testUser.getMail(),testUser.getId());
	}
	public static int add(TestUser testUser){
		return TestMysql.executeUpdate("insert into user (name,pasword,mail,root) values (?,?,?,?)",testUser.getName(),testUser.getPasword(),testUser.getMail(),testUser.getRoot());
	}
	public static TestUser getUser(TestUser testUser){
		Connection conn = 	TestMysql.getConn();		
		TestUser testUser4 =new TestUser();
		ResultSet index ;//��¼����
		PreparedStatement pst = null;
		String sql =  "select * from user where name='"+testUser.getName()+"' and pasword='"+testUser.getPasword()+"'";		
		try {
			pst = conn.prepareStatement(sql);
			
			index = pst.executeQuery();
			if (index.next()==false) {
				return new TestUser();
			}
			else {
				testUser4.setId(index.getInt("id"));
				testUser4.setName(index.getString("name"));
				testUser4.setPasword(index.getInt("pasword"));
				testUser4.setMail(index.getString("mail"));
				testUser4.setRoot(index.getString("root"));
			}	
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			try {
				pst.close();
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			
		}
		return testUser4;	
	}