package cn.user.util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class BaseDao {

    private final String DRIVER="com.mysql.jdbc.Driver";
    private final String URL= "jdbc:mysql://localhost:3306/users";
    private final String USERNAME = "root";
    private final String PWD = "mysql";



    private Connection connection;
    private PreparedStatement ps;
    protected ResultSet rs;

    public Connection getConnection(){
        try {
            Class.forName(DRIVER);
            // 2在网络中查找数据库，创建连接对象
            connection = DriverManager.getConnection(
                    URL, USERNAME,PWD);
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return connection;
    }

    public void closeAll(){
        try {
            // 释放资源
            if (rs != null)
                rs.close();
            if (ps != null)
                ps.close();
            if (connection != null)
                connection.close();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    /**
     * 查询
     * @param sql
     * @param params
     */
    public void executeQuery(String sql , Object[] params){
        try {
            getConnection();
            ps = connection.prepareStatement(sql);
            if(params!= null){
                for (int i = 0; i < params.length; i++) {
                    ps.setObject(i+1, params[i]);
                }
            }

            rs = ps.executeQuery();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    /**
     * 查询
     * @param sql
     * @param params
     */
    public void executeQuery1(String sql , Object... params){
        try {
            getConnection();
            ps = connection.prepareStatement(sql);
            if(params!= null){
                for (int i = 0; i < params.length; i++) {
                    ps.setObject(i+1, params[i]);
                }
            }

            rs = ps.executeQuery();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * 增、删、改
     * @param sql
     * @param params
     * @return
     */
    public int executeUpdate(String sql , Object[] params){
        int result = -1;
        try {
            getConnection();
            ps = connection.prepareStatement(sql);
            if(params!= null){
                for (int i = 0; i < params.length; i++) {
                    ps.setObject(i+1, params[i]);
                }
            }

            result= ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }finally{

            this.closeAll();

        }
        return result;
    }


    /**
     * 增、删、改
     * @param sql
     * @param params
     * @return
     */
    public int executeUpdate1(String sql , Object... params){
        int result = -1;
        try {
            getConnection();
            ps = connection.prepareStatement(sql);
            if(params!= null){
                for (int i = 0; i < params.length; i++) {
                    ps.setObject(i+1, params[i]);
                }
            }

            result= ps.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{

            this.closeAll();

        }
        return result;
    }
    public ResultSet executeQueryRs(String sql , Object[] params){
        ResultSet rs = null;
        try {
            getConnection();
            ps = connection.prepareStatement(sql);
            if(params!= null){
                for (int i = 0; i < params.length; i++) {
                    ps.setObject(i+1, params[i]);
                }
            }

            rs = ps.executeQuery();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return rs;
    }
}