JDBCUtil模板

package com.utils;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ResourceBundle;

public class JdbcUtil {

    private static String user;
    private static String url;
    private static String password;
    private static String driverClassName;

    static {
        ResourceBundle rb = ResourceBundle.getBundle("database");//database是database的基名，去掉后缀，所在src目录下的路径
        driverClassName = rb.getString("driverClassName");
        user = rb.getString("user");
        url = rb.getString("url");
        password = rb.getString("password");

        try {
            Class.forName(driverClassName);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }

    }

    /** * 取得Connection */
    public static Connection getConnection() throws SQLException {
        Connection conn = DriverManager.getConnection(url, user, password);
        return conn;
    }

    /** * 关闭流 * * @param conn * @param rs * @param stmt */
    public static void release(Connection conn, ResultSet rs, Statement stmt) {

        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            rs = null;
        }
        if (stmt != null) {
            try {
                stmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            stmt = null;
        }
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            conn = null;
        }
    }

}