jdbcutil 主要處理的是 連接數(shù)據(jù)庫， 和關(guān)閉各個(gè)流

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1， 數(shù)據(jù)庫連接的配置信息： mysql.properties (在工程的目錄下)個(gè)人配置

url=jdbc:mysql://localhost:3306/test driver=com.mysql.jdbc.Driver username=root password=123

2， 獲取連接

讀取配置信息，加載驅(qū)動(dòng)。連接。（這個(gè)在后面的例子常用到）

package com.ljs.util;

import java.io.File;
import java.io.FileInputStream;

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 JDBCUtil {private static String url;private static String user;private static String password;private static String driver;static{try {Properties properties = new Properties();FileInputStream fis = new FileInputStream(new File("mysql.properties"));properties.load(fis);url = properties.getProperty("url");user = properties.getProperty("username");password = properties.getProperty("password");driver = properties.getProperty("driver");Class.forName(driver);} catch (Exception e) {e.getMessage();}}public static Connection getConn() throws Exception{Connection connection = DriverManager.getConnection(url, user, password);return connection;}public static void close(ResultSet resultSet, PreparedStatement preparedStatement, Connection connection){try {if (resultSet != null) {resultSet.close();}if(preparedStatement != null ){preparedStatement.close();}if(connection != null ){connection.close();}} catch (SQLException e) {throw new RuntimeException();}}}

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轉(zhuǎn)載于:https://www.cnblogs.com/lijins/p/10122063.html

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