//可以參考下JDBC連接數(shù)據(jù)庫，下面是代碼文件，可以參考一下：
package?cn.zhangyitian.jdbcmysql;

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

public?class?JDBCToMySQL?{
????public?static?void?main(String[]?args)?{
????????String?driver?=?"com.mysql.jdbc.Driver";//導(dǎo)入包：mysql-connector-java-5.1.7-bin.jar
????????String?dbName?=?"填寫數(shù)據(jù)庫名";
????????String?passwrod?=?"填寫數(shù)據(jù)庫登陸密碼";
????????String?userName?=?"填寫數(shù)據(jù)庫登陸用戶名";
????????/*
?????????*?提供JDBC連接的URL
?????????*?書寫形式：協(xié)議：子協(xié)議：數(shù)據(jù)源標(biāo)識(shí)
?????????*/
????????String?url?=?"jdbc:mysql://ip地址(本地為localhost):3306/"?+?dbName;
????????String?sql?=?"填寫你需要使用的sql語句，進(jìn)行測試";
?
????????try?{
????????	/*
????????	?*?加載JDBC驅(qū)動(dòng)程序：
????????	?*?在連接數(shù)據(jù)庫之前，首先要加載想要連接的數(shù)據(jù)庫的驅(qū)動(dòng)到JVM，
????????	?*?這通過java.lang.Class類的靜態(tài)方法forName(String?className)
????????	?*?加載成功后，會(huì)將Driver類的實(shí)例注冊(cè)到DriverManager類中
????????	?*/
????????????Class.forName(driver);
???????????/*
????????????*?創(chuàng)建數(shù)據(jù)庫連接
????????????*/
????????????Connection?conn?=?DriverManager.getConnection(url,?userName,?passwrod);
????????????/*
?????????????*?執(zhí)行SQL語句
?????????????*?Statement接口提供三種SQL語句的方法:executeQuery,executeUpdate,execute
?????????????*?ResultSet?executeQuery(String?sqlString):執(zhí)行查詢數(shù)據(jù)庫的SQL語句，返回一個(gè)結(jié)果集（ResultSet）
?????????????*?int?executeUpdate(String?sqlString):用于執(zhí)行INSERT,UPDATE,DELETE語句以及SQL,DDL語句，如:CREATE?TABLE和DROP?TABLE語句
?????????????*?execute(sqlString):用于執(zhí)行返回多個(gè)結(jié)果集，多個(gè)更新計(jì)數(shù)或二者組合的語句
?????????????*/
????????????PreparedStatement?ps?=?conn.prepareStatement(sql);
????????????/*
?????????????*?ResultSet包含符合SQL語句中條件的左右行，并且它通過一套get方法對(duì)這些行數(shù)據(jù)的訪問
?????????????*/
????????????ResultSet?rs?=?ps.executeQuery();
????????????//使用結(jié)果集（ResultSet）對(duì)象的訪問方法獲取數(shù)據(jù)
????????????while?(rs.next())?{
????????????????System.out.println("cityCode?:?"?+?rs.getString("citycode")?+?"?cityName?:?"
????????????????????????+?rs.getString("cityname"));
????????????}
?
????????????/*
?????????????*?關(guān)閉JDBC對(duì)象
?????????????*?操作完成以后要把所有使用的JDBC對(duì)象全部關(guān)閉，以釋放JDBC資源，關(guān)閉順序和聲明順序相反
?????????????*/
????????????//?關(guān)閉記錄集
????????????if?(rs?!=?null)?{
????????????????try?{
????????????????????rs.close();
????????????????}?catch?(SQLException?e)?{
????????????????????e.printStackTrace();
????????????????}
????????????}
?
????????????//?關(guān)閉聲明
????????????if?(ps?!=?null)?{
????????????????try?{
????????????????????ps.close();
????????????????}?catch?(SQLException?e)?{
????????????????????e.printStackTrace();
????????????????}
????????????}
?
????????????//?關(guān)閉鏈接對(duì)象
????????????if?(conn?!=?null)?{
????????????????try?{
????????????????????conn.close();
????????????????}?catch?(SQLException?e)?{
????????????????????e.printStackTrace();
????????????????}
????????????}
?
????????}?catch?(Exception?e)?{
????????????e.printStackTrace();
????????}
????}
?
}