JDBC–MYSQLEclipse的连接以及简单的使用_MySQL
首先下载一个WAMP,附上网盘下载链接:
http://pan.baidu.com/s/1qW2Uzc4
WAMP的介绍这里就不说了吧,集成了Mysql数据库并且提供phpMyadmin,方便使用。
其次下载JDBC的驱动链接:
http://pan.baidu.com/s/1eQDylfO
最后的工具就是eclipse或者myeclipse这个网上搜下就可以,任意版本。Eclipse是免费的。
附:集成android开发环境ADT(ECLIPSE)
http://pan.baidu.com/s/1bn7yBNL
连接步骤如下:
1.首先打开phpMyadmin,创建数据库(可以手动也可以用SQL)
CREATE DATABASE test; //创建一个数据库
use test; //指定test为当前要操作的数据库
之后创建表:
CREATE TABLE user (nameVARCHAR(20),password VARCHAR(20));
//创建一个表user,设置两个字段。
插入数据:
INSERT INTO userVALUES('huzhiheng','123456'); //插入一条数据到表中
2.打开Eclipse,创建一个项目(my),
操作:右键项目点击my--->build Path--->add external Archiver...选择jdbc驱动,点击确定。
我的项目列表:
3.驱动已经导入,下面我们来写一个程序验证一下
import java.sql.*; public class MysqlJdbc { public static void main(String args[]) { try { Class.forName("com.mysql.jdbc.Driver"); //加载MYSQL JDBC驱动程序 //Class.forName("org.gjt.mm.mysql.Driver"); System.out.println("Success loading Mysql Driver!"); } catch (Exception e) { System.out.print("Error loading Mysql Driver!"); e.printStackTrace(); } try { Connection connect = DriverManager.getConnection( "jdbc:mysql://localhost:3306/test","root",""); //连接URL为 jdbc:mysql//服务器地址/数据库名 ,后面的2个参数分别是登陆用户名和密码,起始密码一般为空 System.out.println("Success connect Mysql server!"); Statement stmt = connect.createStatement(); ResultSet rs = stmt.executeQuery("select * from user"); //user 为你表的名称 while (rs.next()) { System.out.println(rs.getString("name")); } } catch (Exception e) { System.out.print("get data error!"); e.printStackTrace(); } } }
可以看到输出结果:
Success loading Mysql Driver!
Success connect Mysql server!
huzhiheng
即连接成功。
至于JDBC的插入数据、查询数据、删除数据详细见如下代码:
Add: JDBC_Add(String name,String character,String introduce) throws SQLException{ Connection conn = null; Statement st = null; String sql ="insert into game(gamename,gamecharacter,gameintroduce)" + "VALUES('" + name + "','" + character + "','" + introduce +"')"; conn = DriverManager.getConnection(DBURL,DBUSER,""); st = conn.createStatement(); st.executeUpdate(sql); st.close(); conn.close(); }
DEL: JDBC_DEL(String name) throws SQLException{ Connection conn = null; Statement st = null; String sql ="DELETE FROM game WHERE gamename ='" +name+"'"; //NAME是String类型所以应该加引号 conn = DriverManager.getConnection(DBURL,DBUSER,""); st = conn.createStatement(); st.executeUpdate(sql); st.close(); conn.close(); }
SEL: JDBC_SEL(String name,JLabel showname,JLabel character,JLabel introduce) throws SQLException { Connection conn = null; Statement st = null; ResultSet rs = null; String sql ="SELECT gamename,gamecharacter,gameintroduce from game WHERE gamename ='" + name + "'"; conn = DriverManager.getConnection(DBURL,DBUSER,""); st = conn.createStatement(); rs = st.executeQuery(sql); while(rs.next()){ showname.setText(rs.getString("gamename")); character.setText(rs.getString("gamecharacter")); introduce.setText(rs.getString("gameintroduce")); } rs.close(); st.close(); conn.close(); }
UPD: public class JDBC_UPD { private static final String DBDRIVER = "org.gjt.mm.mysql.Driver"; private static final String DBURL = "jdbc:mysql://localhost:3306/mysql"; private static final String DBUSER = "root"; JDBC_UPD(String name,String character,String introduce) throws SQLException{ Connection conn = null; Statement st = null; String sql ="UPDATE game SET gamename = '" + name + "',gamecharacter='" + character +"',gameintroduce='"+ introduce + "' WHERE gamename ='" + name + "'"; //重写N次 conn = DriverManager.getConnection(DBURL,DBUSER,""); st = conn.createStatement(); st.executeUpdate(sql); st.close(); conn.close(); }
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