java连接mysql数据库

在连接之前先要导入mysql-connector-java-5.1.21-bin.jar

package com.student.dbc ;
import java.sql.* ;
public class DatabaseConnection {
    private static final String DBDRIVER = "org.gjt.mm.mysql.Driver" ;//mysql驱动
     private static final String DBURL = "jdbc:mysql://localhost:3306/java_web?useUnicode=true&characterEncoding=UTF-8" ;//数据库地址
    private static final String DBUSER = "root" ;//数据库用户名
    private static final String DBPASSWORD = "root" ;//数据库密码
    private Connection conn = null ;
    public DatabaseConnection() throws Exception{
        try{
            Class.forName(DBDRIVER) ;
            this.conn = DriverManager.getConnection(DBURL,DBUSER,DBPASSWORD) ;
        }catch(Exception e){
            throw e ;
        }
    }
    public Connection getConnection(){
        return this.conn ;
    }
    public void close() throws Exception{
        if(this.conn != null){
            try{
                this.conn.close() ;
            }catch(Exception e){
                throw e ;
            }
        }
    }
}