項目中有一個需求要動態創建數據庫並且要動態連接數據庫，本來以為還很難實現呢，在網上找了好久，都不是很理想，最后看到有人說創建數據庫時，先連接到任意一個數據庫，獲得連接后用createStatement（）語句創建自己的數據庫，自己試了一下，果然可以.動態連接數據庫就跟簡單了！下面是代碼，僅供參考！這些在jdbc里面實現的，如果是用hibernate的話，不知道怎么樣，我沒有試過！
package com.cn.javaEE.dataSource;
import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;
public class CreateDataSource {
/*** @param args*/public static void main(String[] args) { // TODO Auto-generated method stub String database = "test2"; new CreateDataSource().getConn(database);}
String mysqlDriver = "com.mysql.jdbc.Driver";String url = "jdbc:mysql://localhost:3306/test1";String newUrl = "jdbc:mysql://localhost:3306/";String username = "root";String password = "root";Connection conn = null;Connection newConn = null;
public Connection getConn(String database) {
try { Class.forName(mysqlDriver); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } try { String tableSql = "create table t_user (username varchar(50) not null primary key," + "password varchar(20) not null ); "; String databaseSql = "create database " + database;
conn = DriverManager.getConnection(url, username, password); Statement smt = conn.createStatement(); if (conn != null) { System.out.println("數據庫連接成功！");
smt.executeUpdate(databaseSql);
newConn = DriverManager.getConnection(newUrl + database, username, password); if (newConn != null) { System.out.println("已經連接到新創建的數據庫：" + database);
Statement newSmt = newConn.createStatement(); int i = newSmt.executeUpdate(tableSql);//DDL語句返回值為0; if (i == 0) { System.out.println(tableSql + "表已經創建成功！"); } } }
} catch (SQLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } return conn;}}