通过java代码如何实现对mysql数据库进行创建新的数据库的操作

最好有代码
2024-12-25 17:27:47
推荐回答(2个)
回答1:

1 import java.sql.Connection;
  2 import java.sql.DriverManager;
  3 import java.sql.ResultSet;
  4 import java.sql.SQLException;
  5 import java.sql.Statement;
  6
  7 public class CreateDataSource {
  8
  9 /**
  10 * @param args
  11 */
  12 public static void main(String[] args) {
  13 // TODO Auto-generated method stub
  14 String database = "test2";
  15 new CreateDataSource().getConn(database);
  16 }
  17
  18 String mysqlDriver = "com.mysql.jdbc.Driver";
  19 String url = "jdbc:mysql://localhost:3306/test1";
  20 String newUrl = "jdbc:mysql://localhost:3306/";
  21 String username = "root";
  22 String password = "root";
  23 Connection conn = null;
  24 Connection newConn = null;
  25
  26 public Connection getConn(String database) {
  27
  28 try {
  29 Class.forName(mysqlDriver);
  30 } catch (ClassNotFoundException e) {
  31 // TODO Auto-generated catch block
  32 e.printStackTrace();
  33 }
  34 try {
  35 String tableSql = "create table t_user (username varchar(50) not null primary key,"
  36 + "password varchar(20) not null ); ";
  37 String databaseSql = "create database " + database;
  38
  39 conn = DriverManager.getConnection(url, username, password);
  40 Statement smt = conn.createStatement();
  41 if (conn != null) {
  42 System.out.println("数据库连接成功!");
  43
  44 smt.executeUpdate(databaseSql);
  45
  46 newConn = DriverManager.getConnection(newUrl + database,
  47 username, password);
  48 if (newConn != null) {
  49 System.out.println("已经连接到新创建的数据库:" + database);
  50
  51 Statement newSmt = newConn.createStatement();
  52 int i = newSmt.executeUpdate(tableSql);//DDL语句返回值为0;
  53 if (i == 0) {
  54 System.out.println(tableSql + "表已经创建成功!");
  55 }
  56 }
  57 }
  58
  59 } catch (SQLException e1) {
  60 // TODO Auto-generated catch block
  61 e1.printStackTrace();
  62 }
  63 return conn;
  64 }
  65 }

回答2:

使用Statement 或PreparedStatement去执行SQL。。。。。。
CREATE DATABASE test1234