本例以JDBC 和 MY SQL DataBase为基础,来演示执行SQL创建表,使用Statement和Prepared Statement两种方式。
一,示例代码
连接数据util:
MySqlJDBSUtil.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 package com.devnp.jdbc;import java.sql.Connection;import java.sql.DriverManager;import java.sql.SQLException;public class MySqlJDBSUtil { private static String driver = "com.mysql.jdbc.Driver" ; private static String url = "jdbc:mysql://127.0.0.1:3306/test?characterEncoding=utf8" ; private static String userName = "root" ; private static String password = "!qaz2wsx" ; public static Connection getConnection () { Connection connection = null ; try { Class.forName(driver); connection = DriverManager.getConnection(url, userName, password); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } return connection; } public static void connectionClose (Connection connection) { if (connection != null ) { try { connection.close(); } catch (SQLException e) { e.printStackTrace(); } } } }
JDBCCreateTable.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 package com.devnp.jdbc;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.SQLException;import java.sql.Statement;public class JDBCCreateTable { public static void main (String[] args) throws SQLException { createDbTableWithPreparedStatement(); } public static void createDbTableWithStatement () throws SQLException { Connection dbConnection = null ; Statement statement = null ; String createTableSQL = "CREATE TABLE USER_INFO(" + "USER_ID int(5) NOT NULL, " + "USERNAME VARCHAR(20) NOT NULL, " + "CREATED_BY VARCHAR(20) NOT NULL, " + "CREATED_DATE DATE NOT NULL, " + "PRIMARY KEY (USER_ID) " + ")" ; try { dbConnection = MySqlJDBSUtil.getConnection(); statement = dbConnection.createStatement(); System.out.println(createTableSQL); statement.execute(createTableSQL); System.out.println("Table \"USER_INFO\" is created!" ); } catch (SQLException e) { System.out.println(e.getMessage()); } finally { if (statement != null ) { statement.close(); } if (dbConnection != null ) { dbConnection.close(); } } } public static void createDbTableWithPreparedStatement () throws SQLException { Connection dbConnection = null ; PreparedStatement preparedStatement = null ; String createTableSQL = "CREATE TABLE USER_INFO(" + "USER_ID int(5) NOT NULL, " + "USERNAME VARCHAR(20) NOT NULL, " + "CREATED_BY VARCHAR(20) NOT NULL, " + "CREATED_DATE DATE NOT NULL, " + "PRIMARY KEY (USER_ID) " + ")" ; try { dbConnection = MySqlJDBSUtil.getConnection(); preparedStatement = dbConnection.prepareStatement(createTableSQL); System.out.println(createTableSQL); preparedStatement .executeUpdate(); System.out.println("Table \"USER_INFO\" is created!" ); } catch (SQLException e) { System.out.println(e.getMessage()); } finally { if (preparedStatement != null ) { preparedStatement.close(); } if (dbConnection != null ) { dbConnection.close(); } } } }
二,测试
运行结果:
CREATE TABLE USER_INFO(USER_ID int(5) NOT NULL, USERNAME VARCHAR(20) NOT NULL, CREATED_BY VARCHAR(20) NOT NULL, CREATED_DATE DATE NOT NULL, PRIMARY KEY (USER_ID) )
Table "USER_INFO" is created!
表的创建:
Author:
Darren Du
License:
Copyright (c) 2019 MIT LICENSE