使用JDBC在MySQL中创建具有所有数据类型的表的示例?
Java提供了支持的类/数据类型来存储所有MySQL数据类型" title="SQL数据类型">SQL数据类型,下表是列出了MySQL数据类型的相应Java类型的表-
MySQL Type | Java Type |
---|---|
CHAR | String |
VARCHAR | String |
LONGVARCHAR | String |
NUMERIC | java.math.BigDecimal |
DECIMAL | java.math.BigDecimal |
BIT | boolean |
TINYINT | byte |
SMALLINT | short |
INTEGER | int |
BIGINT | long |
REAL | float |
FLOAT | double |
DOUBLE | double |
BINARY | byte [] |
VARBINARY | byte [] |
LONGVARBINARY | byte [] |
DATE | java.sql.Date |
TIME | java.sql.Time |
TIMESTAMP | java.sql.Tiimestamp |
示例
以下JDBC程序创建一个表,该表的名称示例为MySQL中所有可能的数据类型-
import java.sql.Connection;import java.sql.DriverManager;
import java.sql.Statement;
public class CreatingTable_AllDatatypes {
public static void main(String args[])throws Exception {
//注册驱动程序
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//获得连接
String mysqlUrl = "jdbc:mysql://localhost/sampledatabase";
Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
System.out.println("Connection established......");
//创建一个Statement对象
Statement stmt = con.createStatement();
//查询以创建具有所有支持的数据类型的表
String query = "CREATE table sample_table ("
+ "varchar_column VARCHAR( 20 ), "
+ "tinyint_column TINYINT, "
+ "text_column TEXT, "
+ "date_column DATE, "
+ "smallint_column SMALLINT, "
+ "mediumint_column MEDIUMINT, "
+ "int_column INT, "
+ "bigint_column BIGINT, "
+ "float_column FLOAT( 10, 2 ), "
+ "double_column DOUBLE, "
+ "decimal_column DECIMAL( 10, 2 ), "
+ "datetime_column DATETIME, "
+ "timestamp_column TIMESTAMP, "
+ "time_column TIME, "
+ "year_column YEAR, "
+ "char_column CHAR( 10 ), "
+ "tinyblob_column TINYBLOB, "
+ "tinytext_column TINYTEXT, "
+ "blob_column BLOB, "
+ "mediumblob_column MEDIUMBLOB, "
+ "mediumtext_column MEDIUMTEXT, "
+ "longblob_column LONGBLOB, "
+ "longtext_column LONGTEXT, "
+ "enum_column ENUM( '1', '2', '3' ), "
+ "set_column SET( '1', '2', '3' ), "
+ "bool_column BOOL, "
+ "binary_column BINARY( 20 ), "
+ "varbinary_column VARBINARY( 20 )"
+ ")";
//执行查询
stmt.execute(query);
System.out.println("Table created ........");
}
}
输出结果
Connection established......Table created ........
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