Java中如何获得数据库支持的数字函数?
package org.nhooo.example.jdbc; import java.sql.Connection; import java.sql.DriverManager; import java.sql.DatabaseMetaData; import java.sql.SQLException; public class NumericFunction { private static final String URL = "jdbc:mysql://localhost/nhooo"; private static final String USERNAME = "root"; private static final String PASSWORD = ""; public static void main(String[] args) { try (Connection connection = DriverManager.getConnection(URL, USERNAME, PASSWORD)) { DatabaseMetaData meta = connection.getMetaData(); //获取数据库支持的数字函数 String[] functions = meta.getNumericFunctions().split(",\\s*"); for (String function : functions) { System.out.println("Function = " + function); } } catch (SQLException e) { e.printStackTrace(); } } }
这是MySQL数据库支持的数字函数。
Function = ABS Function = ACOS Function = ASIN Function = ATAN Function = ATAN2 Function = BIT_COUNT Function = CEILING Function = COS Function = COT Function = DEGREES Function = EXP Function = FLOOR Function = LOG Function = LOG10 Function = MAX Function = MIN Function = MOD Function = PI Function = POW Function = POWER Function = RADIANS Function = RAND Function = ROUND Function = SIN Function = SQRT Function = TAN Function = TRUNCATE
Maven依赖
<!-- https://search.maven.org/remotecontent?filepath=mysql/mysql-connector-java/8.0.17/mysql-connector-java-8.0.17.jar --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.17</version> </dependency>