JDBCステートメントの例 – レコードを更新する
次に、JDBCステートメントを使用してテーブル内のレコードを更新する方法を示す例を示します。 update文を発行するには、次のように `Statement.executeUpdate（）`メソッドを呼び出します。
Statement statement = dbConnection.createStatement();//execute the update SQL stetement statement.executeUpdate(updateTableSQL);
完全な例…
package com.mkyong.jdbc;
import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
public class JDBCStatementUpdateExample {
private static final String DB__DRIVER = "oracle.jdbc.driver.OracleDriver";
private static final String DB__CONNECTION = "jdbc:oracle:thin:@localhost:1521:MKYONG";
private static final String DB__USER = "user";
private static final String DB__PASSWORD = "password";
public static void main(String[]argv) {
try {
updateRecordIntoDbUserTable();
} catch (SQLException e) {
System.out.println(e.getMessage());
}
}
private static void updateRecordIntoDbUserTable() throws SQLException {
Connection dbConnection = null;
Statement statement = null;
String updateTableSQL = "UPDATE DBUSER"
+ " SET USERNAME = 'mkyong__new' "
+ " WHERE USER__ID = 1";
try {
dbConnection = getDBConnection();
statement = dbConnection.createStatement();
System.out.println(updateTableSQL);
//execute update SQL stetement
statement.execute(updateTableSQL);
System.out.println("Record is updated to DBUSER table!");
} catch (SQLException e) {
System.out.println(e.getMessage());
} finally {
if (statement != null) {
statement.close();
}
if (dbConnection != null) {
dbConnection.close();
}
}
}
private static Connection getDBConnection() {
Connection dbConnection = null;
try {
Class.forName(DB__DRIVER);
} catch (ClassNotFoundException e) {
System.out.println(e.getMessage());
}
try {
dbConnection = DriverManager.getConnection(
DB__CONNECTION, DB__USER,DB__PASSWORD);
return dbConnection;
} catch (SQLException e) {
System.out.println(e.getMessage());
}
return dbConnection;
}
}
