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import java.sql.Connection;
import java.sql.DataTruncation;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.Statement;
public class DemoDataTruncation {
public static void displayError(DataTruncation dataTruncation) {
System.out.println("Data truncation error: ");
System.out.println(dataTruncation.getDataSize() + " bytes should have been ");
if (dataTruncation.getRead()) {
System.out.println("Read (Error:) ");
} else {
System.out.println("Written (Error:) ");
}
System.out.println(dataTruncation.getTransferSize()
+ " number of bytes of data actually transferred.");
}
public static void displayError(SQLWarning warning) {
while (warning != null) {
if (warning instanceof DataTruncation) {
displayError((DataTruncation) warning);
} else {
System.out.println(" Warning: " + warning.getMessage());
}
warning = warning.getNextWarning();
}
}
public static Connection getMySQLConnection() throws Exception {
String driver = "org.gjt.mm.mysql.Driver";
String url = "jdbc:mysql://localhost/databaseName";
String username = "root";
String password = "root";
Class.forName(driver);
return DriverManager.getConnection(url, username, password);
}
public static void main(String[] args) throws Exception {
Connection conn = getMySQLConnection();
Statement stmt = null;
try {
stmt = conn.createStatement();
stmt.executeUpdate("DELETE FROM animals_table");
displayError(stmt.getWarnings());
stmt.executeUpdate("INSERT INTO animals_table(id, name)"
+ "VALUES(1, 'NameLongerThanColumnLengthInDatabase')");
displayError(stmt.getWarnings());
} catch (DataTruncation dt) {
displayError(dt);
dt.printStackTrace();
} catch (SQLException se) {
System.out.println("Database error message: " + se.getMessage());
} catch (Exception e) {
e.printStackTrace();
} finally {
stmt.close();
conn.close();
}
}
}
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