Demo PreparedStatement Set Null for char/string column
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
public class DemoPreparedStatementSetNull {
public static Connection getConnection() throws Exception {
String driver = "org.gjt.mm.mysql.Driver";
String url = "jdbc:mysql://localhost/databaseName";
String username = "root";
String password = "root";
Class.forName(driver);
Connection conn = DriverManager.getConnection(url, username, password);
return conn;
}
public static void main(String[] args) throws Exception {
String id = "0001";
Connection conn = null;
PreparedStatement pstmt = null;
try {
conn = getConnection();
String query = "insert into nullable_table(id,string_column, int_column) values(?, ?, ?)";
// create PrepareStatement object
pstmt = conn.prepareStatement(query);
pstmt.setString(1, id);
pstmt.setNull(2, java.sql.Types.VARCHAR);
pstmt.setNull(3, java.sql.Types.INTEGER);
// execute query, and return number of rows created
int rowCount = pstmt.executeUpdate();
System.out.println("rowCount=" + rowCount);
} finally {
pstmt.close();
conn.close();
}
}
}
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