如何从Java的ResultSetMetaData获取不同的数据类型？

所述

ResultSetmetaData.getColumnType(intcolumn)

int

java.sql.Types

例：

Connection connection = DriverManager.getConnection(JDBC_URL, JDBC_USERNAME, JDBC_PASSWORD);PreparedStatement statement = connection.prepareStatement(JDBC_SELECT);ResultSet rs = statement.executeQuery();PrintStream out = System.out;if (rs != null) {    while (rs.next()) {        ResultSetmetaData rsmd = rs.getmetaData();        for (int i = 1; i <= rsmd.getColumnCount(); i++) { if (i > 1) { out.print(","); } int type = rsmd.getColumnType(i); if (type == Types.VARCHAR || type == Types.CHAR) {     out.print(rs.getString(i)); } else {     out.print(rs.getLong(i)); }        }        out.println();    }}