取得查询SQL里面的字段名和类型

package com.ur.util;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;

/**
* Jan 13, 2011 GetColumnName.java author:linbler
*/

public class GetColumnName {
public static void main(String avgs[]) throws SQLException {
DB db = new DB();
db.Init();
Connection conn = db.getConnection();
PreparedStatement pstmt = (PreparedStatement) conn
.prepareStatement("select a.site_id from dmm_site_info a");
pstmt.execute();
ResultSetMetaData rsmd = (ResultSetMetaData) pstmt.getMetaData();
for (int i = 1; i < rsmd.getColumnCount() + 1; i++) {
System.out.println(rsmd.getColumnName(i));
System.out.println(rsmd.getColumnClassName(i));
}
db.setClose();
}
}