getusercity.java

该系统实现了网上购物及书店管理

package tags;

import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.BodyTagSupport;

import db.CustomerOperation;

import java.io.IOException;
import javax.servlet.jsp.tagext.BodyContent;

public class GetUserCity extends BodyTagSupport {
	JspWriter out = null;

	/**
	 * 覆盖doAfterBody（）类
	 * 
	 * @see javax.servlet.jsp.tagext.IterationTag#doAfterBody()
	 */
	public int doAfterBody() {
		// 取得BodyContent对象
		BodyContent body = getBodyContent();
		// 取得Body中的内容
		String content = body.getString();
		// 取得JspWriter对象
		out = body.getEnclosingWriter();
		// 初始化CustomerOperation对象
		CustomerOperation db = new CustomerOperation();
		int userId = Integer.parseInt(content);
		// 根据userId从数据库中查询用户城市的信息
		int cityId = db.getUser(userId).getUserCity();
		String name = db.getCity(cityId);
		// 关闭数据库的连接
		db.Close();
		try {
			out.print(name);
		} catch (IOException e) {
			e.printStackTrace();
		}
		return (SKIP_BODY);
	}
}