getbookinfo.java

来自「是Eclipse web开发从入门到精通的源码」· Java 代码 · 共 40 行

package tags;

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

import db.AdminOperation;

public class GetBookInfo 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AdminOperation对象
		AdminOperation db = new AdminOperation();
		int bookId = Integer.parseInt(content);
		// 根据bookId从数据库中查询图书等级的信息
		String name = db.getBookBean(bookId).getBookType();
		// 关闭数据库连接
		db.Close();
		try {
			out.print(name);
		} catch (IOException e) {
			e.printStackTrace();
		}
		return (SKIP_BODY);
	}
}