deleteservlet.java

用j2ee开发的b/s通讯录. 欢迎各位使用

package y2javaee.xmal1.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import y2javaee.xmal1.common.Validate;
import y2javaee.xmal1.operation.BookBo;
/**
 * 处理通讯录删除功能的Servlet
 */
public class DeleteServlet extends HttpServlet {

	
	private static final long serialVersionUID = 1L;

	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		this.doPost(request, response);
	}

	
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		//中文处理
		response.setContentType("text/html;charset=gb2312");
		PrintWriter out = response.getWriter();
		//获取参数id值
		String id = Validate.validStringNull(request.getParameter("id"));
		//创建通讯录业务类对象，并调用删除方法，删除参数id指定的信息
		BookBo bo = new BookBo();
		int count = bo.deleteBookById(id);
		if (count > 0) {			
			//删除成功后，转向到查询功能的Servlet,以查询通讯录信息
			request.getRequestDispatcher("SelectServlet").forward(request, response);
			//out.print("<script type='' language='javascript'>alert('删除成功。');location.href='index.jsp?url=content' </script>");
		}else{
			//删除失败，返回到前一个页面
			out.print("<script type='' language='javascript'>alert('删除失败。');history.go(-1); </script>");
		}

	}

}