queryservlet.java

java的mvc模式代码示例,阅读文件包然后写出其具体功能

package servlet;

import java.io.IOException;
import java.util.ArrayList;

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

import dao.StudentDao;

public class QueryServlet extends HttpServlet {

	public QueryServlet() {
		super();
	}

	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String sname = request.getParameter("sname");
		try{
			sname = new String(sname.getBytes("ISO-8859-1"));
		}catch(Exception ex){ex.printStackTrace();}
		//调用JavaBean查询数据库（Data Access Object  dao）
		StudentDao studentDao = new StudentDao();
		ArrayList stus = studentDao.queryStuByName(sname);
		request.setAttribute("stus", stus);
		
		//跳转到另一个Jsp显示结果
		ServletContext application = this.getServletContext();
		RequestDispatcher rd = application.getRequestDispatcher("/queryResult.jsp");
		rd.forward(request,response);
	}

	public void init() throws ServletException {
		// Put your code here
	}

}