1.方法/* * 查看全部信息 */ public List<Member> selectByName(String name) { // TODO Auto-generated method stub List<Member> list=new ArrayList<Member>(); PreparedStatement pre=null; ResultSet rs=null; try { String sql="select*from blog where name=?"; pre=con.prepareStatement(sql); pre.setString(1, name); rs=pre.executeQuery(); while(rs.next()) { Member user=new Member(); user.setName(rs.getString("name")); user.setAge(rs.getString("age")); list.add(user); } }catch(SQLException e) { e.printStackTrace(); }finally { Databass.Databass.close(rs, pre, con); } return list; } public List<Member> selectall(){ List<Member> list=new ArrayList<Member>(); try { String sql="select * from blog"; PreparedStatement pre=con.prepareStatement(sql); ResultSet rs=pre.executeQuery(); while(rs.next()) { Member user=new Member(); user.setName(rs.getString("name")); user.setAge(rs.getString("age")); list.add(user); } rs.close(); pre.close(); con.close(); }catch(SQLException e) { e.printStackTrace(); } return list; }
通过姓名查找servlet/** * Servlet implementation class ServletSearchByname */ @WebServlet("/ServletSearchByname") public class ServletSearchByname extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public ServletSearchByname() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub response.getWriter().append("Served at: ").append(request.getContextPath()); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub //设置请求字体 request.setCharacterEncoding("utf-8"); response.setContentType("text/html;charset=utf-8"); String name=request.getParameter("name"); Method ww=new Method(); List<Member> list=ww.selectByName(name); request.setAttribute("list", list); request.getRequestDispatcher("/searchByName1.jsp").forward(request, response); } }
查询所有信息servletpackage Servlet; import java.io.IOException; import java.util.List; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import Member.Member; import Method.Method; /** * Servlet implementation class ServletShow */ @WebServlet("/ServletShow") public class ServletShow extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public ServletShow() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub response.getWriter().append("Served at: ").append(request.getContextPath()); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //设置请求字体 request.setCharacterEncoding("utf-8"); response.setContentType("text/html;charset=utf-8"); Method sd=new Method(); List<Member> list=sd.selectByName(request.getParameter("name")); request.setAttribute("list", list); request.getRequestDispatcher("/show.jsp").forward(request, response); } }
输入姓名进行查找<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="Method.*,Member.*,Servlet.*,java.util.List" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>通过姓名进行查找</title> </head> <body> <form action="ServletSearchByname" method="post"> 请输入要查询的姓名: <a><input type="text" name="name"></a> <a><input type="submit" value="查询"></a> </form> </body> </html>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <%@page import="Member.*,Method.*,java.util.List,Servlet.*" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>通过姓名查找</title> </head> <body> <table> <tr> <td>姓名</td> <td>年龄</td> </tr> <% String name=request.getParameter("name"); Method ww=new Method(); List<Member> list=ww.selectByName(name); request.setAttribute("list", list); %> <c:forEach var="u" items="${list}"> <tr> <td>${u.name}</td> <td>${u.age }</td> </tr> </c:forEach> </table> </body> </html>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <%@page import="Member.*,Method.*,java.util.List,Servlet.*" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <table border="" > <tr> <td>姓名:</td> <td>年龄:</td> </tr> <% Method sd=new Method(); List<Member> list=sd.selectall(); request.setAttribute("list", list); %> <c:forEach var="u" items="${list}"> <tr> <td>${u.name}</td> <td>${u.age }</td> </tr> </c:forEach> </table> <a href="main.jsp">返回主页</a> </body> </html>
原文地址:https://www.cnblogs.com/lianggegege123/p/12055820.html
时间: 2024-11-09 00:03:11