javaweb的一個增刪查改的小案例（續）
阿新 • • 發佈：2019-02-17
1.建立一個可以進行查詢也可以進入到新增到資料的頁面的連結
如下為jsp頁面
2.建立一個list.jsp頁面我們可以在這裡便利集合中的物件通過便利物件放置在table中可以更好的額顯示出來，<%@ page language="java" import="java.util.*" import="com.mvcapp.domain.Customer" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <script type="text/javascript" src="js/jquery-1.7.2.min.js"></script> <script type="text/javascript"> $(function(){ $(".delete").click(function(){ var content=$(this).parent().parent().find("td:eq(1)").text(); var flag=confirm("確定要刪除"+content+"的資訊嗎"); return true; }); }); </script> </head> <body style="height: 5px; "> <a href="ListAppStudentServlet">listallstudentservlet</a> <form action="query.do" method="post"> <table border="1px" cellpadding="10px" cellspacing="1px"> <tr> <td>CustomerName</td> <td><input type="text" name="name"></td> </tr> <tr> <td>Address</td> <td><input type="text" name="address"/></td> </tr> <tr> <td>Phone</td> <td><input type="text" name="phone"/></td> </tr> <tr> <td ><input type="submit" value="query"/></td> <td><a href="newcustomer.jsp">Add New Customer</a></td> </tr> </table> </form> <br><br> <% List<Customer> customerlist=(List<Customer>)request.getAttribute("listall"); if(customerlist!=null&&customerlist.size()>0){ %> <br><br> <table border="1" cellpadding="10" cellspacing="0"> <tr> <td>ID</td> <td>CustomerName</td> <td>Address</td> <td>Phone</td> <td>update</td> <td>delete</td> </tr> <% for(Customer c:customerlist){ %> <tr> <td><%=c.getId() %></td> <td><%=c.getName()%></td> <td><%=c.getAddress() %></td> <td><%=c.getPhone()%></td> <td><a href="edit.do?id=<%=c.getId()%>">update</a></td> <td><a href="delete.do?id=<%=c.getId()%>" class="delete">delete</a></td> </tr> <% } %> </table> <% } %> </body> </html>
<%@ page language="java" import="java.util.*" import="com.mvc.test.Student" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'list.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> </head> <body> <% List<Student> ad=(List)request.getAttribute("students"); System.out.println(ad); %> <table border="1" cellpadding="10" cellspacing="0"> <tr> <td>Id</td> <td>UserName</td> <td>Password</td> <td>Delete</td> </tr> <% for(Student a:ad){ %> <tr>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'error.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> This is my JSP page. <br> <h2>對不起沒有指定頁面</h2> </body> </html>
4.建立一個lis.jsp頁面，我們可以在該頁面中進行對資料的修改。然後提交到資料庫中予以儲存
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'newcustomer.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head>
<body>
<%=request.getAttribute("message")==null?"":request.getAttribute("message")%>
<form action="addCustomer.do" method="post">
<table border="1px" cellpadding="10px" cellspacing="1px">
<tr>
<td>CustomerName</td>
<td><input type="text" name="name" value="<%=request.getParameter("name")==null?"":request.getParameter("name")%>"></td>
</tr>
<tr>
<td>Address</td>
<td><input type="text" name="address"/></td>
</tr>
<tr>
<td>Phone</td>
<td><input type="text" name="phone"/></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="submit"/></td>
</tr>
</table>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" import="com.mvcapp.domain.Customer" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'updatecustomer.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head>
<body>
<%=request.getAttribute("message")==null?"":request.getAttribute("message")%>
<%
Customer customer=(Customer)request.getAttribute("customer");
%>
<form action="update.do" method="post">
<input type="hidden" name="id" value="<%=customer.getId()%>">
<input type="hidden" name="oldName" value="<%=customer.getName()%>">
<table border="1px" cellpadding="10px" cellspacing="1px">
<tr>
<td>CustomerName</td>
<td><input type="text" name="name" value="<%=customer.getName()%>"></td>
</tr>
<tr>
<td>Address</td>
<td><input type="text" name="address" value="<%=customer.getAddress()%>"/></td>
</tr>
<tr>
<td>Phone</td>
<td><input type="text" name="phone" value="<%=customer.getPhone()%>"/></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="update"/></td>
</tr>
</table>
</form>
</body>
</html>