JSP表單驗證實例
來源：程序員人生 發布時間：2014-12-24 08:27:07 閱讀次數：2433次
1、表單填寫頁面
<%@ page language="java" contentType="text/html; charset=ISO⑻859⑴"
pageEncoding="ISO⑻859⑴"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO⑻859⑴">
<title>Form Table</title>
</head>
<body>
<form action="TestServlet" method="post">
<table border="2" cellspaceing="1" cellpadding="3" bgcolor="#F00000">
<th colspan="2" align="center">
Sumbmit Table
</th>
<tr>
<td>username</td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td>sex</td>
<td>
male<input type="radio" name="sex" value="male">
female<input type="radio" name="sex" value="female">
</td>
</tr>
<tr>
<td>address</td><td><input type="text" name="address"></td>
</tr>
<tr>
<td>likes</td>
<td>
sing<input type="checkbox" name="likes" value="sing">
dance<input type="checkbox" name="likes" value="dance">
game<input type="checkbox" name="likes" value="game">
</td>
</tr>
<tr>
<td>
</td>
<td>
<input type="submit" value="Submit">
<input type="reset" value="Reset">
</td>
</tr>
</table>
</form>
</body>
</html>
2、Servlet驗證
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class TestServlet
*/
@WebServlet(name="testservlet",urlPatterns={"/TestServlet"})
public class TestServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public TestServlet() {
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
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String name=request.getParameter("username");
String sex=request.getParameter("sex");
String add=request.getParameter("address");
String[] likes0=request.getParameterValues("likes");
String likes="";
for(int i=0;i<likes0.length;i++){
likes+=likes0[i]+" ";
}
request.setAttribute("name", name);
request.setAttribute("sex", sex);
request.setAttribute("address", add);
request.setAttribute("likes", likes);
request.getRequestDispatcher("result.jsp").forward(request,response);
PrintWriter out=response.getWriter();
out.println(name);
out.println(sex);
out.println(add);
out.println(likes);
}
}
3、驗證結果輸出
<%@ page language="java" contentType="text/html; charset=ISO⑻859⑴"
pageEncoding="ISO⑻859⑴"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO⑻859⑴">
<title>result</title>
</head>
<body>
<table border="2" cellspaceing="1" cellpadding="3" bgcolor="#00FF00">
<th colspan="2" align="center">
Result Table
</th>
<tr>
<td>username</td>
<td><%=request.getAttribute("name") %></td>
</tr>
<tr>
<td>sex</td>
<td>
<%=request.getAttribute("sex") %>
</td>
</tr>
<tr>
<td>address</td>
<td><%=request.getAttribute("address") %></td>
</tr>
<tr>
<td>likes</td>
<td>
<%=request.getAttribute("likes") %>
</td>
</tr>
</table>
</body>
</html>
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