jsp之间数据传递
1. 怎么在多个JSP页面之间进行参数传递？需要使用JSP的内置作用域对象session。利用它的两个方法setAttribute()，getAttribute()
2. 下面的这个实例实现了把第一个JSP页面的参数传递给第三个页面的功能
3. 代码如下：1.jsp
<html>
<form method=get action=2.jsp>
what’s your name<input type=text name=username>
<input type=submit value=submit>
</form>
</html>
4. 2.jsp
<html>
<form method=post action=”3.jsp?pass=11″>
<%
String name=request.getParameter(”username”);
session.setAttribute(”username”,name);
%>
Your name is:<%=request.getParameter(”username”)%>
<br>what’s your hobby<input type=text name=hobby>
<input type=submit value=submit>
</form>
</html>
5. 3.jsp
</pre><p></p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; font-family: Helvetica, Tahoma, Arial, sans-serif; font-size: 14px; line-height: 25.2000007629395px;"><span style="color: rgb(0, 0, 255); font-size: 12px;"><span style="color: rgb(51, 51, 0);"><html> your name is:<%=session.getAttribute(”username”)%> <br> your hobby is:<%=request.getParameter(”hobby”)%> <br> your password is:<%=request.getParameter(”pass”)%> <br> </form></html></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; font-family: Helvetica, Tahoma, Arial, sans-serif; font-size: 14px; line-height: 25.2000007629395px;"><span style="color: rgb(0, 0, 255); font-size: 12px;"><span style="color: rgb(51, 51, 0);"></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; font-family: Helvetica, Tahoma, Arial, sans-serif; font-size: 14px; line-height: 25.2000007629395px;">以下是jsp跟servlet之间数据的传送</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; font-family: Helvetica, Tahoma, Arial, sans-serif; font-size: 14px; line-height: 25.2000007629395px;"></p><pre name="code" class="html" style="color: rgb(51, 51, 0); line-height: 25.2000007629395px;"><%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="shenfenChuli" method="post">
<input type="text" name="id"/>
<input type="submit" value="提交"/>
</form>
</body>
</html>
package com.LiDi.xhj;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
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 ShenfenChuli
*/
@WebServlet("/shenfenChuli")
public class ShenfenChuli extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String id=request.getParameter("id");
int len=0;
if (id.length()==15) {
len=15;
}else if(id.length()==18){
len=18;
}else{
len=-1;
}
request.setAttribute("b", len);
request.setAttribute("a", id);
String path="One.jsp";
RequestDispatcher rd=request.getRequestDispatcher("/"+path);
rd.forward(request, response);
}
}
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%-- <jsp:useBean id="sfz" class="com.LiDi.xhj.ShenfenChuli" scope="session"></jsp:useBean>
<jsp:param >
--%>
<%
int len;
String str=request.getAttribute("a").toString();
len=Integer.parseInt(request.getAttribute("b").toString());
String str5;
if(len==18){
String str1=str.substring(6, 14);
String str2=str1.substring(0, 4);
String str3=str1.substring(4, 6);
String str4=str1.substring(6, 8);
str5=str2+"/"+str3+"/"+str4;
}else{
out.print("输入的身份证号非法");
return;
}
%>
<table width="322" border="0">
<tr align="center" bgcolor="#66FF00">
<td width="161">身份证</td>
<td width="151">出生日期</td>
</tr>
<tr>
<td>
<%
out.print(str);
%>
</td>
<td>
<%
out.print(str5);
%>
</td>
</tr>
</table>
</body>
</html>