【发布时间】：2014-09-22 06:39:34
【问题描述】：
我使用的系统包括 Jersey (1.18.1) 用于 REST Web 服务 + 自定义 servlet 来处理客户端请求和调用 Web 服务。我也在用FORM方法认证。
问题是在调用 Web 服务之后，servlet 转发s 然后到 index.jsp。在该 JSP 中，html/javascript 代码显示良好，但 java 代码未执行。我必须刷新页面 (F5) 以获取要执行的 java 代码 9 但随后会丢失请求/响应信息)。这种行为的原因可能是什么...？
这是我的 web.xml 的样子：
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:http="http://cxf.apache.org/transports/http/configuration"
xmlns:sec="http://cxf.apache.org/configuration/security"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<display-name>AdminModule</display-name>
<!-- JERSEY 1.18.1 -->
<servlet>
<servlet-name>JerseySpringServlet</servlet-name>
<servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>my.package.restapi</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>MainController</servlet-name>
<servlet-class>my.package.controller.MainController</servlet-class>
</servlet>
<servlet>
<description>
</description>
<display-name>Logout</display-name>
<servlet-name>Logout</servlet-name>
<servlet-class>my.package.controller.Logout</servlet-class>
</servlet>
<servlet>
<description>
</description>
<display-name>DefaultAction</display-name>
<servlet-name>DefaultAction</servlet-name>
<servlet-class>my.package.controller.DefaultAction</servlet-class>
</servlet>
<servlet>
<description>
</description>
<display-name>CreateRole</display-name>
<servlet-name>CreateRole</servlet-name>
<servlet-class>my.package.controller.CreateRole</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>JerseySpringServlet</servlet-name>
<url-pattern>/restapi/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>MainController</servlet-name>
<url-pattern>/CMQAdmin</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Logout</servlet-name>
<url-pattern>/Logout</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>DefaultAction</servlet-name>
<url-pattern>/DefaultAction</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>CreateRole</servlet-name>
<url-pattern>/CreateRole</url-pattern>
</servlet-mapping>
<security-constraint>
<web-resource-collection>
<web-resource-name>Admin security manager</web-resource-name>
<url-pattern>/index.jsp</url-pattern>
<http-method>GET</http-method>
<http-method>POST</http-method>
<http-method>PUT</http-method>
<http-method>DELETE</http-method>
</web-resource-collection>
<auth-constraint>
<role-name>role1</role-name>
<role-name>role2</role-name>
<role-name>role3</role-name>
</auth-constraint>
<user-data-constraint>
<transport-guarantee>CONFIDENTIAL</transport-guarantee>
</user-data-constraint>
</security-constraint>
<security-constraint>
<web-resource-collection>
<web-resource-name>Admin security manager</web-resource-name>
<url-pattern>/DefaultAction</url-pattern>
<http-method>GET</http-method>
<http-method>POST</http-method>
<http-method>PUT</http-method>
<http-method>DELETE</http-method>
</web-resource-collection>
<auth-constraint>
<role-name>role1</role-name>
<role-name>role2</role-name>
<role-name>role3</role-name>
</auth-constraint>
<user-data-constraint>
<transport-guarantee>CONFIDENTIAL</transport-guarantee>
</user-data-constraint>
</security-constraint>
<security-constraint>
<web-resource-collection>
<web-resource-name>Admin security manager</web-resource-name>
<url-pattern>/CMQAdmin</url-pattern>
<http-method>GET</http-method>
<http-method>POST</http-method>
<http-method>PUT</http-method>
<http-method>DELETE</http-method>
</web-resource-collection>
<auth-constraint>
<role-name>role1</role-name>
<role-name>role2</role-name>
<role-name>role3</role-name>
</auth-constraint>
<user-data-constraint>
<transport-guarantee>CONFIDENTIAL</transport-guarantee>
</user-data-constraint>
</security-constraint>
<!-- Define the Login Configuration for this Application -->
<login-config>
<auth-method>FORM</auth-method>
<form-login-config>
<form-login-page>/login.jsp</form-login-page>
<form-error-page>/error.jsp</form-error-page>
</form-login-config>
</login-config>
<!-- Security roles referenced by this web application -->
<security-role>
<role-name>role1</role-name>
</security-role>
<security-role>
<role-name>role2</role-name>
</security-role>
<security-role>
<role-name>role3</role-name>
</security-role>
<session-config>
<session-timeout>30</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>CMQAdmin</welcome-file>
</welcome-file-list>
</web-app>
jsp中的代码。当 servlet 转发后页面显示时，根本不执行任何 java 代码：
<%@ page import="org.json.*"%>
<%@ page import="java.io.*,java.util.*" %>
<html>
<b>Cookies: ${cookie.username.value} </b>
<head>
<meta charset="utf-8">
<title>Admin</title>
<link rel="stylesheet" href="${pageContext.request.contextPath}/css/jquery.mobile-1.4.2.css" />
<link rel="stylesheet" href="${pageContext.request.contextPath}/css/style.css" />
<link rel="stylesheet" href="${pageContext.request.contextPath}/css/component.css" />
<script src="https://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="https://code.jquery.com/mobile/1.4.2/jquery.mobile-1.4.2.min.js"></script>
<script src="${pageContext.request.contextPath}/js/cbpFWTabs.js"></script>
<script type="text/javascript">
$(document).ready(function() {
<%
if(!request.isUserInRole("1") && !request.isUserInRole("2") && !request.isUserInRole("3")) {
%>
<p>some html code AAA</p>
<%
}
else if(request.isUserInRole("1"))
{
%>
<p>some html code BBB</p>
<%
}
else if(request.isUserInRole("2"))
{
%>
<p>some html code CCC</p>
<%
}
else if(request.isUserInRole("3"))
{
%>
<p>some html code DDD</p>
<%
}
%>
});
</script>
</head>
<body>
<div id="logo" class="logo"> </div>
<div id="utils" class="utils">
<div id="logout" class="logout">
<form action="${pageContext.request.contextPath}/CMQAdmin" method="POST">
<input type="hidden" name="action" value="logoutaction">
<input type="submit" value="Logout" />
</form>
</div>
</div>
<div id="mainDiv" class="main">
<div id="title" class="title">Admin Module</div>
<div id="tabs" class="tabs">
<nav>
<ul>
<%
if(request.isUserInRole("2") || request.isUserInRole("1")) {
%>
<li><a href="#section-3" id="section-3-tab" class="icon-patients"><span>a</span></a></li>
<li><a href="#section-1" id="section-1-tab" class="icon-cfgclinics"><span>b</span></a></li>
<li><a href="#section-2" id="section-2-tab" class="icon-users"><span>c</span></a></li>
<li><a href="#section-4" id="section-4-tab" class="icon-patients"><span>d</span></a></li>
<li><a href="#section-5" id="section-5-tab" class="icon-cfgclinics"><span>e</span></a></li>
<%
}
else if(request.isUserInRole("3")) {
%>
<li><a href="#section-5" id="section-5-tab" class="icon-cfgclinics"><span>b</span></a></li>
<li><a href="#section-3" id="section-3-tab" class="icon-patients"><span>a</span></a></li>
<li><a href="#section-1" id="section-1-tab" class="icon-cfgclinics"><span>c</span></a></li>
<li><a href="#section-2" id="section-2-tab" class="icon-users"><span>d</span></a></li>
<li><a href="#section-4" id="section-4-tab" class="icon-patients"><span>e</span></a></li>
<%
}
%>
</ul>
</nav>
<div id="menu" class="menu">
<%
if(request.isUserInRole("2")) {
%>
<section id="section-3">
<div id="getPatientInfos" class="button">
<a id="lnkGetPatientInfos"
class="ui-btn ui-icon-plus ui-btn-icon-left ui-corner-all ui-shadow">Get infos</a>
</div>
<div id="creditTokens" class="button">
<a id="lnkCreditTokens"
class="ui-btn ui-icon-plus ui-btn-icon-left ui-corner-all ui-shadow">Post info</a>
</div>
<div id="createPatient" class="button">
<a id="lnkCreatePatient"
class="ui-btn ui-icon-plus ui-btn-icon-left ui-corner-all ui-shadow">put info</a>
</div>
<div id="registerPatient" class="button">
<a id="lnkRegisterPatient"
class="ui-btn ui-icon-plus ui-btn-icon-left ui-corner-all ui-shadow">delete info</a>
</div>
</section>
<%
}
else if(request.isUserInRole("3")) {
%>
<section id="section-5">
<div id="IndiActivation" class="button">
<a id="lnkIndiActivation"
class="ui-btn ui-icon-plus ui-btn-icon-left ui-corner-all ui-shadow">get info</a>
</div>
</section>
<%
}
else if(request.isUserInRole("1")) {
%>
<section id="section-3">
...
</section>
<%
}
%>
</div>
<!-- /menu -->
</div>
<!-- /tabs -->
<div id="content" class="content">Click on any button on the
left to load content in here.</div>
<!-- /content -->
<div id="info" class="info"> </div>
</div>
<!-- /mainDiv -->
<script>
new CBPFWTabs(document.getElementById('tabs'));
</script>
</body>
</html>
调用 web 服务（调用正常）然后转发回 index.jsp 的 servlet：
public class CreateRole extends HttpServlet {
private static final long serialVersionUID = 1L;
@Autowired
private RoleFacade roleFacade;
/**
* Logger...
*/
private static final Logger logger = Logger.getLogger(CreateRole.class.getName());
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code>
* methods.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
logger.info("CreateRole::processRequest");
String createRole = "AdminModule/SaveOrUpdateRole";
logger.info("CreateRole::rolename+description: " + rolename + " + " + description);
// get user roles from web service
String baseURL = https://localhost/AdminModule/restapi;
Form form = new Form();
form.add("rolename", rolename);
form.add("description", description);
JerseyClient client = new JerseyClient(form, baseURL+createRole);
ClientResponse clientResponse = client.post_Form(form);
if(clientResponse.getStatus() == 200 || clientResponse.getStatus() == 201) {
logger.info("ROLE [" + clientResponse.getEntity(String.class) + "] has been successfully created");
// do whatever with response
client.close();
request.setAttribute("", request.getParameter("action"));
this.getServletContext().getRequestDispatcher("/index.jsp").forward(request, response);
return;
}
else {
request.setAttribute("error", true);
request.setAttribute("wrErrorMessage", "Could not create new role");
RequestDispatcher r = this.getServletContext().getRequestDispatcher("/index.jsp");
r.forward(request, response);
return;
}
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
}
}
【问题讨论】：
-
除了
${cookie.username.value}，我在 index.jsp 中看不到 java 代码。还是您指的是进口？ -
我写这行代码只是为了说明我至少应该在显示屏上看到“Cookies:...”，但我什么也没看到。其余的 html 打印正常。要我包含所有 index.jsp 代码吗？
-
有一个不起作用的样本会很好