如何将列表转发到jsp文件?
我使用的是restful方法,其中我希望将列表传递给jsp文件。如何将列表转发到jsp文件?,jsp,redirect,request,forward,restful-url,Jsp,Redirect,Request,Forward,Restful Url,我使用的是restful方法,其中我希望将列表传递给jsp文件。 以下是restful方法: @Path("myRest") public void handleRequestInternal() throws Exception { try { Request req = new Request(); List<String> roles = manager2.getAllRoles(); req.setAttribute("
以下是restful方法:
@Path("myRest")
public void handleRequestInternal() throws Exception {
try {
Request req = new Request();
List<String> roles = manager2.getAllRoles();
req.setAttribute("roles", roles);
java.net.URI location = new java.net.URI("../index.jsp");
throw new WebApplicationException(Response.temporaryRedirect(location).build());
} catch (URISyntaxException e) {
e.printStackTrace();
}
}
@Path(“myRest”)
public void handleRequestInternal()引发异常{
试一试{
请求req=新请求();
List roles=manager2.getAllRoles();
请求setAttribute(“角色”,角色);
java.net.URI location=新的java.net.URI(“../index.jsp”);
抛出新的WebApplicationException(Response.temporaryRedirect(location.build());
}捕获(URISyntaxException e){
e、 printStackTrace();
}
}
我使用webApplicationException进入所需页面。(事实上,在使用restful方法时,我没有找到其他转发或重定向的方法)
这是我的jsp文件:
<% if(request.getAttribute("roles") != null){%>
<% Object obj = (Object)request.getAttribute("roles");
List<String> roles = (List<String>) obj;%>
<select name="role">
<%int size = roles.size();%>
<%for(int i = 0; i < size; i++){ %>
<option value = "<%= roles.get(i)%>"><%= roles.get(i)%>
<%} %>
</select>
<%}%>
<% if(request.getParameter("roles") != null){%>
<!-- process request.getParameter("roles") into an arraylist and you are good to go -->
<%}%>
但是我从请求中什么也没有得到。getAttribute(“角色”)
有什么问题吗?我想你最好做以下几点:
编写restful方法如下:
@Path("myRest")
public void handleRequestInternal() throws Exception {
try {
List<String> roles = manager2.getAllRoles();
String role = new String();
for(int i = 0; i < roles.size(); i++){
if(i != roles.size() - 1)
role += roles.get(i) + '-';
else
role += roles.get(i);
}
java.net.URI location = new java.net.URI("../index.jsp?roles=" + role);
throw new WebApplicationException(Response.temporaryRedirect(location).build());
} catch (URISyntaxException e) {
e.printStackTrace();
}
}
@Path(“myRest”)
public void handleRequestInternal()引发异常{
试一试{
List roles=manager2.getAllRoles();
字符串角色=新字符串();
对于(int i=0;i
在jsp文件中:
<% if(request.getAttribute("roles") != null){%>
<% Object obj = (Object)request.getAttribute("roles");
List<String> roles = (List<String>) obj;%>
<select name="role">
<%int size = roles.size();%>
<%for(int i = 0; i < size; i++){ %>
<option value = "<%= roles.get(i)%>"><%= roles.get(i)%>
<%} %>
</select>
<%}%>
<% if(request.getParameter("roles") != null){%>
<!-- process request.getParameter("roles") into an arraylist and you are good to go -->
<%}%>
Ah,您的意思是将我的变量放入url。好吧,这不是一个安全问题,这对我来说很好。非常感谢。