小编dsn*_*don的帖子

我正在编写一些需要处理任意数量的双精度列表的代码.但是,虽然我可以声明类型List<List<Double>>I的函数参数在创建实际实例时遇到问题,因为我需要创建一个具体类的实例,例如ArrayList

我试过了

List<? extends List<Double>> inputs = new ArrayList<List<Double>>();
inputs.add(new ArrayList<Double>());

和

List<? extends List<? extends Double>> inputs = new ArrayList<List<Double>>();
inputs.add(new ArrayList<Double>());

但在这两种情况下,我都会在调用时遇到编译错误,add()说该方法不适用于类型的参数ArrayList<Double>

这有效

List<List<Double>> inputs = new ArrayList<List<Double>>();
inputs.add((List<Double>) new ArrayList<Double>());

但是以这种方式使用演员阵容有点难看.有更好的方法吗？

我试过在Spring论坛上问这个问题(http://forum.springsource.org/showthread.php?109948-Problem-configuring-spring-security-3.1-with-hybrid-Spring-MVC-Flex-application)但是没有得到回应.

我正在开发一个Web应用程序,它具有内置Flex的(最终用户)用户界面和使用Spring MVC构建的管理用户界面.我正在尝试保护两个接口,并且可以让每个接口单独工作,但不能一起工作.

我正在使用带有Spring Security 3.1RC1和Spring 3.1M1的spring-flex-core 1.5.0的快照构建

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:security="http://www.springframework.org/schema/security"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.1.xsd">

<!-- All Spring Security related configuration goes here -->

<security:global-method-security secured-annotations="enabled" jsr250-annotations="enabled"/>

<security:http pattern="/messagebroker/**" entry-point-ref="entryPoint">
    <security:anonymous enabled="false"/>
</security:http>

<bean id="entryPoint" class="org.springframework.flex.security3.FlexAuthenticationEntryPoint"/>

<security:http pattern="/favicon.ico" security="none"/>
<security:http pattern="/login*" security="none"/>
<security:http pattern="/logoutSuccess*" security="none"/>
<security:http pattern="/apollo/css/**" security="none"/>
<security:http pattern="/apollo/js/**" security="none"/>
<security:http pattern="/apollo/img/**" security="none"/>
<security:http pattern="/common/css/**" security="none"/>
<security:http pattern="/common/js/**" security="none"/>
<security:http pattern="/common/img/**" security="none"/>
<security:http pattern="/MoneyManager.swf" security="none"/>
<security:http pattern="/assets/**" security="none"/>
<security:http pattern="/index.jsp" security="none"/>

<security:http servlet-api-provision="true"> …