小编000*_*000的帖子

这个春季启动错误意味着什么？

2016-07-04 21:53:53 [restartedMain] ERROR o.s.boot.SpringApplication - Application startup failed    org.springframework.beans.factory.BeanCreationException: Error creating bean with name org.springframework.boot.autoconfigure.session.SessionAutoConfiguration$SessionRepositoryValidator': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: No session repository could be auto-configured, check your configuration (session store type is 'null')

为什么我的弹簧测试设置失败,下面没有如此有用的错误消息？所有建议表示赞赏.

JUnit输出

java.lang.NoClassDefFoundError: org/junit/runners/model/MultipleFailureException
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.withAfterClasses(SpringJUnit4ClassRunner.java:188)
at org.junit.runners.ParentRunner.classBlock(ParentRunner.java:145)
at org.junit.runners.ParentRunner.run(ParentRunner.java:235)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run (SpringJUnit4ClassRunner.java:163)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.ClassNotFoundException: org.junit.runners.model.MultipleFailureException
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 10 more

控制台输出

INFO:org.springframework.test.context.support.DefaultTestContextBootstrapper - 从位置[META-INF/spring.factories]加载默认的TestExecutionListener类名:[org.springframework.test.context.web.ServletTestExecutionListener,org.springframework.test. context.support.DependencyInjectionTestExecutionListener,org.springframework.test.context.support.DirtiesContextTestExecutionListener,org.springframework.test.context.transaction.TransactionalTestExecutionListener,org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener] INFO:org.springframework.test. context.support.DefaultTestContextBootstrapper - 无法实例化TestExecutionListener [org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener].指定自定义侦听器类或使默认侦听器类(及其所需的依赖项)可用.违规类:[org/springframework/transaction/interceptor/TransactionAttribute] INFO:org.springframework.test.context.support.DefaultTestContextBootstrapper - 无法实例化TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener].指定自定义侦听器类或使默认侦听器类(及其所需的依赖项)可用.违规类:[org/springframework/transaction/interceptor/TransactionAttributeSource] INFO:org.springframework.test.context.support.DefaultTestContextBootstrapper - 使用TestExecutionListeners:[org.springframework.test.context.web.ServletTestExecutionListener@76959acc,org.springframework. test.context.support.DependencyInjectionTestExecutionListener@57e603e6,org.springframework.test.context.support.DirtiesContextTestExecutionListener@3e0a1e1f]

这是目标片段

@Service 

public class PipApps {

@Resource( name = …

帮助 - 我还能做些什么来解决这个错误？org.springframework.web.HttpMediaTypeNotAcceptableException ::无法找到可接受的表示.

我认为我的项目已正确配置以处理json restful请求.在过去的几天里,我已阅读并应用各种建议无济于事.关于我应该采取哪些不同的做法,还有其他想法吗？

我使用的是Spring MVC 4.1.5和com.fasterxml 2.5.1.

我的pom.xml的一部分

 <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.5.1</version>
    <type>bundle</type>
 </dependency>
 <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.5.1</version>
    <type>bundle</type>
 </dependency>
 <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.5.1</version>
    <type>bundle</type>
 </dependency>

这是我的web.xml的一部分

<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<!-- Processes application requests -->
<servlet>
    <servlet-name>appServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/spring/appServlet/servlet-context.xml
        </param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>appServlet</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

这是我的servlet-context.xml的一部分

<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />

<!-- Handles HTTP …

以下 thymeleaf 标记缺少什么：

<tr th:fragment="row" th:with="defaultAttrs='placeholder=\'' + ${placeholder} + '\''">                            
    <td>
        <input th:attr="${attrs ?: defaultAttrs}" />
    </td>
    ...
</tr>

来自

<th:block th:include="row::row(attrs='value=\'*{prodName}\', minLength=\'.{2, 16}\', required, title=\'starts with an alphabet 2 and 8\' placeholder=\'Product name\'')" />

这是产生这个错误：

Could not parse as assignation sequence: "${attrs ?: defaultAttrs}"

在一个不相关的注释中，不得不对异常消息进行双重考虑，以了解赋值而不是赋值一词的有趣用法

我想知道当我将 threadlocal.set() 设置为 32 个元素的集合时，它是如何没有存储数据的。ThreadLocal.get() 总是返回 null；并且对应的 FutureTask 对象有一个结果属性 = NullPointerException。知道为什么 ThreadLocal 无法存储集合项吗？

public class MyCallable<T> implements Callable<Collection<T>> {

    public MyCallable( Collection<T> items ){
        tLocal = new ThreadLocal<Collection<T>>();
        tLocal.set( items );                    //SETS NULL ALTHOUGH the PARAMETER CONTAINS 32 ITEMS
    }

    @Override
    @SuppressWarnings("unchecked")
    public Collection<T> call() throws Exception {
        synchronized( lock ){
            ArrayList<T> _items = new ArrayList<T>();
            ArrayList<T> _e = ( ArrayList<T> ) tLocal.get();   //RETURNS NULL
            for( T item : _e ){
                _items = getPValue( item ));
            }
            return _items ; …

public class Foo<T extends Bar>{
    private Class<T> _type;
    public Foo( Class<T> _type ){
        this._type = _type;
    }
    public Collection<T> hypothetical( List<T> items ){ //PROBLEMATIC
        return dostuffWithItems( items );
    }
}

用法:

Foo<? extends ChildBar> foo = new Foo<ChildBar>( ChildBar.class );
List<ChildBar> items = ( List<ChildBar> ) foo.hypothetical( new ArrayList<ChildBar>() ); //COMPILER ERROR: The method hypothetical(List<capture#2-of ?>) in the type Foo<capture#2-of ?> is not applicable for the arguments (List<ChildBar>)

编译器将接受
转换List<ChildBar> items参数List<?>
或将hypothetical( List<T> items )签名更改为 …