9赞

Amazon DynamoDB Local - 未知错误,异常或失败

作者：谢谢巷议 | 2023-09-10 19:56

如何解决《AmazonDynamoDBLocal-未知错误,异常或失败》经验，为你挑选了1个好方法。

我必须测试一个严重依赖Amazon的DynamoDB的应用程序.我希望测试能够单独运行,这就是我选择DynamoDB Local的原因.jar.我知道最近的更新,使我们能够在没有外部bash命令调用的情况下运行它.但是,当我尝试运行此处指定的示例时,我得到以下stacktrace:

Exception in thread "main" com.amazonaws.AmazonServiceException: The request processing has failed because of an unknown error, exception or failure. (Service: AmazonDynamoDBv2; Status Code: 500; Error Code: InternalFailure; Request ID: cab7a550-aaa6-4bfe-a591-0b255481cc14)
    at com.amazonaws.http.AmazonHttpClient.handleErrorResponse(AmazonHttpClient.java:1275)
    at com.amazonaws.http.AmazonHttpClient.executeOneRequest(AmazonHttpClient.java:873)
    at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:576)
    at com.amazonaws.http.AmazonHttpClient.doExecute(AmazonHttpClient.java:362)
    at com.amazonaws.http.AmazonHttpClient.executeWithTimer(AmazonHttpClient.java:328)
    at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:307)
    at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.invoke(AmazonDynamoDBClient.java:1805)
    at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.listTables(AmazonDynamoDBClient.java:1223)
    at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.listTables(AmazonDynamoDBClient.java:1235)

这是我试图运行的代码:

public static void main( String[] args ) throws Exception
    {
        AmazonDynamoDB dynamodb = null;

        DynamoDBProxyServer server = null;
        final String[] localArgs = { "-inMemory", "-port", "13005" };
        server = ServerRunner.createServerFromCommandLineArgs(localArgs);
        server.start();

        BasicAWSCredentials auth = new BasicAWSCredentials("key", "secret");
        dynamodb = new AmazonDynamoDBClient(auth);
        dynamodb.setEndpoint("http://127.0.0.1:13005");

        // use the DynamoDB API over HTTP
        System.out.println(dynamodb.listTables());

        // Stop the DynamoDB Local endpoint
        if(server != null) {
            server.stop();
        }
    }



我观察到,如果我尝试从Java程序本身完全运行它,那就是抛出异常并且指定的端口不再可用时(抛出错误声明此端口被占用).但是,如果我从命令提示符启动DynamoDB Local并仅将Java程序用作访问客户端,那么everthing运行正常.有什么建议？


1> Jayson Minar..：
DynamoDBLocal至少存在2个问题.解决这两个问题,您将运行嵌入式DynamoDB.

首先,-port参数无法正常工作.所以Jetty没有设置在您期望的端口上.而是将端口51205(或随机？)之类的东西设置为Jetty侦听器作为默认端口.

这是我的启动服务器的代码,避免内置的命令行解析,无论如何都更好......以这种方式启动服务器后,http:// localhost:19444/shell工作,所以Jetty很好.但是,您可能会遇到Sqlite4java的另一个问题(请参阅代码块之后).

注意:代码是Kotlin,但Java非常相似.我也配置了SLF4j,不要让ServerRunner类破坏日志记录,所以这是更好的启动服务器的方式以及ServerRunner内部的功能.



class TestAccountManager {
    companion object {
        private val localDbPort = 19444

        private lateinit var localDb: DynamoDBProxyServer
        private lateinit var dbClient: AmazonDynamoDBClient

        @BeforeClass @JvmStatic fun setup() {
            System.setProperty("org.eclipse.jetty.util.log.class", "org.eclipse.jetty.util.log.Slf4jLog")
            localDb = DynamoDBProxyServer(localDbPort, LocalDynamoDBServerHandler(
                    LocalDynamoDBRequestHandler(0, true, null, true, true), null)
            )
            localDb.start()

            val auth = BasicAWSCredentials("fakeKey", "fakeSecret")
            dbClient = AmazonDynamoDBClient(auth)
            dbClient.signerRegionOverride = "us-east-1"
            dbClient.setEndpoint("http://localhost:$localDbPort")
        }

        @AfterClass @JvmStatic fun teardown() {
           localDb.stop()
        }
    }

    @Test fun testSomething() {
        dbClient.listTables().tableNames.forEach {
            println(it)
        }
    }
}


获得此代码后,您现在正在预期的端口上运行.  

现在您可能遇到第二个错误,例如Sqlite4java没有为您的平台找到正确的二进制文件.对于某些版本的Mac OSX,它将生成实际上不存在的二进制文件名.并且DynamoDBLocal强制隐藏所有Sqlite4java日志记录(不可能覆盖它),因此您将看不到它.  

您可以通过下载分发,解压缩然后运行来测试sqlite库:

java -jar sqlite4java-1.0.392.jar -d


它将报告它尝试加载的内容,以及它是如何失败的.你只需要在Gradle,Maven或你放置它的地方找到你系统上的JAR.我的错误输出是:

sqlite4java 392
160212:002049.833 FINE [sqlite] Internal: loading library
160212:002049.834 FINE [sqlite] Internal: java.library.path=/Users/jminard/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.
160212:002049.834 FINE [sqlite] Internal: sqlite4java.library.path=null
160212:002049.834 FINE [sqlite] Internal: cwd=/Users/jminard/DEV/Collokia/repos/collokia-web-back/.
160212:002049.834 FINE [sqlite] Internal: default path=/Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d
160212:002049.834 FINE [sqlite] Internal: forced path=null
160212:002049.834 FINE [sqlite] Internal: os.name=mac os x; os=osx
160212:002049.835 FINE [sqlite] Internal: os.arch=x86_64
160212:002049.835 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx-x86_64-1.0.392.dylib
160212:002049.835 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx-amd64-1.0.392.dylib
160212:002049.835 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx-1.0.392.dylib
160212:002049.835 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-1.0.392.dylib
160212:002049.836 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx-x86_64-d-1.0.392.dylib
160212:002049.836 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx-amd64-d-1.0.392.dylib
160212:002049.836 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx-d-1.0.392.dylib
160212:002049.836 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-d-1.0.392.dylib
160212:002049.836 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx-x86_64.dylib
160212:002049.836 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx-amd64.dylib
160212:002049.836 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx.dylib
160212:002049.837 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java.dylib
160212:002049.837 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx-x86_64-d.dylib
160212:002049.837 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx-amd64-d.dylib
160212:002049.837 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-osx-d.dylib
160212:002049.837 FINE [sqlite] Internal: checking /Users/jminard/.gradle/caches/modules-2/files-2.1/com.almworks.sqlite4java/sqlite4java/1.0.392/d6234e08ff4e1607ff5321da2579571f05ff778d/libsqlite4java-d.dylib
160212:002049.837 FINE [sqlite] Internal: trying to load sqlite4java-osx-x86_64-1.0.392
160212:002049.838 FINE [sqlite] Internal: cannot load sqlite4java-osx-x86_64-1.0.392: java.lang.UnsatisfiedLinkError: no sqlite4java-osx-x86_64-1.0.392 in java.library.path
160212:002049.838 FINE [sqlite] Internal: trying to load sqlite4java-osx-amd64-1.0.392
160212:002049.839 FINE [sqlite] Internal: cannot load sqlite4java-osx-amd64-1.0.392: java.lang.UnsatisfiedLinkError: no sqlite4java-osx-amd64-1.0.392 in java.library.path
160212:002049.839 FINE [sqlite] Internal: trying to load sqlite4java-osx-1.0.392
160212:002049.840 FINE [sqlite] Internal: cannot load sqlite4java-osx-1.0.392: java.lang.UnsatisfiedLinkError: no sqlite4java-osx-1.0.392 in java.library.path
160212:002049.840 FINE [sqlite] Internal: trying to load sqlite4java-1.0.392
160212:002049.841 FINE [sqlite] Internal: cannot load sqlite4java-1.0.392: java.lang.UnsatisfiedLinkError: no sqlite4java-1.0.392 in java.library.path
160212:002049.841 FINE [sqlite] Internal: trying to load sqlite4java-osx-x86_64-d-1.0.392
160212:002049.842 FINE [sqlite] Internal: cannot load sqlite4java-osx-x86_64-d-1.0.392: java.lang.UnsatisfiedLinkError: no sqlite4java-osx-x86_64-d-1.0.392 in java.library.path
160212:002049.842 FINE [sqlite] Internal: trying to load sqlite4java-osx-amd64-d-1.0.392
160212:002049.842 FINE [sqlite] Internal: cannot load sqlite4java-osx-amd64-d-1.0.392: java.lang.UnsatisfiedLinkError: no sqlite4java-osx-amd64-d-1.0.392 in java.library.path
160212:002049.843 FINE [sqlite] Internal: trying to load sqlite4java-osx-d-1.0.392
160212:002049.843 FINE [sqlite] Internal: cannot load sqlite4java-osx-d-1.0.392: java.lang.UnsatisfiedLinkError: no sqlite4java-osx-d-1.0.392 in java.library.path
160212:002049.843 FINE [sqlite] Internal: trying to load sqlite4java-d-1.0.392
160212:002049.844 FINE [sqlite] Internal: cannot load sqlite4java-d-1.0.392: java.lang.UnsatisfiedLinkError: no sqlite4java-d-1.0.392 in java.library.path
160212:002049.844 FINE [sqlite] Internal: trying to load sqlite4java-osx-x86_64
160212:002049.845 FINE [sqlite] Internal: cannot load sqlite4java-osx-x86_64: java.lang.UnsatisfiedLinkError: no sqlite4java-osx-x86_64 in java.library.path
160212:002049.845 FINE [sqlite] Internal: trying to load sqlite4java-osx-amd64
160212:002049.845 FINE [sqlite] Internal: cannot load sqlite4java-osx-amd64: java.lang.UnsatisfiedLinkError: no sqlite4java-osx-amd64 in java.library.path
160212:002049.845 FINE [sqlite] Internal: trying to load sqlite4java-osx
160212:002049.846 FINE [sqlite] Internal: cannot load sqlite4java-osx: java.lang.UnsatisfiedLinkError: no sqlite4java-osx in java.library.path
160212:002049.846 FINE [sqlite] Internal: trying to load sqlite4java
160212:002049.847 FINE [sqlite] Internal: cannot load sqlite4java: java.lang.UnsatisfiedLinkError: no sqlite4java in java.library.path
160212:002049.847 FINE [sqlite] Internal: trying to load sqlite4java-osx-x86_64-d
160212:002049.848 FINE [sqlite] Internal: cannot load sqlite4java-osx-x86_64-d: java.lang.UnsatisfiedLinkError: no sqlite4java-osx-x86_64-d in java.library.path
160212:002049.848 FINE [sqlite] Internal: trying to load sqlite4java-osx-amd64-d
160212:002049.849 FINE [sqlite] Internal: cannot load sqlite4java-osx-amd64-d: java.lang.UnsatisfiedLinkError: no sqlite4java-osx-amd64-d in java.library.path
160212:002049.849 FINE [sqlite] Internal: trying to load sqlite4java-osx-d
160212:002049.849 FINE [sqlite] Internal: cannot load sqlite4java-osx-d: java.lang.UnsatisfiedLinkError: no sqlite4java-osx-d in java.library.path
160212:002049.850 FINE [sqlite] Internal: trying to load sqlite4java-d
160212:002049.850 FINE [sqlite] Internal: cannot load sqlite4java-d: java.lang.UnsatisfiedLinkError: no sqlite4java-d in java.library.path
Error: cannot load SQLite
java.lang.UnsatisfiedLinkError: no sqlite4java-osx-x86_64-1.0.392 in java.library.path
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1864)
    at java.lang.Runtime.loadLibrary0(Runtime.java:870)
    at java.lang.System.loadLibrary(System.java:1122)
    at com.almworks.sqlite4java.Internal.tryLoadFromSystemPath(Internal.java:352)
    at com.almworks.sqlite4java.Internal.loadLibraryX(Internal.java:124)
    at com.almworks.sqlite4java.SQLite.main(SQLite.java:368)


如果您有关于动态库加载的错误,请阅读以下内容以了解如何解决:


在Mac OS X NetBeans上使用sqlite4java Jar的UnsatisfiedLinkError 
在Mac OS X上使用sqlite4java Jar的UnsatisfiedLinkError 
并且在Mac OS X上使用java命令与此DynamoDBLocal Run DynamoDB Local特别相关.  
https://groups.google.com/forum/#!topic/sqlite4java/9J1lmCuoKLA
https://groups.google.com/forum/#!topic/sqlite4java/jhwt44nYGvw


似乎可靠运行的唯一答案是:


将已下载的sqlite4java发行版中的库添加到已知位置并设置系统属性java.library.path
将下载的sqlite4java发行版中的库添加到/Library/Java/Extensions(仅限macOS)


其中我做了第一个选项,并将库添加到项目中,并确保构建添加-Djava.library.path=./lib/sqlite4java动态库解压缩的位置.对于更有弹性的测试,您可以java.library.path使用此技巧以编程方式在代码中进行设置(否则在代码中设置时会被忽略):http://blog.cedarsoft.com/2010/11/setting-java-library-path-programmatically/

DynamoDBLocal隐藏所有Sqlite错误是邪恶的,因此您必须进行调试以查找静默失败.该库充满了调整日志记录级别并使其难以调试的内容,因为它们会破坏您查看错误的能力.例如,每次打开SqlLite文件(类SQLiteDBAccess)时:

LocalDBUtils.setLog4jToUtilsLogging("com.almworks.sqlite4java");
LocalDBUtils.setLog4jToUtilsLogging("com.almworks.sqlite4java.Internal");
java.util.logging.Logger.getLogger("com.almworks.sqlite4java").setLevel(Level.OFF);
java.util.logging.Logger.getLogger("com.almworks.sqlite4java.Internal").setLevel(Level.OFF);


关闭注:我在看的替代品,这是不是世界上最好的东西建,看着DynamoDbLocal和决定做它给我很缺乏信心的代码.  Alternator或Jcabi  -  Dynamo Mock是我的下一个.



    

    

    
        推荐阅读
        
            
                                
                    
                        程序员
                        向用户询问H.
                    

                    
                                                
                        如何解决《向用户询问H.》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        在交互式地图上叠加shapefile或栅格
                    

                    
                                                
                            
                        
                                                
                        如何解决《在交互式地图上叠加shapefile或栅格》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        Visual Studio 2015表示'演员是多余的'.为什么？
                    

                    
                                                
                        如何解决《VisualStudio2015表示'演员是多余的'.为什么？》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        调用连接没有匹配功能 -  Qt 5.5
                    

                    
                                                
                        如何解决《调用连接没有匹配功能-Qt5.5》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        如何在ios中使用UIImageView + AFNetworking异步加载图像
                    

                    
                                                
                        如何解决《如何在ios中使用UIImageView+AFNetworking异步加载图像》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        不使用String API的数字位数
                    

                    
                                                
                        如何解决《不使用StringAPI的数字位数》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        反转HTML标签,了解任务
                    

                    
                                                
                        如何解决《反转HTML标签,了解任务》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        当使用Karma运行时,使用Immutable.js的Mocha测试失败
                    

                    
                                                
                        如何解决《当使用Karma运行时,使用Immutable.js的Mocha测试失败》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        将Facebook广告系列目标与洞察操作类型相匹配
                    

                    
                                                
                            
                        
                                                
                        如何解决《将Facebook广告系列目标与洞察操作类型相匹配》经验，为你挑选了0个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        Sublime文本绑定鼠标按钮以跳转到光标
                    

                    
                                                
                        如何解决《Sublime文本绑定鼠标按钮以跳转到光标》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        prose.io"未找到"错误消息
                    

                    
                                                
                            
                        
                                                
                        如何解决《prose.io"未找到"错误消息》经验，为你挑选了0个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        在three.js中映射一颗行星？
                    

                    
                                                
                        如何解决《在three.js中映射一颗行星？》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        如何在TCPDF中正确生成GS1-128(以前的EAN-128)条形码
                    

                    
                                                
                            
                        
                                                
                        如何解决《如何在TCPDF中正确生成GS1-128(以前的EAN-128)条形码》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        在图像上渲染任意文本是否有任何安全隐患？
                    

                    
                                                
                        如何解决《在图像上渲染任意文本是否有任何安全隐患？》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        GlusterFS或Ceph作为Hadoop的后端
                    

                    
                                                
                        如何解决《GlusterFS或Ceph作为Hadoop的后端》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        副本集配置无效或我们不是它的成员,在kubernetes中运行
                    

                    
                                                
                        如何解决《副本集配置无效或我们不是它的成员,在kubernetes中运行》经验，为你挑选了0个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        如何在Spring Boot中的application.yml中定义默认空值
                    

                    
                                                
                        如何解决《如何在SpringBoot中的application.yml中定义默认空值》经验，为你挑选了0个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        相当于Java 7中的map(来自haskell)
                    

                    
                                                
                        如何解决《相当于Java7中的map(来自haskell)》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        将二进制值转换为十进制矩阵
                    

                    
                                                
                        如何解决《将二进制值转换为十进制矩阵》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                                
                    
                        程序员
                        Yii findAll()导致内存问题
                    

                    
                                                
                        如何解决《YiifindAll()导致内存问题》经验，为你挑选了1个好方法。 ...
                        [详细]
                    
                    

                


                

            
        
    

    
        吐了个 "CAO" !
        
            
                吐个槽吧,看都看了
            
            
                
                                        会员登录 | 用户注册
























    

    
        
            
            
                
                    
                
            

            
                谢谢巷议            

            
                这个屌丝很懒，什么也没留下！            
            
            

                                
                    
                    关注作者
                            

        
    


    
        Tags | 热门标签
        
            
                                
                    actionscrip
                
                                
                    bash
                
                                
                    c#
                
                                
                    c++
                
                                
                    c语言
                
                                
                    erlang
                
                                
                    flutter
                
                                
                    go
                
                                
                    golang
                
                                
                    java
                
                                
                    javascript
                
                                
                    lua
                
                                
                    node.js
                
                                
                    perl
                
                                
                    php
                
                                
                    python
                
                                
                    scala
                
                                
                    typescript
                
                                
            
        
    


    
        RankList | 热门文章
        
            
                                
                    1RENAME语句实际上如何工作？
                
                                
                    2在ArrayAdapter中重写getDropDownView时的样式问题
                
                                
                    3从DynamoDB导出数据
                
                                
                    4中型设备上的Bootstrap 3行中断
                
                                
                    5在Django中搜索并获取匹配的LDAP用户列表
                
                                
                    6InnoSetup  - 代码签名证书
                
                                
                    7如何从ASP.NET MVC属性中获取枚举值？
                
                                
                    8如何将java泛型转换为Delphi
                
                                
                    9如何使用Spring框架遍历JSP中的列表
                
                                
                    10重新连接到asp.net MVC4应用程序中的Servicestack会话
                
                                
                    11为什么CLISP无法使用未加工名称调用某些函数？
                
                                
                    12使用Boost.Units定义百分比
                
                                
                    13在WinRT应用程序中使用SQLite时出现异常
                
                                
                    14jquery .on('input')不会仅在ie8中被触发
                
                                
                    15如何检查字符是否为元音？
                
                                
                    16如何从Sql Server中的TimeZoneOffset了解TimeZone StandardName或DayLightName
                
                                
                    17INSERT INTO表IF表存在,否则CREATE TABLE
                
                                
                    18Chart.js和长标签
                
                                
                    19在ggplot中生成成对的堆积条形图(仅对某些变量使用position_dodge)
                
                                
                    20Django中带有data-*属性的选项标签,带有清脆的表单