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我正在构建 JSR352 (Batch Applications for the Java Platform) 的演示在 Java SE 下，使用 JBoss 实现JBeret。我想为这项工作运行集成测试。在此批处理作业中，有 3 个组件:
io.mincong.batch.MyItemReaderio.mincong.batch.MyItemProcessorio.mincong.batch.MyItemWriter它们都是带有注解@Named的命名bean，例如
@Named
public class MyItemProcessor implements ItemProcessor {
// ...
}
多亏了这个注释，我可以使用作业类而无需在我的作业文件 myJob.xml 中键入包名称前缀 io.mincong.batch。 这在 Java EE 容器中运行良好，例如 WildFly 10。但是，在 Java SE 中，它不再起作用，我必须添加包前缀。这里的作业 xml myJob.xml :
<?xml version="1.0" encoding="UTF-8"?>
<job id="myJob" xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/jobXML_1_0.xsd"
version="1.0">
<step id="printID">
<chunk item-count="5">
<!-- This works :
<reader ref="io.mincong.batch.MyItemReader"/>
<processor ref="io.mincong.batch.MyItemProcessor"/>
<writer ref="io.mincong.batch.MyItemWriter"/> -->
<!-- This doesn't work -->
<reader ref="myItemReader"/>
<processor ref="myItemProcessor"/>
<writer ref="myItemWriter"/>
</chunk>
</step>
</job>
你可以在附件中找到2个mvn install log，有包前缀和没有包前缀。换句话说，使用和不使用 @Named。为什么会发生这个错误？我是否缺少一些依赖项？有什么想法吗？
你也可以在下面看到我的 pom.xml。附加信息:
Mincongs-MBP:batch mincong$ mvn clean install
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building batch 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ batch ---
[INFO] Deleting /Users/mincong/Documents/workspace/batch/target
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ batch ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 2 resources
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ batch ---
[INFO] Compiling 3 source files to /Users/mincong/Documents/workspace/batch/target/classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ batch ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:testCompile (default-testCompile) @ batch ---
[INFO] Compiling 1 source file to /Users/mincong/Documents/workspace/batch/target/test-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ batch ---
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ batch ---
[INFO] Building jar: /Users/mincong/Documents/workspace/batch/target/batch.jar
[INFO]
[INFO] --- maven-failsafe-plugin:2.17:integration-test (default) @ batch ---
[INFO] Failsafe report directory: /Users/mincong/Documents/workspace/batch/target/failsafe-reports
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running io.mincong.batch.JobIT
Jun 26, 2016 1:21:16 PM org.jboss.weld.bootstrap.WeldStartup <clinit>
INFO: WELD-000900: 2.3.4 (Final)
Jun 26, 2016 1:21:16 PM org.jboss.weld.environment.deployment.discovery.DiscoveryStrategyFactory create
INFO: WELD-ENV-000020: Using jandex for bean discovery
Jun 26, 2016 1:21:16 PM org.jboss.weld.bootstrap.WeldStartup startContainer
INFO: WELD-000101: Transactional services not available. Injection of @Inject UserTransaction not available. Transactional observers will be invoked synchronously.
Jun 26, 2016 1:21:16 PM org.jboss.weld.bootstrap.MissingDependenciesRegistry handleResourceLoadingException
INFO: WELD-000119: Not generating any bean definitions from org.jberet.support.io.KafkaItemReader because of underlying class loading error: Type org.apache.kafka.clients.consumer.KafkaConsumer not found. If this is unexpected, enable DEBUG logging to see the full error.
Jun 26, 2016 1:21:16 PM org.jboss.weld.bootstrap.MissingDependenciesRegistry handleResourceLoadingException
INFO: WELD-000119: Not generating any bean definitions from org.jberet.support.io.KafkaItemWriter because of underlying class loading error: Type org.apache.kafka.clients.producer.KafkaProducer not found. If this is unexpected, enable DEBUG logging to see the full error.
Jun 26, 2016 1:21:16 PM org.jboss.weld.bootstrap.MissingDependenciesRegistry handleResourceLoadingException
INFO: WELD-000119: Not generating any bean definitions from org.jberet.support.io.HornetQItemReader because of underlying class loading error: Type org.hornetq.api.core.HornetQException not found. If this is unexpected, enable DEBUG logging to see the full error.
Jun 26, 2016 1:21:16 PM org.jboss.weld.bootstrap.MissingDependenciesRegistry handleResourceLoadingException
INFO: WELD-000119: Not generating any bean definitions from org.jberet.support.io.JasperReportsBatchlet because of underlying class loading error: Type net.sf.jasperreports.engine.data.JRAbstractTextDataSource not found. If this is unexpected, enable DEBUG logging to see the full error.
Jun 26, 2016 1:21:16 PM org.jboss.weld.bootstrap.MissingDependenciesRegistry handleResourceLoadingException
INFO: WELD-000119: Not generating any bean definitions from org.jberet.support.io.HornetQItemWriter because of underlying class loading error: Type org.hornetq.api.core.HornetQException not found. If this is unexpected, enable DEBUG logging to see the full error.
Jun 26, 2016 1:21:17 PM org.jboss.weld.environment.se.WeldContainer initialize
INFO: WELD-ENV-002003: Weld SE container STATIC_INSTANCE initialized
Jun 26, 2016 1:21:17 PM io.mincong.batch.JobIT setupJobEnv
INFO: setup env finished.
Jun 26, 2016 1:21:17 PM io.mincong.batch.JobIT shouldStart
INFO: executionId=1
Jun 26, 2016 1:21:17 PM org.jberet.runtime.runner.ChunkRunner run
ERROR: item-count=10, time-limit=0, skip-limit=-1, skipCount=0, retry-limit=-1, retryCount=0
Jun 26, 2016 1:21:17 PM org.jberet.runtime.runner.ChunkRunner run
ERROR: JBERET000007: Failed to run job myJob, printID, org.jberet.job.model.Chunk@4256e00a
java.lang.IllegalStateException: JBERET000600: Failed to create artifact with ref name myItemReader. Ensure CDI beans.xml is present and batch.xml, if any, is configured properly.
at org.jberet.runtime.context.JobContextImpl.createArtifact(JobContextImpl.java:185)
at org.jberet.runtime.runner.AbstractRunner.createArtifact(AbstractRunner.java:156)
at org.jberet.runtime.runner.ChunkRunner.run(ChunkRunner.java:134)
at org.jberet.runtime.runner.StepExecutionRunner.runBatchletOrChunk(StepExecutionRunner.java:226)
at org.jberet.runtime.runner.StepExecutionRunner.run(StepExecutionRunner.java:147)
at org.jberet.runtime.runner.CompositeExecutionRunner.runStep(CompositeExecutionRunner.java:164)
at org.jberet.runtime.runner.CompositeExecutionRunner.runFromHeadOrRestartPoint(CompositeExecutionRunner.java:88)
at org.jberet.runtime.runner.JobExecutionRunner.run(JobExecutionRunner.java:60)
at org.jberet.spi.JobExecutor$1.run(JobExecutor.java:99)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: JBERET000600: Failed to create artifact with ref name myItemReader. Ensure CDI beans.xml is present and batch.xml, if any, is configured properly.
at org.jberet.creation.ArtifactFactoryWrapper.getClassFromBatchXmlOrClassLoader(ArtifactFactoryWrapper.java:65)
at org.jberet.creation.ArtifactFactoryWrapper.create(ArtifactFactoryWrapper.java:41)
at org.jberet.runtime.context.JobContextImpl.createArtifact(JobContextImpl.java:183)
... 11 more
Caused by: java.lang.ClassNotFoundException: myItemReader
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.jberet.creation.ArtifactFactoryWrapper.getClassFromBatchXmlOrClassLoader(ArtifactFactoryWrapper.java:63)
... 13 more
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 4.416 sec <<< FAILURE! - in io.mincong.batch.JobIT
shouldStart(io.mincong.batch.JobIT) Time elapsed: 4.366 sec <<< FAILURE!
java.lang.AssertionError: expected:<COMPLETED> but was:<FAILED>
at org.junit.Assert.fail(Assert.java:91)
at org.junit.Assert.failNotEquals(Assert.java:645)
at org.junit.Assert.assertEquals(Assert.java:126)
at org.junit.Assert.assertEquals(Assert.java:145)
at io.mincong.batch.JobIT.shouldStart(JobIT.java:47)
Weld SE container STATIC_INSTANCE shut down by shutdown hook
Results :
Failed tests:
JobIT.shouldStart:47 expected:<COMPLETED> but was:<FAILED>
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO]
[INFO] --- maven-failsafe-plugin:2.17:verify (default) @ batch ---
[INFO] Failsafe report directory: /Users/mincong/Documents/workspace/batch/target/failsafe-reports
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.863 s
[INFO] Finished at: 2016-06-26T13:21:20+02:00
[INFO] Final Memory: 31M/273M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-failsafe-plugin:2.17:verify (default) on project batch: There are test failures.
[ERROR]
[ERROR] Please refer to /Users/mincong/Documents/workspace/batch/target/failsafe-reports for the individual test results.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
Mincongs-MBP:batch mincong$ mvn clean install
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building batch 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ batch ---
[INFO] Deleting /Users/mincong/Documents/workspace/batch/target
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ batch ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 2 resources
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ batch ---
[INFO] Compiling 3 source files to /Users/mincong/Documents/workspace/batch/target/classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ batch ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:testCompile (default-testCompile) @ batch ---
[INFO] Compiling 1 source file to /Users/mincong/Documents/workspace/batch/target/test-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ batch ---
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ batch ---
[INFO] Building jar: /Users/mincong/Documents/workspace/batch/target/batch.jar
[INFO]
[INFO] --- maven-failsafe-plugin:2.17:integration-test (default) @ batch ---
[INFO] Failsafe report directory: /Users/mincong/Documents/workspace/batch/target/failsafe-reports
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running io.mincong.batch.JobIT
Jun 26, 2016 1:25:25 PM org.jboss.weld.bootstrap.WeldStartup <clinit>
INFO: WELD-000900: 2.3.4 (Final)
Jun 26, 2016 1:25:25 PM org.jboss.weld.environment.deployment.discovery.DiscoveryStrategyFactory create
INFO: WELD-ENV-000020: Using jandex for bean discovery
Jun 26, 2016 1:25:26 PM org.jboss.weld.bootstrap.WeldStartup startContainer
INFO: WELD-000101: Transactional services not available. Injection of @Inject UserTransaction not available. Transactional observers will be invoked synchronously.
Jun 26, 2016 1:25:26 PM org.jboss.weld.bootstrap.MissingDependenciesRegistry handleResourceLoadingException
INFO: WELD-000119: Not generating any bean definitions from org.jberet.support.io.KafkaItemReader because of underlying class loading error: Type org.apache.kafka.clients.consumer.KafkaConsumer not found. If this is unexpected, enable DEBUG logging to see the full error.
Jun 26, 2016 1:25:26 PM org.jboss.weld.bootstrap.MissingDependenciesRegistry handleResourceLoadingException
INFO: WELD-000119: Not generating any bean definitions from org.jberet.support.io.KafkaItemWriter because of underlying class loading error: Type org.apache.kafka.clients.producer.KafkaProducer not found. If this is unexpected, enable DEBUG logging to see the full error.
Jun 26, 2016 1:25:26 PM org.jboss.weld.bootstrap.MissingDependenciesRegistry handleResourceLoadingException
INFO: WELD-000119: Not generating any bean definitions from org.jberet.support.io.HornetQItemReader because of underlying class loading error: Type org.hornetq.api.core.HornetQException not found. If this is unexpected, enable DEBUG logging to see the full error.
Jun 26, 2016 1:25:26 PM org.jboss.weld.bootstrap.MissingDependenciesRegistry handleResourceLoadingException
INFO: WELD-000119: Not generating any bean definitions from org.jberet.support.io.JasperReportsBatchlet because of underlying class loading error: Type net.sf.jasperreports.engine.data.JRAbstractTextDataSource not found. If this is unexpected, enable DEBUG logging to see the full error.
Jun 26, 2016 1:25:26 PM org.jboss.weld.bootstrap.MissingDependenciesRegistry handleResourceLoadingException
INFO: WELD-000119: Not generating any bean definitions from org.jberet.support.io.HornetQItemWriter because of underlying class loading error: Type org.hornetq.api.core.HornetQException not found. If this is unexpected, enable DEBUG logging to see the full error.
Jun 26, 2016 1:25:26 PM org.jboss.weld.environment.se.WeldContainer initialize
INFO: WELD-ENV-002003: Weld SE container STATIC_INSTANCE initialized
Jun 26, 2016 1:25:26 PM io.mincong.batch.JobIT setupJobEnv
INFO: setup env finished.
Jun 26, 2016 1:25:26 PM io.mincong.batch.JobIT shouldStart
INFO: executionId=1
Jun 26, 2016 1:25:26 PM io.mincong.batch.MyItemWriter writeItems
INFO: 0
Jun 26, 2016 1:25:26 PM io.mincong.batch.MyItemWriter writeItems
INFO: 1
...
Jun 26, 2016 1:25:26 PM io.mincong.batch.MyItemWriter writeItems
INFO: 95
Jun 26, 2016 1:25:26 PM io.mincong.batch.MyItemWriter writeItems
INFO: 96
Jun 26, 2016 1:25:26 PM io.mincong.batch.MyItemWriter writeItems
INFO: 97
Jun 26, 2016 1:25:26 PM io.mincong.batch.MyItemWriter writeItems
INFO: 98
Jun 26, 2016 1:25:26 PM io.mincong.batch.MyItemWriter writeItems
INFO: 99
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.304 sec - in io.mincong.batch.JobIT
Weld SE container STATIC_INSTANCE shut down by shutdown hook
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO]
[INFO] --- maven-failsafe-plugin:2.17:verify (default) @ batch ---
[INFO] Failsafe report directory: /Users/mincong/Documents/workspace/batch/target/failsafe-reports
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) @ batch ---
[INFO] Installing /Users/mincong/Documents/workspace/batch/target/batch.jar to /Users/mincong/.m2/repository/io/github/mincongh/batch/0.0.1-SNAPSHOT/batch-0.0.1-SNAPSHOT.jar
[INFO] Installing /Users/mincong/Documents/workspace/batch/pom.xml to /Users/mincong/.m2/repository/io/github/mincongh/batch/0.0.1-SNAPSHOT/batch-0.0.1-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 5.810 s
[INFO] Finished at: 2016-06-26T13:25:28+02:00
[INFO] Final Memory: 32M/284M
[INFO] ------------------------------------------------------------------------
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>io.github.mincongh</groupId>
<artifactId>batch</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>batch</name>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<maven.compiler.testSource>1.7</maven.compiler.testSource>
<maven.compiler.testTarget>1.7</maven.compiler.testTarget>
<failOnMissingWebXml>false</failOnMissingWebXml>
<arquillian.version>1.0.0.Alpha5</arquillian.version>
<wildfly.version>10.0.0.Final</wildfly.version>
<jberet.version>1.3.0.Beta2</jberet.version>
</properties>
<build>
<finalName>batch</finalName>
<plugins>
<plugin>
<artifactId>maven-failsafe-plugin</artifactId>
<version>2.17</version>
<!-- enable execution to run an integration test -->
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
<configuration>
<systemPropertyVariables>
<jberet.tmp.dir>${project.build.directory}${file.separator}tmp</jberet.tmp.dir>
</systemPropertyVariables>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.jboss.spec</groupId>
<artifactId>jboss-javaee-7.0</artifactId>
<version>1.0.0.Final</version>
<type>pom</type>
<scope>provided</scope>
</dependency>
<!-- Write test in JUnit 4.x -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.logging</groupId>
<artifactId>jboss-logging</artifactId>
<version>3.3.0.Final</version>
<scope>provided</scope>
</dependency>
<!-- jberet dependencies -->
<dependency>
<groupId>org.jboss.spec.javax.batch</groupId>
<artifactId>jboss-batch-api_1.0_spec</artifactId>
<version>1.0.0.Final</version>
</dependency>
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.jboss.spec.javax.transaction</groupId>
<artifactId>jboss-transaction-api_1.2_spec</artifactId>
<version>1.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.marshalling</groupId>
<artifactId>jboss-marshalling</artifactId>
<version>1.4.11.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.weld</groupId>
<artifactId>weld-core</artifactId>
<version>2.3.4.Final</version>
</dependency>
<dependency>
<groupId>org.wildfly.security</groupId>
<artifactId>wildfly-security-manager</artifactId>
<version>1.1.2.Final</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>19.0</version>
</dependency>
<dependency>
<groupId>org.jboss.weld.se</groupId>
<artifactId>weld-se</artifactId>
<version>2.3.4.Final</version>
</dependency>
<!-- contains all classes of JBeret batch runtime. This library is
required to run batch applications in both Java SE and Java EE
environment. -->
<dependency>
<groupId>org.jberet</groupId>
<artifactId>jberet-core</artifactId>
<version>${jberet.version}</version>
</dependency>
<!-- contains implementation classes of JBeret batch runtime
specifically for Java SE environment. -->
<dependency>
<groupId>org.jberet</groupId>
<artifactId>jberet-se</artifactId>
<version>${jberet.version}</version>
</dependency>
<!-- a zip file containing the following content, and provides a
good start to write and run batch applications with JBeret in
Java SE.
* All libraries required to run batch applications in
Java SE environment
* default configuration file, jberet.properties for
configuring JBeret batch runtime in Java SE environment
* jberet-support library and its common transitive
dependencies
-->
<dependency>
<groupId>org.jberet</groupId>
<artifactId>jberet-distribution</artifactId>
<version>${jberet.version}</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.191</version>
</dependency>
</dependencies>
</project>
最佳答案
经过几个小时的比较，我终于找到了不同之处!! beans.xml 中的 bean 发现模式被注释 并且应该是all :
<?xml version="1.0"?>
<!-- <beans bean-discovery-mode="annotated" version="1.1" -->
<beans bean-discovery-mode="all" version="1.1"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"/>
根据 Javadoc - Enum BeanDiscoveryMode :
ALL:将考虑存档中的所有类型。ANNOTATED:只有那些带有 bean 定义注释的类型才会被考虑。NONE:此存档将被忽略。关于java - JSR352:注释@Named 在 Java SE 中不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38038184/
26
4
0
我有一堆字符串，其中包含以姓氏，名字格式命名的名称列表，并用逗号分隔，如下所示: names 序列化字符串中的“first name last name”，我们在Stack Overflow上找到一个
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关闭。这个问题需要details or clarity .它目前不接受答案。 想改进这个问题吗？ 通过 editing this post 添加细节并澄清问题. 关闭 8 年前。 Improve t
我创建了一个 Web 应用程序，它具有使用 JSF 技术的 createBook.xhtml 并且它使用托管 Bean。在此页面中，用户必须在输入字段中填写所需信息，然后点击提交按钮。然后应使用 do
嘿，我正在尝试弄清楚如何将在 mySQL 中工作的语句转换为 PostgreSQL 并且很好奇是否有人知道解决方案。 这是在 mySQL 中有效的语句: def self.by_name(keywor
如果我要创建所有类型的类型，而不是使用字符串和原始类型，那么最大的缺点是什么？ 通常它看起来像: String name = person.getName(); int age = person.ge
我正在尝试从以下内容中提取郊区名称: 12 street name, suburb name, CTG 1234 在 PHP 中使用正则表达式。 街道和郊区名称都可以是任意数量的单词长度。 CTG 是
我有一个呈现个人详细信息组件的父组件，并且正在注入(inject)父组件的验证器范围。如果我使用 v-validate 指令和 this.$validator.validateAll() 或 this
现在，据我了解，name[] 声明中的 extern 告诉编译器它的定义在其他地方(在我的程序中，我定义了它低于我使用它的部分)。但是为什么 strlen() 和 sizeof 会有不同的结果？str
我一直在解决一个问题: "Design a program that asks the user for a series of names (in no particular order). Aft
我的 XML 如下所示: 我想使用 JAXB 来阅读该内容。 我知道我能做到 @XmlRootElement(name="thing") public class Thing{
对于字符串 name[]，我们可以使用 strlen(name)+1 和 sizeof(name) 互换 在我们的代码中没有经过深思熟虑？他们不一样吗？我检查了一下，发现两者的返回类型都是相同的，si
我正在尝试从以下内容中提取郊区名称: 12 street name, suburb name, CTG 1234 在 PHP 中使用正则表达式。 街道和郊区名称的长度可以是任意数量。 CTG 是 st
关闭。这个问题需要details or clarity .它目前不接受答案。 想改进这个问题吗？ 通过 editing this post 添加细节并澄清问题. 关闭 8 年前。 Improve t
bash 手册列出了 for 的语法。复合语句为for name [ [ in [ word ... ] ] ; ] do list ; done这意味着 do 之前的分号如果 in 是可选的子句省略
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