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Google Guice依赖jar包的详细介绍

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Google Guice是一个轻量级的依赖注入框架,由Google公司开发并维护。它允许开发者通过Java注解或者API的方式将各个组件连接起来,从而简化了传统Java开发中复杂的依赖关系管理。在使用Guice之前,开发者需要确保项目的类路径(classpath)中包含了所有Guice运行所需的jar包。 ### Guice的依赖注入机制 依赖注入(Dependency Injection,简称DI)是一种设计模式,它允许创建对象的代码与使用这些对象的代码分离。通过注入依赖,可以使得代码更加灵活、可测试和可复用。在Guice中,依赖注入通常是通过绑定(bindings)来实现的,绑定定义了接口和实现之间的关系。 Guice通过一系列注解(如`@Inject`)来标识依赖的注入点,以及通过模块(Modules)来配置绑定。模块是实现了`Module`接口的Java类,它们通过`bind()`方法来告诉Guice如何创建对象并提供给需要它们的地方。 ### Guice核心jar包 根据标题和描述中提供的信息,下面是Guice运行所必需的两个核心jar文件: 1. **Guice-3.0.jar**:这是Google Guice的主jar包,包含了Guice框架的核心实现代码,以及上述提到的`@Inject`注解和其他用于依赖注入的接口和类。 2. **javax.inject.jar**:虽然从Java 6开始,`@Inject`注解成为了Java标准的一部分,但`javax.inject`包提供了与Java SE兼容的`@Inject`注解以及`Provider`接口和`Scope`注解等,它并非Java SE的一部分。在某些情况下,为了兼容性,开发者需要在项目中包含这个jar包。 ### Guice的使用 要开始使用Guice,首先需要在项目中添加上述两个jar包。然后,你需要创建一个或多个Guice模块,这些模块配置了如何实例化和注入对象。当你的应用程序启动时,Guice将根据这些模块的配置来提供对象。 创建模块的一个简单例子如下: ```java import com.google.inject.Guice; import com.google.inject.Injector; import com.google.inject.servlet.GuiceServletContextListener; import javax.servlet.annotation.WebListener; @WebListener public class GuiceServletConfig extends GuiceServletContextListener { @Override protected Injector getInjector() { return Guice.createInjector(new MyModule()); } } class MyModule extends AbstractModule { @Override protected void configure() { bind(MyService.class).to(MyServiceImpl.class); } } ``` 在这个例子中,`MyModule`告诉Guice,当需要`MyService`接口的实例时,应该提供`MyServiceImpl`类的实例。 ### Guice的优势与特点 - **轻量级**:Guice的jar包相对较小,且对程序的侵入性较低,易于集成到现有项目中。 - **灵活性**:Guice提供多种绑定方式,如按类型绑定、按名称绑定、按实例绑定等。 - **高效的依赖注入**:Guice采用延迟加载机制,只有在真正需要对象时,才会去创建对象,提高了效率。 - **强大的作用域控制**:通过`@Singleton`注解和自定义作用域,Guice支持单例模式和会话作用域等多种作用域。 - **与Servlet和JSP集成**:Guice与Servlet API集成紧密,易于用于Web应用程序中。 - **与Google其他产品集成**:如与App Engine和TestNG集成。 - **支持多种注解**:虽然Guice有自己的注解,但它也支持CDI(Contexts and Dependency Injection)注解。 ### Guice的标签和相关资源 【标签】中提到的“Guice”和“Google”直接反映了这项技术的归属以及它们在搜索引擎巨头Google公司中的位置。因此,当我们讨论Guice时,我们通常还会关联到其他Google的技术和框架,例如Google App Engine、Google Web Toolkit等。 ### 结论 在开发中使用Guice能够有效地管理对象的依赖关系,简化代码的复杂性,提高代码的可维护性和可测试性。而了解并掌握Google Guice所必需的jar文件是使用这项技术的第一步。通过在项目中正确地包含和使用Guice-3.0.jar和javax.inject.jar,开发者可以利用Guice来构建高度模块化和易于维护的应用程序。

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repository\org\apache\hadoop\hadoop-distcp\2.8.5\hadoop-distcp-2.8.5.jar;D:\maven\local repository\org\apache\hbase\hbase-replication\2.2.4\hbase-replication-2.2.4.jar;D:\maven\local repository\org\apache\hadoop\hadoop-hdfs\2.8.5\hadoop-hdfs-2.8.5.jar;D:\maven\local repository\commons-daemon\commons-daemon\1.0.13\commons-daemon-1.0.13.jar;D:\maven\local repository\io\netty\netty-all\4.0.23.Final\netty-all-4.0.23.Final.jar;D:\maven\local repository\org\fusesource\leveldbjni\leveldbjni-all\1.8\leveldbjni-all-1.8.jar;D:\maven\local repository\org\apache\hadoop\hadoop-yarn-client\2.8.1\hadoop-yarn-client-2.8.1.jar" org.example.HBaseMapreduce.BrandAmount 2025-06-06 23:34:00,430 INFO Configuration.deprecation: io.bytes.per.checksum is deprecated. Instead, use dfs.bytes-per-checksum 2025-06-06 23:34:00,570 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032 2025-06-06 23:34:00,809 INFO Configuration.deprecation: io.bytes.per.checksum is deprecated. Instead, use dfs.bytes-per-checksum 2025-06-06 23:34:01,793 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:host.name=LAPTOP-DET3CHHR 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:java.version=1.8.0_144 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Oracle Corporation 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:java.home=C:\Program Files\Java\jdk1.8.0_144\jre 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:java.class.path=C:\Program Files\Java\jdk1.8.0_144\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\dnsns.jar;C:\Program 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repository\org\glassfish\jersey\containers\jersey-container-servlet-core\2.25.1\jersey-container-servlet-core-2.25.1.jar;D:\maven\local repository\javax\ws\rs\javax.ws.rs-api\2.0.1\javax.ws.rs-api-2.0.1.jar;D:\maven\local repository\org\apache\hbase\hbase-procedure\2.2.4\hbase-procedure-2.2.4.jar;D:\maven\local repository\org\eclipse\jetty\jetty-server\9.3.27.v20190418\jetty-server-9.3.27.v20190418.jar;D:\maven\local repository\org\eclipse\jetty\jetty-io\9.3.27.v20190418\jetty-io-9.3.27.v20190418.jar;D:\maven\local repository\org\eclipse\jetty\jetty-servlet\9.3.27.v20190418\jetty-servlet-9.3.27.v20190418.jar;D:\maven\local repository\org\eclipse\jetty\jetty-webapp\9.3.27.v20190418\jetty-webapp-9.3.27.v20190418.jar;D:\maven\local repository\org\eclipse\jetty\jetty-xml\9.3.27.v20190418\jetty-xml-9.3.27.v20190418.jar;D:\maven\local repository\org\glassfish\web\javax.servlet.jsp\2.3.2\javax.servlet.jsp-2.3.2.jar;D:\maven\local repository\org\glassfish\javax.el\3.0.1-b12\javax.el-3.0.1-b12.jar;D:\maven\local repository\javax\servlet\jsp\javax.servlet.jsp-api\2.3.1\javax.servlet.jsp-api-2.3.1.jar;D:\maven\local repository\org\jamon\jamon-runtime\2.4.1\jamon-runtime-2.4.1.jar;D:\maven\local repository\javax\servlet\javax.servlet-api\3.1.0\javax.servlet-api-3.1.0.jar;D:\maven\local repository\com\lmax\disruptor\3.3.6\disruptor-3.3.6.jar;D:\maven\local repository\org\apache\hadoop\hadoop-distcp\2.8.5\hadoop-distcp-2.8.5.jar;D:\maven\local repository\org\apache\hbase\hbase-replication\2.2.4\hbase-replication-2.2.4.jar;D:\maven\local repository\org\apache\hadoop\hadoop-hdfs\2.8.5\hadoop-hdfs-2.8.5.jar;D:\maven\local repository\commons-daemon\commons-daemon\1.0.13\commons-daemon-1.0.13.jar;D:\maven\local repository\io\netty\netty-all\4.0.23.Final\netty-all-4.0.23.Final.jar;D:\maven\local repository\org\fusesource\leveldbjni\leveldbjni-all\1.8\leveldbjni-all-1.8.jar;D:\maven\local repository\org\apache\hadoop\hadoop-yarn-client\2.8.1\hadoop-yarn-client-2.8.1.jar;D:\Idea 2024\IntelliJ IDEA 2024.3.1.1\lib\idea_rt.jar 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:java.library.path=C:\Program Files\Java\jdk1.8.0_144\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files\Common Files\Oracle\Java\javapath;D:\soft\bin\;C:\ProgramData\Oracle\Java\javapath;C:\Program Files\Java\jdk1.8.0_144\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;D:\mingw64\bin;D:\anconda\Library\bin;D:\anconda;D:\anconda\Scripts;C:\Program Files\Microsoft VS Code\bin;".;C:\Program Files\Java\jdk1.8.0_144\lib;C:\Program Files\Java\jdk1.8.0_144\lib\tools.jar";D:\node\;D:\node;D:\node\node_cache;D:\node\node_global;C:\ProgramData\chocolatey\bin;D:\Git\Git\cmd;C:\C:\apache-tomcat-10.1.28\bin;C:\C:\apache-tomcat-10.1.28\lib\jsp-api.jar;C:\C:\apache-tomcat-10.1.28\lib\servlet-api.jar;%JAVA-HOME%jre\bin;D:\maven\apache-maven-3.8.5\bin;C:\python\python 3.12.2\Scripts\;C:\python\python 3.12.2\;C:\Program Files\MySQL\MySQL Shell 8.0\bin\;D:\python\Scripts\;D:\python\;C:\Users\缃楁闆╘AppData\Local\Microsoft\WindowsApps;D:\Microsoft VS Code\bin;C:\Program Files\Java\jdk1.8.0_144\bin;D:\Idea 2024\IntelliJ IDEA 2024.3.1.1\bin;;C:\Users\缃楁闆╘AppData\Roaming\npm;D:\Hadoop\hadoop\hadoop-3.3.0\bin;D:\Hadoop\hadoop\hadoop-3.3.0\sbin;D:\Hadoop\hbase-2.6.2\bin;;. 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=C:\Users\236A~1\AppData\Local\Temp\ 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:java.compiler=<NA> 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:os.name=Windows 10 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:os.arch=amd64 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:os.version=10.0 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:user.name=罗欣雨 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:user.home=C:\Users\罗欣雨 2025-06-06 23:34:01,794 INFO zookeeper.ZooKeeper: Client environment:user.dir=D:\code\Hbase_hadoop\HomeWork1 2025-06-06 23:34:01,796 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=luo:2181 sessionTimeout=90000 watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$14/762080652@4f33c470 2025-06-06 23:34:01,825 INFO zookeeper.ClientCnxn: Opening socket connection to server luo/192.168.10.129:2181. Will not attempt to authenticate using SASL (unknown error) 2025-06-06 23:34:01,828 INFO zookeeper.ClientCnxn: Socket connection established to luo/192.168.10.129:2181, initiating session 2025-06-06 23:34:01,839 INFO zookeeper.ClientCnxn: Session establishment complete on server luo/192.168.10.129:2181, sessionid = 0x1974500ed1b0030, negotiated timeout = 90000 Exception in thread "main" java.io.IOException: The ownership on the staging directory /tmp/hadoop-yarn/staging/罗欣雨/.staging is not as expected. It is owned by ???. The directory must be owned by the submitter 罗欣雨 or by 罗欣雨 at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:120) at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:146) at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1341) at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1338) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1844) at org.apache.hadoop.mapreduce.Job.submit(Job.java:1338) at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1359) at org.example.HBaseMapreduce.BrandAmount.main(BrandAmount.java:67) Process finished with exit code 1

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