Linux vs Windows:JDK 1.8.0_45安装体验深度对比

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![Linux vs Windows:JDK 1.8.0_45安装体验深度对比](https://www.shaileshjha.com/wp-content/uploads/2019/03/java_8_jdk_download_page.jpg) # 摘要 本文旨在为开发人员提供在Linux和Windows操作系统上安装和配置JDK 1.8.0_45的详细指南。从系统选择、安装前准备、具体安装过程,到环境变量的设置与优化,本文覆盖了JDK安装的各个方面。同时,文章还比较了在不同操作系统上安装JDK的体验,分析了性能和跨平台特性的差异,并探讨了系统兼容性及维护性的问题。高级特性章节展示了Java新特性的实践应用,JVM性能优化技巧,以及Java安全性案例分析。最后,本文总结了JDK安装的优缺点,并对Java未来发展趋势提供了展望,旨在为开发人员提供实用的平台选择和开发建议。 # 关键字 JDK安装;Linux;Windows;环境变量;性能优化;Java安全 参考资源链接:[Linux JDK 1.8.0_45 安装教程与环境配置](https://wenku.csdn.net/doc/1pestc2ijq?spm=1055.2635.3001.10343) # 1. JDK 1.8.0_45安装概览 在我们深入了解如何在Linux和Windows操作系统上安装和配置Java Development Kit(JDK)版本1.8.0_45之前,让我们先概述安装过程和所需的基本步骤。JDK是Java编程语言的核心组件,是开发和运行Java应用程序不可或缺的工具。对于Java开发者来说,正确安装JDK是开展工作的第一步,这影响到后续开发的效率和应用的性能。 本章将简要介绍JDK 1.8.0_45的安装流程,提供一个概览,确保读者对即将进行的操作有基本的理解。接下来的章节将详细介绍在Linux和Windows操作系统中具体的安装步骤,包括系统准备工作、安装过程详解、环境变量配置及优化等。 虽然JDK 1.8.0_45是一个较早的版本,它仍被广泛使用在许多生产环境中,尤其是在保守或稳定的项目里。学习如何安装和配置旧版本的JDK对于理解Java历史和维护遗留系统非常重要。同时,通过学习不同操作系统的安装流程,可以加深对各自系统特点的理解,并为处理不同环境下的Java应用提供灵活性。 # 2. Linux环境下JDK安装与配置 ## 2.1 Linux系统基础和JDK安装前的准备 ### 2.1.1 Linux发行版的选择和理由 在选择Linux发行版时,许多因素需要考虑,例如安全性、稳定性、社区支持、软件包管理工具和易用性等。对于开发者而言,易用性和软件包管理工具是重要的考量因素。例如,Ubuntu系统,它因其直观的用户界面和强大的包管理器APT而受到许多开发者的青睐。另一方面,Red Hat Enterprise Linux(RHEL)和它的社区版本CentOS,是企业级环境中的常见选择,因为它们在系统稳定性、安全性和企业支持方面具有优势。 ### 2.1.2 安装JDK之前的操作系统环境配置 在安装JDK之前,确保系统环境是稳定和优化的至关重要。首先,你需要更新系统软件包到最新版本以确保系统安全和兼容性。你可以使用发行版自带的包管理器来更新系统,例如在基于Debian的系统中使用以下命令: ```bash sudo apt-get update sudo apt-get upgrade ``` 接着,优化系统配置。根据应用程序的需求,你可能需要调整内核参数或者设置系统资源限制。例如,使用`ulimit`命令来设置用户级别的文件描述符限制。此外,确认系统时区设置正确,并配置好NTP(Network Time Protocol)服务以保证系统时间准确。 ## 2.2 Linux下JDK的安装过程详解 ### 2.2.1 使用包管理器安装JDK 多数Linux发行版都提供了自己的包管理系统来安装JDK,这使得安装过程变得简单快捷。以基于Debian的系统(如Ubuntu)为例,你可以使用`apt-get`命令来安装OpenJDK: ```bash sudo apt-get update sudo apt-get install openjdk-8-jdk ``` 如果你需要安装Oracle JDK,由于Oracle并不提供官方的APT仓库,你可以添加第三方仓库如WebUpd8: ```bash sudo add-apt-repository ppa:webupd8team/java sudo apt-get update sudo apt-get install oracle-java8-installer ``` ### 2.2.2 手动安装JDK的方法 在某些情况下,你可能需要手动下载和安装JDK,比如想要安装最新的JDK预览版,或者是你的Linux发行版不提供官方支持的包。首先从Oracle官网下载JDK压缩包,然后解压并配置环境变量。以下是手动安装的步骤: 1. 访问Oracle官网或其JDK下载页面。 2. 下载所需版本的Linux x64压缩包。 3. 使用`tar`命令解压缩文件: ```bash tar -zxvf jdk-8uXXX-linux-x64.tar.gz ``` 4. 将解压后的文件夹移动到合适的位置,通常是`/usr/lib/jvm`目录。 ```bash sudo mv jdk1.8.0_XXX /usr/lib/jvm/ ``` 5. 设置环境变量,详情请看2.3节。 ### 2.2.3 验证JDK安装的正确性 安装完成后,确保JDK正确安装并且环境变量设置无误,通过以下步骤进行验证: 1. 打开终端并输入以下命令以查看Java版本: ```bash java -version ``` 2. 检查`JAVA_HOME`环境变量是否指向了JDK的安装路径。 ```bash echo $JAVA_HOME ``` 如果以上命令没有返回正确的JDK路径,可能需要手动设置`JAVA_HOME`环境变量。 ## 2.3 Linux下JDK环境变量的配置与优化 ### 2.3.1 设置JAVA_HOME和PATH环境变量 配置环境变量是确保JDK能够被正确识别和使用的必要步骤。以下是在bash shell中设置`JAVA_HOME`和更新`PATH`变量的步骤: 1. 编辑`~/.bashrc`文件(或在其他shell中相应的配置文件): ```bash gedit ~/.bashrc ``` 2. 在文件末尾添加以下内容: ```bash export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_XXX export PATH=$JAVA_HOME/bin:$PATH ``` 3. 保存并关闭文件。 4. 使改动生效: ```bash source ~/.bashrc ``` ### 2.3.2 环境变量配置后的问题排查与修复 在环境变量配置后,可能会出现一些问题,如`java`命令无法识别,或者`javac`编译器不工作等。排查这些问题需要检查配置文件中的路径是否正确以及是否正确执行了`source`命令。此外,确保没有其他路径变量覆盖了你的设置,可以通过以下命令查看环境变量的设置顺序: ```bash echo $PATH ``` 如果发现路径有冲突,考虑使用`PATH_MAX`来明确指定优先级。通常,任何需要覆盖系统默认设置的自定义配置都应放在`PATH`变量的前面。 在Linux环境下,JDK的安装和配置是一项重要的工作,涉及到软件包的选择、操作系统环境的准备、JDK的安装、环境变量的配置等多个环节。虽然在本章节中我们详细介绍了这些过程,但在实践中仍然会遇到各种问题,需要不断地实践和调整来保证开发环境的稳定性和可靠性。 在下一章中,我们将探讨Windows环境下的JDK安装和配置,与Linux环境相比,Windows环境下有
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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\media\jersey-media-jaxb\2.25.1\jersey-media-jaxb-2.25.1.jar;D:\maven\local repository\javax\annotation\javax.annotation-api\1.2\javax.annotation-api-1.2.jar;D:\maven\local repository\org\glassfish\hk2\hk2-api\2.5.0-b32\hk2-api-2.5.0-b32.jar;D:\maven\local repository\org\glassfish\hk2\hk2-utils\2.5.0-b32\hk2-utils-2.5.0-b32.jar;D:\maven\local repository\org\glassfish\hk2\external\aopalliance-repackaged\2.5.0-b32\aopalliance-repackaged-2.5.0-b32.jar;D:\maven\local repository\org\glassfish\hk2\external\javax.inject\2.5.0-b32\javax.inject-2.5.0-b32.jar;D:\maven\local repository\org\glassfish\hk2\hk2-locator\2.5.0-b32\hk2-locator-2.5.0-b32.jar;D:\maven\local repository\org\javassist\javassist\3.20.0-GA\javassist-3.20.0-GA.jar;D:\maven\local repository\javax\validation\validation-api\1.1.0.Final\validation-api-1.1.0.Final.jar;D:\maven\local 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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本专栏全面涵盖了 Linux 系统中 JDK 1.8.0_45 的安装、升级、配置、调优、安全加固、诊断和部署等各个方面。它深入探讨了安装过程中的常见问题及其解决方案,提供了从 JDK 1.8.0_40 无缝迁移的实战技巧,并对比分析了 Linux 下 JDK 1.8.0_45 的安装和自动化部署方法。此外,本专栏还深入研究了 JDK 1.8.0_45 的内存调优、环境变量配置、版本控制、升级和维护策略,以及在 Linux 系统中使用 JDK 1.8.0_45 的最佳实践。通过阅读本专栏,读者可以全面了解 JDK 1.8.0_45 在 Linux 系统中的安装、使用和管理,并掌握在不同场景下优化其性能和安全的技巧。

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