【背景】
折腾：
中，需要先去安装Java。
【折腾过程】
1.参考：
Install OpenFire 3.8.1 on CentOS 6.4 x86_64 – The Official Blog of Richard Ricketts
去操作：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 | [root@bogon ~]# yum search javaLoaded plugins: fastestmirrorLoading mirror speeds from cached hostfile * atomic: mirrors.hosting.in.th * base: mirrors.163.com * extras: mirrors.btte.net * updates: mirrors.163.com======================================================== N/S Matched: java =========================================================adaptx-javadoc.x86_64 : Javadoc for adaptxant-contrib-javadoc.noarch : Javadoc for ant-contribant-javadoc.x86_64 : Javadoc for antant-javamail.x86_64 : Optional javamail tasks for antantlr-javadoc.x86_64 : Javadoc for antlrapache-jasper-javadoc.noarch : Javadoc for Jasperavalon-framework-javadoc.x86_64 : Javadoc for avalon-frameworkavalon-logkit-javadoc.noarch : Javadoc for avalon-logkitaxis-javadoc.noarch : Javadoc for axisbatik-javadoc.noarch : Javadoc for batikbcel-javadoc.x86_64 : Javadoc for bcelbea-stax-javadoc.x86_64 : Javadoc for bea-staxbrlapi-java.x86_64 : Java binding for BrlAPIbsf-javadoc.noarch : Javadoc for bsfbsh-javadoc.noarch : Javadoc for bshcastor-javadoc.x86_64 : Javadoc for castorclasspathx-jaf-javadoc.x86_64 : Javadoc for classpathx-jafclasspathx-mail-javadoc.noarch : Javadoc for classpathx-maildb4-java.x86_64 : Development files for using the Berkeley DB (version 4) with Javaeclipse-mylyn-java.x86_64 : Mylyn Bridge: Java Developmentflute-javadoc.noarch : Javadoc for flutefop-javadoc.x86_64 : Javadoc for fopgcc-java.x86_64 : Java support for GCCgraphviz-java.x86_64 : Java extension for graphvizhamcrest-javadoc.noarch : Javadoc for hamcresthsqldb-javadoc.noarch : Javadoc for hsqldbicu4j-javadoc.x86_64 : Javadoc for icu4jjakarta-commons-beanutils-javadoc.x86_64 : Javadoc for jakarta-commons-beanutilsjakarta-commons-codec-javadoc.x86_64 : Javadoc for jakarta-commons-codecjakarta-commons-collections-javadoc.noarch : Javadoc for jakarta-commons-collectionsjakarta-commons-collections-testframework-javadoc.noarch : Javadoc for jakarta-commons-collections-testframeworkjakarta-commons-daemon-javadoc.x86_64 : Javadoc for jakarta-commons-daemonjakarta-commons-dbcp-javadoc.noarch : Javadoc for jakarta-commons-dbcpjakarta-commons-digester-javadoc.noarch : Javadoc for jakarta-commons-digesterjakarta-commons-discovery-javadoc.noarch : Javadoc for jakarta-commons-discoveryjakarta-commons-el-javadoc.noarch : Javadoc for jakarta-commons-eljakarta-commons-httpclient-javadoc.x86_64 : Javadoc for jakarta-commons-httpclientjakarta-commons-io-javadoc.noarch : Javadoc for jakarta-commons-iojakarta-commons-lang-javadoc.noarch : Javadoc for jakarta-commons-langjakarta-commons-logging-javadoc.noarch : Javadoc for jakarta-commons-loggingjakarta-commons-net-javadoc.noarch : Javadoc for jakarta-commons-netjakarta-commons-pool-javadoc.x86_64 : Javadoc for jakarta-commons-pooljakarta-oro-javadoc.x86_64 : Javadoc for jakarta-orojakarta-taglibs-standard-javadoc.noarch : Javadoc for jakarta-taglibs-standardjava_cup.x86_64 : Java source interpreterjava_cup-javadoc.x86_64 : Javadoc for java_cupjava_cup-manual.x86_64 : Documentation for java_cupjavacc.x86_64 : A parser/scanner generator for javajavacc-demo.x86_64 : Examples for javaccjavacc-manual.x86_64 : Manual for javaccjavassist.noarch : The Java Programming Assistant provides simple Java bytecode manipulationjavassist-javadoc.noarch : Javadocs for javassistjcommon-serializer-javadoc.noarch : Javadoc for jcommon-serializerjdepend-javadoc.noarch : Javadoc for jdependjdom-javadoc.noarch : Javadoc for jdomjflex-javadoc.noarch : Javadoc for jflexjlex-javadoc.x86_64 : Javadoc for jlexjna-javadoc.x86_64 : Javadocs for jnajsch-javadoc.noarch : Javadoc for jschjss-javadoc.x86_64 : Java Security Services (JSS) Javadocsjtidy-javadoc.noarch : Javadoc for jtidyjunit-javadoc.x86_64 : Javadoc for junitjunit4-javadoc.noarch : Javadoc for junit4jython-javadoc.x86_64 : Javadoc for jythonjzlib-javadoc.x86_64 : Javadoc for jzlibldapjdk-javadoc.x86_64 : Javadoc for ldapjdklibbase-javadoc.noarch : Javadoc for libbaselibfonts-javadoc.noarch : Javadoc for libfontslibformula-javadoc.noarch : Javadoc for libformulalibguestfs-java.x86_64 : Java bindings for libguestfslibguestfs-java-devel.x86_64 : Java development package for libguestfslibguestfs-javadoc.x86_64 : Java documentation for libguestfsliblayout-javadoc.noarch : Javadoc for liblayoutlibloader-javadoc.noarch : Javadoc for libloaderlibreadline-java.x86_64 : Java wrapper for the EditLine librarylibreadline-java-javadoc.x86_64 : Javadoc for libreadline-javalibreoffice-javafilter.x86_64 : Optional javafilter module for LibreOfficelibrepository-javadoc.noarch : Javadoc for librepositorylibvirt-java.noarch : Java bindings for the libvirt virtualization APIlibvirt-java-devel.noarch : Compressed Java source files for libvirt-javalibvirt-java-javadoc.noarch : Java documentation for libvirt-javalog4j-javadoc.x86_64 : Javadoc for log4jlpg-java.noarch : Java runtime library for LPGlpg-java-compat.noarch : Compatibility Java runtime library for LPG 1.xlucene-javadoc.noarch : Javadoc for Lucenemx4j-javadoc.noarch : Javadoc for mx4jobjectweb-anttask-javadoc.noarch : Javadoc for objectweb-anttaskobjectweb-asm-javadoc.noarch : Javadoc for objectweb-asmpentaho-libxml-javadoc.noarch : Javadoc for pentaho-libxmlpentaho-reporting-flow-engine-javadoc.noarch : Javadoc for pentaho-reporting-flow-enginepki-common-javadoc.noarch : Certificate System - PKI Common Framework Javadocspki-java-tools.noarch : Certificate System - PKI Java-Based Toolspki-java-tools-javadoc.noarch : Certificate System - PKI Java-Based Tools Javadocspki-util-javadoc.noarch : Certificate System - PKI Utility Framework Javadocsppl-java.x86_64 : The Java interface of the Parma Polyhedra Libraryppl-java-javadoc.x86_64 : Javadocs for ppl-javaqdox-javadoc.noarch : Javadoc for qdoxregexp-javadoc.x86_64 : Javadoc for regexprhino-javadoc.noarch : Javadoc for rhinorome-javadoc.noarch : Javadocs for romesac-javadoc.noarch : Javadoc for sacsaxon-javadoc.noarch : Javadoc for saxonsblim-cim-client-javadoc.noarch : Javadoc for sblim-cim-clientsblim-cim-client2-javadoc.noarch : Javadoc for sblim-cim-client2setools-libs-java.i686 : Java bindings for SELinux policy analysissetools-libs-java.x86_64 : Java bindings for SELinux policy analysisslf4j-javadoc.noarch : Javadoc for slf4jsvnkit-javadoc.x86_64 : Javadoc for SVNKittagsoup-javadoc.noarch : Javadoc for tagsouptomcat6-javadoc.x86_64 : Javadoc generated documentation for Apache Tomcattrilead-ssh2-javadoc.noarch : Javadoc for trilead-ssh2tzdata-java.noarch : Timezone data for Javavelocity-javadoc.noarch : Javadoc for velocitywerken-xpath-javadoc.noarch : Javadoc for werken-xpathws-commons-util-javadoc.noarch : Javadoc for ws-commons-utilws-jaxme-javadoc.noarch : Javadoc for ws-jaxmewsdl4j-javadoc.noarch : Javadoc for wsdl4jxalan-j2-javadoc.noarch : Javadoc for xalan-j2xdoclet-javadoc.noarch : XDoclet Javadocxerces-j2-javadoc-apis.x86_64 : Javadoc for xerces-j2 apisxerces-j2-javadoc-impl.x86_64 : Javadoc for xerces-j2 implementationxerces-j2-javadoc-other.x86_64 : Javadoc for other xerces-j2 componentsxerces-j2-javadoc-xni.x86_64 : Javadoc for xerces-j2 xnixjavadoc.noarch : The XJavaDoc enginexjavadoc-javadoc.noarch : Javadoc for xjavadocxml-commons-apis-javadoc.x86_64 : Javadoc for xml-commons-apisxml-commons-resolver-javadoc.x86_64 : Javadoc for xml-commons-resolverxmldb-api-javadoc.noarch : Javadoc for xmldb-apixmlgraphics-commons-javadoc.noarch : Javadoc for xmlgraphics-commonsxmlrpc3-javadoc.noarch : Javadoc for xmlrpc3zabbix-java-gateway.x86_64 : Zabbix java gatewayant.x86_64 : Ant build tool for javaavalon-framework.x86_64 : Java components interfacesavalon-logkit.noarch : Java logging toolkitaxis.noarch : A SOAP implementation in Javabatik.x86_64 : Scalable Vector Graphics for Javabsh.noarch : Lightweight Scripting for Javabyaccj.x86_64 : Parser Generator with Java Extensioncastor.x86_64 : An open source data binding framework for Javaclasspathx-jaf.x86_64 : GNU JavaBeans(tm) Activation Frameworkclasspathx-mail.noarch : GNU JavaMail(tm)ecj.x86_64 : Eclipse Compiler for Javaeclipse-jdt.x86_64 : Eclipse Java Development Toolsflute.x86_64 : Java CSS parser using SACgcc.x86_64 : Various compilers (C, C++, Objective-C, Java, ...)gdb.x86_64 : A GNU source-level debugger for C, C++, Java and other languagesicedtea-web.x86_64 : Additional Java components for OpenJDK - Java browser plug-in and Web Start implementationicedtea-web-javadoc.noarch : API documentation for IcedTea-Webicu4j.x86_64 : International Components for Unicode for Javajakarta-commons-collections.noarch : Provides new interfaces, implementations and utilities for Java Collectionsjakarta-commons-daemon-jsvc.x86_64 : Java daemon launcherjakarta-commons-lang.noarch : Provides a host of helper utilities for the java.lang APIjakarta-commons-net.noarch : Internet protocol suite Java libraryjava-1.5.0-gcj.x86_64 : JPackage runtime compatibility layer for GCJjava-1.5.0-gcj-devel.x86_64 : JPackage development compatibility layer for GCJjava-1.5.0-gcj-javadoc.x86_64 : API documentation for libgcjjava-1.5.0-gcj-src.x86_64 : Source files for libgcjjava-1.6.0-openjdk.x86_64 : OpenJDK Runtime Environmentjava-1.6.0-openjdk-demo.x86_64 : OpenJDK Demosjava-1.6.0-openjdk-devel.x86_64 : OpenJDK Development Environmentjava-1.6.0-openjdk-javadoc.x86_64 : OpenJDK API Documentationjava-1.6.0-openjdk-src.x86_64 : OpenJDK Source Bundlejava-1.7.0-openjdk.x86_64 : OpenJDK Runtime Environmentjava-1.7.0-openjdk-demo.x86_64 : OpenJDK Demosjava-1.7.0-openjdk-devel.x86_64 : OpenJDK Development Environmentjava-1.7.0-openjdk-javadoc.noarch : OpenJDK API Documentationjava-1.7.0-openjdk-src.x86_64 : OpenJDK Source Bundlejava-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environmentjava-1.8.0-openjdk-demo.x86_64 : OpenJDK Demosjava-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environmentjava-1.8.0-openjdk-headless.x86_64 : OpenJDK Runtime Environmentjava-1.8.0-openjdk-javadoc.noarch : OpenJDK API Documentationjava-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundlejcommon-serializer.x86_64 : JFree Java General Serialization Frameworkjdepend.noarch : Java Design Quality Metricsjdom.noarch : Java alternative to DOM and SAXjlex.x86_64 : A Lexical Analyzer Generator for Javajline.noarch : Java library for reading and editing user input in console applicationsjna.x86_64 : Pure Java access to native librariesjsch.noarch : Pure Java implementation of SSH2jss.x86_64 : Java Security Services (JSS)junit.x86_64 : Java regression test packagejunit4.noarch : Java regression test packagejython.x86_64 : A Java implementation of the Python languagejzlib.x86_64 : JZlib re-implementation of zlib in pure Javaldapjdk.x86_64 : The Mozilla LDAP Java SDKlibgcj.i686 : Java runtime library for gcclibgcj.x86_64 : Java runtime library for gcclibgcj-devel.i686 : Libraries for Java development using GCClibgcj-devel.x86_64 : Libraries for Java development using GCClibgcj-src.x86_64 : Java library sources from GCC4 previewlibreoffice-rhino.x86_64 : JavaScript support for LibreOfficelog4j.x86_64 : Java logging packagemx4j.noarch : Open source implementation of JMX Java APImysql-connector-java.noarch : Official JDBC driver for MySQLnuxwdog-client-java.x86_64 : Nuxwdog Watchdog client JNI Packageoprofile-jit.i686 : Libraries required for profiling Java and other JITed codeoprofile-jit.x86_64 : Libraries required for profiling Java and other JITed codeperl-JSON.noarch : Parse and convert to JSON (JavaScript Object Notation)pl-jpl.x86_64 : A bidirectional Prolog/Java interface for SWI Prologrhino.noarch : JavaScript for Javasac.x86_64 : Java standard interface for CSS parsersat4j.noarch : A library of SAT solvers written in Javasaxon.noarch : Java XSLT processorsaxon-aelfred.noarch : Java XML parsersblim-cim-client.noarch : Java CIM Client librarysblim-cim-client2.noarch : Java CIM Client librarysinjdoc.x86_64 : Documentation generator for Java source codeslf4j.noarch : Simple Logging Facade for Javasubversion-javahl.i686 : JNI bindings to the Subversion librariessubversion-javahl.x86_64 : JNI bindings to the Subversion librariessvnkit.x86_64 : Pure Java Subversion client librarytagsoup.noarch : A SAX-compliant HTML parser written in Javatigervnc-server-applet.noarch : Java TigerVNC viewer applet for TigerVNC servertrilead-ssh2.noarch : SSH-2 protocol implementation in pure Javav8.x86_64 : JavaScript Enginevelocity.noarch : Java-based template enginewsdl4j.noarch : Web Services Description Language Toolkit for Javaxalan-j2.noarch : Java XSLT processorxerces-j2.x86_64 : Java XML parserxmldb-api.noarch : XML:DB API for Java Name and summary matches only, use "search all" for everything.[root@bogon ~]# yum install javaLoaded plugins: fastestmirrorSetting up Install ProcessLoading mirror speeds from cached hostfile * atomic: mirrors.hosting.in.th * base: mirrors.163.com * extras: mirrors.btte.net * updates: mirrors.163.comPackage 1:java-1.7.0-openjdk-1.7.0.79-2.5.5.3.el6_6.x86_64 already installed and latest versionNothing to do[root@bogon ~]# |
结果显示已经安装过了java 1.7。
2.然后就是：
要搞清楚，如何确定已经安装了java：
1 2 3 4 5 | [root@bogon ~]# java -versionjava version "1.7.0_79"OpenJDK Runtime Environment (rhel-2.5.5.3.el6_6-x86_64 u79-b14)OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)[root@bogon ~]# |
安装的是OpenJDK。
3.然后再去参考：
CentOS 64位 安装openfire | 在这里-迦楠的后花园
保证Java环境变量已经设置。
搜：
centos 6 install java
参考：
How To Install Java on CentOS and Fedora | DigitalOcean
How to Install JAVA 7 (JDK 7u79) on CentOS/RHEL 7/6/5
算了，直接去安装最新的java 1.8吧：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | [root@bogon ~]# yum install java-1.8.0-openjdk-devel.x86_64Loaded plugins: fastestmirrorSetting up Install ProcessLoading mirror speeds from cached hostfile * atomic: mirrors.hosting.in.th * base: mirrors.163.com * extras: mirrors.btte.net * updates: mirrors.163.comResolving Dependencies--> Running transaction check---> Package java-1.8.0-openjdk-devel.x86_64 1:1.8.0.45-28.b13.el6_6 will be installed--> Processing Dependency: java-1.8.0-openjdk = 1:1.8.0.45-28.b13.el6_6 for package: 1:java-1.8.0-openjdk-devel-1.8.0.45-28.b13.el6_6.x86_64--> Processing Dependency: libawt_xawt.so(SUNWprivate_1.1)(64bit) for package: 1:java-1.8.0-openjdk-devel-1.8.0.45-28.b13.el6_6.x86_64--> Processing Dependency: libawt_xawt.so()(64bit) for package: 1:java-1.8.0-openjdk-devel-1.8.0.45-28.b13.el6_6.x86_64--> Running transaction check---> Package java-1.8.0-openjdk.x86_64 1:1.8.0.45-28.b13.el6_6 will be installed--> Processing Dependency: java-1.8.0-openjdk-headless = 1:1.8.0.45-28.b13.el6_6 for package: 1:java-1.8.0-openjdk-1.8.0.45-28.b13.el6_6.x86_64--> Running transaction check---> Package java-1.8.0-openjdk-headless.x86_64 1:1.8.0.45-28.b13.el6_6 will be installed--> Finished Dependency ResolutionDependencies Resolved==================================================================================================================================== Package Arch Version Repository Size====================================================================================================================================Installing: java-1.8.0-openjdk-devel x86_64 1:1.8.0.45-28.b13.el6_6 updates 10 MInstalling for dependencies: java-1.8.0-openjdk x86_64 1:1.8.0.45-28.b13.el6_6 updates 187 k java-1.8.0-openjdk-headless x86_64 1:1.8.0.45-28.b13.el6_6 updates 32 MTransaction Summary====================================================================================================================================Install 3 Package(s)Total download size: 42 MInstalled size: 142 MIs this ok [y/N]: yDownloading Packages:(1/3): java-1.8.0-openjdk-1.8.0.45-28.b13.el6_6.x86_64.rpm | 187 kB 00:00 (2/3): java-1.8.0-openjdk-devel-1.8.0.45-28.b13.el6_6.x86_64.rpm | 10 MB 00:15 (3/3): java-1.8.0-openjdk-headless-1.8.0.45-28.b13.el6_6.x86_64.rpm | 32 MB 00:55 ------------------------------------------------------------------------------------------------------------------------------------Total 599 kB/s | 42 MB 01:11 Running rpm_check_debugRunning Transaction TestTransaction Test SucceededRunning Transaction Installing : 1:java-1.8.0-openjdk-1.8.0.45-28.b13.el6_6.x86_64 1/3 Installing : 1:java-1.8.0-openjdk-headless-1.8.0.45-28.b13.el6_6.x86_64 2/3 Installing : 1:java-1.8.0-openjdk-devel-1.8.0.45-28.b13.el6_6.x86_64 3/3 Verifying : 1:java-1.8.0-openjdk-devel-1.8.0.45-28.b13.el6_6.x86_64 1/3 Verifying : 1:java-1.8.0-openjdk-1.8.0.45-28.b13.el6_6.x86_64 2/3 Verifying : 1:java-1.8.0-openjdk-headless-1.8.0.45-28.b13.el6_6.x86_64 3/3Installed: java-1.8.0-openjdk-devel.x86_64 1:1.8.0.45-28.b13.el6_6 Dependency Installed: java-1.8.0-openjdk.x86_64 1:1.8.0.45-28.b13.el6_6 java-1.8.0-openjdk-headless.x86_64 1:1.8.0.45-28.b13.el6_6 Complete! |
然后再去确认java的版本，结果还是1.7的：
1 2 3 4 | [root@bogon ~]# java -versionjava version "1.7.0_79"OpenJDK Runtime Environment (rhel-2.5.5.3.el6_6-x86_64 u79-b14)OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode) |
4.终于找到对应的java在哪里了：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | [root@bogon ~]# echo $PATH/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin[root@bogon ~]# ls /usr/lib/jvmjvm/ jvm-commmon/ jvm-exports/ jvm-private/ [root@bogon ~]# ls /usr/lib/jvmjvm/ jvm-commmon/ jvm-exports/ jvm-private/ [root@bogon ~]# ls /usr/lib/jvm/jjava/ jre-1.5.0/java-1.5.0-gcj-1.5.0.0/ jre-1.5.0-gcj/java-1.7.0/ jre-1.7.0/java-1.7.0-openjdk-1.7.0.79.x86_64/ jre-1.7.0-openjdk.x86_64/java-1.7.0-openjdk.x86_64/ jre-1.8.0/java-1.8.0/ jre-1.8.0-openjdk/java-1.8.0-openjdk/ jre-1.8.0-openjdk-1.8.0.45-28.b13.el6_6.x86_64/java-1.8.0-openjdk-1.8.0.45-28.b13.el6_6.x86_64/ jre-gcj/java-openjdk/ jre-openjdk/jre/ [root@bogon ~]# ls /usr/lib/jvm/java-java-1.5.0-gcj-1.5.0.0/ java-1.8.0/java-1.7.0/ java-1.8.0-openjdk/java-1.7.0-openjdk-1.7.0.79.x86_64/ java-1.8.0-openjdk-1.8.0.45-28.b13.el6_6.x86_64/java-1.7.0-openjdk.x86_64/ java-openjdk/[root@bogon ~]# ls /usr/lib/jvm/java-1.java-1.5.0-gcj-1.5.0.0/ java-1.8.0/java-1.7.0/ java-1.8.0-openjdk/java-1.7.0-openjdk-1.7.0.79.x86_64/ java-1.8.0-openjdk-1.8.0.45-28.b13.el6_6.x86_64/java-1.7.0-openjdk.x86_64/ [root@bogon ~]# ls /usr/lib/jvm/java-1.7.0-openjdkjava-1.7.0-openjdk-1.7.0.79.x86_64/ java-1.7.0-openjdk.x86_64/ [root@bogon ~]# ls /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.79.x86_64/ASSEMBLY_EXCEPTION bin demo include jre lib LICENSE sample src.zip tapset THIRD_PARTY_README[root@bogon ~]# |
重新配置环境变量，还是用，相对较流行的1.7的java吧（不用最新的1.8的java了）：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | [root@bogon ~]# vi ~/.bashrc# .bashrc# User specific aliases and functionsalias rm='rm -i'alias cp='cp -i'alias mv='mv -i'# Source global definitionsif [ -f /etc/bashrc ]; then . /etc/bashrcfiexport JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.79.x86_64export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jarexport PATH=$PATH:$JAVA_HOME/bin".bashrc" 17L, 368C written[root@bogon ~]# source ~/.bashrc [root@bogon ~]# echo $PATH/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.79.x86_64/bin[root@bogon ~]# java -versionjava version "1.7.0_79"OpenJDK Runtime Environment (rhel-2.5.5.3.el6_6-x86_64 u79-b14)OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode) |
【总结】
此处的CentOS 6中，默认已经安装了Java 1.7了，可通过：
java –version
去查看当前已安装的java版本。
然后也可以根据自己需要，去安装其他不同的版本，比如：
通过：
1 | yum search java |
找到很多不同版本：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | java-1.5.0-gcj.x86_64 : JPackage runtime compatibility layer for GCJjava-1.5.0-gcj-devel.x86_64 : JPackage development compatibility layer for GCJjava-1.5.0-gcj-javadoc.x86_64 : API documentation for libgcjjava-1.5.0-gcj-src.x86_64 : Source files for libgcjjava-1.6.0-openjdk.x86_64 : OpenJDK Runtime Environmentjava-1.6.0-openjdk-demo.x86_64 : OpenJDK Demosjava-1.6.0-openjdk-devel.x86_64 : OpenJDK Development Environmentjava-1.6.0-openjdk-javadoc.x86_64 : OpenJDK API Documentationjava-1.6.0-openjdk-src.x86_64 : OpenJDK Source Bundlejava-1.7.0-openjdk.x86_64 : OpenJDK Runtime Environmentjava-1.7.0-openjdk-demo.x86_64 : OpenJDK Demosjava-1.7.0-openjdk-devel.x86_64 : OpenJDK Development Environmentjava-1.7.0-openjdk-javadoc.noarch : OpenJDK API Documentationjava-1.7.0-openjdk-src.x86_64 : OpenJDK Source Bundlejava-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environmentjava-1.8.0-openjdk-demo.x86_64 : OpenJDK Demosjava-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environmentjava-1.8.0-openjdk-headless.x86_64 : OpenJDK Runtime Environmentjava-1.8.0-openjdk-javadoc.noarch : OpenJDK API Documentationjava-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundle |
根据需要，去安装自己想要的版本。
比如：
1 | yum install java-1.8.0-openjdk-devel.x86_64 |
然后，在安装完毕之后，再去设置对应的java的环境变量：
1 | vi ~/.bashrc |
添加对应的配置。此处还是使用默认安装的1.7版本的java：
1 2 3 | export JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.79.x86_64export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jarexport PATH=$PATH:$JAVA_HOME/bin |
可以根据自己的需求，把路径换成其他对应不同版本，即可。
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