我需要从XML中提取值并按需更新元素值。我试图使用xmlstarlet实用程序从XML中提取值，但它不适用于复杂的xml结构。
使用过的命令： cat server.xml | xml sel -NP = http://www.ibm.com/websphere/appserver/schemas/5.0/processexec.xmi -NC =“http://www.omg.org/XMI”-t -m“/ P：process / P：Server / P：processDefinitions / P：jvmEntries / P： classpath“-v。
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179 <components xmi:type="applicationserver.sipcontainer:SIPContainer" xmi:id="SIPContainer_1450084659639" name="" maxAppSessions="120000" maxMessageRate="5000" maxDispat chQueueSize="3200" maxResponseTime="0" statAveragePeriod="1000" statUpdateRange="10000">
180 <stack xmi:id="Stack_1450084659639">
181 <timers xmi:id="Timers_1450084659639"/>
182 </stack>
183 </components>
184 <webserverPluginSettings xmi:id="WebserverPluginSettings_1450084659639" WaitForContinue="false" ConnectTimeout="60" MaxConnections="80" ExtendedHandshake="false" Serv erIOTimeout="600"/>
185 </components>
186 <processDefinitions xmi:type="processexec:JavaProcessDef" xmi:id="JavaProcessDef_1450084659639" workingDirectory="${USER_INSTALL_ROOT}" executableTargetKind="JAVA_CLASS " executableTarget="com.ibm.ws.runtime.WsServer">
187 <execution xmi:id="ProcessExecution_1450084659639" processPriority="20" runAsUser="" runAsGroup=""/>
188 <ioRedirect xmi:id="OutputRedirect_1450084659639" stdoutFilename="${SERVER_LOG_ROOT}/native_stdout.log" stderrFilename="${SERVER_LOG_ROOT}/native_stderr.log"/>
189 <monitoringPolicy xmi:id="MonitoringPolicy_1450084659639" maximumStartupAttempts="3" pingInterval="600" pingTimeout="300" autoRestart="false" nodeRestartState="STOPPE D"/>
190 <jvmEntries xmi:id="JavaVirtualMachine_1450084659639" verboseModeClass="false" verboseModeGarbageCollection="true" verboseModeJNI="false" initialHeapSize="3072" maxim umHeapSize="3072" runHProf="false" hprofArguments="" debugMode="false" debugArgs="-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=7777" genericJvmArguments= "-Demt.was.appname=LOBCProfile01 -Demt.was.debug=false -Demt.was.home=/upppasr1/ZIBEUAT2/was-bin/ZIBE/emt-was/855 -Demt.core.home=/upppasr1/ZIBEUAT2/was-bin/ZIBE/emt-was/ 855 -Dcom.ibm.websphere.security.util.createBackup=false -Dcom.ibm.wsspi.security.crypto.customPasswordEncryptionClass=com.itic.emt.was.security.CustomEncryptionImpl -Dco m.ibm.wsspi.security.crypto.customPasswordEncryptionEnabled=true -Demt.was.servername=APP_A1_KHBCG -Xmn512M -Xverify:none -Xgcpolicy:gencon -Xdisableexplicitgc -Xverboseg clog:${SERVER_LOG_ROOT}/native_stderr.log.%Y%m%d.%H%M%S.%pid,7,10000 -javaagent:/opt/appdyn/javaagent-ibm/4.2.1.8/javaagent.jar -Dappdynamics.controller.hostName=appdyn- nam-gcg-test-2.nam.nsroot.net -Dappdynamics.controller.port=8181 -Dappdynamics.agent.applicationName=153583_GCB-LOBC-GM-HK_APAC_UAT -Dappdynamics.agent.nodeName=tcwgwm-LO BCa09u_null_APP_A1_KHBCG -Dappdynamics.agent.tierName=LOBC_HK_WAS -Dappdynamics.agent.logs.dir=/upppwsr1/ZIBEUAT2/was-apps/ZIBE/ZIBE_Runtime/profiles/ZIBECell/LOBCProfile 01/logs/APP_A1_KHBCG -Dappdynamics.controller.ssl.enabled=true -Dappdynamics.force.default.ssl.certificate.validation=true -Dappdynamics.agent.accountName=customer1 -Dapp dynamics.agent.accountAccessKey=ef0334ff-7c79-4f78-a7eb-7d2fa4e0a325 -Dappdynamics.agent.ssl.protocol=TLSv1.2" executableJarFileName="" disableJIT="false">
191 <classpath>/anc/sdfd/jab.jar:[]</classpath>
192 <systemProperties xmi:id="Property_1450084659646" name="com.ibm.security.jgss.debug" value="off" required="false"/>
193 <systemProperties xmi:id="Property_1450084659647" name="com.ibm.security.krb5.Krb5Debug" value="off" required="false"/>
194 <systemProperties xmi:id="Property_1450697072560" name="HttpSessionReaperPollInterval" value="30" required="false"/>
195 <systemProperties xmi:id="Property_1450697072628" name="config_consistency_check" value="false" required="false"/>
196 <systemProperties xmi:id="Property_1450697072647" name="javax.net.debug" value="false" required="false"/>
197 <systemProperties xmi:id="Property_1465366047008" name="com.ibm.websphere.webservices.DisableIBMJAXWSEngine" value="true" required="false"/>
198 </jvmEntries>
199 </processDefinitions>
200 </process:Server>
答案 0 :(得分：0)
似乎您的给定xml未满。但是，我清楚地了解到，您试图解析websphere appserver server.xml。它可以很容易地实现。 附上脚本供您理解。希望它能满足您的要求。
echo＆＃34; JVM条目＆＃34; cat server.xml | xmlstarlet sel -t \ -m＆＃34; / process：Server / processDefinitions / jvmEntries＆＃34; -v＆＃34; concat（＆＃39; InitialHeapSize：＆＃39;，@ initialHeapSize，＆＃39; MaximumHeapSize：＆＃39;，@ maximumHeapSize）＆＃34; -n \ -m＆＃34; / process：Server / processDefinitions / jvmEntries / @ verboseModeGarbageCollection＆＃34; -v＆＃34; concat（＆＃39; verboseModeGarbageCollection＆＃39;，@ verboseModeGarbageCollection）＆＃34; -n \ -m＆＃34; / process：Server / processDefinitions / jvmEntries / @ genericJvmArguments＆＃34; -v＆＃34; concat（＆＃39; GenericJvmArguments：＆＃39;，。）＆＃34; -n \ -m＆＃34; / process：Server / processDefinitions / jvmEntries / systemProperties＆＃34; -v＆＃34; concat（＆＃39; JvmPropertyName：＆＃39;，@ name，＆＃39; Value：＆＃39;，@ value）＆＃34; -n echo＆＃34; ThreadPools＆＃34; cat server.xml | xmlstarlet sel -t -m＆＃34; / process：Server / services / threadPools＆＃34; -v＆＃34; concat（＆＃39; ThreadPoolName：＆＃39;，@ name，＆＃39; 〜＆＃39;，＆＃39; minimumSize：＆＃39;，@ minimumSize，＆ ＃39; 〜＆＃39;＆＃39; MAXIMUMSIZE：＆＃39;，@ MAXIMUMSIZE，＆＃39; *〜＆＃39;＆＃39; inactivityTimeout：＆＃39;，@ inactivityTimeout）＆＃34; -n
xmlstarlet sel -t -m＆＃34; / process：Server / services / threadPools [@name =＆＃39; WebContainer＆＃39;]＆＃34; -v＆＃34; concat（＆＃39; ThreadPoolName：＆＃39;，@ name，＆＃39; 〜＆＃39;，＆＃39; minimumSize：＆＃39;，@ minimumSize，＆ ＃39; 〜＆＃39;＆＃39; MAXIMUMSIZE：＆＃39;，@ MAXIMUMSIZE，＆＃39; *〜＆＃39;＆＃39; inactivityTimeout：＆＃39;，@ inactivityTimeout）＆＃34; server.xml中