tomcat下面的各個日志

原文連接： https://www.cnblogs.com/qlqwjy/p/8036091.html

 

一、　　認識各種目錄的作用及記錄的信息

目錄

 

1.catalina.日期.log

　　這個主要是記錄tomcat啟動時候的信息，類似於我們在eclipse中啟動服務的時候在控制台看到的信息。在里面可以看到 啟動的JVM參數以及操作系統等日志信息。如果沒有使用log4j等日志機制，系統的的錯誤信息與打印語句也在這個日志文件中記錄。(linux下所有的日志都在catalina.out中)

例如:

十二月 14, 2017 11:04:27 下午 org.apache.tomcat.util.digester.SetPropertiesRule begin
警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'debug' to '0' did not find a matching property.
十二月 14, 2017 11:04:27 下午 org.apache.tomcat.util.digester.SetPropertiesRule begin
警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'debug' to '0' did not find a matching property.
十二月 14, 2017 11:04:27 下午 org.apache.tomcat.util.digester.SetPropertiesRule begin
警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'debug' to '0' did not find a matching property.
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server version:        Apache Tomcat/7.0.72
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server built:          Sep 14 2016 12:12:26 UTC
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server number:         7.0.72.0
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: OS Name:               Windows 8
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: OS Version:            6.2
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Architecture:          amd64
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Java Home:             C:\Program Files\Java2\jdk1.7.0_80\jre
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: JVM Version:           1.7.0_80-b15
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: JVM Vendor:            Oracle Corporation
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: CATALINA_BASE:         E:\tomcat\apache-tomcat-7.0.72
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: CATALINA_HOME:         E:\tomcat\apache-tomcat-7.0.72
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dcatalina.home=E:\tomcat\apache-tomcat-7.0.72
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dcatalina.base=E:\tomcat\apache-tomcat-7.0.72
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Djava.endorsed.dirs=E:\tomcat\apache-tomcat-7.0.72\endorsed
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Djava.io.tmpdir=E:\tomcat\apache-tomcat-7.0.72\temp
十二月 14, 2017 11:04:27 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
十二月 14, 2017 11:04:28 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Djava.util.logging.config.file=E:\tomcat\apache-tomcat-7.0.72\conf\logging.properties
十二月 14, 2017 11:04:28 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: exit
十二月 14, 2017 11:04:28 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Xms3500m
十二月 14, 2017 11:04:28 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Xmx3500m
十二月 14, 2017 11:04:28 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Xss1024k
十二月 14, 2017 11:04:28 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent
信息: Loaded APR based Apache Tomcat Native library 1.2.8 using APR version 1.5.2.
十二月 14, 2017 11:04:28 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent
信息: APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true].
十二月 14, 2017 11:04:29 下午 org.apache.catalina.core.AprLifecycleListener initializeSSL
信息: OpenSSL successfully initialized (OpenSSL 1.0.2h  3 May 2016)
十二月 14, 2017 11:04:29 下午 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["http-nio-80"]
十二月 14, 2017 11:04:29 下午 org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
信息: Using a shared selector for servlet write/read
十二月 14, 2017 11:04:29 下午 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["ajp-apr-8009"]
十二月 14, 2017 11:04:29 下午 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 5531 ms
十二月 14, 2017 11:04:29 下午 org.apache.catalina.core.StandardService startInternal
信息: Starting service Catalina
十二月 14, 2017 11:04:30 下午 org.apache.catalina.core.StandardEngine startInternal
信息: Starting Servlet Engine: Apache Tomcat/7.0.72
十二月 14, 2017 11:04:31 下午 org.apache.catalina.util.SessionIdGeneratorBase createSecureRandom
信息: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [367] milliseconds.
十二月 14, 2017 11:04:32 下午 org.apache.catalina.startup.HostConfig deployDescriptor
信息: Deploying configuration descriptor E:\tomcat\apache-tomcat-7.0.72\conf\Catalina\localhost\Exam.xml
十二月 14, 2017 11:04:32 下午 org.apache.catalina.startup.SetContextPropertiesRule begin
警告: [SetContextPropertiesRule]{Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Exam' did not find a matching property.
十二月 14, 2017 11:04:42 下午 org.apache.catalina.startup.TldConfig execute
信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
十二月 14, 2017 11:05:01 下午 org.apache.catalina.startup.HostConfig deployDescriptor
信息: Deployment of configuration descriptor E:\tomcat\apache-tomcat-7.0.72\conf\Catalina\localhost\Exam.xml has finished in 29,545 ms
十二月 14, 2017 11:05:01 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory E:\tomcat\apache-tomcat-7.0.72\webapps\docs
十二月 14, 2017 11:05:02 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deployment of web application directory E:\tomcat\apache-tomcat-7.0.72\webapps\docs has finished in 227 ms
十二月 14, 2017 11:05:02 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory E:\tomcat\apache-tomcat-7.0.72\webapps\examples
十二月 14, 2017 11:05:02 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deployment of web application directory E:\tomcat\apache-tomcat-7.0.72\webapps\examples has finished in 659 ms
十二月 14, 2017 11:05:02 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory E:\tomcat\apache-tomcat-7.0.72\webapps\host-manager
十二月 14, 2017 11:05:02 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deployment of web application directory E:\tomcat\apache-tomcat-7.0.72\webapps\host-manager has finished in 192 ms
十二月 14, 2017 11:05:02 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory E:\tomcat\apache-tomcat-7.0.72\webapps\manager
十二月 14, 2017 11:05:03 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deployment of web application directory E:\tomcat\apache-tomcat-7.0.72\webapps\manager has finished in 134 ms
十二月 14, 2017 11:05:03 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory E:\tomcat\apache-tomcat-7.0.72\webapps\ROOT
十二月 14, 2017 11:05:03 下午 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deployment of web application directory E:\tomcat\apache-tomcat-7.0.72\webapps\ROOT has finished in 106 ms
十二月 14, 2017 11:05:03 下午 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["http-nio-80"]
十二月 14, 2017 11:05:03 下午 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["ajp-apr-8009"]
十二月 14, 2017 11:05:03 下午 org.apache.catalina.startup.Catalina start
信息: Server startup in 33450 ms

 

 

2.commons-daemon.日期.log

　　這個日期放的估計是利用服務方式啟動tomcat作為守護進程的日志記錄，因為我的tomcat啟動方式是以服務的方式啟動的，索引產生這個日志文件記錄了服務的啟動狀態。

例如:

[2017-12-16 15:45:49] [info] [1706572] Commons Daemon procrun (1.0.15.0 64-bit) started [2017-12-16 15:45:49] [info] [1706572] Running 'Tomcat7' Service... [2017-12-16 15:45:49] [info] [1706632] Starting service... [2017-12-16 15:45:51] [info] [1706632] Service started in 1617 ms. [2017-12-16 15:50:57] [info] [1716024] Stopping service... [2017-12-16 15:50:58] [info] [1716024] Service stop thread completed. [2017-12-16 15:50:59] [info] [1706572] Run service finished. [2017-12-16 15:50:59] [info] [1706572] Commons Daemon procrun finished [2017-12-16 15:51:21] [info] [1711056] Commons Daemon procrun (1.0.15.0 64-bit) started [2017-12-16 15:51:22] [info] [1711056] Running 'Tomcat7' Service... [2017-12-16 15:51:22] [info] [1716072] Starting service... [2017-12-16 15:51:23] [info] [1716072] Service started in 1511 ms.

 

 

3.host-manager.日期.log

　　這個估計是放tomcat的自帶的manager項目的日志信息的，也沒有看到有什么重要的日志信息

4.localhost.日期.log

　　這個類似於第一種日志，可是信息沒有第一種全

5.localhost_access_log.日期.txt

　　這個是存放訪問tomcat的請求的所有地址以及請求的路徑、時間，請求協議以及返回碼等信息(重要)

例如:

0:0:0:0:0:0:0:1 - - [14/Dec/2017:23:24:03 +0800] "GET /Exam/image/newsLogo.jpg HTTP/1.1" 304 -
0:0:0:0:0:0:0:1 - - [14/Dec/2017:23:24:06 +0800] "POST /Exam/train_findStudyTraincontentByFy.action HTTP/1.1" 200 25
0:0:0:0:0:0:0:1 - - [14/Dec/2017:23:24:06 +0800] "POST /Exam/newsIP_getTypeNews.action HTTP/1.1" 200 258
0:0:0:0:0:0:0:1 - - [14/Dec/2017:23:24:06 +0800] "POST /Exam/newsIP_getTypeNews.action HTTP/1.1" 200 2338

 

6.manager.日志.log

　　這個估計也是manager項目專有的日志文件，看不出有什么重要的信息

7.tomcat7-stderr.日期.log　　

　　這個是log4j的錯誤日志，因此在程序中要合理的捕捉異常。

8.tomcat7-stdout.日期.log　　(類似於eclipse的控制台的信息)

　　這個是程序中的System語句打印的日志(包括系統拋出的異常)，也終於明白了為什么一再強調不能用打印語句進行系統調試

 

針對上面7,8做的測試:

log4j.properties

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###
#\u5728\u5F00\u53D1\u9636\u6BB5\u65E5\u5FD7\u7EA7\u522B\u4F7F\u7528debug
log4j.rootLogger=error, stdout
### \u5728\u65E5\u5FD7\u4E2D\u8F93\u51FAsql\u7684\u8F93\u5165\u53C2\u6570 ###
#log4j.logger.cn.xm.exam.mapper.exam=TRACE

 

TestAction.java

package cn.xm.exam.action.exam.exam; import javax.management.RuntimeErrorException; import org.springframework.context.annotation.Scope; import org.springframework.stereotype.Controller; import com.opensymphony.xwork2.ActionSupport; import jxl.common.Logger; @Controller @Scope("prototype") public class TestAction extends ActionSupport { private Logger logger = Logger.getLogger(TestAction.class); public String syso() { System.out.println("這是打印語句"); return SUCCESS; } public String loginfo() { logger.info("這是info方法的記錄信息"); return SUCCESS; } public String error() { try { int i = 1 / 0; } catch (Exception e) { logger.error("故意除零了", e); } return SUCCESS; } public String notcatch() { int i = 1 / 0; return SUCCESS; } public String runtimeexe() { try { int i = 1 / 0; } catch (Exception e) { throw new RuntimeException("除零運行時異常", e); } return SUCCESS; } }

 

 

struts配置

        <!-- 全局結果集，將response轉換為json傳到前台 -->
        <global-results>
            <result name="success" type="json">
                <param name="root">response</param>
            </result>
        </global-results>
        <action name="test_*" class="testAction" method="{1}"></action>

 (1)訪問:http://localhost/Exam/test_syso.action

　tomcat7-stdout.2017-12-14.log中多一條:　　　　　這是打印語句(每次訪問日志都會記錄下來)

(2)訪問:http://localhost/Exam/test_loginfo.action

　tomcat7-stdout.2017-12-14.log中多出上面的日志記錄信息，設置log4j的日志級別為error則不會在日志文件中記錄此信息。

2017-12-16 15:51:22 Commons Daemon procrun stdout initialized
這是打印語句
這是打印語句
這是打印語句
這是打印語句
這是打印語句
這是打印語句
這是info方法的記錄信息
這是info方法的記錄信息

 

（3）訪問:http://localhost/Exam/test_error.action

　　tomcat7-stderr.2017-12-15.log會記錄錯誤信息:

Error: 故意除零了
java.lang.ArithmeticException: / by zero at cn.xm.exam.action.exam.exam.TestAction.error(TestAction.java:29) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:871) at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1294) at ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68) at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:117) at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:108) at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1370) at ognl.ASTMethod.getValueBody(ASTMethod.java:91) at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) at ognl.SimpleNode.getValue(SimpleNode.java:258) at ognl.Ognl.getValue(Ognl.java:467) at ognl.Ognl.getValue(Ognl.java:431) at com.opensymphony.xwork2.ognl.OgnlUtil$3.execute(OgnlUtil.java:352) at com.opensymphony.xwork2.ognl.OgnlUtil.compileAndExecuteMethod(OgnlUtil.java:404) at com.opensymphony.xwork2.ognl.OgnlUtil.callMethod(OgnlUtil.java:350) at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:430) at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:290) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:251) at org.apache.struts2.interceptor.DeprecationInterceptor.intercept(DeprecationInterceptor.java:41) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:168) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265) at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:76) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:125) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:253) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:140) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54) at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:575) at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.logging.log4j.core.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:66) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1083) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:640) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1756) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1715) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)

 (4)對於未捕捉的異常也會在tomcat7-stdout.日期.log記錄。也就是會在控制台的地方打印，如果未攔截會拋給用戶。

 

 

 (5)訪問:http://localhost/Exam/test_runtimeexe.action 

　　同樣會在tomcat7-stdout.日期.log記錄

 

 

 　　總結:

　　　　系統中不能使用System,out。。。打印的方式進行調試，這些最后都會保存到日志文件浪費內存。可以使用log4j的info進行調試，最后發布的時候將log4j的日志級別調高則不會打印在日志文件中，這也是開發的一條重要原則。

　　　　系統中隊異常要進行捕獲，這樣發布后可以在日志中更好的查看錯誤信息，同時不會把日志拋給用戶。

　　　　　　　　

 

 

 

 

二、設置日志級別以及輸出位置

1.讓所有文件都輸出到同一個文件中

 打開Tomcat目錄conf\logging.properties，修改如下，所有日志輸出到tomcat開頭的文件中

1catalina.org.apache.juli.FileHandler.level = FINE

1catalina.org.apache.juli.FileHandler.directory = ${catalina.base}/logs

# 1catalina.org.apache.juli.FileHandler.prefix = catalina.

1catalina.org.apache.juli.FileHandler.prefix = tomcat.

 

2localhost.org.apache.juli.FileHandler.level = FINE

2localhost.org.apache.juli.FileHandler.directory = ${catalina.base}/logs

# 2localhost.org.apache.juli.FileHandler.prefix = localhost.

2localhost.org.apache.juli.FileHandler.prefix = tomcat.

 

3manager.org.apache.juli.FileHandler.level = FINE

3manager.org.apache.juli.FileHandler.directory = ${catalina.base}/logs

# 3manager.org.apache.juli.FileHandler.prefix = manager.

3manager.org.apache.juli.FileHandler.prefix = tomcat.

 

4host-manager.org.apache.juli.FileHandler.level = FINE

4host-manager.org.apache.juli.FileHandler.directory = ${catalina.base}/logs

# 4host-manager.org.apache.juli.FileHandler.prefix = host-manager.

4host-manager.org.apache.juli.FileHandler.prefix = tomcat.

 

2.打開訪問日志

編輯 ${catalina}/conf/server.xml 文件. 注 :${catalina} 是 tomcat 的安裝目錄

 <!--

 

 

 

pattern可以修改格式

common 的值： %h %l %u %t %r %s %b

pattern 也可以根據需要自由組合, 例如 pattern="%h %l"

對於各fields字段的含義請參照 :

http://tomcat.apache.org/tomcat-6.0-doc/config/valve.html 中的 Access Log Valve 項

3.修改tomcat日志級別

Tomcat 日志分為下面５類：

catalina 、 localhost 、 manager 、 admin 、 host-manager

每類日志的級別分為如下 7 種：

SEVERE (highest value) > WARNING > INFO > CONFIG > FINE > FINER > FINEST (lowest value)

日志級別的設定方法

修改 conf/logging.properties 中的內容，設定某類日志的級別

示例：

 

設置 catalina 日志的級別為： FINE

1catalina.org.apache.juli.FileHandler.level = FINE

 

禁用 catalina 日志的輸出：

1catalina.org.apache.juli.FileHandler.level = OFF

 

輸出 catalina 所有的日志消息均輸出：

1catalina.org.apache.juli.FileHandler.level = ALL