項(xiàng)目-提前下發(fā)

日志是應(yīng)日志是應(yīng) Apache在apache 到 Apachelog4j Apachelog4jLog4j的 Log4j配Log4J的配置文件(ConfigurationFile)就是用來設(shè)置記錄器的級(jí)別、存放器和布局的，它可接key=value格式的設(shè)置或xml格式的設(shè)置信息。通過配置，可以創(chuàng)建出Log4J1.#配置根log4j.rootLogger=[level],appenderName1,appenderName2,#配置日志信息輸出目的地log4j.appender.appenderName=.of.appender.classlog4j.appender.appenderName.option1=value1…log4j.appender.appenderName.optionN=log4j.appender.appenderName.layout=.of.layout.classlog4j.appender.appenderName.layout.option1=value1…log4j.appender.appenderName.layout.optionN=503467Appender為日志輸出目的地，Log4jappender文件Layout：日志輸出格式，Log4j提供的layout.apache.log4j.HTMLLayout（以HTML表格形式布局），打印參數(shù)Log4J采用類似C語言中的printf函數(shù)的打印格式格式化日志信息，如下 輸出優(yōu)先級(jí)，即 輸出自應(yīng)用啟動(dòng)到輸出該log 輸出日志時(shí)間點(diǎn)的日期或時(shí)間，默認(rèn)格式為ISO8601，也可以在其后指定格式，比如：%d{yyyMMMddHH:mm:ss,SSS}，輸出類似：20021018日221028 舉例：Testlog4.main(TestLog4.java:10)打印打印JavaLog4j示在代碼中初始化在程序中調(diào)用BasicConfigurator.configure()方法：給根記錄器增加一個(gè)ConsoleAppender還有根記錄器的默認(rèn)級(jí)別是Level.DEBUG.log4j默認(rèn)的初始化過程01package 09publicclassHMain staticLoggerlog4j= publi System.out.println("o,IamHMain"); privatevoid 9 0ce/myLog4j/WebContent/WEB-log4j.debug("log4j("log4jlog4j.warn("log4jlog4j.error("log4jlog4j.fatal("log4j30}Log4jLog4j配置文件（perties）打印01###setloglevels02log4j.rootLogger=debug, stdout, D, 0405log4j.appender.stdout= 06log4j.appender.stdout.=System.out07log4j.appender.stdout.layout= 08log4j.appender.stdout.layout.ConversionPattern %d{ABSOLUTE}%5p%c{1}:%L-log4j.appender.D=log4j.appender.D.File=log4j.appender.D.Append=log4j.appender.D.Threshold=DEBUGDEBUGlog4j.appender.D.layout=log4j.appender.D.layout.ConversionPattern=%-d{yyyy-MM-dd [%t:%r]-[%p] log4j.appender.E=log4j.appender.E.File=/logs/error.loglog4j.appender.E.Append=log4j.appender.E.ThresholdERRORERRORlog4j.appender.E.layout=log4j.appender.E.layout.ConversionPattern=%-d{yyyy-MM-dd [%l:%c:%t:%r]-[%p] 運(yùn)運(yùn)行結(jié)果下控制臺(tái)15:56:12,718DEBUGjava.lang.Class:24-log4jdebug15:56:12,722INFOjava.lang.Class:25-log4jinfo15:56:12,723WARNjava.lang.Class:26-log4jwarn15:56:12,723ERRORjava.lang.Class:27-log4jerror15:56:12,723FATALjava.lang.Class:28-log4j15:56:12[com.homer.HMain.printLog(HMain.java:24):java.lang.Class:http-bio-980-exec-3:0]-[DEBUG]log4j15:56:12[com.homer.HMain.printLog(HMain.java:25):java.lang.Class:http-bio-980-exec-3:4]-[INFO]log4j15:56:12[com.homer.HMain.printLog(HMain.java:26):java.lang.Class:http-bio-980-exec-3:5]-[WARN]log4j15:56:12[com.homer.HMain.printLog(HMain.java:27):java.lang.Class:http-bio-980-exec-3:5]-[ERROR]log4j15:56:12[com.homer.HMain.printLog(HMain.java:28):java.lang.Class:http-bio-980-exec-3:5]-[FATAL]log4j2012-09-2015:56:12[http-bio-9980-exec-3:0]-[DEBUG]log4j2012-09-2015:56:12[http-bio-9980-exec-3:4]-[INFO]log4j2012-09-2015:56:12[http-bio-9