關(guān)于Log4j的使用看代碼吧！注釋寫的很詳細(xì)，苦于沒有運(yùn)行日志信息的代碼，寫那些helloworld顯得不合適，寫出了五種遍歷List的方法，沒有專門的測試工具測試他們運(yùn)行的效率，哪位要是能測試一下，煩請告訴具體情況！
package org.bulktree.log4j;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Logger;
public class Log4jTest 
{
// 獲取日志記錄器
static Logger logger = Logger.getLogger(Log4jTest.class);
// static Logger logger = Logger.getLogger(Log4jTest.class.getName());
Log4jTest() {
// 配置日志環(huán)境
// 使用缺省Log4j環(huán)境
BasicConfigurator.configure();
// 讀取使用Java屬性文件編寫的配置文件
// PropertyConfigurator.configure("log4j.properties");
// 讀取XML形式的配置文件
// DOMConfigurator.configure(String filename);
}
public static void main(String[] args) {
logger.debug("Log4jTest-->>debug");
logger.info("Log4jTest-->>info");
logger.warn("Log4jTest-->>warn");
logger.error("Log4jTest-->>error");
System.out.println("************test****************");
List<String> list = new ArrayList<String>();
list.add("BULKTREE");
logger.debug("debug-->>List Success! " + "list information: " + list);
logger.info("info-->>List Success! " + "list information: " + list);
logger.warn("warn-->>List Success! " + "list information: " + list);
logger.error("error-->>List Success! " + "list information: " + list);
list.add("LAOSHULIN");
logger.debug("debug-->>List Success! " + "list information: " + list);
logger.info("info-->>List Success! " + "list information: " + list);
logger.warn("warn-->>List Success! " + "list information: " + list);
logger.error("error-->>List Success! " + "list information: " + list);
list.add("OAKERTREE");
logger.debug("debug-->>List Success! " + "list information: " + list);
logger.info("info-->>List Success! " + "list information: " + list);
logger.warn("warn-->>List Success! " + "list information: " + list);
logger.error("error-->>List Success! " + "list information: " + list);
list.add("BULKTREE.LAOSHULIN.OAKERTREE");
logger.debug("debug-->>List Success! " + "list information: " + list);
logger.info("info-->>List Success! " + "list information: " + list);
logger.warn("warn-->>List Success! " + "list information: " + list);
logger.error("error-->>List Success! " + "list information: " + list);
Log4jTest lt = new Log4jTest();
lt.firstReadList(list);
lt.secendReadList(list);
lt.threeReadList(list);
lt.fourReadList(list);
lt.fiveReadList(list);
}
public void firstReadList(List<String> list) {
for (Iterator<String> iter = list.iterator(); iter.hasNext();) {
String str = iter.next();
logger.debug("debug-->>Iterator have next element:" + str);
logger.info("info-->>Iterator have next element:" + str);
logger.warn("warn-->>Iterator have next element:" + str);
logger.error("error-->>Iterator have next element:" + str);
System.out.println("*********" + str);
}
}
public void secendReadList(List<String> list) {
for (int i = 0; i < list.size(); i++) {
String str = list.get(i);
logger.debug("debug-->>Iterator have next element:" + str);
logger.info("info-->>Iterator have next element:" + str);
logger.warn("warn-->>Iterator have next element:" + str);
logger.error("error-->>Iterator have next element:" + str);
System.out.println("========" + str);
}
}
public void threeReadList(List<String> list) {
for (String str : list) {
logger.debug("debug-->>Iterator have next element:" + str);
logger.info("info-->>Iterator have next element:" + str);
logger.warn("warn-->>Iterator have next element:" + str);
logger.error("error-->>Iterator have next element:" + str);
System.out.println("&&&&&&&&" + str);
}
}
public void fourReadList(List<String> list) {
for (int i = 0, a = list.size(); i < a; i++) {
String str = list.get(i);
logger.debug("debug-->>Iterator have next element:" + str);
logger.info("info-->>Iterator have next element:" + str);
logger.warn("warn-->>Iterator have next element:" + str);
logger.error("error-->>Iterator have next element:" + str);
System.out.println("########" + str);
}
}
public void fiveReadList(List<String> list) {
Iterator<String> iter = list.iterator();
while (iter.hasNext()) {
String str = iter.next();
logger.debug("debug-->>Iterator have next element:" + str);
logger.info("info-->>Iterator have next element:" + str);
logger.warn("warn-->>Iterator have next element:" + str);
logger.error("error-->>Iterator have next element:" + str);
System.out.println("$$$$$$$$" + str);
}
}
}
# An example log4j configuration file that outputs to System.out. The
# output information consists of relative time, log level, thread
# name, logger name, nested diagnostic context and the message in that
# order.
# For the general syntax of property based configuration files see the
# documenation of org.apache.log4j.PropertyConfigurator.
#配置根Logger,語法為：log4j.rootLogger=[level],appenderName,appenderName,.
#level是日志記錄器的優(yōu)先級(jí)，Log4j建議只使用四個(gè)級(jí)別，從高到低分別是ERROR,
#WARN,INFO,DEBUG,通過在這里定義的級(jí)別，您可以控制到應(yīng)用程序中相應(yīng)級(jí)別的日志信息的開關(guān)。
#比如在這里定義了INFO級(jí)別，則應(yīng)用程序中所有DEBUG級(jí)別的日志信息將不被打印出來
#appenderName指的是制定日志信息輸出到哪個(gè)地方
#A1標(biāo)識(shí)輸出控制臺(tái)，A2標(biāo)識(shí)輸出到日志文件
log4j.rootLogger=DEBUG, A1,A2
#Log4j提供的appender有以下幾種：
#org.apache.log4j.ConsoleAppender(控制臺(tái))
#org.apache.log4j.FileAppender(文件)
#org.apache.log4j.DailyRollingFileAppender（每天產(chǎn)生一個(gè)日志文件）
#org.apache.log4j.RollingFileAppender（文件大小到達(dá)指定尺寸的時(shí)候產(chǎn)生一個(gè)新的文件）
#org.apache.log4j.WriterAppender（將日志信息以流格式發(fā)送到任意指定的地方
# A1 is set to be a ConsoleAppender which outputs to System.out.
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A2=org.apache.log4j.RollingFileAppender
log4j.appender.A2.File=Log4jTest.log
#如果超過20KB則自動(dòng)新建一個(gè)文件，文件名后面自動(dòng)加序號(hào)
log4j.appender.A2.MaxFileSize=20KB
# A1 uses PatternLayout.
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
# The conversion pattern uses format specifiers. You might want to
# change the pattern an watch the output format change.
log4j.appender.A1.layout.ConversionPattern=%-4r %-5p [%t] %37c %3x - %m%n
# In this example, we are not really interested in INNER loop or SWAP
# messages. See the effects of uncommenting and changing the levels of
# the following loggers.
# log4j.logger.org.apache.log4j.examples.SortAlgo.INNER=WARN
# log4j.logger.org.apache.log4j.examples.SortAlgo.SWAP=WARN
# Keep one backup file
log4j.appender.A2.MaxBackupIndex=1
log4j.appender.A2.layout=org.apache.log4j.PatternLayout
log4j.appender.A2.layout.ConversionPattern=%p %t %c - %m%n
# Print only messages of level WARN or above in the package com.foo.
log4j.logger.org.bulktree=DEBUG
posted on 2008-08-13 13:59
凌晨風(fēng) 閱讀(2104)
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