实时控制log4j日志输出级别-Log4J日志级别控制中心

 

动态控制Log4J日志级别，只需要一个JSP页面即可。log4jCtl.jsp如下

<%@   page   language =   "java"   contentType   = "text/html; charset=UTF-8"

         pageEncoding = "UTF-8"   %>

<%@   page   import = "org.apache.log4j.*" %>

<%@   taglib   prefix = "c"   uri = "http://java.sun.com/jsp/jstl/core"   %>

< c:set   var = "basePath"   value = " ${pageContext.request.contextPath}   " />

DOCTYPE   html   PUBLIC   "-//W3C//DTD HTML 4.01 Transitional//EN"   "http://www.w3.org/TR/html4/loose.dtd"   >

< html >

         < head >

               < meta   http-equiv = "Content-Type"   content = "text/html; charset=UTF-8" >

               < title >   Log4J级别控制 title   >

               < style   type = "text/css"   >

               /* 超级链接样式 */

               a {

                  text-decoration :   none   ;

            }

               a:link   { text-decoration   : none   ;}

               a:visited   { text-decoration   : none ;}

               a:hover   { color   :   #F60 ;   text-decoration :   underline ;}

               a:active   { text-decoration   : underline ;}

            

               body   {

                  font :   normal 11px auto "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif ;

                  /*color: #4f6b72;

                background: #E6EAE9; */

            }

            

               #log-table   {

                  padding :   0   ;

                  margin :   5px 0   ;

            }

            

            tr {

                background :   #F5FAFA   ;

          }

            tr:nth-child(2n)   {

                background :   #fff   ;

          }

            tr {

                background-color :   expression(   ( this.sectionRowIndex   %   2   ==   0)   ?    "#F5FAFA"   :   "#fff" ) ;

          }

            td   {

                  border-right :   1px solid #C1DAD7   ;

                  border-bottom :   1px solid #C1DAD7   ;

                  font-size : 12px   ;

                  padding :   6px 6px 6px 12px   ;

                  /*color: #4f6b72; */

            }

               .left-border {

                     border-left :   1px solid #C1DAD7   ;

            }

               th   {

                  font :   bold 11px "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif ;

                  /*color: #4f6b72; */

                  border-right :   1px solid #C1DAD7   ;

                  border-bottom :   1px solid #C1DAD7   ;

                  border-top :   1px solid #C1DAD7   ;

                  letter-spacing :   2px   ;

                  /*text-transform: uppercase; */

                  text-align :   center   ;

                  padding :   6px 6px 6px 12px   ;

                  background :   #CAE8EA   ;

            }

               /*---------for IE 5.x bug*/

               html> body td   {

                     font-size : 12px   ;

            }

               style >

            

         head >

      

         < body >

               < h1 >   Log4J日志级别控制中心   h1 >

               < div >

                  显示   < a   href = "   ${basePath} /log4j.jsp?showAll=true" >   所有 Logger a >   | 显示 < a   href = " ${basePath}   /log4j.jsp?showAll=false"   > 当前运行的Logger a   >

               div >

               <%

            String logName = request.getParameter(   "log" );

            if   ( null   != logName) {

              Logger log = (   "" .equals(logName) ? Logger.getRootLogger() : Logger.getLogger(logName));

              log.setLevel(Level.toLevel(request.getParameter(   "level" ), Level.DEBUG));

          }

               %>

               < c:set   var = "rootLogger"   value = " <%=   Logger.getRootLogger()   %> "   />

               < form >

                     < table   id =   "log-table"   cellspacing   = "0"   >

                           < tr >

                                 < th   class = "left-border"   > Level   th >

                                 < th >   Logger th   >

                                 < th >   Set New Level th   >

                           tr >

                           < tr >

                                 < td   class = "left-border"   > ${rootLogger.level}   td >

                                 < td >   ${rootLogger.name} td   >

                                 < td >

                                       < c:forTokens   var = "level"   delims = ","   items = "ALL,TRACE,DEBUG,INFO,WARN,ERROR,FATAL,OFF"   >

                                             < a   href = "   ${basePath} /log4j.jsp?showAll= ${param.showAll}   &log=&level= ${level} " > ${level}   a >     |

                                       c:forTokens >

                                 td >

                           tr >

                           < c:forEach   var = "logger"   items = "   ${rootLogger.loggerRepository.currentLoggers} " >

                                 < c:if   test = "   ${! empty   logger.level.syslogEquivalent || param.showAll}   " >

                                       < tr >

                                             < c:if   test = "   ${! empty   logger.level.syslogEquivalent} " >

                                                   < td   class = "left-border"   > ${logger.level}   td >

                                                   < td >   ${logger.name} td   >

                                                   < td >  

                                                         < c:forTokens   var = "level"   delims = ","   items = "ALL,TRACE,DEBUG,INFO,WARN,ERROR,FATAL,OFF"   >

                                                               < a   href = "   ${basePath} /log4j.jsp?showAll= ${param.showAll}   &log= ${logger.name} &level= ${level} " >   ${level} a   >   |

                                                         c:forTokens >

                                                   td >

                                             c:if >

                                             < c:if   test = "   ${ empty   logger.level.syslogEquivalent} " >

                                                   < td   class = "left-border"   > ----   td >

                                                   < td >   ${logger.name} td   >

                                                   < td >              此Logger还未实例化运行   td >

                                             c:if >

                                       tr >

                                 c:if >

                           c:forEach >

table >

               form >

               < div >

                  显示   < a   href = "   ${basePath} /log4j.jsp?showAll=true" >   所有 Logger a >   | 显示 < a   href = " ${basePath}   /log4j.jsp?showAll=false"   > 当前运行的Logger a   >

               div >

         body >

html >