Log4j的html输出格式：HTMLLayout 类重写,根据自身需要输出不同列

来源：互联网发布：linux中echo 编辑：程序博客网时间：2024/05/16 12:06

import java.text.SimpleDateFormat;     import org.apache.log4j.HTMLLayout;   import org.apache.log4j.Layout;   import org.apache.log4j.Level;   import org.apache.log4j.helpers.Transform;   import org.apache.log4j.spi.LocationInfo;   import org.apache.log4j.spi.LoggingEvent;       public class FormatHTMLLayout extends HTMLLayout {         public FormatHTMLLayout() {       }         protected final int BUF_SIZE = 256;         protected final int MAX_CAPACITY = 1024;         static String TRACE_PREFIX = "<br>    ";         private StringBuffer sbuf = new StringBuffer(BUF_SIZE);              String title="??2???";         /**       * A string constant used in naming the option for setting the the HTML       * document title. Current value of this string constant is <b>Title</b>.       */      public static final String TITLE_OPTION = "Title";         // Print no location info by default       boolean locationInfo = true;              public String format(LoggingEvent event) {           if (sbuf.capacity() > MAX_CAPACITY) {               sbuf = new StringBuffer(BUF_SIZE);           } else {               sbuf.setLength(0);           }           sbuf.append(Layout.LINE_SEP + "<tr>" + Layout.LINE_SEP);                              sbuf.append("<td>");           sbuf.append(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new java.util.Date()));           sbuf.append("</td>" + Layout.LINE_SEP);             sbuf.append("<td title=\"??±?>");           if (event.getLevel().equals(Level.FATAL)) {               sbuf.append("<font color=\"#339933\">");               sbuf.append(Transform.escapeTags(String.valueOf(event.getLevel())));               sbuf.append("</font>");           } else if (event.getLevel().isGreaterOrEqual(Level.WARN)) {               sbuf.append("<font color=\"#993300\"><strong>");               sbuf.append(Transform.escapeTags(String.valueOf(event.getLevel())));               sbuf.append("</strong></font>");           } else {               sbuf.append("<font color=\"green\">");               sbuf.append(Transform.escapeTags(String.valueOf(event.getLevel())));               sbuf.append("</font>");           }           sbuf.append("</td>" + Layout.LINE_SEP);                 if (locationInfo) {               LocationInfo locInfo = event.getLocationInformation();               sbuf.append("<td title=\"?o?">");              sbuf.append(Transform.escapeTags(locInfo.getFileName()));              sbuf.append(':');              sbuf.append(locInfo.getLineNumber());              sbuf.append("</td>" + Layout.LINE_SEP);          }                                 sbuf.append("<td title=\"??х?\">");           sbuf.append(Transform.escapeTags(event.getRenderedMessage()));           sbuf.append("</td>" + Layout.LINE_SEP);           sbuf.append("</tr>" + Layout.LINE_SEP);             if (event.getNDC() != null) {               sbuf.append("<tr><td bgcolor=\"#EEEEEE\" style=\"font-size : xx-small;\" colspan=\"6\" title=\"Nested Diagnostic Context\">");               sbuf.append("NDC: " + Transform.escapeTags(event.getNDC()));               sbuf.append("</td></tr>" + Layout.LINE_SEP);           }             String[] s = event.getThrowableStrRep();           if (s != null) {               sbuf.append("<tr><td bgcolor=\"#993300\" style=\"color:White; font-size : xx-small;\" colspan=\"4\">");               appendThrowableAsHTML(s, sbuf);               sbuf.append("</td></tr>" + Layout.LINE_SEP);           }           return sbuf.toString();       }         private void appendThrowableAsHTML(String[] s, StringBuffer sbuf) {           if (s != null) {               int len = s.length;               if (len == 0)                   return;               sbuf.append(Transform.escapeTags(s[0]));               sbuf.append(Layout.LINE_SEP);               for (int i = 1; i < len; i++) {                   sbuf.append(TRACE_PREFIX);                   sbuf.append(Transform.escapeTags(s[i]));                   sbuf.append(Layout.LINE_SEP);               }           }       }         /**       * Returns appropriate HTML headers.       */      public String getHeader() {           StringBuffer sbuf = new StringBuffer();           sbuf.append("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">" + Layout.LINE_SEP);           sbuf.append("<html>" + Layout.LINE_SEP);           sbuf.append("<head>" + Layout.LINE_SEP);               sbuf.append("<title>" + title + "</title>" + Layout.LINE_SEP);           sbuf.append("<style type=\"text/css\">" + Layout.LINE_SEP);           sbuf.append("<!--" + Layout.LINE_SEP);           sbuf.append("body, table {font-family: '??',arial,sans-serif; font-size: 12px;}" + Layout.LINE_SEP);           sbuf.append("th {background: #336699; color: #FFFFFF; text-align: left;}" + Layout.LINE_SEP);           sbuf.append("-->" + Layout.LINE_SEP);           sbuf.append("</style>" + Layout.LINE_SEP);           sbuf.append("</head>" + Layout.LINE_SEP);           sbuf.append("<body bgcolor=\"#FFFFFF\" topmargin=\"6\" leftmargin=\"6\">" + Layout.LINE_SEP);               sbuf.append("<table cellspacing=\"0\" cellpadding=\"4\" border=\"1\" bordercolor=\"#224466\" width=\"100%\">" + Layout.LINE_SEP);           sbuf.append("<tr>" + Layout.LINE_SEP);                  sbuf.append("<th>?????th>" + Layout.LINE_SEP);           sbuf.append("<th>??±?h>" + Layout.LINE_SEP);                 if (locationInfo) {               sbuf.append("<th>???</th>" + Layout.LINE_SEP);           }              sbuf.append("<th>х?</th>" + Layout.LINE_SEP);           sbuf.append("</tr>" + Layout.LINE_SEP);           sbuf.append("<br></br>" + Layout.LINE_SEP);           return sbuf.toString();       }     }

配置文件：

log4j.rootLogger=DEBUG,A1,Rlog4j.appender.A1=org.apache.log4j.ConsoleAppenderlog4j.appender.A1.layout=org.apache.log4j.PatternLayoutlog4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss,SSS} [%c]-[%p] %m%nlog4j.appender.R=org.apache.log4j.RollingFileAppenderlog4j.appender.R.File=sys_ztb_log.htmllog4j.appender.R.MaxFileSize=4000KBlog4j.appender.R.MaxBackupIndex=1log4j.appender.R.layout=com.dcsoft.ztb.util.FormatHTMLLayout#log4j.appender.R.layout=org.apache.log4j.HTMLLayout#log4j.appender.R.layout=org.apache.log4j.PatternLayoutlog4j.appender.R.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c] [%p] - %m%n

运行效果：

参考资料：http://blog.163.com/chenluyu0910@126/blog/static/99042293201121051050/?suggestedreading