tomcat 日誌 java.util.logging.Logger使用 （四）

今天將寫好的代碼放到ubuntu上測試，發現了幾個問題。

1：每次svn update源碼，tomcat重新部署以後 log 檔案會消失~~

查看源碼發現：

java.util.logging.FileHandlerprivate void configure() {        LogManager manager = LogManager.getLogManager();String cname = getClass().getName();pattern = manager.getStringProperty(cname + ".pattern", "%h/java%u.log");limit = manager.getIntProperty(cname + ".limit", 0);if (limit < 0) {    limit = 0;}        count = manager.getIntProperty(cname + ".count", 1);if (count <= 0) {    count = 1;}        append = manager.getBooleanProperty(cname + ".append", false);setLevel(manager.getLevelProperty(cname + ".level", Level.ALL));setFilter(manager.getFilterProperty(cname + ".filter", null));setFormatter(manager.getFormatterProperty(cname + ".formatter",new XMLFormatter()));try {    setEncoding(manager.getStringProperty(cname +".encoding", null));} catch (Exception ex) {    try {        setEncoding(null);    } catch (Exception ex2) {// doing a setEncoding with null should always work.// assert false;    }}    }

其中這行 說明預設不會追加log資料的

   append = manager.getBooleanProperty(cname + ".append", false);

所以需要在logging.properties下配置一下

java.util.logging.FileHandler.append = true 

到此問題解決

2： 注意logger.properties檔案中有這麼一句, 也就是說基本上不可以通過設定檔配置自訂Handler了

 These handlers will be installed during VM startup.
# Note that these classes must be on the system classpath.

# "handlers" specifies a comma separated list of log Handler # classes.  These handlers will be installed during VM startup.# Note that these classes must be on the system classpath.# By default we only configure a ConsoleHandler, which will only# show messages at the INFO and above levels.handlers= java.util.logging.ConsoleHandler, java.util.logging.FileHandler