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## org.apache.log4j
Class HTMLLayout

    java.lang.Object
      org.apache.log4j.Layout
          org.apache.log4j.HTMLLayout

All Implemented Interfaces:
  OptionHandler

    public class HTMLLayout

extends Layout

This layout outputs events in a HTML table. Appenders using this layout should have their encoding set to UTF-8 or UTF-16, otherwise events containing non ASCII characters could result in corrupted log files.

Author:
  Ceki Gülcü

Field Summary
`protected int` | `BUF_SIZE`
`static String` | `LOCATION_INFO_OPTION` Deprecated. Options are now handled using the JavaBeans paradigm. This constant is not longer needed and will be removed in the near term.
`protected int` | `MAX_CAPACITY`
`static String` | `TITLE_OPTION` A string constant used in naming the option for setting the the HTML document title.

Fields inherited from class org.apache.log4j.Layout
`LINE_SEP, LINE_SEP_LEN`

Constructor Summary
`HTMLLayout()`

Method Summary
`void` | `activateOptions()` No options to activate.
`String` | `format(LoggingEvent event)` Implement this method to create your own layout format.
`String` | `getContentType()` Returns the content type output by this layout, i.e "text/html".
`String` | `getFooter()` Returns the appropriate HTML footers.
`String` | `getHeader()` Returns appropriate HTML headers.
`boolean` | `getLocationInfo()` Returns the current value of the LocationInfo option.
`String` | `getTitle()` Returns the current value of the Title option.
`boolean` | `ignoresThrowable()` The HTML layout handles the throwable contained in logging events.
`void` | `setLocationInfo(boolean flag)` The LocationInfo option takes a boolean value.
`void` | `setTitle(String title)` The Title option takes a String value.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### BUF_SIZE

    protected final int BUF_SIZE

See Also:
  Constant Field Values

### MAX_CAPACITY

    protected final int MAX_CAPACITY

See Also:
  Constant Field Values

### LOCATION_INFO_OPTION

    public static final String LOCATION_INFO_OPTION

  Deprecated. Options are now handled using the JavaBeans paradigm. This constant is not longer needed and will be removed in the near term.
  A string constant used in naming the option for setting the the location information flag. Current value of this string constant is LocationInfo.

  Note that all option keys are case sensitive.

  See Also:
    Constant Field Values

### TITLE_OPTION

    public static final String TITLE_OPTION

  A string constant used in naming the option for setting the the HTML document title. Current value of this string constant is Title.

  See Also:
    Constant Field Values

Constructor Detail

### HTMLLayout

    public HTMLLayout()

Method Detail

### setLocationInfo

    public void setLocationInfo(boolean flag)

  The LocationInfo option takes a boolean value. By default, it is set to false which means there will be no location information output by this layout. If the the option is set to true, then the file name and line number of the statement at the origin of the log statement will be output.

  If you are embedding this layout within an `SMTPAppender` then make sure to set the LocationInfo option of that appender as well.

### getLocationInfo

    public boolean getLocationInfo()

  Returns the current value of the LocationInfo option.

### setTitle

    public void setTitle(String title)

  The Title option takes a String value. This option sets the document title of the generated HTML document.

  Defaults to 'Log4J Log Messages'.

### getTitle

    public String getTitle()

  Returns the current value of the Title option.

### getContentType

    public String getContentType()

  Returns the content type output by this layout, i.e "text/html".

  Overrides:
    `getContentType` in class `Layout`

### activateOptions

    public void activateOptions()

  No options to activate.

### format

    public String format(LoggingEvent event)

  Description copied from class: `Layout`
  Implement this method to create your own layout format.

  Specified by:
    `format` in class `Layout`

### getHeader

    public String getHeader()

  Returns appropriate HTML headers.

  Overrides:
    `getHeader` in class `Layout`

### getFooter

    public String getFooter()

  Returns the appropriate HTML footers.

  Overrides:
    `getFooter` in class `Layout`

### ignoresThrowable

    public boolean ignoresThrowable()

  The HTML layout handles the throwable contained in logging events. Hence, this method return `false`.

  Specified by:
    `ignoresThrowable` in class `Layout`

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