Java acquisition server system default encoding format

Big brother to teach, to be a note 

// Spring Management acquired requets.attributes 
ServletRequestAttributes attrs = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes (); 
IF (attrs == null) { 
    // the throw new new IllegalStateException ( "does not exist in the current thread context Request "); 
} the else { 
    // sources 
    the Properties System.getProperties = Properties (); 
    // Get real entry path ( '... / the webapps' + '/images/testLog.txt') 
    String logRealPath = attrs. . getRequest () GetServletContext () the getRealPath ( "/ Images / testLog.txt");. 
    // open stream 
    the OutputStream new new OUT = a FileOutputStream (logRealPath, to true); 
    // get system information 
    Set <Map.Entry <Object, Object = entries It properties.entrySet >> (); 
    // print to file them 
    for (Map.Entry entry:entries
         ) { 
        Out.write (entry.getKey () toString () the getBytes ( "UTF-. 8"));.. 
        Out.write ( "->" the getBytes ( "UTF-. 8.")); 
        Out.write ( . entry.getValue () toString () the getBytes ( "UTF-. 8"));. 
        out.write ( "\ n-" .getBytes ( "UTF-. 8")); 
    } 

    // close the flow 
    the out.close (); 
} 

// browser and enter the project path /images/testLog.txt view 
to find "file.encoding"