Read external configuration file information in struts

1, in Tomcat in the WebApps directory to place a config.properties configuration file;

2, in the listening time read write to the SRC directory;

3, through the properties class again read, can be obtained at the service layer, the specific code is as follows:

1, listening class, implement Servletcontextlistener interface

public class Initjdbclistener implements Servletcontextlistener {

Private static final Logger log = Logger.getlogger (Initjdbclistener.class);

public void contextinitialized (Servletcontextevent event) {

ServletContext context = Event.getservletcontext ();

AUTOSETUPJDBC (context);

Loadjdbcproperties (context);

Load project configuration file

Loadconfigproperties (context);

At this point, the Context-param element in Web. XML has been loaded into the ServletContext object.

Setwpsflag (context);

Setjdbckeys (context);

}

private void Loadconfigproperties (ServletContext SC) {

Log.info ("Load project configuration file");

File newmsgproperties = Getnewmsgpropertiesfile (SC);

File oldmsgproperties = Getoldmsgpropertiesfile (SC);

try {

Setmsgproperties (Oldmsgproperties, newmsgproperties);

} catch (IOException e) {

TODO auto-generated Catch block

E.printstacktrace ();

}

}

private void Setmsgproperties (File oldmsgproperties,file newmsgproperties) throws ioexception{

if (newmsgproperties! = NULL && oldmsgproperties! = null) {

FileInputStream fis = new FileInputStream (newmsgproperties);

FileOutputStream fos = new FileOutputStream (oldmsgproperties);

Byte[] bs = new byte[fis.available ()];

Fis.read (BS);

Fos.write (BS);

Fos.flush ();

Fis.close ();

Fos.close ();

}

}

Private File Getoldmsgpropertiesfile (ServletContext SC) {

String appdir = Sc.getrealpath (File.separatorchar + "");

String Msgpropertiespath = appdir + "Web-inf" + File.separatorchar

+ "Classes" + File.separatorchar + "config.properties";

File Msgfile = new file (Msgpropertiespath);

if (Msgfile.exists ())

return msgfile;

return null;

}

Private File Getnewmsgpropertiesfile (ServletContext SC) {

String appdir = Sc.getrealpath (File.separatorchar + "");

File Appdirfile = new file (appdir);

String Appcontainerpath = Appdirfile.getparent ();

String Msgpropertiespath = appcontainerpath + File.separatorchar + "CONFIG_GAGB" + File.separatorchar

+ "Config.properties";

File Msgfile = new file (Msgpropertiespath);

if (Msgfile.exists ())

return msgfile;

return null;

}

}

2, configure the monitoring in Web. XML, the code is as follows:

<!--must be placed before Contextloaderlistener--

<listener>

<listener-class>

Org.gagb.webapp.listener.InitJDBCListener

</listener-class>

</listener>

<listener>

<listener-class>

Org.springframework.web.context.ContextLoaderListener

</listener-class>

</listener>

3. Read the configuration file via properties:

/**

* Read configuration file

* Config.properties placed in src directory

* @return

*/

public static Properties Getconfigproperties () {

Properties prop = new properties ();

try {

Java.net.URL URL = CommonUtil.class.getResource ("/config.properties");

String Savepath = Url.getpath ();

The following method reads the properties file to cache the problem

InputStream in = Propertiesutils.class

. getResourceAsStream ("/config.properties");

InputStream in = new Bufferedinputstream (new FileInputStream (Savepath));

Prop.load (in);

} catch (Exception e) {

E.printstacktrace ();

return null;

}

return prop;

}

4. Add the properties static variable in serve:

private static Properties Pro = Commonutil.getconfigproperties ();

5, in the method according to key to get value:

String Adcode = Pro.getproperty (Constants.ad_code);

6. If <constant name= "struts.custom.i18n.resources" value= "Applicationresources,errors,jdbc,gis" is configured in Struts.xml, Axis,msg,config "/> can be obtained directly through GetText (" key ");

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Read external configuration file information in struts