Adding Messages to JSPs

Displaying Messages and Errors
Step 3 of 3

Any messages the user should see are now stored in either SessionMessages or SessionErrors. Next, you’ll make these messages appear in your JSPs.

1. In the guestbook-web module, open guestbookwebportlet/view.jsp. Add the following block of success messages to the top of the file, just below the init.jsp include statement:

   <liferay-ui:success key="entryAdded" message="entry-added" />
   <liferay-ui:success key="guestbookAdded" message="guestbook-added" />
   <liferay-ui:success key="entryDeleted" message="entry-deleted" />
   

   This tag accesses what’s stored in SessionMessages. It has two attributes. The first is the SessionMessages key that you provided in the GuestbookPortlet.java class’s add and delete methods. The second looks up the specified key in the Language.properties file. You could have specified a hard-coded message here, but it’s far better to provide a localized key.

2. Now open guestbookadminportlet/view.jsp. Add the following block of success messages in the same spot below the include:

   <liferay-ui:success key="guestbookAdded" message="guestbook-added" />
   <liferay-ui:success key="guestbookUpdated" message="guestbook-updated" />
   <liferay-ui:success key="guestbookDeleted" message="guestbook-deleted" />
   

   Note that one of the message values is the same for both portlets. There’s no need to write redundant messages–language keys are reusable.

Figure 1: Now the message will display the value you specified in `Language.properties`.

Congratulations! You’ve added useful feedback for operations in your application. Next, you’ll add permission checking for your guestbooks and entries.