Manual steps to remove adding error message in jsf

July 04, 2020 by Henry Alderson

 

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Last week, some users came across a well-known error message regarding the addition of an error message in jsf. Several factors are behind this problem. Now let's discuss this. Using FacesContext, you can add messages that will be displayed with the tag of JSF action methods. getCurrentInstance (). API AddMessage (), which defines two parameters.

 

 



If an error occurs in the backend and you need to tell the user what happened, you can display the corresponding error message. JSF provides a simple utility for viewing these messages. You can display global messages with , or use messages related to properties with . This example shows how to add parameterized and localized messages using FacesMessage . We are also developing news with bootstrap warning classes.

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We work with the following dependencies. Note that we have included the dependency org.webjars.bootstrap . This library provides Javascript and special CSS bootstrap files for jsf.

Adding Messages Through A Managed Component

We create a special utility class called MessageUtils with the addErrorMessage method, which uses the error key to display the message and the parameters to which we want to pass the Format message. We define the locale usingUgogo class of utilities with the name JSFUtils . These utility classes are described later in this guide. Working with these utility classes makes it very easy to understand what is happening in the code.

Message Utility



The actual logic for adding an error message is contained in this MessageUtility class. We create a FacesMessage that we pass to the FacesMessage.SEVERITY_ERROR type, which identifies this message as an error message. Please note that we add this message to FacesContext using the addMessage method and do not provide the identifier of the client that makes this error message a global error.


how to add error message in jsf

Then we get the ResourceBundle and call getString to get the message packet key. Then we add the specified parameters to the MessageFormat class using the format method.

JSF Utility

News

Save The Messages In -aces-config.xml


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We need to save the message package in the features-config.xml file using the resource package element that obeys the application element. We add the base name, whichis the name of the package relative to the class path where we find the messages.properties file. We are also adding the variable previously used to get the resource bundle.

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We are adding a bootstrap CSS library specifically for JSF using . This style is used to extend our messages with bootstrap alert classes. Next, we save the element, which is a placeholder for our error messages. We define specific classes for which CSS class to use for what type of errors.

 

 

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