An error occurred while retrieving object attributes in El.

 

The specific process is described as follows:

On the JSP page, use <%> to define a non-public class. Define the get and set methods for the two attributes. Instantiate the object in the code segment and put the object in the request domain.

Then, you can use the El expression on the page to obtain the private attributes of the object through the object name. attribute name. However, the above exception occurs during execution.

Cause:

The class defined on the JSP page is non-public. The El expression obtains the object's private property by means of reflection, and then upper-case the first character of the property and concatenates get to obtain the property. Then, the private property is obtained by calling this method. However, public get methods in non-public classes cannot be accessed by the outside world. Therefore, the corresponding attribute value cannot be obtained.

An error occurred while retrieving object attributes in El.