The java.util.HttpServletRequest.getParameterValues() method is a part of the Java Servlet API. It is used to retrieve multiple parameter values from a request, when there are multiple parameter values with the same name. This method returns an array of string values associated with a specified parameter name, or null if the parameter does not exist. It is commonly used in web applications to process form submissions that contain multiple values for the same parameter key, such as checkboxes or multi-select dropdowns.
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