Get int-type parameter from Servlet. - Java Servlet JSP

Java examples for Servlet JSP:Servlet

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Description

Get int-type parameter from Servlet.

Demo Code


import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Main{
    /**//from   ww w . j a  v  a  2 s .  c o  m
     * Get int-type parameter. If parameter is not exist, or cannot be converted 
     * to int, default value is return.
     * 
     * @param name Parameter name.
     * @param defaultValue Default int value.
     * @return int value of specified parameter.
     */
    public static int getIntParameter(String name, int defaultValue) {
        String value = getStringParameter(name);
        try {
            return Integer.parseInt(value);
        } catch (NumberFormatException e) {
            return defaultValue;
        }
    }
    /**
     * Get parameter value as String. If parameter is not exist, return null.
     * 
     * @param name Parameter name.
     * @return String value, or null if no such parameter.
     */
    public static String getStringParameter(String name) {
        return getStringParameter(name, null);
    }
    /**
     * Get parameter value as String. If parameter is not exist, return default value.
     * 
     * @param name Parameter name.
     * @param defaultValue Default String value.
     * @return String value.
     */
    public static String getStringParameter(String name, String defaultValue) {
        HttpServletRequest request = ActionContext.getActionContext()
                .getHttpServletRequest();
        String value = request.getParameter(name);
        return value == null ? defaultValue : value;
    }
}

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