paramutils.java

来自「Jive Forums 1.0 src」· Java 代码 · 共 100 行

/**
 *  Parameter.java
 */

package com.coolservlets.forum.util;

import javax.servlet.http.*;

public class ParamUtils {

	public static String getParameter( HttpServletRequest request, String paramName ) {
		String temp = request.getParameter(paramName);
		if( temp != null && !temp.equals("") ) {
			return temp;
		} else {
			return null;
		}
	}

	public static String getParameter( HttpServletRequest request, String paramName, boolean emptyStringsOK ) {
		String temp = request.getParameter(paramName);
        if( emptyStringsOK ) {
            if( temp != null ) {
                return temp;
            } else {
                return null;
            }
        }
        else {
            return getParameter( request, paramName );
        }
	}
    
	public static boolean getBooleanParameter( HttpServletRequest request, String paramName ) {
		String temp = request.getParameter(paramName);
		if( temp != null && temp.equals("true") ) {
			return true;
		} else {
			return false;
		}
	}   
    
	public static int getIntParameter( HttpServletRequest request, String paramName, int defaultNum ) {
		String temp = request.getParameter(paramName);
		if( temp != null && !temp.equals("") ) {
            int num = defaultNum;
            try {
                num = Integer.parseInt(temp);
            }
            catch( Exception ignored ) {}
			return num;
		} else {
			return defaultNum;
		}
	}

    public static boolean getCheckboxParameter( HttpServletRequest request, String paramName ) {
        String temp = request.getParameter(paramName);
        if( temp != null && temp.equals("on") ) {
            return true;
        } else {
            return false;
        }
    }

	public static String getAttribute( HttpServletRequest request, String attribName ) {
		String temp = (String)request.getAttribute(attribName);
		if( temp != null && !temp.equals("") ) {
			return temp;
		} else {
			return null;
		}
	}
    
	public static boolean getBooleanAttribute( HttpServletRequest request, String attribName ) {
		String temp = (String)request.getAttribute(attribName);
		if( temp != null && temp.equals("true") ) {
			return true;
		} else {
			return false;
		}
	}   
    
	public static int getIntAttribute( HttpServletRequest request, String attribName, int defaultNum ) {
		String temp = (String)request.getAttribute(attribName);
		if( temp != null && !temp.equals("") ) {
            int num = defaultNum;
            try {
                num = Integer.parseInt(temp);
            }
            catch( Exception ignored ) {}
			return num;
		} else {
			return defaultNum;
		}
	}

}