java获取request中参数

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
/**
 * @author xuxile
 * */
public class RequestUtil {
	/**
	 *  获取request中参数
	 * @param request 页面请求
	 */
	public static Map<String, Object> getRequestParameters(HttpServletRequest request) {
		 String parameters="";//请求参数
	        if("GET".equals(request.getMethod())){//GET请求时的参数
	        	String urlParameter=request.getQueryString();//网址中的参数
	 	        if(urlParameter!=null&&!"".equals(urlParameter)){
	 	        	try {
	 					urlParameter=URLDecoder.decode(urlParameter,"UTF-8");
	 				} catch (UnsupportedEncodingException e) {
	 					e.printStackTrace();
	 				}
	 	        }else {
	 	        	urlParameter="";
	 			}
	        	parameters=urlParameter;
	        }else if("POST".equals(request.getMethod())){//POST请求时的参数
	        	String totalParameter="";//表单及网址中全部参数
	            Map<String, String[]> params = request.getParameterMap();
	            int parametersNum=request.getParameterMap().size();//参数个数
	            int flag=1;
	            for (String key : params.keySet()) {  
	            	
	                String[] values = params.get(key);  
	                for (int i = 0; i < values.length; i++) {  
	                    String value = values[i]; 
	                    totalParameter+= key + "=" + value;
	                }
	                if(flag<parametersNum){
	                	totalParameter+="&";
	                }
	                flag+=1;
	            } 
	            parameters=totalParameter;
			}
	        Map<String, Object> map=new HashMap<String, Object>();
	        String[] arr=parameters.split("&");
	        for (int i = 0; i <arr.length; i++) {
				String key=arr[i].substring(0, arr[i].indexOf("="));
				String value=arr[i].substring( arr[i].indexOf("=")+1);
				map.put(key, value);
			}
	       return map;
	}
}