通过流的方式获取Request中的参数

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.beanutils.BeanUtils;

/**
 * requst流对象工具类
 * @author LUSHUIFA242
 *
 */
public class RequestStreamUtil {
	
	/**
	 * 将request流中的数据转换成String
	 * @param request
	 * @return
	 */
      public static String toString(HttpServletRequest request){
		    String valueStr = "";
		    try {
				StringBuffer sb = new StringBuffer();
				InputStream is = request.getInputStream();
				InputStreamReader isr = new InputStreamReader(is);
				BufferedReader br = new BufferedReader(isr);
				String s = "";
				while ((s = br.readLine()) != null) {
					sb.append(s);
				}
				valueStr = sb.toString();
			} catch (IOException e) {
				e.printStackTrace();
				valueStr = "";
			}
			return valueStr;
      }
      
	   /**
	  	 * 将request流中的数据转换成Map
	  	 * @param request
	  	 * @return
	  	 */
	    public static Map toMap(HttpServletRequest request){
	    	Map parameter = new HashMap();
	    	String valueStr = toString(request);
	    	try {
	    		if(null!=valueStr&&!"".equals(valueStr)){
			    	String[] valueArr = valueStr.split("&");
			    	for (String kvStr : valueArr) {
			    		String[] kvStrArr = kvStr.split("=");
			    		parameter.put(kvStrArr[0], kvStrArr[1]);
					}
			    }else{
			    	parameter = getParameterMap(request);
			    }
			} catch (Exception e) {
				e.printStackTrace();
			}
			return parameter;
	    }
	    
	    /**
	  	 * 将request流中的数据转换成bean
	  	 * @param request
	  	 * @return
	  	 */
	    public static Object toBean(HttpServletRequest request,Class beanClazz){
	    	Map mapObject = toMap(request);
	    	System.out.println("toBean:"+mapObject);
	    	Object beanO = null;
	    	try {
	    		beanO = beanClazz.newInstance();
	    		if(null!=mapObject&&!mapObject.isEmpty()){
	    			BeanUtils.copyProperties(beanO,mapObject);
	    		}
			} catch (Exception e) {
				e.printStackTrace();
			}
			return beanO;
	    }
	    
	    /** 
		 * 从request中获得参数Map，并返回可读的Map 
		 * @param request 
		 * @return 
		 */
		public static Map getParameterMap(HttpServletRequest request) {  
		    // 参数Map  
		    Map properties = request.getParameterMap();  
		    // 返回值Map  
		    Map returnMap = new HashMap();  
		    Iterator entries = properties.entrySet().iterator();  
		    Map.Entry entry;  
		    String name = "";  
		    String value = "";  
		    while (entries.hasNext()) {  
		        entry = (Map.Entry) entries.next();  
		        name = (String) entry.getKey();  
		        Object valueObj = entry.getValue();  
		        if(null == valueObj){  
		            value = "";  
		        }else if(valueObj instanceof String[]){  
		            String[] values = (String[])valueObj;  
		            for(int i=0;i