Java万能接收页面数据，并自动匹配封装为map对象

package com.mwk.util;import java.io.UnsupportedEncodingException;import java.net.URLDecoder;import java.util.Collection;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Set;import javax.servlet.http.HttpServletRequest;public class PageData extends HashMap implements Map{private static final long serialVersionUID = 1L;Map map = null;HttpServletRequest request;public PageData(HttpServletRequest request){this.request = request;Map properties = request.getParameterMap();System.out.println("....."+properties);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<values.length;i++){ value = values[i] + ",";}value = value.substring(0, value.length()-1); }else{value = valueObj.toString(); }try {value = URLDecoder.decode(value, "utf-8");} catch (UnsupportedEncodingException e) {e.printStackTrace();}returnMap.put(name, value); }map = returnMap;}public PageData() {map = new HashMap();}@Overridepublic Object get(Object key) {Object obj = null;if(map.get(key) instanceof Object[]) {Object[] arr = (Object[])map.get(key);obj = request == null ? arr:(request.getParameter((String)key) == null ? arr:arr[0]);} else {obj = map.get(key);}return obj;}public String getString(Object key) {return (String)get(key);}@SuppressWarnings("unchecked")@Overridepublic Object put(Object key, Object value) {return map.put(key, value);}@Overridepublic Object remove(Object key) {return map.remove(key);}public void clear() {map.clear();}public boolean containsKey(Object key) {// TODO Auto-generated method stubreturn map.containsKey(key);}public boolean containsValue(Object value) {// TODO Auto-generated method stubreturn map.containsValue(value);}public Set entrySet() {// TODO Auto-generated method stubreturn map.entrySet();}public boolean isEmpty() {// TODO Auto-generated method stubreturn map.isEmpty();}public Set keySet() {// TODO Auto-generated method stubreturn map.keySet();}@SuppressWarnings("unchecked")public void putAll(Map t) {// TODO Auto-generated method stubmap.putAll(t);}public int size() {// TODO Auto-generated method stubreturn map.size();}public Collection values() {// TODO Auto-generated method stubreturn map.values();}}

结合springmvc可以不用建实体类，在传参与接参中可以自动匹配参数并封装

在mybatis中这样配置即可，怎样的好处慢慢发掘

<typeAliases><typeAlias type="com.mwk.util.PageData" alias="pd"/></typeAliases>