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PageData.java
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125 lines (103 loc) · 2.78 KB
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import javax.servlet.http.HttpServletRequest;
import java.util.*;
/**
* DateTime: 2016/9/20 19:16
* 功能：
* 封装的Map
* 比如表单中新增的用户名 <input name=”username” value=”张三”>
* 后台pd = this.getPageData();后，pd里面就有username的值了
* 思路：
*/
public class PageData extends HashMap implements Map {
//测试
public static void main(String[] args) {
}
private static final long serialVersionUID=1L;
Map map=null;
HttpServletRequest request;
public PageData(HttpServletRequest request){
this.request=request;
Map properties=request.getParameterMap();
Map returnMap=new HashMap();
Iterator entries=properties.entrySet().iterator();
Entry entry;
String name="";
String value="";
while ( entries.hasNext() ){
entry=(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();
}
returnMap.put(name,value);
}
map=returnMap;
}
public PageData(){
map=new HashMap();
}
@Override
public 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")
@Override
public Object put(Object key,Object value){
return map.put(key,value);
}
@Override
public Object remove(Object key){
return map.remove(key);
}
@Override
public void clear() {
map.clear();
}
@Override
public boolean containsKey(Object key) {
return map.containsKey(key);
}
@Override
public Set keySet() {
return map.keySet();
}
@Override
public Set entrySet() {
return map.entrySet();
}
@Override
public boolean isEmpty() {
return map.isEmpty();
}
@Override
public void putAll(Map m) {
map.putAll(m);
}
@Override
public int size() {
return map.size();
}
@Override
public Collection values() {
return map.values();
}
}