Extjs 怎么获取hashmap?

通过javabean的方式可以获取,haspmap的时候不行.extjs:
var typeStore = new Ext.data.Store({
autoLoad :true,
reader: new Ext.data.XmlReader({
totalRecords: "results",
record: "BookType",  //haspmap的时候 怎么写? record: "map" 获取不了..
id: "id"
},
Ext.data.Record.create([
{name: 'id'},
{name: 'title'},
{name: 'detail'}
])
),
proxy : new Ext.data.HttpProxy({
url : 'test.do?method=getBookTypeList'
})
})
javabean方式:BookType bookType = new BookType();
bookType.setId(001);
bookType.setTitle("散文集");
bookType.setDetail("鲁迅");
list.add(bookType);解析的xml:<?xml version="1.0" encoding="GBK"?>
<list>
  <Total>
    <results>1</results>
  </Total>
  <BookType>
    <id>1</id>
    <title>散文集</title>
    <detail>鲁迅的书</detail>
  </BookType>
</list>现在要用haspmap方式haspmap方式:
Map map=new HashMap();
map.put("id","001");
map.put("title","散文集");
map.put("detail","鲁迅");
list.add(map);解析的xml:<?xml version="1.0" encoding="GB
<list>
  <Total>
    <results>1</results>
  </Total>
  <map>
    <entry>
      <string>title</string>
      <string>散文集</string>
    </entry>
    <entry>
      <string>detail</string>
      <string>鲁迅</string>
    </entry>
    <entry>
      <string>id</string>
      <string>001</string>
    </entry>
  </map>
</list>