import java.util.*;
class Person implements Comparable<Person>
{
private String name;
private int age;
Person(String name,int age)
{
  this.name=name;
  this.age=age;
}
public String getName()
{
return name;
}
public int getAge()
{
return age;
}
public int hashCode()
{
return name.hashCode()+age*23;
}
public boolean equals(Object obj)
{
if(!(obj instanceof Person))
  throw new ClassCastException("类型错误");
Person p=(Person)obj;
return this.name.equals(p.name)&&this.age==p.age;
}
public int compareTo(Person p)
{
int num=new Integer(this.age).compareTo(new Integer(p.age));
if(num==0)
  return this.name.compareTo(p.name);

return num;  
}
    public String toString()
{
return name+".."+age;
}
}
class Maptest
{
public static void main(String[] args)
{
  HashMap<Person,String> hm=new HashMap<Person,String>();
  hm.put(new Person("lsi1",35),"beijin");
  hm.put(new Person("lsi2",34),"sichuan");
  hm.put(new Person("lsi3",33),"gauangz");
  hm.put(new Person("lsi4",32),"tianjing");
  hm.put(new Person("lsi5",38),"jiling");
  hm.put(new Person("lsi5",38),"jiling");
  hm.put(new Person("lsi6",64),"cahgcun");
  //第一种取值方式Keyset
  Set<Person> set=hm.keySet();//从hm中取出所有的键
  for (Iterator<Person> it=set.iterator();it.hasNext() ; )
  {
   Person p=it.next();//从it中获取键
   String val=hm.get(p);
   System.out.println(p+"----"+val);
  }
  
  System.out.println("========");
  //第二中取值方式
  Set<Map.Entry<Person,String>> setmap=hm.entrySet();//获取映射中的映射关系
  for (Iterator<Map.Entry<Person,String>> it=setmap.iterator();it.hasNext() ; )
  {
   Map.Entry<Person,String> map=it.next();
   Person p=map.getKey();
   String addr=map.getValue();
   System.out.println(p+"---"+addr);
  }

}
}

取出来后用高级for更简单！！可以尝试下！！