List、Set、Map、数组遍历应用举例

package com.yzy.hibernate.dao;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.hibernate.Session;

import com.yzy.hibernate.pojo.CollectionDemo;

public class RelationDao {

 public void add() {
  Session session = null;
  try {
   session = Factory.getSession();
   session.beginTransaction();
   CollectionDemo coll = new CollectionDemo();
   coll.setName("李大钊");
   Set set = new HashSet();
   set.add("语文");
   set.add("数学");
   set.add("物理");
   coll.setSet(set);

   Map map = new HashMap();
   map.put("fz", "福州");
   map.put("sz", "深圳");
   map.put("gz", "广州");
   coll.setMap(map);

   List list = new ArrayList();
   list.add("足球");
   list.add("篮球");
   list.add("排球");
   coll.setList(list);

   String[] strs = { "苹果", "梨", "桃子" };
   coll.setStrs(strs);

   session.save(coll);

   session.getTransaction().commit();
  } catch (Exception e) {
   session.getTransaction().rollback();
   e.printStackTrace();
  } finally {
   Factory.closeSession(session);
  }
 }

 public void sel() {
  Session session = null;
  try {
   session = Factory.getSession();
   CollectionDemo coll = (CollectionDemo) session.load(
     CollectionDemo.class, 1);
   System.out.println(coll.getName());
   System.out.println("所教的课程");
   Set set = coll.getSet();
   Iterator it = set.iterator();
   while (it.hasNext()) {
    System.out.println(it.next().toString());
   }
   System.out.println("住址:");
   Map map = coll.getMap();
   Set keySet = map.keySet();
   Iterator keyIt = keySet.iterator();
   while (keyIt.hasNext()) {
    System.out.println(map.get(keyIt.next().toString()));
   }
   System.out.println("运动:");
   List list = coll.getList();
   for (int i = 0; i < list.size(); i++) {
    System.out.println(list.get(i));
   }

   System.out.println("喜爱的水果");
   String[] strs = coll.getStrs();
   for (int i = 0; i < strs.length; i++) {
    System.out.println(strs[i]);
   }

  } catch (Exception e) {

   e.printStackTrace();
  } finally {
   Factory.closeSession(session);
  }

 }

}