浅谈java中定义泛型类和定义泛型方法的写法

public static <T> T backSerializable(Class<T> clazz , String path ,String fileName){  FileInputStream fis = null; ObjectInputStream ois = null; Object obj = null;  try {    fis = new FileInputStream(path + fileName);  ois = new ObjectInputStream(fis);  obj = ois.readObject();   } catch (FileNotFoundException e) {  // TODO Auto-generated catch block  e.printStackTrace(); } catch (ClassNotFoundException e) {  // TODO Auto-generated catch block  e.printStackTrace(); } catch (IOException e) {  // TODO Auto-generated catch block  e.printStackTrace(); }finally{    try {  if( fis!=null) fis.close();  if( ois!=null) ois.close();  } catch (IOException e) {  // TODO Auto-generated catch block  e.printStackTrace();  }     }    return (T)obj; }

public class PageHibernateCallback<T> implements HibernateCallback<List<T>>{  private String hql; private Object[] params; private int startIndex; private int pageSize;  public PageHibernateCallback(String hql, Object[] params,  int startIndex, int pageSize) { super(); this.hql = hql; this.params = params; this.startIndex = startIndex; this.pageSize = pageSize; } public List<T> doInHibernate(Session session) throws HibernateException,  SQLException { //1 执行hql语句 Query query = session.createQuery(hql); //2 实际参数 if(params != null){  for(int i = 0 ; i < params.length ; i ++){  query.setParameter(i, params[i]);  } } //3 分页 query.setFirstResult(startIndex); query.setMaxResults(pageSize);  return query.list(); }}