浅谈java中定义泛型类和定义泛型方法的写法

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1、方法中的泛型

public static T backSerializable(Class 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; }

2、定义泛型类

public class PageHibernateCallback implements HibernateCallback>{ 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 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

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