泛型方法+反射，解决静态可变类参数问题

来源：互联网发布：游戏源码怎么看编辑：程序博客网时间：2024/04/28 05:16

问题描述：略

问题分析：略

具体代码如下：

Base是Lesson和Result的基类

public class Base {public static Base parse(String str) {return new Base();}}

Lesson

public class Lesson extends Base{public static Lesson parse(String str){return new Lesson();}}

Result

public class Result extends Base {public static Result parse(String str) {return new Result();}}

BaseList是LessonList和ResultList的基类

public class BaseList {    public static <BaseListT, BaseT> BaseListT parse(String str,            Class<BaseListT> listClass, Class<BaseT> itemClass)    throws SecurityException, NoSuchMethodException, IllegalArgumentException,            IllegalAccessException, InvocationTargetException,            InstantiationException {                BaseListT baseList = (BaseListT) listClass.newInstance();        List<BaseT> list = new ArrayList<BaseT>();        Method method = itemClass.getMethod("parse",                new Class[] { String.class });        for (int i = 0; i < 10; i++) {            BaseT base = (BaseT) method.invoke(itemClass, str);            System.out.println(base.getClass().getName());            list.add(base);        }        System.out.println(baseList.getClass().getName());        return baseList;    }}

LessonList

public class LessonList extends BaseList {public static LessonList parse(String str) throws SecurityException,IllegalArgumentException, NoSuchMethodException,IllegalAccessException, InvocationTargetException, InstantiationException {return  (LessonList) BaseList.parse(str, LessonList.class,Lesson.class);}}

ResultList

public class ResultList extends BaseList {public static ResultList parse(String str) throws SecurityException,IllegalArgumentException, NoSuchMethodException,IllegalAccessException, InvocationTargetException, InstantiationException {return (ResultList) BaseList.parse(str, ResultList.class,Result.class);}}

Test类测试类

public class Test {public static void main(String args[]) throws SecurityException,IllegalArgumentException, NoSuchMethodException,IllegalAccessException, InvocationTargetException,InstantiationException {LessonList.parse("dfd");ResultList.parse("dfd");}}