java反射中Method类invoke方法的用法

package com.zsw.test;

import java.lang.reflect.Method;

import java.lang.reflect.InvocationTargetException;

/**

 * <p>Title: java反射中Method类invoke方法的用法</p> *

 * <p>Description: </p> *

 * <p>Copyright: Copyright (c) 2009</p> *

 * <p>Company: 嘉盈公司</p> *

 * @author zsw

 * @version 1.0

 */

public class InvokeTester {

    

    private String name;

    

    public void setName(String name){

        this.name = name;

    }    

    public String getName(){

        return name;

    }    

    

    public InvokeTester() {

    }

    public int add(int param1, int param2) {

        return param1 + param2;

    }

    public String echo(String mesg) {

        return "echo" + mesg;

    }

    public static void main(String[] args) {

        Class classType = InvokeTester.class;

        try {

            Object invokertester = classType.newInstance();   //1

            Method addMethod = classType.getMethod("add", new Class[] {  //2

                    int.class, int.class

            });

            Object result = addMethod.invoke(invokertester, new Object[] {        //3

                                             new Integer(100), new Integer(200)

            });

            System.out.println(result);

            //////////////////////

            Method echo = classType.getMethod("echo", new Class[] {String.class});

            Object obj = echo.invoke(invokertester,

                                     new Object[] {new String("jy is very good!!!")});

            System.out.println(obj.toString());

            

            ////////////////////

            InvokeTester test = new InvokeTester();   //1

            test.setName("黄翊");                      //2

            

            //Method[] methods;

            Method[] methods = test.getClass().getDeclaredMethods();  //3

            

            //循环查找获取id方法，并执行查看是否有返回值

                for (int i = 0; i < methods.length; i++) {

                    

                        //如果此方法有get和Id关键字则执行

                        if (methods[i].getName().indexOf("get") != -1 && methods[i].getName().indexOf("Name") != -1) {

                                try{

                                        // 获取此get方法返回值,判断是否有值,如果没有值说明即将执行的操作新增

                                        if (methods[i].invoke(test, null) == null) {  //4                                            

                                            System.out.println("此对象没有值！！！");                             

                                        } else {

                                               Object strName =  methods[i].invoke(test, null);

                                               System.out.println(strName);

                                        }

                                }catch(Exception e){

                                        System.out.print("");

                                }

                        }

                }

        } catch (IllegalAccessException ex) {

        } catch (InstantiationException ex) {

        } catch (SecurityException ex) {

        } catch (NoSuchMethodException ex) {

        } catch (InvocationTargetException ex) {

        } catch (IllegalArgumentException ex) {

        }

    }

}