Java反射学习-5

通过反射方式复制对象：

package cn.tx.reflect;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;

/**
 * 反射复制对象
 * @author Administrator
 *
 */
public class ReflectLearn5 {

    public static void main(String[] args) throws Exception {
        Person p = new Person(3,"jack","america");
        Object obj = copyOjbect(p);
        System.out.println(obj);
    }
    
    public static Object copyOjbect(Object obj) throws Exception{
        //获得传递过来的对象的属性和构造器
        Class<? extends Object> class1 = obj.getClass();
        Field[] fields = class1.getDeclaredFields();
        Constructor constructor = class1.getConstructor();
        Object instance = constructor.newInstance(null);
        for (Field f : fields) {
            //获得属性名字
            String name = f.getName();
            //获得属性类型
            Class<?> type = f.getType();
            //获得属性对应的set方法
            String setMethodName = "set"+ name.substring(0,1).toUpperCase()+name.substring(1);
            String getMethodName = "get"+ name.substring(0,1).toUpperCase()+name.substring(1);
            //获得get方法
            Method gmethod = class1.getDeclaredMethod(getMethodName, null);
            //调用get方法获得被复制对象的一个属性值
            Object gresult = gmethod.invoke(obj, null);
            //get方法的参数类型是string,返回值类型也是
            Method smethod = class1.getDeclaredMethod(setMethodName,type);
//            Method smethod = class1.getDeclaredMethod(setMethodName,gmethod.getReturnType());
            smethod.invoke(instance, gresult);
            
        }
        return instance;
    }
}

结果：