Java反射练习(二)

这次在运行时使用反射分析对象

获取数据域的实际内容

package com.slliver.reflection;

import java.lang.reflect.Field;

/** * Created with IntelliJ IDEA. * User: Administrator * Date: 2017/4/13 0013 * Time: 下午 21:23 * To change this template use File | Settings | File Templates. */ public class StudentTest {

1public static void main(String\[\] args) {
2    Student student = new Student("stu20170413212400", "class001", "card001");
3    printFieldValue(student);
4}
5
6private static void printFieldValue(Student student){
7    Class classzz = student.getClass();
8    Field\[\] fields = classzz.getDeclaredFields();
9    try {
10        for(Field field : fields){
11            // 类中属性
12            String fieldName = field.getName();
13            Field property = classzz.getDeclaredField(fieldName);
14            // 如果属性的修饰符不是public,设置可访问权限
15            if(!property.isAccessible()){
16                // 设置访问访问权限
17                property.setAccessible(true);
18            }
19
20            Object fieldValue = property.get(student);
21            System.out.println("\[fileName == >" + fieldName + "\],\[" + "fieldValue == >" + fieldValue + "\]");
22        }
23
24    } catch (NoSuchFieldException e) {
25        e.printStackTrace();
26    } catch (IllegalAccessException e) {
27        e.printStackTrace();
28    }
29}

}