Class類中getDeclaredFields() 與getFields()的區別

getDeclaredFields()返回Class中所有的字段，包括私有字段，而getFields()只返回公有字段，即有public修飾的字段。

package com.shen.test.dto;

import java.lang.reflect.Field;

/**
 * <b>Description</b> 訂單領域對象 <BR>
 *
 * @author shenhaiwen
 *
 * @since 2017年7月18日下午2:27:58
 */
public class OrderDto {

    private String orderId;

    private String userId;

    private String amt;

    protected String mark;

    public String desc;

    String address;

    public String getOrderId() {
        return orderId;
    }

    public void setOrderId(String orderId) {
        this.orderId = orderId;
    }

    public String getUserId() {
        return userId;
    }

    public void setUserId(String userId) {
        this.userId = userId;
    }

    public String getAmt() {
        return amt;
    }

    public void setAmt(String amt) {
        this.amt = amt;
    }

    public String getMark() {
        return mark;
    }

    public void setMark(String mark) {
        this.mark = mark;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public static void main(String[] args) {
        System.out.println("=====begin run getDeclaredFields=====");
        Field[] declaredFields = OrderDto.class.getDeclaredFields();
        for (int i = 0; i < declaredFields.length; i++) {
            Field field = declaredFields[i];
            System.out.println(field);
        }
        System.out.println("=====end run getDeclaredFields=====");
        System.out.println("=====begin run getFields=====");
        Field[] fields = OrderDto.class.getFields();
        for (int i = 0; i < fields.length; i++) {
            Field field = fields[i];
            System.out.println(field);
        }
        System.out.println("=====end run getFields=====");
    }

}

打印輸出結果如下：