Java反射小案例(一)

如题：一个实体类，实例化两个对象A和B，将A对象属性赋值。 通过反射的技术将A对象的属性值赋给B对象（同一个类，不同对象相同属性赋值）

//		实例化两个对象A和B
		Student stuA=new Student(1,"赵柳","女","18","湖北武汉","2018-12-1");
		Student stuB=new Student();
		
//		获取Student  B类对象
		Class clazz = stuB.getClass();
		
//		获取Student类 所有属性
		Field[] declaredFields = clazz.getDeclaredFields();
		for (Field field : declaredFields) {
//			打破封装(私有属性)
			field.setAccessible(true);
//			使用set方法赋值，参数一：需赋值的对象，参数二：获取值的对象
			field.set(stuB, field.get(stuA));
		}
		System.out.println(stuB);
	}

Student类

package com.simple.regflectOne;

public class Student {
	private int studentId;
	private String studentName;
	private String studentGender;
	private String studentAge;
	private String adress;
	private String birthDay;

	public int getStudentId() {
		return studentId;
	}

	public void setStudentId(int studentId) {
		this.studentId = studentId;
	}

	public String getStudentName() {
		return studentName;
	}

	public void setStudentName(String studentName) {
		this.studentName = studentName;
	}

	public String getStudentGender() {
		return studentGender;
	}

	public void setStudentGender(String studentGender) {
		this.studentGender = studentGender;
	}

	public String getStudentAge() {
		return studentAge;
	}

	public void setStudentAge(String studentAge) {
		this.studentAge = studentAge;
	}

	public String getAdress() {
		return adress;
	}

	public void setAdress(String adress) {
		this.adress = adress;
	}

	public String getBirthDay() {
		return birthDay;
	}

	public void setBirthDay(String birthDay) {
		this.birthDay = birthDay;
	}

	public Student(int studentId, String studentName, String studentGender,
			String studentAge, String adress, String birthDay) {
		super();
		this.studentId = studentId;
		this.studentName = studentName;
		this.studentGender = studentGender;
		this.studentAge = studentAge;
		this.adress = adress;
		this.birthDay = birthDay;
	}

	public Student() {
		super();
	}

	@Override
	public String toString() {
		return "Student [studentId=" + studentId + ", studentName="
				+ studentName + ", studentGender=" + studentGender
				+ ", studentAge=" + studentAge + ", adress=" + adress
				+ ", birthDay=" + birthDay + "]";
	}

}

Java反射小案例(二)

如题： 两个不同实体类，实例化两个对象A和B，将A对象属性赋值。 通过反射的技术将A对象的属性值赋给B对象中相同的属性（不同类，相同属性赋值）

package RegflectOne;

import java.lang.reflect.Field;

public class TestTwo {

	public static void main(String[] args) throws IllegalArgumentException,
			IllegalAccessException {
		// 实例化两个对象A和B
		Student stuA = new Student(1, "王武", "男", "18", "湖北武汉", "2018-12-1");
		Teacher teaB = new Teacher();

		// 获取类对象
		Class stu = Student.class;
		Class tea = Teacher.class;

		// 获取类类中属性
		Field[] declaredFieldsStu = stu.getDeclaredFields();
		Field[] declaredFieldsTea = tea.getDeclaredFields();

		for (Field fieldStu : declaredFieldsStu) {
			for (Field fieldTea : declaredFieldsTea) {
				// 打破封装
				fieldStu.setAccessible(true);
				fieldTea.setAccessible(true);
				//判断给相同的属性赋值
				if (fieldStu.getName().equals(fieldTea.getName())) {
					fieldTea.set(teaB, fieldStu.get(stuA));
				}
			}
		}
		 System.out.println(teaB);
	}
}

Student类

package RegflectOne;

public class Student {
	private int studentId;
	private String studentName;
	private String studentGender;
	private String studentAge;
	private String adress;
	private String birthDay;

	public int getStudentId() {
		return studentId;
	}

	public void setStudentId(int studentId) {
		this.studentId = studentId;
	}

	public String getStudentName() {
		return studentName;
	}

	public void setStudentName(String studentName) {
		this.studentName = studentName;
	}

	public String getStudentGender() {
		return studentGender;
	}

	public void setStudentGender(String studentGender) {
		this.studentGender = studentGender;
	}

	public String getStudentAge() {
		return studentAge;
	}

	public void setStudentAge(String studentAge) {
		this.studentAge = studentAge;
	}

	public String getAdress() {
		return adress;
	}

	public void setAdress(String adress) {
		this.adress = adress;
	}

	public String getBirthDay() {
		return birthDay;
	}

	public void setBirthDay(String birthDay) {
		this.birthDay = birthDay;
	}

	public Student(int studentId, String studentName, String studentGender,
			String studentAge, String adress, String birthDay) {
		super();
		this.studentId = studentId;
		this.studentName = studentName;
		this.studentGender = studentGender;
		this.studentAge = studentAge;
		this.adress = adress;
		this.birthDay = birthDay;
	}

	public Student() {
		super();
	}

	@Override
	public String toString() {
		return "Student [studentId=" + studentId + ", studentName="
				+ studentName + ", studentGender=" + studentGender
				+ ", studentAge=" + studentAge + ", adress=" + adress
				+ ", birthDay=" + birthDay + "]";
	}

}

Teacher类

package RegflectOne;

public class Teacher {
	private int teacherId;
	public String studentName;
	public String studentGender;
	
	public int getTeacherId() {
		return teacherId;
	}

	public void setTeacherId(int teacherId) {
		this.teacherId = teacherId;
	}

	public String getStudentName() {
		return studentName;
	}

	public void setStudentName(String studentName) {
		this.studentName = studentName;
	}

	public String getStudentGender() {
		return studentGender;
	}

	public void setStudentGender(String studentGender) {
		this.studentGender = studentGender;
	}

	public Teacher(int teacherId, String studentName, String studentGender) {
		super();
		this.teacherId = teacherId;
		this.studentName = studentName;
		this.studentGender = studentGender;
	}

	public Teacher() {
		super();
	}

	@Override
	public String toString() {
		return "Teacher [teacherId=" + teacherId + ", studentName="
				+ studentName + ", studentGender=" + studentGender + "]";
	}
	
	
}