@Data
public class Student {
	/**
	 * 學(xué)生編號(hào)
	 */
	private String stNo;
	/**
	 * 學(xué)生姓名
	 */
	private String stName;
	/**
	 * 學(xué)生年齡
	 */
	private Integer age;
	/**
	 * 性別
	 */
	private String gender;

}

//判斷學(xué)生的姓名是否符合條件
if(Objects.nonNull(stu.getStName()) && stu.getStName().length() < 20) {
	//TODO ...對(duì)符合的數(shù)據(jù)進(jìn)行下一步的處理
}

//判斷學(xué)生的姓名是否符合條件
if(Objects.nonNull(stu.getStName()) && stu.getStName().length() < 20) {

	if(Objects.nonNull(stu.getStAge()) && stu.getStAge() > 0 && stu.getStAge() < 60) {
		//TODO ...對(duì)符合的數(shù)據(jù)進(jìn)行下一步的處理
	}
}

//判斷學(xué)生的姓名是否符合條件
if(Objects.nonNull(stu.getStName()) && stu.getStName().length() < 20) {

	if(Objects.nonNull(stu.getStAge()) && stu.getStAge() > 0 && stu.getStAge() < 60) {

		if(Object.notNull(stu.getGender()) && ("男".equest(stu.getGender()) || "女".equest(stu.getGender()))) {
			//TODO ...對(duì)符合的數(shù)據(jù)進(jìn)行下一步的處理

		}
	}
}

//抽象的父類
public abstract class AbsCheckStudent {
	//包含有自身的一個(gè)屬性，其作業(yè)主要是下一個(gè)對(duì)數(shù)據(jù)的處理者
	protected AbsCheckStudent absCheckStudent;
	//設(shè)定下一個(gè)處理者
	public void setAbsCheckStudent(AbsCheckStudent absCheckStudent) {
		this.absCheckStudent = absCheckStudent;
	}
	//此方法是業(yè)務(wù)層調(diào)用的方法，即業(yè)務(wù)調(diào)用此方法，把學(xué)生的集合做參數(shù)傳進(jìn)來(lái)即可。
	public void handleCheck(List<Student> studentList) {
		if (Objects.nonNull(studentList) && !studentList.isEmpty()) {
			List<Student> checkIsOk = checkStudent(studentList);
			//判斷下一個(gè)處理者是不是null，即還有沒(méi)有下一個(gè)處理者，且判斷數(shù)據(jù)是否為空
			if (Objects.nonNull(absCheckStudent) && Objects.nonNull(checkIsOk) && !checkIsOk.isEmpty()) {
				//調(diào)用下一個(gè)處理者的業(yè)務(wù)處理方法
				absCheckStudent.handleCheck(checkIsOk);
			}
		}
	}
	//此方法是由不同的子類來(lái)進(jìn)行不同的處理實(shí)現(xiàn)
	public abstract List<Student> checkStudent(List<Student> studentList);
}

public class StNameCheck extends AbsCheckStudent{

	@Override
	public List<Student> checkStudent(List<Student> studentList) {
		//獲取學(xué)生名稱不符合條件的學(xué)生對(duì)象
		List<Student> stNameIsNotOk = studentList.stream().filter(stu -> {
			String stName = stu.getStName();
			return Objects.isNull(stName) || "".equals(stName);
		}).collect(Collectors.toList());
		System.out.println("名字校驗(yàn)不通過(guò)的數(shù)據(jù)有："+ stNameIsNotOk.toString());
		//在原有的集合中移除不符合學(xué)生姓名的對(duì)象集合
		studentList.removeAll(stNameIsNotOk);
		System.out.println("名字校驗(yàn)通過(guò)的數(shù)據(jù)：" + studentList.toString());
		//返回通過(guò)學(xué)生姓名校驗(yàn)的學(xué)生的集合
		return studentList;
    }
}

public class StAgeCheck extends AbsCheckStudent{
	@Override
	public List<Student> checkStudent(List<Student> studentList) {
		//獲取學(xué)生年齡不符合條件的學(xué)生對(duì)象
		List<Student> stAgeIsNotOk = studentList.stream().filter(stu -> {
			Integer stAge = stu.getAge();
			return Objects.isNull(stAge) || stAge <= 0 || stAge >= 60;
		}).collect(Collectors.toList());
		System.out.println("年齡校驗(yàn)不通過(guò)的數(shù)據(jù)有：" + stAgeIsNotOk.toString());
		//在原有的集合中移除不符合學(xué)生年齡的對(duì)象集合
		studentList.removeAll(stAgeIsNotOk);
		System.out.println("年齡校驗(yàn)通過(guò)的數(shù)據(jù)：" + studentList.toString());
		//返回通過(guò)學(xué)生姓名校驗(yàn)的學(xué)生的集合
		return studentList;
    }
}

public class StGenderCheck extends AbsCheckStudent{
	@Override
	public List<Student> checkStudent(List<Student> studentList) {
		//獲取學(xué)生年齡不符合條件的學(xué)生對(duì)象
		List<Student> stGenderIsNotOk = studentList.stream().filter(stu -> {
			String gender = stu.getGender();
			return Objects.isNull(gender) || !("男".equals(gender) || "女".equals(gender));
		}).collect(Collectors.toList());
		System.out.println("性別校驗(yàn)沒(méi)有通過(guò)的數(shù)據(jù)：" + stGenderIsNotOk.toString());
		//在原有的集合中移除不符合學(xué)生年齡的對(duì)象集合
		studentList.removeAll(stGenderIsNotOk);
		System.out.println("性別校驗(yàn)通過(guò)的數(shù)據(jù)：" + studentList.toString());
		//返回通過(guò)學(xué)生姓名校驗(yàn)的學(xué)生的集合
		return studentList;
    }
}

public class Chain {
	public static AbsCheckStudent getStudentCheck() {
		//校驗(yàn)姓名
		AbsCheckStudent stNameCheck = new StNameCheck();
		//校驗(yàn)?zāi)挲g
		AbsCheckStudent stAgeCheck = new StAgeCheck();
		//校驗(yàn)性別
		AbsCheckStudent stGenderCheck = new StGenderCheck();

		//設(shè)置好責(zé)任鏈的順序，把校驗(yàn)?zāi)挲g的子類當(dāng)作StNameCheck中的下一個(gè)處理者
		stNameCheck.setAbsCheckStudent(stAgeCheck);
		//把校驗(yàn)性別的子類當(dāng)作StAgeCheck中的下一個(gè)處理者
		stAgeCheck.setAbsCheckStudent(stGenderCheck);
	}

	public static void main(String[] args) {
		AbsCheckStudent studentCheck = getStudentCheck();
		List<Student> studentList = getStudents();
		studentCheck.handleCheck(studentList);
	}

	public static List<Student> getStudents() {
		List<Student> result = new ArrayList<>();
		Student s1 = new Student();
		s1.setAge(12);
		s1.setGender("男");
		s1.setStName("張三");
		s1.setStNo("");

		Student s2 = new Student();
		s2.setAge(12);
		s2.setGender("男1");
		s2.setStName("張三");
		s2.setStNo("123");

		Student s3 = new Student();
		s3.setAge(12);
		s3.setGender("男");
		s3.setStName("張三");
		s3.setStNo("123");

		result.add(s1);
		result.add(s2);
		result.add(s3);
		return result;
    }
}

public class StGenderCheck extends AbsCheckStudent{
	@Override
	public List<Student> checkStudent(List<Student> studentList) {
		//獲取學(xué)生年齡不符合條件的學(xué)生對(duì)象
		List<Student> stNoIsNotOk = studentList.stream().filter(stu -> {
			String stNo = stu.getStNo();
			return Objects.isNull(stNo) || "".equals(stNo) || stNo.length() > 20;
		}).collect(Collectors.toList());
		//TODO 做數(shù)據(jù)庫(kù)中的惟一性的校驗(yàn)等
		System.out.println("編號(hào)校驗(yàn)不通過(guò)的數(shù)據(jù)有：" + stNoIsNotOk.toString());
		//在原有的集合中移除不符合學(xué)生編號(hào)的對(duì)象集合
		studentList.removeAll(stNoIsNotOk);
		System.out.println("通過(guò)了全部的校驗(yàn)的數(shù)據(jù)有：" + studentList);
		//TODO 全部通過(guò)校驗(yàn)了，保存數(shù)據(jù)到數(shù)據(jù)庫(kù) save(studentList);
		return null;
    }
}

public class Chain {
	public static AbsCheckStudent getStudentCheck() {
		//校驗(yàn)姓名
		AbsCheckStudent stNameCheck = new StNameCheck();
		//校驗(yàn)?zāi)挲g
		AbsCheckStudent stAgeCheck = new StAgeCheck();
		//校驗(yàn)性別
		AbsCheckStudent stGenderCheck = new StGenderCheck();

		//設(shè)置好責(zé)任鏈的順序，把校驗(yàn)?zāi)挲g的子類當(dāng)作StNameCheck中的下一個(gè)處理者
		stNameCheck.setAbsCheckStudent(stAgeCheck);
		//把校驗(yàn)性別的子類當(dāng)作StAgeCheck中的下一個(gè)處理者
		stAgeCheck.setAbsCheckStudent(stGenderCheck);

		AbsCheckStudent stNoCheck = new StNoCheck();
		//把學(xué)生的編號(hào)校驗(yàn)放到性別校驗(yàn)的后面
		stGenderCheck.setAbsCheckStudent(stNoCheck);
	}

	// ......
}