//创建一个类,在该类上应用标准
public class Person {
private String name;
private String gender;
private String maritalStatus;
public Person(String name, String gender, String maritalStatus) {
this.name = name;
this.gender = gender;
this.maritalStatus = maritalStatus;
}
public String getName() {
return name;
}
public String getGender() {
return gender;
}
public String getMaritalStatus() {
return maritalStatus;
}
}
import java.util.List;
// create an interface standard
public interface Cirteria {
public List<Person> meetCirteria(List<Person> persons);
}
import java.util.ArrayList;
import java.util.List;// create an entity class that implements the interface Cirteria
public class CirteriaMale implements Cirteria {
@Override
public List<Person> meetCirteria(List<Person> persons) {
List<Person> malePersons = new ArrayList<Person>();
for (Person person : persons) {
if (person.getGender().equalsIgnoreCase("MALE")) {
malePersons.add(person);
}
}
return malePersons;
}
}
import java.util.ArrayList;
import java.util.List;public class CirteriaFemale implements Cirteria {
@Override
public List<Person> meetCirteria(List<Person> persons) {
List<Person> femalePersons = new ArrayList<Person>();
for (Person person : persons) {
if (person.getGender().equalsIgnoreCase("FEMALE")) {
femalePersons.add(person);
}
}
return femalePersons;
}
}
import java.util.ArrayList;
import java.util.List;;public class CirteriaSingle implements Cirteria {
@Override
public List<Person> meetCirteria(List<Person> persons) {
List<Person> singlePersons = new ArrayList<Person>();
for (Person person : persons) {
if (person.getMaritalStatus().equalsIgnoreCase("SINGLE")) {
singlePersons.add(person);
}
}
return singlePersons;
}
}
import java.util.List;
public class AndCirteria implements Cirteria {
private Cirteria cirteria;
private Cirteria otherCirteria;
public AndCirteria(Cirteria cirteria, Cirteria otherCirteria) {
this.cirteria = cirteria;
this.otherCirteria = otherCirteria;
}
@Override
public List<Person> meetCirteria(List<Person> persons) {
List<Person> firstCirteriaPersons = cirteria.meetCirteria(persons);
return otherCirteria.meetCirteria(firstCirteriaPersons);
}
}
import java.util.List;
public class OrCirteria implements Cirteria {
private Cirteria cirteria;
private Cirteria otherCirteria;
public OrCirteria(Cirteria cirteria, Cirteria otherCirteria) {
this.cirteria = cirteria;
this.otherCirteria = otherCirteria;
}
@Override
public List<Person> meetCirteria(List<Person> persons) {
List<Person> firstCirteriaItems = cirteria.meetCirteria(persons);
List<Person> otherCirteriaItems = otherCirteria.meetCirteria(persons);
for (Person person : otherCirteriaItems) {
if (!firstCirteriaItems.contains(person)) {
firstCirteriaItems.add(person);
}
}
return firstCirteriaItems;
}
}
import java.util.ArrayList;
import java.util.List;// do not use standards and their union to filter objects person
{class CirteriaPatternDemo public
public static void main (String [] args) {
/ *
* filter mode or standard mode is a design model that allows developers to use different criteria to filter a set of objects, the logical operation to decoupling manner linked to them, this type of design pattern belongs structural model, he combined a single criterion to obtain a plurality of standard
* /
List <the Person> = new new persons the ArrayList <the Person> ();
persons.add (new new the Person ( "Robert", "Male", "Single"));
persons.add (new new the Person ( "Jhon", "Male", "Married"));
persons.add (new new the Person ( "Laure", "Female "," Married "));
persons.add (new new the Person (" Diana "," Female "," Single "));
persons.add (new new the Person (" Mike "," Male "," Single "));
persons.add(new Person("Bobby", "Male", "Single"));
Cirteria male = new CirteriaMale();
Cirteria female = new CirteriaFemale();
Cirteria single = new CirteriaSingle();
Cirteria singleMale = new AndCirteria(single, male);
Cirteria singleOrFemale = new OrCirteria(single, female);
System.out.println("Males: ");
printPersons(male.meetCirteria(persons));
System.out.println("\nFemales: ");
printPersons(female.meetCirteria(persons));
System.out.println("\nSing Males: ");
printPersons(singleMale.meetCirteria(persons));
System.out.println("\nSingle Or Females: ");
printPersons(singleOrFemale.meetCirteria(persons));
}
public static void printPersons(List<Person> persons) {
for (Person person : persons) {
System.out.println("person : [name : " + person.getName() + ", gender : " + person.getGender() + ", marital status : " + person.getMaritalStatus() + " ]");
}
}
}