package builderpattern2;

public class User {

private String name;

private int age;

private String phone;

//通过一个Builder对象传入多个属性值，可以一次性对User的属性进行赋值

//而且User的构造方法定义成private，意味着不可以在客户端创建User对象，必须通过其建造器Builder来构造

private User(UserBuilder builder){

this.name = builder.name;

this.age = builder.age;

this.phone = builder.phone;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public String getPhone() {

return phone;

}

public void setPhone(String phone) {

this.phone = phone;

}

//注意定义成static，否则无法在User没实例化前调用这个UserBuilder内部类来对User进行构建

public static class UserBuilder implements Builder {

private String name;

private int age;

private String phone;

public UserBuilder() {

// TODO Auto-generated constructor stub

}

//通过build方法对User的构造方法进行对象注入

@Override

public User build() {

// TODO Auto-generated method stub

User user = new User(this);

return user;

}

//通过以下的三个方法对Builder的属性进行赋值，然后返回Builder的对象。

//实际上就是先对建造器的属性赋值，然后通过建造器携带数据传入User 中，最后用建造器的build方法对User进行实例化

public UserBuilder Name(String name){

this.name = name;

return this;

}

public UserBuilder Age(int age){

this.age = age;

return this;

}

public UserBuilder Phone(String phone){

this.phone = phone;

return this;

}

}

}