java中用builder模式实现实体类的创建

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package com.panther.builder;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * 在设计模式中对Builder模式的定义是用于构建复杂对象的一种模式， * 所构建的对象往往需要多步初始化或赋值才能完成。 * 那么，在实际的开发过程中，我们哪些地方适合用到Builder模式呢？ * 其中使用Builder模式来替代多参数构造函数是一个比较好的实践法则。 * Created by panther.dongdong on 2015/11/16. */public class Student {    private static final Logger LOGGER = LoggerFactory.getLogger(Student.class.getName());    private int id;    private int age;    private String name;    private String sex;    private String love;    private String phone;    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getSex() {        return sex;    }    public void setSex(String sex) {        this.sex = sex;    }    public String getLove() {        return love;    }    public void setLove(String love) {        this.love = love;    }    public String getPhone() {        return phone;    }    public void setPhone(String phone) {        this.phone = phone;    }    public static Builder create() {        return new Builder();    }    public Student(Builder builder) {        this.id = builder.id;        this.age = builder.age;        this.name = builder.name;        this.sex = builder.sex;        this.love = builder.love;        this.phone = builder.phone;    }    public static class Builder {        private int id = 0;        private int age = 0;        private String name = null;        private String sex = null;        private String love = null;        private String phone = null;        //构建的步骤        public Builder addId(int id) {            this.id = id;            return this;        }        public Builder addAge(int age) {            this.age = age;            return this;        }        public Builder addName(String name) {            this.name = name;            return this;        }        public Builder addSex(String sex) {            this.sex = sex;            return this;        }        public Builder addLove(String love) {            this.love = love;            return this;        }        public Builder addPhone(String phone) {            this.phone = phone;            return this;        }        public Student build() {            return new Student(this);        }    }    @Override    public String toString() {        return "Student{" +                "id=" + id +                ", age=" + age +                ", name='" + name + '\'' +                ", sex='" + sex + '\'' +                ", love='" + love + '\'' +                ", phone='" + phone + '\'' +                '}';    }    /**     * 测试生成Student     *     * @param args     */    public static void main(String[] args) {        Student student = Student.create().addAge(18).addName("panther").addLove("play")                .addPhone("110").addSex("男").build();        LOGGER.info("{}", student.toString());    }}
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