设计模式--Bulider模式

package com.github.xsh.demo.model;

    /**
     * @description:
     * @date: 2019/5/16
     **/
    public class Student {
    
        private int id;
      
        private String name;
       
        private String passwd;
      
        private String sex;
        
        private String address;
    
        private Student(Builder builder) {
            this.id = builder.id;
            this.name = builder.name;
            this.passwd = builder.passwd;
            this.sex = builder.sex;
            this.address = builder.address;
        }
    
        /**
         * Builder
         */
        public static class Builder {
            private int id;
            private String name;
            private String passwd;
            private String sex;
            private String address;
    
            public Builder(int id, String name) {
                this.id = id;
                this.name = name;
            }
    
            public Builder passwd(String passwd) {
                this.passwd = passwd;
                return this;
            }
    
            public Builder sex(String sex) {
                this.sex = sex;
                return this;
            }
    
            public Builder address(String address) {
                this.address = address;
                return this;
            }
    
            public Student build() {
                return new Student(this);
            }
        }
    
        @Override
        public String toString() {
            return String.format("%s[id=%s, name=%s, passwd=%s, sex=%s, address=%s]",
                    getClass().getSimpleName(), id, name, passwd, sex, address);
        }
    
        //为了使阅读简洁，此处省略getter setter
    
    
    }


        @Test
        public void buliderTest(){
            Student student = new Student.Builder(1,"jack")
                    .sex("男士")
                    .address("地球村")
                    .passwd("1232")
                    .build();
            //先填充属性再构建除对象，看上去是不是逼格满满        
            System.out.println(student);
        }

Student[id=1, name=jack, passwd=1232, sex=男士, address=地球村]