21Java标准JavaBean类及其快捷键生成

太过爱你忘了你带给我的痛 2024-05-01 16:18 50阅读 0赞

**目录**

标准JavaBean类

标准JavaBean类的细节

快捷键

插件PTG

--------------------

## 标准JavaBean类 ##

### 标准JavaBean类的细节 ###

1.  类名需要见名知意
2.  成员变量使用private修饰
3.  提供至少两个构造方法：无参构造方法、带全部参数的构造方法
4.  get和set方法：提供每一个成员变量对应的setXxx()/getXxx()
5.  如果还有其他行为，也需要写上

例：

![373fb103683b46a997b4fb8d78542f42.jpeg][]

public class User {
        //1.私有化全部的成员变量
        //2.空参构造
        //3.带全部参数的构造
        //4.针对于每一个私有化的成员变量都要提供其对应的get和set方法
        //5.如果当前事物还有其他行为，那么也要写出来，比如学生的吃饭，睡觉等行为
    
        private String username;//用户名
        private String password;//密码
        private String email;//邮箱
        private char gender;//性别
        private int age;//年龄
    
        //空参构造方法
        public User() {
        }
    
        //带全部参数的构造
        public User(String username, String password, String email, char gender, int age) {
            this.username = username;
            this.password = password;
            this.email = email;
            this.gender = gender;
            this.age = age;
        }
    
        //get和set
    
        public String getUsername() {
            return username;
        }
    
        public void setUsername(String username) {
            this.username = username;
        }
    
        public String getPassword() {
            return password;
        }
    
        public void setPassword(String password) {
            this.password = password;
        }
    
        public String getEmail() {
            return email;
        }
    
        public void setEmail(String email) {
            this.email = email;
        }
    
        public char getGender() {
            return gender;
        }
    
        public void setGender(char gender) {
            this.gender = gender;
        }
    
        public int getAge() {
            return age;
        }
    
        public void setAge(int age) {
            this.age = age;
        }
    
        public void eat(){
            System.out.println(username + "在吃饭");
        }
    }
    
    public class Test {
        public static void main(String[] args) {
            //写一个标准的javabean类
            //咱们在课后只要能把这个标准的javabean能自己写出来，那么就表示今天的知识点就ok了
    
    
            //利用空参构造创建对象
            User u1 = new User();
            //如果利用空参创建对象，还想赋值只能用set方法赋值
            u1.setUsername("zhangsan");
            u1.setPassword("1234qwer");
            u1.setEmail("itheima@itcast.cn");
            u1.setGender('男');
            u1.setAge(23);
            //获取属性的值并打印
            System.out.println(u1.getUsername() + ", " + u1.getPassword()
                    + ", " + u1.getEmail() + ", " + u1.getGender() + ", " + u1.getAge());
            u1.eat();
    
            System.out.println("=============================");
    
            //简单的办法
            //利用带全部参数的构造来创建对象
            //快捷键:ctrl + p
            User u2 = new User("lisi","12345678","lisi@itcast.cn",'女',24);
            System.out.println(u2.getUsername() + ", " + u2.getPassword()
                    + ", " + u2.getEmail() + ", " + u2.getGender() + ", " + u2.getAge());
            u2.eat();
        }
    }

### 快捷键 ###

art+insert或者art+insert+Fn

**快速生成带全部参数的构造方法：**

![1c1804771c4a4f79b1712cc2ecbc8e09.png][]

![1ec3180d1fce4e93b94a1febf9178aea.png][]

**生成所有set和get函数：**

![f74633ba112c4c078f9eb5619b75341d.png][]

### 插件PTG ###

![447c0179051646f089c5d84fe73e1482.png][]

![54f1e6d974fd45e89ac1086250f17180.png][]

![c55a29b13b594962bde133c6f0d5b4d7.png][]

##  ##

[373fb103683b46a997b4fb8d78542f42.jpeg]: https://image.dandelioncloud.cn/pgy_files/images/2024/05/01/defaf406253e469c8f426efe7ac7a1f9.jpeg
[1c1804771c4a4f79b1712cc2ecbc8e09.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/05/01/f2198b6af94b4497832c02d294291388.png
[1ec3180d1fce4e93b94a1febf9178aea.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/05/01/b4f3b15cfaa447ec8d7633e48a6d0927.png
[f74633ba112c4c078f9eb5619b75341d.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/05/01/201896c54dc848b3a0d3f59ca7bf43b7.png
[447c0179051646f089c5d84fe73e1482.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/05/01/077dee47a1dd4aeead55c38e41da7c7e.png
[54f1e6d974fd45e89ac1086250f17180.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/05/01/51acaddfdae248859d9a62841bc29c34.png
[c55a29b13b594962bde133c6f0d5b4d7.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/05/01/841a30b3c66042b2ac4104086f67943b.png