idea使用lombok

1. 下载Lombok 插件

打开idea>file>Settings...( 或快捷键Ctrl+Alt+S)

选择Plugins >收索 lombok >install >Apply>OK

2 .引入依赖

复制代码到pom.xml中

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.20</version>
    <scope>provided</scope>
</dependency>

3 使用测试代码

创建实体类

// 引入lombok jar包
import lombok.Data;

/**
 * @ClassName TestUser
 * @Description 
 * @Author 张凯强
 * @Date 2020/11/16 13:44
 * @Version 1.0
 **/
@Data
@AllArgsConstructor // 全参构造
@NoArgsConstructor  // 无参构造
public class TestUser {
    
    private String userName;
    private String sex;
    private Integer age;
}

创建测试方法

public static void main(String[] args) {
    //全参
    TestUser testUser = new TestUser("张凯强","男",20);
    System.out.println(testUser.getUserName());
    System.out.println(testUser.getSex());
    System.out.println(testUser.getAge());
    System.out.println("========================");
    testUser.setUserName("新月");
    System.out.println(testUser.getUserName());
}

张凯强
男
20
========================
新月

4 查看编译后的类对象

public class TestUser {
    private String userName;
    private String sex;
    private Integer age;

    public String getUserName() {
        return this.userName;
    }

    public String getSex() {
        return this.sex;
    }

    public Integer getAge() {
        return this.age;
    }

    public void setUserName(final String userName) {
        this.userName = userName;
    }

    public void setSex(final String sex) {
        this.sex = sex;
    }

    public void setAge(final Integer age) {
        this.age = age;
    }

    public boolean equals(final Object o) {
        if (o == this) {
            return true;
        } else if (!(o instanceof TestUser)) {
            return false;
        } else {
            TestUser other = (TestUser)o;
            if (!other.canEqual(this)) {
                return false;
            } else {
                label47: {
                    Object this$age = this.getAge();
                    Object other$age = other.getAge();
                    if (this$age == null) {
                        if (other$age == null) {
                            break label47;
                        }
                    } else if (this$age.equals(other$age)) {
                        break label47;
                    }

                    return false;
                }

                Object this$userName = this.getUserName();
                Object other$userName = other.getUserName();
                if (this$userName == null) {
                    if (other$userName != null) {
                        return false;
                    }
                } else if (!this$userName.equals(other$userName)) {
                    return false;
                }

                Object this$sex = this.getSex();
                Object other$sex = other.getSex();
                if (this$sex == null) {
                    if (other$sex != null) {
                        return false;
                    }
                } else if (!this$sex.equals(other$sex)) {
                    return false;
                }

                return true;
            }
        }
    }

    protected boolean canEqual(final Object other) {
        return other instanceof TestUser;
    }

    public int hashCode() {
        int PRIME = true;
        int result = 1;
        Object $age = this.getAge();
        int result = result * 59 + ($age == null ? 43 : $age.hashCode());
        Object $userName = this.getUserName();
        result = result * 59 + ($userName == null ? 43 : $userName.hashCode());
        Object $sex = this.getSex();
        result = result * 59 + ($sex == null ? 43 : $sex.hashCode());
        return result;
    }

    public String toString() {
        return "TestUser(userName=" + this.getUserName() + ", sex=" + this.getSex() + ", age=" + this.getAge() + ")";
    }

    public TestUser(final String userName, final String sex, final Integer age) {
        this.userName = userName;
        this.sex = sex;
        this.age = age;
    }

    public TestUser() {
    }
}

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