lombok详解 深入解析Lombok框架(2)

lombok详解

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <artifactId>spring-boot-starter-parent</artifactId>
        <groupId>org.springframework.boot</groupId>
        <version>2.7.15</version>
    </parent>
    <groupId>com.zbbmeta</groupId>
    <artifactId>zbbmeta-lombok-demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <maven.compiler.source>11</maven.compiler.source>
        <maven.compiler.target>11</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.30</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
        </dependency>
    </dependencies>
</project>

• 创建user表

create table user
(
    id     bigint      null comment '主键',
    name   varchar(20) null,
    age    int         null,
    s_name varchar(20) null
);
-- 插入数据
INSERT INTO backend_db.user (id, name, age, s_name) VALUES (1740047068249387009, 'zbbmeta', 18, 'test1');
INSERT INTO backend_db.user (id, name, age, s_name) VALUES (1740047068350050306, 'springbootIT袋网', 20, 'test2');
INSERT INTO backend_db.user (id, name, age, s_name) VALUES (1740047068350050307, 'springbootIT袋网2', 22, null);

【步骤二】：创建User类并加入lombok提供的注解

package com.zbbmeta.entity;
import java.io.Serializable;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
/**
 * @TableName user
 */
@Data
public class User implements Serializable {
    private Long id;
    private String name;
    private Integer age;
    //注意该特殊字段
    private String sName;
    private static final long serialVersionUID = 1L;
}

【步骤三】：创建UserController

package com.zbbmeta.controller;
import com.zbbmeta.entity.User;
import com.zbbmeta.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
/**
 * @author springbootIT袋网
 * @description: TODO
 */
@RestController
@RequestMapping("/user")
public class UserController {
    @Autowired
    UserService userService;
    //查询User表数据
    @GetMapping
    public List<User> getUsers(){
        List<User> list = userService.getUsers();
        return list;
    }
}