一、Spring Boot 介绍
Spring Boot 是一个快速开发框架。它不仅继承了Spring框架原有的优秀特性，而且还通过简化配置来进一步简化了Spring应用的整个搭建和开发过程。
二、如何使用
1.新建Maven工程，导入依赖：
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.1.RELEASE</version> </parent>
首先导入父包，接下来导入它的子包：
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies>
2.创建实体类：
package com.wts.entity; import lombok.Data; @Data public class Student { private long id; private String name; }
3.创建实例接口：
public interface StudentRepository { public Collection<Student> findAll(); public Student findById(long id); public int insertStudent(Student student); public int updateStudent(Student student); public int deleteStudent(long id); }
为了简单起见，创建一个实现类来取代数据库查询：
public class StudentRepositoryImpl implements StudentRepository { private static Map<Long, Student> studentMap; static { studentMap = new HashMap<>(); studentMap.put(1L, new Student(1L, "张三")); studentMap.put(2L, new Student(2L, "李四")); studentMap.put(3L, new Student(3L, "王五")); } @Override public Collection<Student> findAll() { return studentMap.values(); } @Override public Student findById(long id) { return studentMap.get(id); } @Override public int insertStudent(Student student) { studentMap.put(student.getId(), student); return 1; } @Override public int updateStudent(Student student) { return insertStudent(student); } @Override public int deleteStudent(long id) { studentMap.remove(id); return 1; } }
4.创建控制器：
@RestController @RequestMapping("/student") public class StudentHandler { @Autowired private StudentRepository studentRepository; @GetMapping("/findAll") public Collection<Student> findAll() { return studentRepository.findAll(); } @GetMapping("/findById/{id}") public Student findById(@PathVariable("id") long id) { return studentRepository.findById(id); } @PostMapping("/insertStudent") public int insertStudent(@RequestBody Student student) { return studentRepository.insertStudent(student); } @PutMapping("/updateStudent") public int updateStudent(@RequestBody Student student) { return studentRepository.updateStudent(student); } @DeleteMapping("/deleteStudent/{id}") public int deleteStudent(@PathVariable("id") long id) { return studentRepository.deleteStudent(id); } }
到这里，需要注意前面的repository实现类需要添加一个@Repository注解。
5.创建启动类：
@SpringBootApplication public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
6.运行，浏览器访问http://localhost:8080/student/findAll
原文：https://www.cnblogs.com/viewts/p/13218962.html