视频讲解:
https://www.bilibili.com/video/BV16i4y1G7i2/
工程概述:
前后端分离，进行简单增查改删（CRUD）
前端使用VUE
后端使用Spring Data JPA
数据库使用MySQL
#EmployeeController.java
package com.deepincoding.springdatajpamysqlcrud.controller;
import com.deepincoding.springdatajpamysqlcrud.entity.Employee;
import com.deepincoding.springdatajpamysqlcrud.model.BaseResponse;
import com.deepincoding.springdatajpamysqlcrud.service.EmployeeService;
import lombok.extern.log4j.Log4j2;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.web.bind.annotation.*;
import java.util.Optional;
@RestController
@RequestMapping("/api/employee")
@Log4j2
public class EmployeeController extends BaseController {
@Autowired
private EmployeeService employeeService;
@PostMapping
public BaseResponse<String> save(@RequestBody Employee employee){
employeeService.save(employee);
return new BaseResponse<>(SUCCESS,"保存成功");
}
@GetMapping("/{id}")
public BaseResponse<Optional<Employee>> findById(@PathVariable Long id){
Optional<Employee> employee = employeeService.findById(id);
return new BaseResponse<>(SUCCESS,"获取成功",employee);
}
@GetMapping
public BaseResponse<Page<Employee>> findAll(@PageableDefault(sort = {"id"},direction = Sort.Direction.DESC ,size = 3) Pageable pageable){
log.info("pageable:{}",pageable.getPageNumber());
Page<Employee> employees = employeeService.findAll(pageable);
return new BaseResponse<>(SUCCESS,"获取成功",employees);
}
@PutMapping
public BaseResponse<String> update(@RequestBody Employee employee){
employeeService.save(employee);
return new BaseResponse<>(SUCCESS,"修改成功");
}
@DeleteMapping("/{id}")
public BaseResponse<String> delete(@PathVariable Long id){
employeeService.delete(id);
return new BaseResponse<>(SUCCESS,"删除成功");
}
}
#CorsConfig.java
package com.deepincoding.springdatajpamysqlcrud.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class CorsConfig implements WebMvcConfigurer {
/**
* 跨域配置
* @param registry
*/
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowedOrigins("*")
.allowedMethods("*");
}
}
#Employee.java
package com.deepincoding.springdatajpamysqlcrud.entity;
import com.deepincoding.springdatajpamysqlcrud.enums.Gender;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import javax.persistence.*;
@Entity
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Employee {
@Id
@GeneratedValue(strategy= GenerationType.AUTO)
private long id;
private String name;
@Enumerated(EnumType.STRING)
private Gender gender;
private Integer age;
private String introduce;
}
#EmployeeServiceImpl.java
package com.deepincoding.springdatajpamysqlcrud.service;
import com.deepincoding.springdatajpamysqlcrud.entity.Employee;
import com.deepincoding.springdatajpamysqlcrud.repositories.EmployeeRep;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.stereotype.Service;
import org.springframework.data.domain.Pageable;
import java.util.Optional;
@Service
public class EmployeeServiceImpl implements EmployeeService{
@Autowired
private EmployeeRep employeeRep;
@Override
public void save(Employee employee) {
employeeRep.save(employee);
}
@Override
public Optional<Employee> findById(Long id) {
return employeeRep.findById(id);
}
@Override
public void update(Employee employee) {
employeeRep.save(employee);
}
@Override
public void delete(Long id) { employeeRep.deleteById(id); }
@Override
public Page<Employee> findAll(Pageable pageable) {
return employeeRep.findAll(pageable);
}
}
