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org.springframework.boot spring-boot-starter-data-jpa 2.6.5
配置数据源信息(application.yml)spring:
datasource:
username: userName
password: password
name: databaseName
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://192.168.253.129:3306/databaseName?serverTimezone=UTC&characterEncoding=UTF-8
编写实体类user@Entity
@Data
@Table(name = "user")
public class SysUser {@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
@Column
private String username;
@Column
private String password;
编写daopublic interface SysUserDao extends JpaRepository, JpaSpecificationExecutor{SysUser findByUsername(String username);
}
定义service接口public interface SysUserService {Listsearch();
SysUser searchById(Integer id);
SysUser searchByUsername(String username);
boolean add(SysUser sysUser);
boolean update(SysUser sysUser);
boolean delete(Integer id);
}
继承server接口实现方法@Service
public class SysUserServiceImpl implements SysUserService {@Autowired
SysUserDao sysUserDao;
@Override
public Listsearch() {return sysUserDao.findAll();
}
@Override
public SysUser searchById(Integer id) {return sysUserDao.findById(id).get();
}
@Override
public SysUser searchByUsername(String username) {return sysUserDao.findByUsername(username);
}
@Override
public boolean add(SysUser sysUser) {return sysUserDao.save(sysUser) != null;
}
@Override
public boolean update(SysUser sysUser) {return sysUserDao.save(sysUser) != null;
}
@Override
public boolean delete(Integer id) {try {sysUserDao.deleteById(id);
} catch (Exception e) {return false;
}
return true;
}
}
编写controller@Controller
@RequestMapping("sysUser")
public class SysUserController {@Autowired
SysUserService sysUserService;
@Autowired
SysRoleService sysRoleService;
@RequestMapping("search")
public ModelAndView search() {ModelAndView mv = new ModelAndView("sysUser/show");
Listlist = sysUserService.search();
mv.addObject("list", list);
return mv;
}
}
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