SpringBoot业务策略模式多实现类注入过程(Map注入)

public interface LoginService {


    String passwordSalt = "test";


    /**
     * @param postAccessToken 请求体
     */
    ExecResult<String> prop(Login postAccessToken);

    /**
     * 是否支持特定业务信息的处理
     *
     * @return
     */
    Boolean isSupported(Login postAccessToken);
}

//实现一
@Slf4j
@Service
public class DingdingServiceImpl implements LoginService {



    @Override
    public ExecResult<String> prop(Login postAccessToken) {
 
      System.out.println("钉钉用户");
        return ExecResultUtil.success(JwtUtil.build());
    }

    @Override
    public Boolean isSupported(Login postAccessToken) {
        return Objects.equals(GrantTypeEnum.DINGDING.getCode(), postAccessToken.getGrantType());
    }
}

//实现二
@Service
public class PasswordLoginServiceImpl implements LoginService {


    @Autowired
    private UserAccountService userAccountService;

    @Override
    public ExecResult<String> prop(Login postAccessToken) {
      
      System.out.println("普通用户");
    return ExecResultUtil.success(JwtUtil.build());
    }

    @Override
    public Boolean isSupported(Login postAccessToken) {
        return Objects.equals(GrantTypeEnum.PASSWORD.getCode(), postAccessToken.getGrantType());
    }
}

//实现三
@Service
public class SysPasswordLoginServiceImpl implements LoginService {


    @Autowired
    private UserAccountService userAccountService;

    @Override
    public ExecResult<String> prop(Login postAccessToken) {
       
      System.out.println("系统用户");
return ExecResultUtil.success(JwtUtil.build());
    }

    @Override
    public Boolean isSupported(Login postAccessToken) {
        return Objects.equals(GrantTypeEnum.SYS_PASSWORD.getCode(), postAccessToken.getGrantType());
    }
}

@AllArgsConstructor
public enum GrantTypeEnum {

    PASSWORD("password", "普通用户密码"),
    PHONE("phone", "普通手机验证码"),
    WE_CHAT("wechat", "普通微信"),
    DINGDING("dingding", "普通钉钉"),

    SYS_PASSWORD("sys_password", "系统用户密码"),
    SYS_PHONE("sys_phone", "系统手机验证码"),
    SYS_WE_CHAT("sys_wechat", "系统微信"),
    SYS_DINGDING("sys_dingding", "系统钉钉"),
    ;
    private String code;

    private String message;

    public String getCode() {
        return this.code;
    }

    public String getMessage() {
        return this.message;
    }}

@Service
public class LoginServiceImpl {

//关键在这个，原理：当一个接口有多个实现类的时候，key为实现类名，value为实现类对象
    private Map<String, LoginService> procMap = new ConcurrentHashMap<>();

    @Autowired(required = false)//这个注入了多个实现类对象
    private List<LoginService> procList = Collections.emptyList();

    public ExecResult<String> prop(Login login) {

        LoginService proc = getProc(login);
        if (null == proc) {
            throw new RuntimeException("no grant type:" + login.getGrantType());
        }
        return proc.prop(login);
    }

    private LoginService getProc(Login grantType) {
        LoginService querier = procMap.get(grantType.getGrantType());
        if (querier != null) {
            return querier;
        }
        for (LoginService item : procList) {
            if (item.isSupported(grantType)) {
                querier = item;
                procMap.put(grantType.getGrantType(), querier);
                return querier;
            }
        }
        return null;
    }

}

    @Autowired
    private LoginServiceImpl loginService;


    @ApiOperation(value = "登录")
    @PostMapping("/login")
    public ExecResult<String> postAccessToken(@RequestBody Login login) {
        return loginService.prop(login);
    }