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优化：基于阿里巴巴 Java 开发手册(黄山版)优化方法排序及访问权限修饰符

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1.编程规约>OOP规约>第20条：
【推荐】当一个类有多个构造方法，或者多个同名方法，这些方法应该按顺序放置在一起，便于阅读，
此条规则优先于下一条。
2.编程规约>OOP规约>第21条：
【推荐】类内方法定义的顺序依次是：公有方法或保护方法 > 私有方法 > getter / setter 方法。
说明：公有方法是类的调用者和维护者最关心的方法，首屏展示最好；保护方法虽然只是子类关心，也可能是“模板设
计模式”下的核心方法；而私有方法外部一般不需要特别关心，是一个黑盒实现；因为承载的信息价值较低，所有
Service 和 DAO 的 getter / setter 方法放在类体最后。
3.编程规约>OOP规约>第26条：
【推荐】类成员与方法访问控制从严：
  1）如果不允许外部直接通过 new 来创建对象，那么构造方法必须是 private。
  2）工具类不允许有 public 或 default 构造方法。
  3）类非 static 成员变量并且与子类共享，必须是 protected。
  4）类非 static 成员变量并且仅在本类使用，必须是 private。
  5）类 static 成员变量如果仅在本类使用，必须是 private。
  6）若是 static 成员变量，考虑是否为 final。
  7）类成员方法只供类内部调用，必须是 private。
  8）类成员方法只对继承类公开，那么限制为 protected。
  说明：任何类、方法、参数、变量，严控访问范围。过于宽泛的访问范围，不利于模块解耦。思考：如果是一个
  private 的方法，想删除就删除，可是一个 public 的 service 成员方法或成员变量，删除一下，不得手心冒点汗吗？
  变量像自己的小孩，尽量在自己的视线内，变量作用域太大，无限制的到处跑，那么你会担心的。
This commit is contained in:
Charles7c
2023-03-04 10:41:43 +08:00
parent 6da85463c9
commit 4779d77265
18 changed files with 174 additions and 201 deletions
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157
continew-admin-common/src/main/java/top/charles7c/cnadmin/common/base/BaseServiceImpl.java
View File

@@ -87,9 +87,18 @@ public abstract class BaseServiceImpl<M extends BaseMapper<T>, T, V, D, Q, C ext
@Autowired
protected M baseMapper;
protected Class<T> entityClass = currentEntityClass();
protected Class<V> voClass = currentVoClass();
protected Class<D> detailVoClass = currentDetailVoClass();
private final Class<T> entityClass;
private final Class<V> voClass;
private final Class<D> detailVoClass;
private final String entityIdName;
public BaseServiceImpl() {
this.entityClass = (Class<T>)ReflectionKit.getSuperClassGenericType(this.getClass(), BaseServiceImpl.class, 1);
this.voClass = (Class<V>)ReflectionKit.getSuperClassGenericType(this.getClass(), BaseServiceImpl.class, 2);
this.detailVoClass =
(Class<D>)ReflectionKit.getSuperClassGenericType(this.getClass(), BaseServiceImpl.class, 3);
this.entityIdName = this.currentEntityIdName();
}
@Override
public PageDataVO<V> page(Q query, PageQuery pageQuery) {
@@ -141,51 +150,6 @@ public abstract class BaseServiceImpl<M extends BaseMapper<T>, T, V, D, Q, C ext
return list;
}
@Override
public D get(Long id) {
T entity = this.getById(id);
D detailVO = BeanUtil.copyProperties(entity, detailVoClass);
this.fillDetail(detailVO);
return detailVO;
}
@Override
@Transactional(rollbackFor = Exception.class)
public Long add(C request) {
if (request == null) {
return 0L;
}
// 保存信息
T entity = BeanUtil.copyProperties(request, entityClass);
baseMapper.insert(entity);
TableInfo tableInfo = TableInfoHelper.getTableInfo(entityClass);
Object idValue = tableInfo.getPropertyValue(entity, this.currentEntityIdName());
return Convert.toLong(idValue);
}
@Override
@Transactional(rollbackFor = Exception.class)
public void update(C request) {
String idName = this.currentEntityIdName();
Object idValue = ReflectUtil.getFieldValue(request, idName);
T entity = this.getById(idValue);
BeanUtil.copyProperties(request, entity, CopyOptions.create().ignoreNullValue());
baseMapper.updateById(entity);
}
@Override
@Transactional(rollbackFor = Exception.class)
public void delete(List<Long> ids) {
baseMapper.deleteBatchIds(ids);
}
@Override
public void export(Q query, SortQuery sortQuery, HttpServletResponse response) {
List<D> list = this.list(query, sortQuery, detailVoClass);
list.forEach(this::fillDetail);
ExcelUtils.export(list, "导出数据", detailVoClass, response);
}
/**
* 查询列表
*
@@ -208,6 +172,50 @@ public abstract class BaseServiceImpl<M extends BaseMapper<T>, T, V, D, Q, C ext
return BeanUtil.copyToList(entityList, targetClass);
}
@Override
public D get(Long id) {
T entity = this.getById(id);
D detailVO = BeanUtil.copyProperties(entity, detailVoClass);
this.fillDetail(detailVO);
return detailVO;
}
@Override
@Transactional(rollbackFor = Exception.class)
public Long add(C request) {
if (request == null) {
return 0L;
}
// 保存信息
T entity = BeanUtil.copyProperties(request, entityClass);
baseMapper.insert(entity);
TableInfo tableInfo = TableInfoHelper.getTableInfo(entityClass);
Object idValue = tableInfo.getPropertyValue(entity, entityIdName);
return Convert.toLong(idValue);
}
@Override
@Transactional(rollbackFor = Exception.class)
public void update(C request) {
Object idValue = ReflectUtil.getFieldValue(request, entityIdName);
T entity = this.getById(idValue);
BeanUtil.copyProperties(request, entity, CopyOptions.create().ignoreNullValue());
baseMapper.updateById(entity);
}
@Override
@Transactional(rollbackFor = Exception.class)
public void delete(List<Long> ids) {
baseMapper.deleteBatchIds(ids);
}
@Override
public void export(Q query, SortQuery sortQuery, HttpServletResponse response) {
List<D> list = this.list(query, sortQuery, detailVoClass);
list.forEach(this::fillDetail);
ExcelUtils.export(list, "导出数据", detailVoClass, response);
}
/**
* 根据 ID 查询
*
@@ -259,46 +267,6 @@ public abstract class BaseServiceImpl<M extends BaseMapper<T>, T, V, D, Q, C ext
}
}
/**
* 获取实体类 ID 名称
*
* @return 实体类 ID 名称
*/
protected String currentEntityIdName() {
TableInfo tableInfo = TableInfoHelper.getTableInfo(entityClass);
Assert.notNull(tableInfo, "error: can not execute. because can not find cache of TableInfo for entity!");
String keyProperty = tableInfo.getKeyProperty();
Assert.notEmpty(keyProperty, "error: can not execute. because can not find column for id from entity!");
return keyProperty;
}
/**
* 获取实体类 Class 对象
*
* @return 实体类 Class 对象
*/
protected Class<T> currentEntityClass() {
return (Class<T>)ReflectionKit.getSuperClassGenericType(this.getClass(), BaseServiceImpl.class, 1);
}
/**
* 获取列表信息类 Class 对象
*
* @return 列表信息类 Class 对象
*/
protected Class<V> currentVoClass() {
return (Class<V>)ReflectionKit.getSuperClassGenericType(this.getClass(), BaseServiceImpl.class, 2);
}
/**
* 获取详情信息类 Class 对象
*
* @return 详情信息类 Class 对象
*/
protected Class<D> currentDetailVoClass() {
return (Class<D>)ReflectionKit.getSuperClassGenericType(this.getClass(), BaseServiceImpl.class, 3);
}
/**
* 链式查询
*
@@ -345,4 +313,17 @@ public abstract class BaseServiceImpl<M extends BaseMapper<T>, T, V, D, Q, C ext
protected LambdaUpdateChainWrapper<T> lambdaUpdate() {
return ChainWrappers.lambdaUpdateChain(baseMapper);
}
/**
* 获取实体类 ID 名称
*
* @return 实体类 ID 名称
*/
private String currentEntityIdName() {
TableInfo tableInfo = TableInfoHelper.getTableInfo(entityClass);
Assert.notNull(tableInfo, "error: can not execute. because can not find cache of TableInfo for entity!");
String keyProperty = tableInfo.getKeyProperty();
Assert.notEmpty(keyProperty, "error: can not execute. because can not find column for id from entity!");
return keyProperty;
}
}

2
continew-admin-common/src/main/java/top/charles7c/cnadmin/common/config/WebMvcMappingConfiguration.java
View File

@@ -41,7 +41,7 @@ public class WebMvcMappingConfiguration extends DelegatingWebMvcConfiguration {
* CRUD 请求映射器处理器映射器（覆盖默认 RequestMappingHandlerMapping）
*/
@Override
protected RequestMappingHandlerMapping createRequestMappingHandlerMapping() {
public RequestMappingHandlerMapping createRequestMappingHandlerMapping() {
return new CrudRequestMappingHandlerMapping();
}

34
continew-admin-common/src/main/java/top/charles7c/cnadmin/common/config/mybatis/MybatisPlusConfiguration.java
View File

@@ -46,7 +46,7 @@ public class MybatisPlusConfiguration {
* @return /
*/
@Bean
MybatisPlusInterceptor mybatisPlusInterceptor() {
public MybatisPlusInterceptor mybatisPlusInterceptor() {
MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
// 分页插件
interceptor.addInnerInterceptor(paginationInnerInterceptor());
@@ -55,6 +55,22 @@ public class MybatisPlusConfiguration {
return interceptor;
}
/**
* 元对象处理器配置（插入或修改时自动填充）
*/
@Bean
public MetaObjectHandler metaObjectHandler() {
return new MyBatisPlusMetaObjectHandler();
}
/**
* ID 生成器配置，仅在主键类型（idType）配置为 ASSIGN_ID 或 ASSIGN_UUID 时有效（使用网卡信息绑定雪花生成器，防止集群雪花 ID 重复）
*/
@Bean
public IdentifierGenerator idGenerator() {
return new DefaultIdentifierGenerator(NetUtil.getLocalhost());
}
/**
* 分页插件配置（<a href="https://baomidou.com/pages/97710a/#paginationinnerinterceptor">...</a>）
*/
@@ -68,20 +84,4 @@ public class MybatisPlusConfiguration {
paginationInnerInterceptor.setMaxLimit(-1L);
return paginationInnerInterceptor;
}
/**
* 元对象处理器配置（插入或修改时自动填充）
*/
@Bean
MetaObjectHandler metaObjectHandler() {
return new MyBatisPlusMetaObjectHandler();
}
/**
* ID 生成器配置，仅在主键类型（idType）配置为 ASSIGN_ID 或 ASSIGN_UUID 时有效（使用网卡信息绑定雪花生成器，防止集群雪花 ID 重复）
*/
@Bean
IdentifierGenerator idGenerator() {
return new DefaultIdentifierGenerator(NetUtil.getLocalhost());
}
}

1
continew-admin-common/src/main/java/top/charles7c/cnadmin/common/exception/BadRequestException.java
View File

@@ -30,5 +30,4 @@ public class BadRequestException extends RuntimeException {
public BadRequestException(String message) {
super(message);
}
}

1
continew-admin-common/src/main/java/top/charles7c/cnadmin/common/exception/ServiceException.java
View File

@@ -30,5 +30,4 @@ public class ServiceException extends RuntimeException {
public ServiceException(String message) {
super(message);
}
}

3
continew-admin-common/src/main/java/top/charles7c/cnadmin/common/handler/CrudRequestMappingHandlerMapping.java
View File

@@ -20,8 +20,6 @@ import static top.charles7c.cnadmin.common.annotation.CrudRequestMapping.Api;
import java.lang.reflect.Method;
import lombok.NoArgsConstructor;
import org.springframework.lang.NonNull;
import org.springframework.web.servlet.mvc.method.RequestMappingInfo;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
@@ -38,7 +36,6 @@ import top.charles7c.cnadmin.common.util.ExceptionUtils;
* @author Charles7c
* @since 2023/1/27 10:30
*/
@NoArgsConstructor
public class CrudRequestMappingHandlerMapping extends RequestMappingHandlerMapping {
@Override

28
continew-admin-common/src/main/java/top/charles7c/cnadmin/common/model/query/PageQuery.java
View File

@@ -76,20 +76,6 @@ public class PageQuery extends SortQuery {
this.setSize(size);
}
public void setPage(Integer page) {
this.page = page == null ? DEFAULT_PAGE : page;
}
public void setSize(Integer size) {
if (size == null) {
this.size = DEFAULT_SIZE;
} else if (size > DEFAULT_MAX_SIZE) {
this.size = DEFAULT_MAX_SIZE;
} else {
this.size = size;
}
}
/**
* 基于分页查询条件转换为 MyBatis Plus 分页条件
*
@@ -110,4 +96,18 @@ public class PageQuery extends SortQuery {
}
return mybatisPage;
}
public void setPage(Integer page) {
this.page = page == null ? DEFAULT_PAGE : page;
}
public void setSize(Integer size) {
if (size == null) {
this.size = DEFAULT_SIZE;
} else if (size > DEFAULT_MAX_SIZE) {
this.size = DEFAULT_MAX_SIZE;
} else {
this.size = size;
}
}
}

1
continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/FileUtils.java
View File

@@ -79,5 +79,4 @@ public class FileUtils {
}
return null;
}
}

8
continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/ServletUtils.java
View File

@@ -57,10 +57,6 @@ public class ServletUtils {
return getServletRequestAttributes().getResponse();
}
private static ServletRequestAttributes getServletRequestAttributes() {
return (ServletRequestAttributes)Objects.requireNonNull(RequestContextHolder.getRequestAttributes());
}
/**
* 获取浏览器及其版本信息
*
@@ -75,4 +71,8 @@ public class ServletUtils {
UserAgent userAgent = UserAgentUtil.parse(request.getHeader("User-Agent"));
return userAgent.getBrowser().getName() + " " + userAgent.getVersion();
}
private static ServletRequestAttributes getServletRequestAttributes() {
return (ServletRequestAttributes)Objects.requireNonNull(RequestContextHolder.getRequestAttributes());
}
}

2
continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/validate/CheckUtils.java
View File

@@ -25,8 +25,8 @@ import top.charles7c.cnadmin.common.exception.ServiceException;
/**
* 业务参数校验工具类（抛出 500 ServiceException）
*
* @author Charles7c
* @see ServiceException
* @author Charles7c
* @since 2023/1/2 22:12
*/
@Slf4j

2
continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/validate/ValidationUtils.java
View File

@@ -25,9 +25,9 @@ import top.charles7c.cnadmin.common.exception.BadRequestException;
/**
* 基本参数校验工具类（抛出 400 BadRequestException）
*
* @see BadRequestException
* @author Charles7c
* @since 2022/12/21 20:56
* @see BadRequestException
*/
@Slf4j
@NoArgsConstructor(access = AccessLevel.PRIVATE)

1
continew-admin-system/src/main/java/top/charles7c/cnadmin/auth/service/LoginService.java
View File

@@ -34,5 +34,4 @@ public interface LoginService {
* @return 令牌
*/
String login(String username, String password);
}

18
continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/UserService.java
View File

@@ -36,15 +36,6 @@ import top.charles7c.cnadmin.system.model.vo.UserVO;
*/
public interface UserService extends BaseService<UserVO, UserDetailVO, UserQuery, UserRequest> {
/**
* 根据用户名查询
*
* @param username
* 用户名
* @return 用户信息
*/
UserDO getByUsername(String username);
/**
* 上传头像
*
@@ -98,6 +89,15 @@ public interface UserService extends BaseService<UserVO, UserDetailVO, UserQuery
*/
void updateUserRole(UpdateUserRoleRequest request, Long userId);
/**
* 根据用户名查询
*
* @param username
* 用户名
* @return 用户信息
*/
UserDO getByUsername(String username);
/**
* 根据部门 ID 列表查询
*

18
continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/DeptServiceImpl.java
View File

@@ -82,6 +82,15 @@ public class DeptServiceImpl extends BaseServiceImpl<DeptMapper, DeptDO, DeptVO,
super.lambdaUpdate().in(DeptDO::getParentId, ids).remove();
}
@Override
public void fillDetail(Object detailObj) {
super.fillDetail(detailObj);
if (detailObj instanceof DeptDetailVO) {
DeptDetailVO detailVO = (DeptDetailVO)detailObj;
detailVO.setParentName(ExceptionUtils.exToNull(() -> this.get(detailVO.getParentId()).getDeptName()));
}
}
/**
* 检查名称是否存在
*
@@ -97,13 +106,4 @@ public class DeptServiceImpl extends BaseServiceImpl<DeptMapper, DeptDO, DeptVO,
return super.lambdaQuery().eq(DeptDO::getDeptName, name).eq(DeptDO::getParentId, parentId)
.ne(id != null, DeptDO::getDeptId, id).exists();
}
@Override
public void fillDetail(Object detailObj) {
super.fillDetail(detailObj);
if (detailObj instanceof DeptDetailVO) {
DeptDetailVO detailVO = (DeptDetailVO)detailObj;
detailVO.setParentName(ExceptionUtils.exToNull(() -> this.get(detailVO.getParentId()).getDeptName()));
}
}
}

10
continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/MenuServiceImpl.java
View File

@@ -74,6 +74,11 @@ public class MenuServiceImpl extends BaseServiceImpl<MenuMapper, MenuDO, MenuVO,
super.lambdaUpdate().in(MenuDO::getParentId, ids).remove();
}
@Override
public Set<String> listPermissionsByUserId(Long userId) {
return baseMapper.selectPermissionsByUserId(userId);
}
/**
* 检查名称是否存在
*
@@ -89,9 +94,4 @@ public class MenuServiceImpl extends BaseServiceImpl<MenuMapper, MenuDO, MenuVO,
return super.lambdaQuery().eq(MenuDO::getMenuName, name).eq(MenuDO::getParentId, parentId)
.ne(id != null, MenuDO::getMenuId, id).exists();
}
@Override
public Set<String> listPermissionsByUserId(Long userId) {
return baseMapper.selectPermissionsByUserId(userId);
}
}

52
continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/RoleServiceImpl.java
View File

@@ -104,32 +104,6 @@ public class RoleServiceImpl extends BaseServiceImpl<RoleMapper, RoleDO, RoleVO,
super.delete(ids);
}
/**
* 检查名称是否存在
*
* @param name
* 名称
* @param id
* ID
* @return 是否存在
*/
private boolean checkNameExists(String name, Long id) {
return super.lambdaQuery().eq(RoleDO::getRoleName, name).ne(id != null, RoleDO::getRoleId, id).exists();
}
/**
* 检查编码是否存在
*
* @param code
* 编码
* @param id
* ID
* @return 是否存在
*/
private boolean checkCodeExists(String code, Long id) {
return super.lambdaQuery().eq(RoleDO::getRoleCode, code).ne(id != null, RoleDO::getRoleId, id).exists();
}
@Override
public void fillDetail(Object detailObj) {
super.fillDetail(detailObj);
@@ -167,4 +141,30 @@ public class RoleServiceImpl extends BaseServiceImpl<RoleMapper, RoleDO, RoleVO,
List<RoleDO> roleList = super.lambdaQuery().select(RoleDO::getRoleCode).in(RoleDO::getRoleId, roleIds).list();
return roleList.stream().map(RoleDO::getRoleCode).collect(Collectors.toSet());
}
/**
* 检查名称是否存在
*
* @param name
* 名称
* @param id
* ID
* @return 是否存在
*/
private boolean checkNameExists(String name, Long id) {
return super.lambdaQuery().eq(RoleDO::getRoleName, name).ne(id != null, RoleDO::getRoleId, id).exists();
}
/**
* 检查编码是否存在
*
* @param code
* 编码
* @param id
* ID
* @return 是否存在
*/
private boolean checkCodeExists(String code, Long id) {
return super.lambdaQuery().eq(RoleDO::getRoleCode, code).ne(id != null, RoleDO::getRoleId, id).exists();
}
}

36
continew-admin-system/src/main/java/top/charles7c/cnadmin/system/service/impl/UserServiceImpl.java
View File

@@ -102,19 +102,6 @@ public class UserServiceImpl extends BaseServiceImpl<UserMapper, UserDO, UserVO,
userRoleService.save(request.getRoleIds(), userId);
}
/**
* 检查名称是否存在
*
* @param name
* 名称
* @param id
* ID
* @return 是否存在
*/
private boolean checkNameExists(String name, Long id) {
return super.lambdaQuery().eq(UserDO::getUsername, name).ne(id != null, UserDO::getUserId, id).exists();
}
@Override
public void fillDetail(Object detailObj) {
super.fillDetail(detailObj);
@@ -127,11 +114,6 @@ public class UserServiceImpl extends BaseServiceImpl<UserMapper, UserDO, UserVO,
}
}
@Override
public UserDO getByUsername(String username) {
return super.lambdaQuery().eq(UserDO::getUsername, username).one();
}
@Override
@Transactional(rollbackFor = Exception.class)
public String uploadAvatar(MultipartFile avatarFile, Long userId) {
@@ -218,6 +200,11 @@ public class UserServiceImpl extends BaseServiceImpl<UserMapper, UserDO, UserVO,
userRoleService.save(request.getRoleIds(), userId);
}
@Override
public UserDO getByUsername(String username) {
return super.lambdaQuery().eq(UserDO::getUsername, username).one();
}
@Override
public Long countByDeptIds(List<Long> deptIds) {
return super.lambdaQuery().in(UserDO::getDeptId, deptIds).count();
@@ -227,4 +214,17 @@ public class UserServiceImpl extends BaseServiceImpl<UserMapper, UserDO, UserVO,
public String getNicknameById(Long userId) {
return super.getById(userId).getNickname();
}
/**
* 检查名称是否存在
*
* @param name
* 名称
* @param id
* ID
* @return 是否存在
*/
private boolean checkNameExists(String name, Long id) {
return super.lambdaQuery().eq(UserDO::getUsername, name).ne(id != null, UserDO::getUserId, id).exists();
}
}

1
continew-admin-webapi/src/test/java/top/charles7c/ContinewAdminApplicationTests.java
View File

@@ -24,5 +24,4 @@ class ContinewAdminApplicationTests {
@Test
void contextLoads() {}
}