jc-club一期项目

Preconditions参数校验

导入guava依赖

<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>19.0</version>
</dependency>

开始使用

import com.google.common.base.Preconditions;
import org.springframework.util.StringUtils;

...

@RestController
@RequestMapping("/subject/category")
@Slf4j
public class SubjectCategoryController {

    @Resource
    private SubjectCategoryDomainService subjectCategoryDomainService;


    @PostMapping("/add")
    public Result<Boolean> add(@RequestBody SubjectCategoryDTO subjectCategoryDTO){

        try{
            if (log.isInfoEnabled()){
                log.info("SubjectCategoryController.add.dto:{}", JSON.toJSONString(subjectCategoryDTO));
            }


            Preconditions.checkNotNull(subjectCategoryDTO.getCategoryType(),"分类类型不能为空");
            Preconditions.checkArgument(StringUtils.isEmpty(subjectCategoryDTO.getCategoryName()),"分类名称不能为空");
            Preconditions.checkNotNull(subjectCategoryDTO.getParentId(),"分类父级ID不能为空");


            SubjectCategoryBO subjectCategoryBO = SubjectCatrgoryDTOConverter.INSTANCE.convertBoToCategory(subjectCategoryDTO);
            subjectCategoryDomainService.add(subjectCategoryBO);
            return Result.ok(true);
        }catch (Exception e){
            return Result.fail();
        }

    }

}