小编Sau*_*mar的帖子

我有一个抽象的课.我想通过另一个抽象类扩展抽象类,然后实现扩展的抽象类.是否可能.如果是的话,对于OOPS来说,这是否是一个好的方法？

 try {
 } catch() {}
 finally {
     try {
     } catch() { }
     finally { }
 }

拥有上面的代码是好的吗？

我可以声明这样的事吗？

static volatile boolean first=false;

鉴于:

    <ul id="myList" class="list-group">
      <li>Remove Me 1</li>
      <li>Remove Me 2</li>
      <li>Remove Me 3</li>
    </ul>

我想从父级ul中删除所有li子项,以便当我这样做时:

    $("#myList").append("<li>New li 1</li>");

我结束了

    <ul id="myList" class="list-group">
      <li>New li 1</li>
    </ul>

代替:

    <ul id="myList" class="list-group">
      <li>Remove Me 1</li>
      <li>Remove Me 2</li>
      <li>Remove Me 3</li>
      <li>New li 1</li>
    </ul>

的Number子类包裹原始数值类型(Byte,Integer,Double,Float,Long,和Short).

他们的目的是什么？

我有以下配置

组态

@Configuration
@EnableMongoRepositories(basePackages = Constants.DATA_SCAN)
@EnableMongoAuditing(auditorAwareRef = "auditorAwareService")
@Import(value = MongoAutoConfiguration.class)
public class DatabaseConfiguration {

    @Bean
    public ValidatingMongoEventListener validatingMongoEventListener() {
        return new ValidatingMongoEventListener(validator());
    }

    @Bean
    public LocalValidatorFactoryBean validator() {
        return new LocalValidatorFactoryBean();
    }

    @Bean
    public CustomConversions customConversions() {
        final List<Converter<?, ?>> converters = new ArrayList<>();
        converters.add(DateToZonedDateTimeConverter.INSTANCE);
        converters.add(ZonedDateTimeToDateConverter.INSTANCE);
        return new CustomConversions(converters);
    }
}

我添加了自定义转换器,但我仍然得到:

在实体类java.time.ZonedDateTime上找不到属性null以将构造函数参数绑定到!

@Document(collection = "user")
public class User implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    private String id;

    @Field("reset_date")
    private ZonedDateTime resetDate = …

我有以下路由配置,但我收到错误 Invalid configuration of route 'tenant': redirectTo and children cannot be used together

一旦我点击/租户,我想以某种方式显示两个租户的内容,然后审计？这可能吗 ？我的租户网址如下所示http://localhost:8080/#/tenant

{
    path: 'tenant',
    redirectTo: '/tenant/(view:audit)', 
    pathMatch: 'full',
    component: TenantComponent,
    data: {
        authorities: ['ROLE_USER', 'ROLE_ADMIN'],
        pageTitle: 'tenant.home.title'
    },
    children: [
        {
            path: 'audit',
            component: PacketDataComponent,
            data: {
                authorities: ['ROLE_USER', 'ROLE_ADMIN'],
                pageTitle: 'tenant.home.title'
            },
        }
    ]
}

在ParentComponent =>中

ExpressionChangedAfterItHasBeenCheckedError: Expression has changed after it was checked. Previous value: ''. Current value: '[object Object]'.
            at viewDebugError (vendor.bundle.js:8962)
            at expressionChangedAfterItHasBeenCheckedError (vendor.bundle.js:8940)

父组件Html

<div>
  <app-child-widget [allItems]="allItems" (notify)="eventCalled($event)"></app-child-widget>
<div>

父组件

export class ParentComponent implements OnInit {

  returnedItems: Array<any> = [];
  allItems: Array<any> = [];

  constructor(
  ) { }

  ngOnInit() {
     this.allItems = // load from server...
  }

  eventCalled(items: Array<any>): void {
    this.returnedItems = items;
  }
}

儿童组件

@Component({
  selector: 'app-child-widget',
  templateUrl: 'child.component.html',
  styleUrls: ['./child.component.css']
})
export class ChildComponent implements OnInit …

我有以下HTML

<div id="myModal" class="modal hide fade" tabindex="-1" role="dialog"
aria-labelledby="myModalLabel" aria-hidden="true">
    <div class="modal-body">
        <table>
            <tbody>
                <tr>
                    <td>
                        <div class="span2 fileupload fileupload-new pull-left" data-provides="fileupload">
                            <div class="fileupload-preview thumbnail" style="width: 200px; height: 150px;"></div>
                            <div> <span class="btn btn-file"><span class="fileupload-new">Select image</span>
                                <span
                                class="fileupload-exists">Change</span>
                                    <input type="file" />
                                    </span> <a href="#" class="btn fileupload-exists" data-dismiss="fileupload">Remove</a>

                            </div>
                        </div>
                    </td>
                    <td>
                        <div class="progress">
                            <div class="bar" style="width: 60%;"></div>
                        </div>
                        <button class="btn btn-mini" type="button">Upload</button>
                    </td>
                </tr>
            </tbody>
        </table>
    </div>
    <div class="modal-footer">
        <button class="btn btn-primary" data-dismiss="modal" aria-hidden="true">Close</button>
    </div>

</div>

调节器

    @RequestMapping(value = "/graphs", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
    public Collection<Graph> getSkeletonGraph()
    {
        log.debug("REST request to get current graphs");
        return graphService.getSkeletonGraphs();
    }

角度呼叫

    $scope.graphs = [];
    Graph.getGraphs().$promise.then(function(result)
    {
        $scope.graphs = result;
    });



    angular.module('sampleApplicationApp').factory('Graph', function($resource)
     {
      return {
        getGraphs: function() {
           return    $resource('api/graphs/:id').query();
      }
     };
    })

我不知道为什么使用过滤器我得到了例外.

也看了角度文档https://docs.angularjs.org/error/filter/notarray 我的结果是数组,但不知道为什么我得到这样的异常.

来自后端的示例结果我得到了.

[{"id":"135520b0-9e4b-11e5-a67e-5668957d0149","area":"Bingo","models":[],"enumerateds":[]},{"id":"0db925e0-9e53-11e5-a67e-5668957d0149","area":"jin","models":[],"enumerateds":[]},{"id":"7a717330-9788-11e5-b259-5668957d0149","area":"Product","models":[],"enumerateds":[]},{"id":"402d4c30-980f-11e5-a2a3-5668957d0149","area":"fgfgfg","models":[],"enumerateds":[]},{"id":"404b77b0-9e53-11e5-a67e-5668957d0149","area":"olah","models":[],"enumerateds":[]},{"id":"cd071b10-9e52-11e5-a67e-5668957d0149","area":"lolo","models":[],"enumerateds":[]},{"id":"d9808e60-9710-11e5-b112-5668957d0149","area":"catalog","models":[],"enumerateds":[]},{"id":"2aaca9f0-97e2-11e5-91cd-5668957d0149","area":"btg","models":[],"enumerateds":[]},{"id":"955e9ed0-978c-11e5-93fd-5668957d0149","area":"promotions","models":[],"enumerateds":[]},{"id":"1e441d60-980f-11e5-a2a3-5668957d0149","area":"hjuhh","models":[],"enumerateds":[]},{"id":"fb96dfe0-978d-11e5-93fd-5668957d0149","area":"voucher","models":[],"enumerateds":[]}]

HTML

<li ng-repeat="g in graphs track by $index | filter:searchText"></li>