doThrow()和之间有什么区别thenThrow()?
假设我们想要模拟身份验证服务来验证用户的登录凭据.如果我们要模拟异常,以下两行之间的区别是什么?
doThrow(new BadCredentialsException("Wrong username/password!")).when(authenticationService).login("user1", "pass1");
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VS
when(authenticationService.login("user1", "pass1")).thenThrow(new BadCredentialsException("Wrong username/password!"));
Run Code Online (Sandbox Code Playgroud) 我是GWT的新手.我正在编写一个简单的GWT程序,我需要使用一个组合框,我使用了一个实例ValueListBox.在那个组合中,我需要列出1到12之间的数字,代表一年中的几个月.但是这个组合null最后增加了价值.任何人都可以帮我如何删除该null值?
final ValueListBox<Integer> monthCombo = new ValueListBox<Integer>(new Renderer<Integer>() {
@Override
public String render(Integer object) {
return String.valueOf(object);
}
@Override
public void render(Integer object, Appendable appendable) throws IOException {
if (object != null) {
String value = render(object);
appendable.append(value);
}
}
});
monthCombo.setAcceptableValues(getMonthList());
monthCombo.setValue(1);
private List<Integer> getMonthList() {
List<Integer> list = new ArrayList<Integer>();
for (int i = 1; i <= 12; i++) {
list.add(i);
}
return list;
}
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我正在使用角度5,我收到控制台错误:
无法绑定到'ngValue',因为它不是'mat-option'的已知属性
我的模板看起来如下所示:
<mat-select placeholder="Select Book" name="patient" [(ngModel)]="selectedBook">
<mat-option *ngFor="let eachBook of books" [ngValue]="eachBook">{{eachBook.name}}</mat-option>
</mat-select>
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我已经导入了两个MatSelectModule和MatOptionModule.
我们怎么解决这个问题?
我开始在 Vue 3 中::v-deep使用以下警告。
::v-deep usage as a combinator has been deprecated. Use ::v-deep(<inner-selector>) instead
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CSS 如下所示:
.parent ::v-deep .child {
...
}
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使用建议选项的正确方法是::v-deep(<inner-selector>)什么?
我是新来的WireMock. 我将WireMock服务器作为独立进程运行。我可以通过配置/mappings文件夹下的 json 文件来模拟简单的 REST API。现在,我想模拟一个文件下载端点。我怎样才能做到这一点?
我不知道它是否有帮助,终点是在 Java/Spring 中,如下所示:
@RequestMapping(value = "xxx/get", method = {RequestMethod.GET})
public ResponseEntity<Object> getFile(HttpServletResponse response) throws Exception {
final Resource fileResource = fileResourceFactoryBean.getObject();
if (fileResource.exists()) {
try (InputStream inputStream = fileResource.getInputStream()) {
IOUtils.copy(inputStream, response.getOutputStream());
response.setContentType("application/octet-stream");
response.setHeader("Content-Disposition", "attachment; filename=" + fileResource.getFilename());
response.flushBuffer();
inputStream.close();
return new ResponseEntity<>(HttpStatus.OK);
} catch (Exception e) {
LOGGER.error("Error reading file: ", e);
return new ResponseEntity<Object>("Error reading file.", HttpStatus.BAD_REQUEST);
}
}
return new ResponseEntity<Object>(fileResource.getFilename() + " not found.", …Run Code Online (Sandbox Code Playgroud) 我需要将速度字符串数组传递给 JavaScript 函数。因此,为此,我想将速度数组转换为 JavaScript 数组。
源代码如下所示:
String[] arrStr[] = new String[3];
arrStr[0] = "String 1";
arrStr[1] = "String 2";
arrStr[2] = "String 3";
request.setAttribute("a", arrStr);
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在我的 HTML 模板中,
#set ( #arr = $request.getAttribute("a"))
<script language="javascript">
var newArr = "${arr}";
</script>
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但字符串数组不会复制到 newArr。谁能帮我解决这个问题?
假设<select>表单中有许多元素.我需要一个选择器来选择一个<select>元素,其选择的选项具有特定的文本.为了解释,假设有5个<select>"颜色"类的元素.他们每个人都有3个<option>文本"白色","黑色","绿色".现在我需要选择所选选项为"白色"的元素.
<select class="color" >
<option value=""></option>
<option value="1"> white </option>
<option value="2"> black </option>
<option value="2"> green </option>
</select>
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在如下图所示的场景中,我需要选择那两个白色<select>.

谢谢.
[ngSwitch]和一堆*ngIfs 有什么区别。我们应该关注任何性能因素吗?
* ngIf
<div *ngIf="day === 'MONDAY'">
Keep calm and pretend it's not Monday.
</div>
...
<div *ngIf="day === 'FRIDAY'">
Happy Friday!
</div>
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[ngSwitch]
<ng-container [ngSwitch]="day">
<div *ngSwitchCase="'MONDAY'">
Keep calm and pretend it's not Monday.
</div>
...
<div *ngSwitchCase="'FRIDAY'">
Happy Friday!
</div>
</ng-container>
Run Code Online (Sandbox Code Playgroud) spring boot我有一个文件上传 api,在该版本下工作得很好2.1.13。版本升级到 后2.5.2,开始抛出异常。查看更改日志,我看不到任何与处理相关的重大更改Multipart。我在这里可能会缺少什么?以下是我的示例代码。
例外
org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'file' is not present
at org.springframework.web.servlet.mvc.method.annotation.RequestPartMethodArgumentResolver.resolveArgument(RequestPartMethodArgumentResolver.java:161) ~[spring-webmvc-5.3.8.jar:5.3.8]
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) ~[spring-web-5.3.8.jar:5.3.8]
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:170) ~[spring-web-5.3.8.jar:5.3.8]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) ~[spring-web-5.3.8.jar:5.3.8]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.3.8.jar:5.3.8]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.3.8.jar:5.3.8]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.8.jar:5.3.8]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.8.jar:5.3.8]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063) ~[spring-webmvc-5.3.8.jar:5.3.8]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.8.jar:5.3.8]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) [spring-webmvc-5.3.8.jar:5.3.8]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) [spring-webmvc-5.3.8.jar:5.3.8]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) [tomcat-embed-core-9.0.48.jar:4.0.FR]
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应用程序属性
spring.servlet.multipart.enabled=true
spring.servlet.multipart.max-file-size=20MB
spring.servlet.multipart.max-request-size=20MB
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控制器端点
@PostMapping(
value = "/upload",
consumes = MediaType.MULTIPART_FORM_DATA_VALUE,
produces = MediaType.APPLICATION_JSON_VALUE
)
public ResponseEntity<Object> uploadFile(@RequestPart("file") MultipartFile file) …Run Code Online (Sandbox Code Playgroud) spring file-upload multipartform-data spring-mvc spring-boot
我正在Spring MVC使用TestNG和进行单元测试控制器Mockito.我Hamcrest在Maven依赖项中包含了库,如下所示.我在这里错过了什么?当我使用以下两种方法时出现错误:
org.hamcrest.Matchers.hasSize;
org.hamcrest.Matchers.is;
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以下是我的依赖项:
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.9.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>1.10.8</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-library</artifactId>
<version>1.3</version>
<scope>test</scope>
</dependency>
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更新1:
通过更改hamcrest-library为已解决问题hamcrest-all.
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-all</artifactId>
<version>1.3</version>
<scope>test</scope>
</dependency>
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更新2:
根据Tunaki的建议,更好的解决方案是hamcrest-core从mockito库中排除传递依赖.所以最终的依赖关系应如下所示:
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>1.10.8</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-library</artifactId>
<version>1.3</version>
<scope>test</scope>
</dependency>
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