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如何使用CSS创建圆角边框效果

CSS可以创建各种各样的边框效果,圆角边框是其中一种。在本文中,我们将深入探讨如何使用CSS创建圆角边框效果,并为您提供详细的代码示例。

一、使用border-radius属性创建圆角边框

CSS提供了border-radius属性,可以用来创建圆角边框效果。该属性可以应用于所有四个角,也可以应用于单个角。 首先,我们来看如何应用于所有四个角。以下代码示例演示了如何将一个html元素的边框变成圆角矩形:
.rounded {
  border: 2px solid #ccc;
  border-radius: 10px;
  padding: 10px;
}
在上面的代码中,我们创建了一个名为.rounded的CSS类,并为边框和内边距设置了属性值。border-radius属性设置了所有四个角的半径为10px,从而创建了圆角矩形边框。 接下来,我们看一下如何将这个属性应用于单个角。以下代码示例演示了如何使用border-top-left-radius,border-top-right-radius,border-bottom-left-radius和border-bottom-right-radius属性分别为元素的不同角设置圆角:
.rounded-corner {
  border: 2px solid #ccc;
  border-top-left-radius: 10px;
  border-top-right-radius: 20px;
  border-bottom-right-radius: 30px;
  border-bottom-left-radius: 40px;
  padding: 10px;
}
在上面的代码中,我们为不同的角设置了不同的半径值,从而创建了各种不同形状的圆角边框。

二、使用box-shadow属性创建圆角边框

除了使用border-radius属性,还可以使用box-shadow属性创建圆角边框。以下代码示例演示了如何使用box-shadow属性来创建圆角边框:
.rounded-box {
  box-shadow: 0 0 0 10px #ccc;
  border-radius: 10px;
  padding: 10px;
}
在上面的代码中,我们创建了一个名为.rounded-box的CSS类,并使用box-shadow属性为元素设置边框。box-shadow属性的第一个参数是水平偏移量,第二个参数是垂直偏移量,第三个参数是模糊半径,第四个参数是阴影颜色。 值得注意的是,使用box-shadow属性创建的圆角边框不会影响元素的尺寸,因此您需要自行调整元素的尺寸和位置。

三、使用border-image属性创建圆角边框

最后,我们来看一下如何使用border-image属性创建圆角边框。 border-image属性允许您使用图像来定义元素的边框。以下代码示例演示了如何使用border-image属性为元素创建圆角边框:
.rounded-image {
  border: 10px solid transparent;
  padding: 10px;
  border-image: url("border.png") 30 round;
}
在上面的代码中,我们首先创建了一个有透明边框的元素,然后使用border-image属性将边框替换为名为border.png的图像。第二个参数设置了边框的宽度,第三个参数设置了边框的模式。

结论

在本文中,我们深入探讨了如何使用CSS创建圆角边框效果,包括使用border-radius属性、box-shadow属性和border-image属性。每个属性都具有不同的优点和适用场景,您可以根据需要选择相应的属性来创建圆角边框效果。 完整代码示例:
.rounded {
  border: 2px solid #ccc;
  border-radius: 10px;
  padding: 10px;
}

.rounded-corner {
  border: 2px solid #ccc;
  border-top-left-radius: 10px;
  border-top-right-radius: 20px;
  border-bottom-right-radius: 30px;
  border-bottom-left-radius: 40px;
  padding: 10px;
}

.rounded-box {
  box-shadow: 0 0 0 10px #ccc;
  border-radius: 10px;
  padding: 10px;
}

.rounded-image {
  border: 10px solid transparent;
  padding: 10px;
  border-image: url("border.png") 30 round;
}
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when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: ${item.id} [in template "article/detail/index.ftl" at line 48, column 106] ---- Java stack trace (for programmers): ---- freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) at freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:481) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:401) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:370) at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:104) at freemarker.core.DollarVariable.accept(DollarVariable.java:63) at freemarker.core.Environment.visit(Environment.java:371) at freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:321) at freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271) at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:244) at freemarker.core.Environment.visitIteratorBlock(Environment.java:645) at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:108) at freemarker.core.IteratorBlock.accept(IteratorBlock.java:94) at freemarker.core.Environment.visit(Environment.java:335) at freemarker.core.Environment.visit(Environment.java:341) at freemarker.core.Environment.visit(Environment.java:341) at freemarker.core.Environment.process(Environment.java:314) at freemarker.template.Template.process(Template.java:383) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:332) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:266) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:220) at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:181) at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314) at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1431) at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1167) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1106) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at com.software.filter.HttpSpiderIdentifyFilter.doFilter(HttpSpiderIdentifyFilter.java:51) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at java.base/java.lang.VirtualThread.run(VirtualThread.java:309)