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如何让文本在CSS中垂直居中?

一、使用display:flex

要让文本在CSS中垂直居中,最常见的方法是使用display:flex。这个方法可以让元素以弹性布局的方式显示内容,从而实现垂直居中。

.container{
    display: flex;
    align-items: center;
}

上面的代码中,.container就是我们要垂直居中的元素的父级元素。align-items属性可以控制其子元素在纵向上的对齐方式,通过设置为center,就可以让其垂直居中。

需要注意的是,display:flex并不是所有浏览器都支持,可以在样式中加入-webkit-box等属性以增加兼容性。

二、使用vertical-align

在CSS中,vertical-align属性可以控制元素在纵向上的对齐方式。但是有时候为了让它起作用,需要将其作用的元素的display属性设置为table-cell。

.container{
   display: table-cell;
   vertical-align: middle;
}

这样,元素就会在纵向上垂直居中。需要注意的是,这个方法只适用于元素的高度已知的情况。

三、使用line-height

在CSS中,line-height属性可以控制文本的行高,从而使其在纵向上垂直居中。这个方法适用于单行文本和行高已知的情况。

.container{
   line-height: 50px;
}

上面的代码中,50px就是文本的行高。通过将行高设置为和元素的高度相等,就可以使得文本在纵向上垂直居中。

四、使用translate

另一种垂直居中的方法是使用CSS3的translate属性。

.container{
   position: absolute;
   top: 50%;
   transform: translateY(-50%);
}

上面的代码中,position: absolute可以使得元素定位,top: 50%可以将其向上移动50%,而transform: translateY(-50%)则可以将其上移动自身高度的一半,从而达到垂直居中的效果。

五、使用flexbox对齐技巧

除了使用display:flex,我们还可以用flexbox的对齐技巧来实现垂直居中。

.container{
   display: flex;
}
.text{
   margin: auto 0;
}

上面的代码中,我们可以将margin设置成auto 0,这样就可以在子元素中将其与父级元素的空间平均分配,从而实现垂直居中的效果。

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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)