struts2中simple主題下<s:fieldError>標簽默認樣式的移除方法

更新時間：2018年10月11日 08:40:54 作者：努力學習的IT萌新

這篇文章主要給大家介紹了關(guān)于struts2中simple主題下<s:fieldError>標簽默認樣式的移除方法，文中通過示例代碼介紹的非常詳細，需要的朋友可以參考借鑒，下面隨著小編來一起學習學習吧

前言

當在我們注冊用戶時，如果給前臺的提示是用戶名重復并且用戶名太長時，就會要往action里面添加多個errors，這時到前臺怎么把它依次拿出來

下面話不多說了，來一起看看詳細的介紹吧

方法如下

①找到配置文件

struts2-core-2.3.35.jar/template/simple/fielderror.ftl（不同版本的文件路徑大同小異）

②創(chuàng)建新的文件包并拷貝文件

在項目根目錄下創(chuàng)建template.simple并將fielderror.ftl拷貝過來

此時根目錄下的fielderror.ftl文件優(yōu)先權(quán)大于默認的fielderror.ftl文件

③修改拷貝過來的fielderror.ftl文件

修改前文件如下

<#--
/*
 * $Id$
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
-->
<#if fieldErrors??><#t/>
 <#assign eKeys = fieldErrors.keySet()><#t/>
 <#assign eKeysSize = eKeys.size()><#t/>
 <#assign doneStartUlTag=false><#t/>
 <#assign doneEndUlTag=false><#t/>
 <#assign haveMatchedErrorField=false><#t/>
 <#if (fieldErrorFieldNames?size > 0) ><#t/>
  <#list fieldErrorFieldNames as fieldErrorFieldName><#t/>
   <#list eKeys as eKey><#t/>
    <#if (eKey = fieldErrorFieldName)><#t/>
     <#assign haveMatchedErrorField=true><#t/>
     <#assign eValue = fieldErrors[fieldErrorFieldName]><#t/>
     <#if (haveMatchedErrorField && (!doneStartUlTag))><#t/>
     <ul<#rt/>
      <#if parameters.id?has_content>
        id="${parameters.id?html}"<#rt/>
      </#if>
      <#if parameters.cssClass?has_content>
        class="${parameters.cssClass?html}"<#rt/>
       <#else>
        class="errorMessage"<#rt/>
      </#if>
      <#if parameters.cssStyle?has_content>
        style="${parameters.cssStyle?html}"<#rt/>
      </#if>
       >
      <#assign doneStartUlTag=true><#t/>
     </#if><#t/>
     <#list eValue as eEachValue><#t/>
      <li><span><#if parameters.escape>${eEachValue!?html}<#else>${eEachValue!}</#if></span></li>
     </#list><#t/>
    </#if><#t/>
   </#list><#t/>
  </#list><#t/>
  <#if (haveMatchedErrorField && (!doneEndUlTag))><#t/>
  </ul>
   <#assign doneEndUlTag=true><#t/>
  </#if><#t/>
  <#else><#t/>
  <#if (eKeysSize > 0)><#t/>
  <ul<#rt/>
   <#if parameters.cssClass?has_content>
     class="${parameters.cssClass?html}"<#rt/>
    <#else>
     class="errorMessage"<#rt/>
   </#if>
   <#if parameters.cssStyle?has_content>
     style="${parameters.cssStyle?html}"<#rt/>
   </#if>
    >
   <#list eKeys as eKey><#t/>
    <#assign eValue = fieldErrors[eKey]><#t/>
    <#list eValue as eEachValue><#t/>
     <li><span><#if parameters.escape>${eEachValue!?html}<#else>${eEachValue!}</#if></span></li>
    </#list><#t/>
   </#list><#t/>
  </ul>
  </#if><#t/>
 </#if><#t/>
</#if><#t/>

將<ul></ul>、<li></li>、<span></span>刪除

修改后文件如下

<#--
/*
 * $Id$
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
-->
<#if fieldErrors??><#t/>
 <#assign eKeys = fieldErrors.keySet()><#t/>
 <#assign eKeysSize = eKeys.size()><#t/>
 <#assign doneStartUlTag=false><#t/>
 <#assign doneEndUlTag=false><#t/>
 <#assign haveMatchedErrorField=false><#t/>
 <#if (fieldErrorFieldNames?size > 0) ><#t/>
  <#list fieldErrorFieldNames as fieldErrorFieldName><#t/>
   <#list eKeys as eKey><#t/>
    <#if (eKey = fieldErrorFieldName)><#t/>
     <#assign haveMatchedErrorField=true><#t/>
     <#assign eValue = fieldErrors[fieldErrorFieldName]><#t/>
     <#if (haveMatchedErrorField && (!doneStartUlTag))><#t/>
     
      <#assign doneStartUlTag=true><#t/>
     </#if><#t/>
     <#list eValue as eEachValue><#t/>
      <#if parameters.escape>${eEachValue!?html}<#else>${eEachValue!}</#if>
     </#list><#t/>
    </#if><#t/>
   </#list><#t/>
  </#list><#t/>
  <#if (haveMatchedErrorField && (!doneEndUlTag))><#t/>
  
   <#assign doneEndUlTag=true><#t/>
  </#if><#t/>
  <#else><#t/>
  <#if (eKeysSize > 0)><#t/>
  
   <#list eKeys as eKey><#t/>
    <#assign eValue = fieldErrors[eKey]><#t/>
    <#list eValue as eEachValue><#t/>
     <#if parameters.escape>${eEachValue!?html}<#else>${eEachValue!}</#if>
    </#list><#t/>
   </#list><#t/>
  
  </#if><#t/>
 </#if><#t/>
</#if><#t/>

重啟tomcat

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