前言
当在我们注册用户时，如果给前台的提示是用户名重复并且用户名太长时，就会要往action里面添加多个errors，这时到前台怎么把它依次拿出来
下面话不多说了，来一起看看详细的介绍吧
方法如下
①找到配置文件
struts2-core-2.3.35.jar/template/simple/fielderror.ftl（不同版本的文件路径大同小异）
②创建新的文件包并拷贝文件
在项目根目录下创建template.simple并将fielderror.ftl拷贝过来
此时根目录下的fielderror.ftl文件优先权大于默认的fielderror.ftl文件
③修改拷贝过来的fielderror.ftl文件
修改前文件如下
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<#--/* * $id$ * * 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/> |
将<ul></ul>、<li></li>、<span></span>删除
修改后文件如下
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<#--/* * $id$ * * 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/> |
重启tomcat
总结
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原文链接：http://www.cnblogs.com/zhanghongcan/p/9753917.html
