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
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对的支持。
原文链接：http://www.cnblogs.com/zhanghongcan/p/9753917.html
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