你Struts几呢?用下面的方法试一下,我是Struts1.2用的是下面的方法。。
ActionMessages errors = new ActionMessages();
if((username == null)||(username.length()<1)){
errors.add("username",new ActionError("error.username.required"));
}
ActionMessages errors = new ActionMessages();
if((username == null)||(username.length()<1)){
errors.add("username",new ActionError("error.username.required"));
}
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ActionErrors errors=new ActionErrors();
if((username == null)||(username.length()<1)){
errors.add("username",new ActionError("error.username.required"));
}
是写在哪里的?
如果是写在Form类的public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request)方法中,返回
errors就应该可以显示出来;
如果是在Action的execut方法中,那么还有调用saveErrors(request, errors);方法才可以。
web.xml:
*********************************<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">
<jsp-config>
<taglib>
<taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-html.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/WEB-INF/struts-template.tld</taglib-uri>
<taglib-location>/WEB-INF/struts-template.tld</taglib-location>
</taglib>
</jsp-config>
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>2</param-value>
</init-param>
<init-param>
<param-name>application</param-name>
<param-value>ApplicationResources</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
struts-config.xml:
************************************<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.0//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_0.dtd">
<struts-config>
<form-beans>
<form-bean name="logonForm" type="strutsapp.LogonForm" />
</form-beans> <global-forwards>
<forward name="logon" path="/Logon.do"></forward>
<forward name="logoff" path="/Logoff.do"></forward>
<forward name="welcome" path="/Welcome.do"></forward>
</global-forwards> <action-mappings>
<action path="/Welcome" type="org.apache.struts.actions.ForwardAction" parameter="/Welcome.jsp"/>
<action path="/Logon" type="org.apache.struts.actions.ForwardAction" parameter="/Logon.jsp"/>
<action path="/LogonSubmit" type="strutsapp.LogonAction" name="logonForm" scope="request" validate="false" input="/Logon.jsp">
<forward name="success" path="/Welcome.jsp"/>
</action>
<action path="/Logoff" type="strutsapp.LogoffAction">
<forward name="success" path="/Welcome.jsp"/>
</action>
</action-mappings>
</struts-config>
你在web.xml中应该这样配置
<init-param>
<param-name>application</param-name>
<param-value>resources.application</param-value>
</init-param>
还有在struts-config.xml中你还要配置一下,但是你没有配置!
<message-resources parameter="resources.application"/> 把这个代码放在
</action-mappings>和</struts-config>之中,也就是倒数第二行!
这样就好了!
最好你把资源文件也贴出来