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我已经实现了别名拦截器。现在，当我实现验证拦截器时，验证工作正常，但未显示错误消息。我理解的原因是由于action和jsp页面中的字段名称不同，请求您帮助修复。

代码清单如下所示......

index.jsp 文件是

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" 
pageEncoding="ISO-8859-1"%> 
<%@ taglib uri="/struts-tags" prefix="s"%> 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 
<title>Struts 2</title> 
<s:head/> 
</head> 
<body> 
<s:form action="hello"> 
<s:textfield label="User Name" name="username"/> <br/> 
<s:textfield label="User password" name="userpwd"/> <br/> 
<s:textfield label="Field 1" name="scrField1"/> <br/> 
<s:textfield label="Field 2" name="scrField2"/> <br/> 
<s:submit value="Say Hello"/> 
</s:form> 
</body> 
</html>

HelloAction 如下所示：

package org.tp.actions; 

import com.opensymphony.xwork2.ActionSupport; 

public class HelloAction extends ActionSupport{ 

private String name; 
private String password; 
private String field1; 
private String field2; 

public String getName() { 
return name; 
} 

public void setName(String nm) { 
this.name = nm; 
} 

public String getPassword() { 
return password; 
} 

public void setPassword(String password) { 
this.password = password; 
} 

public String getField1() { 
System.out.println("inside HelloAction.getField1 field1 =="+field1); 
return field1; 
} 

public void setField1(String scrField1) { 

this.field1 = scrField1; 
System.out.println("inside HelloAction.setField1 field1=="+field1); 
} 

public String getField2() { 
System.out.println("inside HelloAction.getField2 field2 =="+field2); 
return field2; 
} 

public void setField2(String scrField2) { 
this.field2 = scrField2; 
} 

public String execute() throws Exception{ 
return "success"; 
} 

}

struts.xml：

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> 
<struts> 
<constant name="struts.devMode" value="true" /> 
<package name="helloworld" extends="struts-default"> 
<action name="hello" class="org.tp.actions.HelloAction" method="execute"> 

<param name="aliases">#{ 'username' : 'name','userpwd' : 'password', 'scrField1' : 'field1', 'scrField2' : 'field2'}</param> 

<interceptor-ref name="alias"> 
<param name="excludeMethods">input,back,cancel,browse</param> 
</interceptor-ref>  

<interceptor-ref name="validation"> 
<param name="excludeMethods">input,back,cancel,browse</param> 
</interceptor-ref>  
<interceptor-ref name="workflow"> 
<param name="excludeMethods">input,back,cancel,browse</param> 
</interceptor-ref> 

<result name="success">/MainPage.jsp</result> 
<result name="input">/index.jsp</result> 
</action> 
</package> 
</struts>

HelloAction-validation 如下所示：

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.3//EN" 
"http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd"> 
<validators> 
<field name="name" > 
<field-validator type="requiredstring"> 
<message >User Name is Required.</message> 
</field-validator> 
</field> 

</validators>
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1 回答 1

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使用标签的fieldName属性<s:fielderror>来显示具有不同名称的字段的错误消息。

<s:fielderror fieldName="name"/>    
<s:textfield label="User Name" name="username"/>
于 2013-09-17T11:10:35.627 回答