struts2 消息提示或错误提示action中调用? ? this.addActionError(actionError!)? ? this.addActionM
struts2 消息提示或错误提示
>>action中调用
? ? this.addActionError("actionError!");
? ? this.addActionMessage("actionMessage!");
? ? this.addFieldError("field",?"fieldError");
??? this.addFieldError("field2",?"fieldError2");
?
>>jsp中调用
<%@taglib prefix="s" uri="/struts-tags"%>
<s:actionerror/>
? <s:fielderror>
?? ?? <s:param>field</s:param>
?? <s:param>field2</s:param>
? </s:fielderror>
? 或
? <s:fielderror>
??? <s:param value="%{'field'}" />
??? <s:param value="%{'field2'}" />
? </s:fielderror>
?
<s:actionmessage/>
?
?
下面给出一段代码,帮助大家理解,这里只写了关键代码.1. Action 类中的部分代码:ActionMessages ams = new ActionMessages();
????ams.add(ActionMessages.GLOBAL_MESSAGE,????????????????????????????? new ActionMessage("addMessages : global message",false));
????ams.add("error",new ActionMessage("addMessages : error message",false));
????ams.add("info",new ActionMessage("addMessages : info message",false));
????this.addMessages(httpServletRequest,ams);
????ActionMessages errorMessage = new ActionMessages();
????errorMessages.add(ActionMessages.GLOBAL_MESSAGE,??????????????????????????????new ActionMessage("addErrors : global message",false));
????errorMessages.add("error",????????????????????????????? new ActionMessage("addErrors : error message",false));
????errorMessages.add("info",new ActionMessage("addErrors : info message",false));
????this.addErrors(httpServletRequest,errorMessages);
2. ?JSP文件中的部分代码:
?
<html:messages id="message">
??<bean:write name="message"/>
??<br/>
</html:messages>
<!-- 上面代码的输出结果:
??addErrors : global message
??addErrors : error message
??addErrors : info message
-->
<html:messages id="message" property="info">
??<bean:write name="message"/>? <br />?
</html:messages>
<!-- 这段代码的输出结果为:
??addErrors : info message
-->
??
<html:messages id="message" message="true">
??<bean:write name="message"/>?? <br />?
</html:messages>
<!-- 这段代码的输出结果:
??addMessages : global message
??addMessages : error message
??addMessages : info message
-->
<html:messages id="message" message="true" property="info">
??<bean:write name="message"/>? <br />
</html:messages>
<!-- 这段代码的输出结果为:
??addMessages : info message
-->
