1.错误和信息的处理.
首先在资源文件中定义错误信息和普通信息.如:MessageResources.properties中定义如下:
| java代码: |
# # Resources for testing <html:errors> tag. # errors. header=<table> errors. footer=</table> errors. prefix=<tr><td> errors. suffix=</td></tr> property1error1=Property 1, Error 1 property2error1=Property 2, Error 1 property2error2=Property 2, Error 2 property2error3=Property 2, Error 3 property3error1=Property 3, Error 1 property3error2=Property 3, Error 2 globalError=Global Error # # Resources for testing <html:messages> tag. # messages. header=<table> messages. footer=</table> property1message1=Property 1, Message 1 property2message1=Property 2, Message 1 property2message2=Property 2, Message 2 property2message3=Property 2, Message 3 property3message1=Property 3, Message 1 property3message2=Property 3, Message 2 globalMessage=Global Message
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在程序中定义错误和信息类,这个例子写在JSP中
| java代码: |
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<%
ActionErrors errors = new ActionErrors();
errors.add("property1", new ActionError("property1error1"));
errors.add("property2", new ActionError("property2error1"));
errors.add("property2", new ActionError("property2error2"));
errors.add("property2", new ActionError("property2error3"));
errors.add("property3", new ActionError("property3error1"));
errors.add("property3", new ActionError("property3error2"));
errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("globalError"));
request.setAttribute(Globals.ERROR_KEY, errors);
ActionMessages messages = new ActionMessages();
messages.add("property1", new ActionMessage("property1message1"));
messages.add("property2", new ActionMessage("property2message1"));
messages.add("property2", new ActionMessage("property2message2"));
messages.add("property2", new ActionMessage("property2message3"));
messages.add("property3", new ActionMessage("property3message1"));
messages.add("property3", new ActionMessage("property3message2"));
messages.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("globalMessage"));
request.setAttribute(Globals.MESSAGE_KEY, messages);
%>
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显示错误:
| java代码: |
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<html:errors property="property1" />
<html:errors property="property2" />
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显示信息:
| java代码: |
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<html:messages property="property1" message="true" id="msg" header="messages.header" footer="messages.footer">
<tr>
<td>
<%= pageContext.getAttribute("msg") %>
</td>
</tr>
</html:messages>
<html:messages message="true" id="msg" header="messages.header" footer="messages.footer">
<tr>
<td>
<%= pageContext.getAttribute("msg") %>
</td>
</tr>
</html:messages>
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