<s:fielderror/>使用
<s:fielderror/>
该标签主要用于在页面上输出在Action中设置的FieldError信息。用法如下所示:
//TestStruts2Tag.java
import com.opensymphony.xwork2.ActionSupport;
public class TestStruts2Tag extends ActionSupport {
@Override
public String execute() throws Exception {
// TODO Auto-generated method stub
return SUCCESS;
}
@Override
public void validate() {
// TODO Auto-generated method stub
this.addActionError("actionError!");
this.addActionMessage("actionMessage!");
this.addFieldError("field", "fieldError");
this.addFieldError("field2", "fieldError2");
}
}
import com.opensymphony.xwork2.ActionSupport;
public class TestStruts2Tag extends ActionSupport {
@Override
public String execute() throws Exception {
// TODO Auto-generated method stub
return SUCCESS;
}
@Override
public void validate() {
// TODO Auto-generated method stub
this.addActionError("actionError!");
this.addActionMessage("actionMessage!");
this.addFieldError("field", "fieldError");
this.addFieldError("field2", "fieldError2");
}
}
//index.jsp部分代码
<s:fielderror/>
<s:fielderror>
<s:param>field</s:param>
<s:param>field2</s:param>
</s:fielderror>
<s:fielderror/>
<s:fielderror>
<s:param>field</s:param>
<s:param>field2</s:param>
</s:fielderror>
//struts.xml
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<include file="struts-default.xml"/>
<package name="TestStruts2Tag" extends="struts-default">
<action name="testTag" class="TestStruts2Tag">
<result name="success">/index.jsp</result>
<result name="input">/index.jsp</result>
</action>
</package>
</struts>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<include file="struts-default.xml"/>
<package name="TestStruts2Tag" extends="struts-default">
<action name="testTag" class="TestStruts2Tag">
<result name="success">/index.jsp</result>
<result name="input">/index.jsp</result>
</action>
</package>
</struts>
注:<s:fielderror />用于输出所有FieldError信息。
<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>
用于输出"field"和"field2"的信息。
7、<s:actionerror/>
用于输出ActionError信息。用法如下所示:
<s:actionerror/>
8、用于输出ActionMessage信息。用法如下所示:
<s:actionmessage/>
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