我想点击注册按钮执行RegisterAction中的execute方法。可设置断点没有执行，直接给我的实体赋空值，报了异常
jsp页面----------------------------------------------------------------------------------------------
<%@ taglib uri="/struts-dojo-tags" prefix="sx"%>
<html>
<head>
<title>注册</title>
</head>
<body>
<s:form action="register" method="post" namespace="/">
<s:textfield name="user.loginId" label="用户名"/>
<s:textfield name="user.password" label="密码"/>
<s:textfield name="rePassword" label="确认密码"/>
<s:textfield name="user.phone" label="电话"/>
<s:textfield name="user.userName" label="用户名"/>
<s:submit value="注册"/>
</s:form>
</body>
</html>
struts.xml----------------------------------------------------------------------
<package name="default" extends="struts-default" namespace="/">
<action name="register" class="com.accp.test.action.RegisterAction">
<result name="input">login.jsp</result>
</action>
</package>
</struts>
Action---------------------------------------------------------------------------------
public class RegisterAction extends ActionSupport {
@Override
public String execute() throws Exception {
System.out.println("123");
return NONE;
}
}
异常--------------------------------------------------------------------------------- --------
2012-7-17 20:11:56 com.opensymphony.xwork2.util.logging.commons.CommonsLogger error
严重: Could not create and/or set value back on to object
java.lang.InstantiationException: com.accp.test.entity.User
at java.lang.Class.newInstance0(Class.java:340)
at java.lang.Class.newInstance(Class.java:308)
at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:119)
at com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler.createObject(InstantiatingNullHandler.java:148)
at com.opensymphony.xwork2.conversion.impl.InstantiatingNullHandler.nullPropertyValue(InstantiatingNullHandler.java:126)
at com.opensymphony.xwork2.ognl.OgnlNullHandlerWrapper.nullPropertyValue(OgnlNullHandlerWrapper.java:21)
at ognl.ASTProperty.getValueBody(ASTProperty.java:118)
at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
at ognl.SimpleNode.getValue(SimpleNode.java:258)
at ognl.ASTChain.setValueBody(ASTChain.java:222)
at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)
at ognl.SimpleNode.setValue(SimpleNode.java:301)
at ognl.Ognl.setValue(Ognl.java:737)
at com.opensymphony.xwork2.ognl.OgnlUtil.setValue(OgnlUtil.java:198)
at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:161)
at com.opensymphony.xwork2.ognl.OgnlValueStack.setValue(OgnlValueStack.java:149)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.setParameters(ParametersInterceptor.java:276)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:187)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)