Question

我正在尝试通过Struts 2操作的表单设置一个简单的bean。我对这个框架很新，而且我看不到我错过的东西......

bean FormBean：

public class FormBean {
    private String login="";
    private String password="";

    public String getLogin() {
        return login;
    }
    public void setLogin(String login) {
        this.login = login;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }   
}

行动FormAction：

public class FormAction extends ActionSupport {

    private FormBean form;  

    @Override
    public String execute() throws Exception {
        return SUCCESS;
    }

    public FormBean getForm() {
        return form;
    }    
    public void setForm(FormBean form) {
        this.form = form;
    }
}

表单index.jsp：

<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
</head> 
<body>
<s:form action="login.action" method="post">
    <s:textfield name="form.login" label="User" size="20" />
    <s:password name="form.password" label="Password" size="20" />
    <s:submit method="execute" value="Login" align="center" />
</s:form>
</body>
</html>

结果Welcome.jsp：

<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
</head>

<body>
    <h2>Welcome <s:property value="form.login" /></h2>
    <p><s:property value="form.password" /></p>
</body>
</html>

当我提交表单时，我的数据不显示，我得到了这个例外：

Unexpected Exception caught setting 'login' on 'class tuto.form.FormAction: Error setting expression 'login' with value ['test', ]
Error setting expression 'login' with value ['test', ] - [unknown location]
    at com.opensymphony.xwork2.ognl.OgnlValueStack.handleRuntimeException(OgnlValueStack.java:197)
[...]
Caused by: No object in the CompoundRoot has a publicly accessible property named 'login' (no setter could be found). - [unknown location]
    at com.opensymphony.xwork2.ognl.accessor.CompoundRootAccessor.setProperty(CompoundRootAccessor.java:106)
[...]

Answer 1

嘿，我刚刚复制了你的代码并制作了一个调度程序servlet，它的工作正常。而且无需在Action Class中初始化FormBean。这是对的。

Struts 2 - 在动作上设置bean

1 个答案: