1

嗨，我对 struts2 很陌生。从一些书籍和网站我得到了这个例子。在动作类中，它使用 validate 方法来检查逻辑。该方法在 print 语句中称为 bcoz。但是该错误未显示在字段附近。请帮帮我

索引.jsp

 <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Home</title>
</head>
<body>
<s:form action="LoginAction ">
<s:textfield name="username" label="Username" />
<s:textfield name="password" label="Password" />
<s:submit value="Login"></s:submit>
</s:form>
</body>
</html>

Struts.xml

<package name="default" extends="struts-default">
        <action name="LoginAction" class="org.shammu.struts2.actions.LoginAction">
                <result name="success">/welcome.jsp</result>
                <result name="input">/index.jsp</result>
        </action>
        <action name="emptypassthrough">
                <result>index.jsp</result>
        </action>


</package>

登录操作.java

 package org.shammu.struts2.actions;

 import org.shammu.struts2.beans.LoginBean;

 import com.opensymphony.xwork2.ActionSupport;

 @SuppressWarnings("serial")
 public class LoginAction extends ActionSupport{

private String username;
private String password;
public String getUsername() {
    return username;
}
public void setUsername(String username) {
    this.username = username;
}
public String getPassword() {
    return password;
}
public void setPassword(String password) {
    this.password = password;
}
public String execute(){
    LoginBean login = new LoginBean();
    login.setPassword(password);
    login.setUsername(username);
    if (getUsername().equals("abcd")) {
        return "success";
    } else {
        return "input";
    }

}

@Override
public void validate() {
    if (username.length() < 3) {
        System.out.print("user err ok");
        this.addFieldError(username, "Username Empty Pls provide");

    }
    if (password.length() < 3) {
        System.out.print("Pass err ok");
        this.addFieldError(password, "Password Empoty provride one pkls");
    }

}
 }

我不考虑执行方法。我希望将错误消息打印在字段附近...帮助

4

2 回答 2

4

您没有正确使用addFieldError方法。该方法中的第一个参数是字段的名称。在您的情况下，它应该是"username".

addFieldError("username", "Username Empty Pls provide");
于 2013-08-28T11:16:25.610 回答
4

要显示fielderror你需要<s:fielderror />在你的jsp中添加。

如果存在，它会呈现字段错误。具体布局取决于特定主题。默认情况下，字段错误字符串将被 html 转义。

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Home</title>
</head>
<body>
<s:form action="LoginAction ">

<s:textfield name="username" label="Username" /><s:fielderror fieldName="username"/>
<s:textfield name="password" label="Password" /><s:fielderror fieldName="password"/>

<s:submit value="Login"></s:submit>
</s:form>
</body>
</html>
于 2013-08-28T07:46:29.500 回答