Java - 同一視圖上的兩個不同的@ModelAttribute占用相同的值
[英]Java - Two different @ModelAttribute on the same view takes up same values
問題描述
這可能是一個非常簡單的錯誤。 請幫忙。 我有一個帶有兩個<form:form>標簽的home.jsp頁面：
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib uri="/META-INF/c.tld" prefix="c"%>
<%@ taglib uri="/META-INF/fmt.tld" prefix="fmt"%>
<%@ taglib uri="/META-INF/spring-form.tld" prefix="form"%>
<html>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<head>
<title>Home Page</title>
</head>
<body>
<div>
<form:form name="loginForm" modelAttribute="loginUser" action="login" method="post">
<c:if test="${loginMsg != null}"><c:out value="${loginMsg}"></c:out></c:if>
<br/>
Email: <form:input name="loginEmail" id="loginEmail" value="" path="email"/>
<form:errors path="email" cssClass="error" />
<br/>
password: <form:password name="loginPassword" Id="loginPassword" value="" path="password" />
<form:errors path="password" />
<br/>
<input type="submit" id="id_login" value="Login">
</form:form>
</div>
<div>
<form:form name="SignUpForm" modelAttribute="signUpUser" action="signup" method="post">
<c:if test="${signupMsg != null}"><c:out value="${signupMsg}"></c:out></c:if>
<br/>
Full Name: <form:input name="name" id="name" value="" path="name"/>
<form:errors path="name" cssClass="error" />
<br/>
Email: <form:input name="signupEmail" id="signupEmail" value="" path="email"/>
<form:errors path="email" cssClass="error" />
<br/>
password: <form:password name="signUpPassword" Id="signUpPassword" value="" path="password" />
<form:errors path="password" />
<br/>
<input type="submit" id="id_signUp" value="Sign Up">
</form:form>
</div>
</body>
</html>
每個表單由不同的控制器處理。 問題是，當我填充（只）其中一個表單並單擊提交按鈕時，兩個ModelAttribute填充相同的值
我的控制器沒什么特別之處：
@RequestMapping("/login")
public String login(@ModelAttribute("loginUser") User user,
BindingResult result, @ModelAttribute("signUpUser") User signUpUser,
BindingResult signUpResult, ModelMap model, HttpServletRequest request,
HttpServletResponse response) {
// Here, both user and signUpUser have the same value (WHY?)
// But I dint fill the sign up form at all
loginFormValidator.validate(user, result);
if(Errors in `result`)
return "forward:/home";
// Authentication Logic
request.getSession().setAttribute("s_user_obj", some_variable);
return "forward:/home";
}
更新：
這是生成的HTML。 login操作之前：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<head>
<title>Welcome to m0m0</title>
</head>
<body>
<div>
<form id="loginUser" name="loginForm" action="login" method="post">
<br/>
Email: <input id="loginEmail" name="email" name="loginEmail" type="text" value=""/>
<br/>
password: <input id="password" name="password" name="loginPassword" Id="loginPassword" type="password" value=""/>
<br/>
<input type="submit" id="id_login" value="Login">
</form>
</div>
<div>
<form id="signUpUser" name="SignUpForm" action="signup" method="post">
<br/>
Full Name: <input id="name" name="name" name="name" type="text" value=""/>
<br/>
Email: <input id="signupEmail" name="email" name="signupEmail" type="text" value=""/>
<br/>
password: <input id="password" name="password" name="signUpPassword" Id="signUpPassword" type="password" value=""/>
<br/>
<input type="submit" id="id_signUp" value="Sign Up">
</form>
</div>
</body>
</html>
login行動：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<head>
<title>Welcome to m0m0</title>
</head>
<body>
<div>
<form id="loginUser" name="loginForm" action="login" method="post">
<br/>
Email: <input id="loginEmail" name="email" name="loginEmail" type="text" value="a@b.com"/>
<br/>
password: <input id="password" name="password" name="loginPassword" Id="loginPassword" type="password" value=""/>
<br/>
<input type="submit" id="id_login" value="Login">
</form>
</div>
<div>
<form id="signUpUser" name="SignUpForm" action="signup" method="post">
<br/>
Full Name: <input id="name" name="name" name="name" type="text" value=""/>
<br/>
Email: <input id="signupEmail" name="email" name="signupEmail" type="text" value="a@b.com"/>
<br/>
password: <input id="password" name="password" name="signUpPassword" Id="signUpPassword" type="password" value=""/>
<br/>
<input type="submit" id="id_signUp" value="Sign Up">
</form>
</div>
</body>
</html>
1 個解決方案
解決方案1
2 已采納 2012-09-18 07:24:16
spring將參數綁定到兩個模型，因為它不考慮綁定的模型名稱（並且btw。請求中沒有關於模型名稱的信息）
每個表單由不同的控制器處理。
但這個方法處理兩者？
@RequestMapping("/login")
public String login(@ModelAttribute("loginUser") User user,
BindingResult result, @ModelAttribute("signUpUser") User signUpUser,
BindingResult signUpResult, ModelMap model, HttpServletRequest request,
HttpServletResponse response) {
// Here, both user and signUpUser have the same value (WHY?)
// But I dint fill the sign up form at all
loginFormValidator.validate(user, result);
if(Errors in `result`)
return "forward:/home";
// Authentication Logic
request.getSession().setAttribute("s_user_obj", some_variable);
return "forward:/home";
}
編輯：
public class Form {
private User loginUser;
private User signupUser;
.....
}
然后你可以做到以下幾點
<form:input path="loginUser.name" />
和
<form:input path="signupUser.name" />
在這種情況下，您將只有1個模型屬性，而不是2
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