在运行Spring MVC web应用程序时出现以下错误:-
org.springframework.beans。noreadablepropertyexception: bean类的"username"属性无效。字符串]:Bean属性'username'是不可读的或有一个无效的getter方法:getter的返回类型是否匹配setter的参数类型?
为什么错误指向String类如java.lang.String?它应该取自我的UserForm对象。
UserForm: -
package myspring;
/**
* @author vinod827
*
*/
public class UserForm {
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;
}
}
控制器类(LoginPageController):-
/**
*
*/
package myspring;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
/**
* @author vinod827
*
*/
@Controller
@RequestMapping(value = "/login")
public class LoginPageController {
private final Logger logger = LoggerFactory.getLogger(LoginPageController.class);
@RequestMapping(method = RequestMethod.GET)
public String showLoginPage(ModelMap modelMap){
logger.info("**************");
UserForm userForm = new UserForm();
modelMap.addAttribute("userForm", "userForm");
return "login";
}
@RequestMapping(method = RequestMethod.POST)
public String verifyLogin(UserForm userForm, BindingResult bindingResult, ModelMap modelMap){
logger.info("********&&&&&&&&&******");
String username = "username";
String password = "password";
logger.info(username+":"+password);
userForm = (UserForm) modelMap.get(userForm);
modelMap.addAttribute("userForm", userForm);
return "success";
}
}
JSP: -
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<!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>Sign-In</title>
</head>
<body>
<h3>Secure Sign-in</h3>
<form:form method="post" action="login" commandName="userForm">
<form:input path="username" type="text"/>
<form:errors path="username" /><br>
<form:input path="password" type="password"/>
<form:errors path="password" /><br><br>
<form:button id="submit" name="submit" value="submit">Submit</form:button>
</form:form>
</body>
</html>
你能告诉我我在哪里出错了吗?我试着重构UserForm的类名，只是' user .java'，并将用户名重命名为相应的JSP用户，但仍然显示相同的错误。
谢谢你,
在LoginPageController中，更改为
modelMap.addAttribute("userForm", new UserForm());