Not displaying Error Messages on JSP

**sanjay_jadhav** · Nov 14th, 2007, 05:48 AM

spring version 2.0.7

Want to show error messages on login page but it is failing. I don't know y even error message from validate method of loginValidator is failing to show on jsp,

It is catching exception or errors but fail to show error messages.

1) Bean definition

HTML Code:

	<bean class="com.fulcrum.mvc.controller.LoginController"
		id="loginController">
		<property name="formView">
			<value>loginUser</value>
		</property>
		<property name="successView">
			<value>welcome</value>
		</property>
		<property name="userService">
			<ref bean="userService" />
		</property>
		<property name="ldapService">
			<ref bean="ldapService"/>
		</property>
		<property name="commandClass">
			<value>com.fulcrum.model.dto.UserDto</value>
		</property>
		<property name="validator">
			<bean class="com.fulcrum.mvc.controller.validator.LoginValidator"/>
		</property>
	</bean>

2) Controller

Code:

public class LoginController extends SimpleFormController {

	public LoginController() {
		setCommandClass(UserDto.class);
	}

	protected Object formBackingObject(HttpServletRequest req) throws Exception {
		return new UserDto();
	}

	protected ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object command, BindException errors) throws Exception {
		
		UserDto userDto = (UserDto) command;
		try {
			userDto = getLdapService().findUser(userDto.getUsername(),userDto.getPassword());
			if (userDto != null) {
				userDto = getUserService().findById(userDto);
			}
		} catch (UsernameNotFoundException ne) {
			errors.reject("error.invalide");
			return showForm(request, response, errors);
		} catch (AuthenticationException ne) {
			errors.reject("error.invalide");
			return showForm(request, response, errors);
		} catch (FulcrumException ne) {
			errors.reject("error.invalide");
			return showForm(request, response, errors);
		} catch (Exception ne) {
			errors.reject("error.invalide");
			return showForm(request, response, errors);
		}

		return new ModelAndView(getSuccessView(), "userDto", userDto);
	}

	// COLLABORATORS
	private UserService userService;

	private LDAPService ldapService;

	/**
	 * @return the ldapService
	 */
	public LDAPService getLdapService() {
		return ldapService;
	}

	/**
	 * @return the userService
	 */
	public UserService getUserService() {
		return userService;
	}

	/**
	 * @param userService
	 *            the userService to set
	 */
	public void setUserService(UserService userService) {
		this.userService = userService;
	}

	/**
	 * @param ldapService
	 *            the ldapService to set
	 */
	public void setLdapService(LDAPService ldapService) {
		this.ldapService = ldapService;
	}

}

3) JSP

HTML Code:

<%@ 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">
<html>
<%@ taglib uri="http://www.springframework.org/tags" prefix="spring" %>
<%@ taglib uri="/WEB-INF/tld/c.tld" prefix="c"%>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

<form method="POST" action="login.htm">
	<table border="0" cellspacing="5" cellpadding="0">
		<tr>
			<td align="right" valign="middle"><b>Login: </b></td>
			<td align="left" valign="middle">
					<input type="text" name="username" value="" >
			</td>
		</tr>
		<tr>
			<td align="right" valign="middle"><b>Password: </b></td>
			<td align="left" valign="middle">
					<input type="password" name="password" value="" >
			</td>
		</tr>
		<tr>
			<td colspan="2" align="left"><input type="submit"
				value=" Log In "></td>
		</tr>
	</table>
</form>

<spring:hasBindErrors name="errors">
  <p>There were ${errors.errorCount} errors</p>
  <c:forEach var="err" items="${errors.allErrors}">
    <spring:message code="${err.code}" arguments="${err.arguments[0]}"/>
  </c:forEach>
</spring:hasBindErrors>


</body>
</html>

4) Validator

Code:

public class LoginValidator extends BaseValidator {

	@Override
	public void validate(Object command, Errors errors) {
	    UserDto user = (UserDto) command;
	    ValidationUtils.rejectIfEmpty(errors, "username", "error.required.loginid", new Object[]{user.getUsername()},"Login is required");
	    ValidationUtils.rejectIfEmpty(errors, "password", "error.required.passwd","Password is required");
	}

	@Override
	public boolean supports(Class clazz)  {
		return clazz.equals(UserDto.class);
	}
}

5) properties
error.required.loginid=Login is required {0}
error.required.passwd=Password is required
error.invalide=Authetication failed

**sanjay_jadhav** · Nov 14th, 2007, 07:26 AM

anyone

**pmularien** · Nov 14th, 2007, 07:32 AM

The "name" attribute on your hasBindErrors tag should match the commandName you've assigned to your controller (default: "command").

**sanjay_jadhav** · Nov 14th, 2007, 11:35 PM

Originally Posted by pmularien

The "name" attribute on your hasBindErrors tag should match the commandName you've assigned to your controller (default: "command").

Thanks pmularien, that worked.

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