Question

我需要验证我的JSP表单。带有JSR 303注释的Hibernate验证器非常适合简单验证（如@NotEmpty）。对于更复杂的验证，我需要验证器类。但是当我注入自己的验证器时，内置注释的JSR 303没有做任何事情！

如何一起使用注释和类验证？

JSP表单：

<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<%-- ... --%>
<div>
    <c:url var="address" value="/form" />
    <c:if test="${not empty message}">${message}</c:if>   
    <form:form action="${address}" method="POST" commandName="user">            
        <%-- ... --%>
        <form:label path="nickname">Nickname</form:label>
        <form:input type="text" path="nickname" />
        <form:errors path="nickname" cssClass="error"></form:errors>

        <form:label path="password">Password</form:label>
        <form:input type="password"  path="password" />
        <form:errors path="password" cssClass="error"></form:errors>

        <form:label path="password2">Password</form:label>
        <form:input type="password" path="password2" />

        <button type="submit">Send</button>
    </form:form>
</div>

实体：

@Entity
@Table(name = "User")
public class User implements Serializable {
    // ...

    @NotEmpty(message="Missing name!")
    @Column(name = "name", nullable = false)
    private String name;

    @NotEmpty
    @javax.validation.constraints.Size.List(value = { 
            @Size(min=5, message="Min 5 chars!"),
            @Size(max=10, message="Max 10 chars!")
            })
    @Column(name = "nickname", nullable = false)
    private String nickname;

    @NotEmpty
    @Column(name = "password", nullable = false)
    private String password;

    @Transient
    @NotEmpty
    private String password2;

    public User() {}
    // setters and getters...
}

验证

@Component
public class FormValidator implements Validator {

    @Override
    public boolean supports(Class<?> clazz) {
        return User.class.isAssignableFrom(clazz);
    }

    @Override
    public void validate(Object target, Errors errors) {

        ValidationUtils.rejectIfEmpty(errors, "password", "password.not.empty", "Enter password!");
        ValidationUtils.rejectIfEmpty(errors, "password2", "password.not.empty");

        User u = (User) target;
        if ( ! u.getPassword().equals(u.getPassword2()) ) {
            errors.rejectValue("password", "password.not.equals");  
        }       
}

控制器：

@Controller
public class FormController {

    @Autowired
    private UserManager userManager;

    @RequestMapping(value="/form", method = RequestMethod.GET)
    public String login(ModelMap model) { 
        model.addAttribute("user", new User());     
        return "register"; 
    }

    @RequestMapping(value="/form", method = RequestMethod.POST)
    public String registerSave(ModelMap model,  @Valid @ModelAttribute("user") User user, BindingResult result) {     
        if (result.hasErrors()) {
            model.addAttribute("message", "ERROR");
            return "register";          
        }
        user.setPassword(password);
        /...
        userManager.save(user);     
        model.addAttribute("message", "OK");

        return "register"; 
    }

    @InitBinder("user")
    protected void initBinder(WebDataBinder binder) {       
        binder.setValidator(new FormValidator());       
    }
}

Spring验证类和Hibernate验证器注释一起使用

0 个答案: