自定义属性编辑器不适用于Spring MVC中的请求参数?

时间:2010-06-08 15:26:30

标签: spring data-binding spring-mvc spring-annotations

我正在尝试使用Spring注释创建一个多操作Web控制器。该控制器将负责添加和删除用户配置文件以及为jsp页面准备参考数据。

@Controller
public class ManageProfilesController {
    @InitBinder
    public void initBinder(WebDataBinder binder) { 
        binder.registerCustomEditor(UserAccount.class,"account", new UserAccountPropertyEditor(userManager)); 
        binder.registerCustomEditor(Profile.class, "profile", new ProfilePropertyEditor(profileManager));
        logger.info("Editors registered");
    }

    @RequestMapping("remove")
    public void up( @RequestParam("account") UserAccount account,
                @RequestParam("profile") Profile profile) {
        ...
    }

    @RequestMapping("")
    public ModelAndView defaultView(@RequestParam("account") UserAccount account) {
        logger.info("Default view handling");
        ModelAndView mav = new ModelAndView();
        logger.info(account.getLogin());
        mav.addObject("account", account);
        mav.addObject("profiles", profileManager.getProfiles());
        mav.setViewName(view);
        return mav;
    }
    ...
}

以下是我的webContext.xml文件的一部分:

<context:component-scan base-package="ru.mirea.rea.webapp.controllers" />
<context:annotation-config/>
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
    <property name="mappings">
            <value>
               ...
              /home/users/manageProfiles=users.manageProfilesController
            </value>
    </property>
</bean>

<bean id="users.manageProfilesController" class="ru.mirea.rea.webapp.controllers.users.ManageProfilesController">
    <property name="view" value="home\users\manageProfiles"/>
</bean>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />

然而,当我打开映射的网址时,我得到了异常:

java.lang.IllegalArgumentException: Cannot convert value of type [java.lang.String] to required type [ru.mirea.rea.model.UserAccount]: no matching editors or conversion strategy found

我使用spring 2.5.6并计划在一些不太遥远的未来移动到Spring 3.0。但是,根据这个JIRA https://jira.springsource.org/browse/SPR-4182,它应该已经可以在春季2.5.1。

调试显示正确调用了InitBinder方法。

我做错了什么?

更新

public class UserAccountPropertyEditor extends PropertyEditorSupport {
    static Logger logger = Logger.getLogger(UserAccountPropertyEditor.class);

    public UserAccountPropertyEditor(IUserDAO dbUserManager) {
        this.dbUserManager = dbUserManager;
    }

    private IUserDAO dbUserManager;

    public String getAsText() {
        UserAccount obj = (UserAccount) getValue();
        if (null==obj) {
                return "";
        } else {
            return obj.getId().toString();
        }
    }

    public void setAsText(final String value) {
        try {   
            Long id = Long.parseLong(value);
            UserAccount acct = dbUserManager.getUserAccountById(id);
            if (null!=acct) {
                super.setValue(acct);
            } else {
                logger.error("Binding error. Cannot find userAccount with id  ["+value+"]");
                throw new IllegalArgumentException("Binding error. Cannot find userAccount with id  ["+value+"]");
            }
        } catch (NumberFormatException e) {
            logger.error("Binding error. Invalid id: " + value);
            throw new IllegalArgumentException("Binding error. Invalid id: " + value);
        }
    }
}

从UserAccountPropertyEditor记录没有错误。

1 个答案:

答案 0 :(得分:3)

我认为你不想为field指定WebDataBinder.registerCustomEditor()参数。这意味着与表单支持对象一起工作,并且您没有使用它。

尝试使用更简单的2-arg方法,它应该可以工作:

binder.registerCustomEditor(UserAccount.class, new UserAccountPropertyEditor(userManager)); 
binder.registerCustomEditor(Profile.class, new ProfilePropertyEditor(profileManager));