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我正在尝试使用 Spring 注释创建一个多动作 Web 控制器。该控制器将负责添加和删除用户配置文件并为 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;
    }
    ...
}

这是我的 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" />

但是,当我打开映射的 url 时,出现异常:

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 并计划在不远的将来迁移到 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 spring 2.5.1 中使用。

调试显示 InitBinder 方法被正确调用。

我究竟做错了什么?

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);
        }
    }
}

没有从 UserAccountPropertyEditor 记录的错误。

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1 回答 1

3

我认为您不想将field参数指定为WebDataBinder.registerCustomEditor(). 这旨在与表单支持对象一起工作,而您没有使用它。

改用更简单的 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));
于 2010-06-08T20:10:09.430 回答