java - Spring SimpleFormController - 在成功 View 中包含搜索表单

Question

10 年 1 月 31 日更新:由于此主题继续获得大量浏览...我想知道它最近是否对任何人有帮助？请随时发表评论/反馈，谢谢。

---

我有一个 Spring 表单，我想在其中重用搜索页面以将结果包含在搜索表单下。目前，当我这样做时，我在加载成功 View 时遇到以下错误:

java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'searchAccounts' available as request attribute

这是我的 bean 配置:

<bean name="/search.html" class="myapp.web.AccountSearchController">
        <property name="sessionForm" value="true"/>
    <property name="commandName" value="searchAccounts"/>
    <property name="commandClass" value="myapp.service.AccountSearch"/>
    <property name="validator">
        <bean class="myapp.service.AccountSearchValidator"/>
    </property>
    <property name="formView" value="accountSearch"/>
    <property name="successView" value="accountSearchResults"/>
</bean>

这是包含搜索表单的 JSP 片段:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

<form:form method="post" commandName="searchAccounts">

<table valign="top" cellspacing="0" cellpadding="0" width="500" border="0">

    <tr>
        <td valign="top">

        <div class="border-title">Account Search</div>

        <div id="navhome">
        <div class="border">
        <div id="sidebarhome">


        <table id="form">
            <tr>
                <td colspan="2">Search by Account ID or Domain Name. If
                values are provided for both, only accounts matching both values
                will be returned.</td>
            </tr>

            <tr>
                <td colspan="2">&nbsp;</td>
            </tr>

            <tr>
                <td align="right" valign="top"><form:label path="accountId">Account ID</form:label>:</td>
                <td><form:input path="accountId" size="30"/></td>
            </tr>
            <c:set var="accountIdErrors"><form:errors path="accountId"/></c:set>
            <c:if test="${not empty accountIdErrors}">
            <tr>
                 <td>&nbsp;</td>
                 <td>${accountIdErrors}</td>
            </tr>
            </c:if>
            <tr>
                <td align="right" valign="top"><form:label path="domainName">Domain Name</form:label>:</td>
                <td><form:input path="domainName" size="30"/></td>
            </tr>
            <c:set var="domainNameErrors"><form:errors path="domainName"/></c:set>
            <c:if test="${not empty domainNameErrors}">
            <tr>
                 <td>&nbsp;</td>
                 <td>${domainNameErrors}</td>
            </tr>
            </c:if>
            <tr>
                <td colspan="2">&nbsp;</td>
            </tr>
            <tr>
                <td>&nbsp;</td>
                <td><input type="submit" name="submit" value="Search">
                </td>
            </tr>
        </table>

        </div>
        </div>
        </div>

        </td>
    </tr>
</table>
</form:form>

还有...这是我的表单 Controller 类(减去导入):

    public class AccountSearchController  extends SimpleFormController {

    protected final Log logger = LogFactory.getLog(getClass());

    public ModelAndView onSubmit(Object command, BindException errors) throws ServletException {
        String accountId = ((AccountSearch) command).getAccountId();
        String domainName = ((AccountSearch) command).getDomainName();

        logger.info("User provided search criteria...\n\tDomain Name: " + domainName + "\n\tAccountId: " + accountId);

        //TODO do search

        logger.info("returning from AccountSearch form view to " + getSuccessView());

        return new ModelAndView(getSuccessView());
    }

    protected Object formBackingObject(HttpServletRequest request) throws ServletException {
        AccountSearch accountSearch = new AccountSearch();
        return accountSearch;
    }
}

预先感谢您的帮助!

-j

更新:

我根据下面的回答将其移植到带注释的 Controller 。这是新的/工作代码:

@Controller
@RequestMapping("/search.html")
public class AccountSearchController {

    // note: this method does not have to be called setupForm
    @RequestMapping(method = RequestMethod.GET)
    public String setupForm(Model model) {
        AccountSearchCriteria accountSearchCriteria = new AccountSearchCriteria();
        model.addAttribute("accountSearchCriteria", accountSearchCriteria);
        model.addAttribute("title", "Account Search");
        return "accountSearch";
    }

    // note: this method does not have to be called onSubmit
    @RequestMapping(method = RequestMethod.POST)
    public String onSubmit(@ModelAttribute("accountSearchCriteria") AccountSearchCriteria accountSearchCriteria, BindingResult result, SessionStatus status, Model model) {
        new AccountSearchValidator().validate(accountSearchCriteria, result);
        if (result.hasErrors()) {
            return "accountSearch";

        } else {
            ArrayList<AccountSearchCriteria> accountSearchResults = new ArrayList<AccountSearchCriteria>();

            AccountSearchCriteria rec = new AccountSearchCriteria();
            rec.setDomainName("ajcoon.com");
            accountSearchResults.add(rec);

            AccountSearchCriteria rec2 = new AccountSearchCriteria();
            rec2.setDomainName("ajcoon2.com");
            accountSearchResults.add(rec2);

            //TODO do search
            //ArrayList<HashMap<String,String>> accountSearchResults = new AccountSearchService().search(accountId,domainName);

            if( accountSearchResults.size() < 1 ){
                result.rejectValue("domainName", "error.accountSearch.noMatchesFound", "No matching records were found.");
                return "accountSearch";

            } else if(accountSearchResults.size() > 1){
                model.addAttribute("accountSearchResults", accountSearchResults);
                return "accountSearch";

            } else {
                status.setComplete();
                return "redirect:viewAccount?accountId=";
                //return "redirect:viewAccount?accountId=" + accountSearchResults.get(0).getAccountId();
            }
        }
    }   
}

Answer 1

尝试使用(抛出异常而不是..)

protected Object formBackingObject(HttpServletRequest request)
                            throws Exception {
        AccountSearch accountSearch = new AccountSearch();
        System.out.println("inside formBackingObject");
        return accountSearch;
}

看起来你的 formBackingObject 方法没有被执行。使用上述更改重新运行代码并查看日志控制台以查看是否执行了该方法。

--

您应该使用注解而不是扩展 Controller 。 Spring 3.0 将弃用 Controller 层次结构。