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Java Spring MVC将对象绑定解释为字符串

java spring spring-mvc

Java Spring MVC将对象绑定解释为字符串,java,spring,spring-mvc,spring-form,Java,Spring,Spring Mvc,Spring Form,我试图创建一个包含所有用户报告下拉列表的Spring表单，但是jsp页面将我的对象绑定解释为字符串。我已经为此挣扎了一段时间，目前正在使用一个内联脚本来打印结果，但是我更喜欢使用对象绑定 view.jsp <%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%> <%@page import="com.cognos.developer.schemas.bibus._3.Report,

我试图创建一个包含所有用户报告下拉列表的Spring表单，但是jsp页面将我的对象绑定解释为字符串。我已经为此挣扎了一段时间，目前正在使用一个内联脚本来打印结果，但是我更喜欢使用对象绑定

view.jsp

<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%@page
    import="com.cognos.developer.schemas.bibus._3.Report, java.util.*"%>


<form:form method="POST" modelAttribute="reportView" action="">
        <form:label path="defaultName.value">Name</form:label>
        <form:input path="defaultName.value"/><br/>
        <form:label path="base">Report Name</form:label>
        <form:select path="base">
        <form:options items="${reports}" itemValue="defaultName" itemLabel="defaultName" />
        <%
            //List<Report> reportList = (List)request.getAttribute("reports");
            //for (Report r : reportList) {
            //  out.print("<option value=");
            //  out.print(r);
            //  out.println(">" + r +"</option>");
            //}
        %>
        </form:select>
        <form:label path="disabled.value">Disabled?</form:label>
        <form:checkbox path="disabled.value"/>
        <form:hidden path="searchPath.value" />
        <div class="input-group-btn">
            <input class="btn btn-default" type="submit" value="Update" />
        </div>
    </form:form>


名称


报告名称
残废
controller.java

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
//import org.springframework.web.servlet.ModelAndView;
import static org.springframework.web.bind.annotation.RequestMethod.GET;

import com.cognos.developer.schemas.bibus._3.Report;


@RequestMapping(value="/new", method=GET)
public String newView (@RequestParam("usr")String usr, Map<String, Object> model) {
    //public String newView(){
    cognos.checkConfig();
    cognos.connectToCognos(); 
    cognos.logonToCognosAsUsr(usr);
    ReportView rv = new ReportView();
    model.put("reportView", rv);
    Map<String, String> map = new HashMap<String, String>();
    map.put("STILL DOES NOT", "WORK");
    model.put("reports", map);
    //model.put("reports", cognos.fetchReports());
    cognos.logoffFromCognos();
    return "new_view";
}

import javax.servlet.ServletException；
导入javax.servlet.annotation.WebServlet；
导入javax.servlet.http.HttpServlet；
导入javax.servlet.http.HttpServletRequest；
导入javax.servlet.http.HttpServletResponse；
导入org.springframework.beans.factory.annotation.Autowired；
导入org.springframework.stereotype.Controller；
导入org.springframework.validation.BindingResult；
导入org.springframework.validation.annotation.Validated；
导入org.springframework.web.bind.annotation.ModelAttribute；
导入org.springframework.web.bind.annotation.RequestMapping；
导入org.springframework.web.bind.annotation.RequestMethod；
导入org.springframework.web.bind.annotation.RequestParam；
//导入org.springframework.web.servlet.ModelAndView；
导入静态org.springframework.web.bind.annotation.RequestMethod.GET；
导入com.cognos.developer.schemas.bibus.\u 3.Report；
@RequestMapping（value=“/new”，method=GET）
公共字符串newView（@RequestParam（“usr”）字符串usr，映射模型）{
//公共字符串newView（）{
cognos.checkConfig（）；
cognos.connectToCognos（）；
cognos.logonToCognosAsUsr（usr）；
ReportView rv=新的ReportView（）；
模型放置（“报告视图”，rv）；
Map Map=newhashmap（）；
map.put（“仍然不”、“工作”）；
模型放置（“报告”，地图）；
//model.put（“reports”，cognos.fetchReports（））；
logoffFromCognos（）；
返回“新建视图”；
}
CognosService.java

public Map<String, Report> fetchReports() {
        BaseClass bc[] = null;
        String searchPath = "/content//report";
        List<Report> rtn = new ArrayList<Report>();
        try {
            SearchPathMultipleObject spMulti =
                    new SearchPathMultipleObject(searchPath);
            bc = cmService.query(spMulti, props, new Sort[] {}, new QueryOptions());
        } catch (Exception e) {
            e.printStackTrace();
        }
        if (bc != null) {
            for (int i = 0; i < bc.length; i++) {
                Report r = (Report)bc[i];
                rtn.add(r);

            }
        }
        Collections.sort(rtn, new ReportComparator());
        for (Report rp : rtn){
            reportList.put(rp.getStoreID().getValue().toString(), rp);
        }
        return reportList;
    }

publicmap fetchReports（）{
基类bc[]=null；
字符串searchPath=“/content//report”；
List rtn=new ArrayList（）；
试一试{
SearchPathMultipleObject spMulti=
新的SearchPathMultipleObject（searchPath）；
bc=cmService.query（spMulti，props，new Sort[]{}，new QueryOptions（））；
}捕获（例外e）{
e、 printStackTrace（）；
}
if（bc！=null）{
for（int i=0；i
web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>

    <display-name>Report Scheduler</display-name>
    <servlet>
        <servlet-name>views</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>views</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>views/index.jsp</welcome-file>
    </welcome-file-list>
</web-app>


报表调度程序
意见
org.springframework.web.servlet.DispatcherServlet
1.
意见
/
views/index.jsp
views-servlet.xml

<?xml version="1.0" encoding="UTF-8" ?>

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"

xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">

<mvc:annotation-driven />
<context:component-scan base-package="com.enernoc.reporting.ReportScheduler" />

<!-- <mvc:resources mapping="/resources/**" location="/resources/" /> -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix">
<value>/views/</value>
</property>
<property name="suffix" value=".jsp" />
</bean>

</beans>


/观点/
堆栈跟踪

org.apache.jasper.JasperException: An exception occurred processing JSP page /views/new_view.jsp at line 13

10:         <form:input path="defaultName.value"/><br/>
11:         <form:label path="base">Report Name</form:label>
12:         <form:select path="base">
13:         <form:options items="${reports}" itemValue="defaultName" itemLabel="defaultName" />
14:         </form:select>
15:         <form:label path="disabled.value">Disabled?</form:label>
16:         <form:checkbox path="disabled.value"/>


Stacktrace:
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168)
    org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
    org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1228)
    org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1011)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:955)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
root cause

javax.servlet.ServletException: javax.servlet.jsp.JspException: Type [java.lang.String] is not valid for option items
    org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:912)
    org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:841)
    org.apache.jsp.views.new_005fview_jsp._jspService(new_005fview_jsp.java:103)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168)
    org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
    org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1228)
    org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1011)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:955)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
root cause

javax.servlet.jsp.JspException: Type [java.lang.String] is not valid for option items
    org.springframework.web.servlet.tags.form.OptionWriter.writeOptions(OptionWriter.java:143)
    org.springframework.web.servlet.tags.form.OptionsTag.writeTagContent(OptionsTag.java:157)
    org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:84)
    org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:80)
    org.apache.jsp.views.new_005fview_jsp._jspx_meth_form_005foptions_005f0(new_005fview_jsp.java:335)
    org.apache.jsp.views.new_005fview_jsp._jspx_meth_form_005fselect_005f0(new_005fview_jsp.java:296)
    org.apache.jsp.views.new_005fview_jsp._jspx_meth_form_005fform_005f0(new_005fview_jsp.java:144)
    org.apache.jsp.views.new_005fview_jsp._jspService(new_005fview_jsp.java:93)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168)
    org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
    org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1228)
    org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1011)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:955)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

org.apache.jasper.JasperException：在第13行处理JSP页面/views/new_view.JSP时发生异常
10:

11：报告名称
12:         
13:         
14:         
15：残疾？
16:         
堆栈跟踪：
org.apache.jasper.servlet.JspServletWrapper.handleJspException（JspServletWrapper.java:568）
org.apache.jasper.servlet.JspServletWrapper.service（JspServletWrapper.java:455）
org.apache.jasper.servlet.JspServlet.serviceJspFile（JspServlet.java:390）
org.apache.jasper.servlet.JspServlet.service（JspServlet.java:334）
javaservlet.http.HttpServlet.service（HttpServlet.java:728）
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel（InternalResourceView.java:168）
org.springframework.web.servlet.view.AbstractView.render（AbstractView.java:303）
org.springframework.web.servlet.DispatcherServlet.render（DispatcherServlet.java:1228）
org.springframework.web.servlet.DispatcherServlet.processDispatchResult（DispatcherServlet.java:1011）
org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:955）
org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:877）
org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:966）
org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:857）
javaservlet.http.HttpServlet.service（HttpServlet.java:621）
org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:842）
javaservlet.http.HttpServlet.service（HttpServlet.java:728）
根本原因
javax.servlet.ServletException:javax.servlet.jsp.jspeException:Type[java.lang.String]对选项项无效
org.apache.jasper.runtime.PageContextImpl.doHandlePageException（PageContextImpl.java:912）
org.apache.jasper.runtime.PageContextImpl.handlePageException（PageContextImpl.java:841）
org.apache.jsp.views.new_005fview_jsp._jsp服务（new_005fview_jsp.java:103）
org.apache.jasper.runtime.HttpJspBase.service（HttpJspBase.java:70）
javaservlet.http.HttpServlet.service（HttpServlet.java:728）
org.apache.jasper.servlet.JspServletWrapper.service（JspServletWrapper.java:432）
org.apache.jasper.servlet.JspServlet.serviceJspFile（JspServlet.java:390）
org.apache.jasper.servlet.JspServlet.service（JspServlet.java:334）
javaservlet.http.HttpServlet.service（HttpServlet.java:728）
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel（InternalResourceView.java:168）
org.springframework.web.servlet.view.AbstractView.render（AbstractView.java:303）
org.springframework.web.servlet.DispatcherServlet.render（DispatcherServlet.java:1228）
org.springframework.web.servlet.DispatcherServlet.processDispatchResult（DispatcherServlet.java:1011）
org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServle

<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
    <%@page
        import="com.cognos.developer.schemas.bibus._3.Report, java.util.*"%>


    <form:form method="POST" modelAttribute="reportView" action="">
            <form:label path="defaultName.value">Name</form:label>
            <form:input path="defaultName.value"/><br/>
            <form:label path="base">Report Name</form:label>
            <form:select path="base">
            <form:options items="${reports}" itemValue="YOUR_ID_OR_VALUE_FIELD_NAME" itemLabel="VALUE_PRESENTED_FIELD_NAME"/>
            </form:select>
            <form:label path="disabled.value">Disabled?</form:label>
            <form:checkbox path="disabled.value"/>
            <form:hidden path="searchPath.value" />
            <div class="input-group-btn">
                <input class="btn btn-default" type="submit" value="Update" />
            </div>
        </form:form>