spring - Bean 名称的 BindingResult 和普通目标对象都不能用作请求属性

Question

这个问题在这里已经有了答案:

What causes "java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'command' available as request attribute"? (6 个回答)

关闭 5年前。

---

各位专家，我有这个抛出上述错误的 Controller 代码。直到昨天它工作正常，我不知道同事对这段代码做了什么，今天我看到了错误:

Bean 名称 'sideForm' 的 BindingResult 和普通目标对象都不能用作请求属性

您能否建议我在哪里查找此类错误。我在 POST 或 GET 方法声明中是否有任何错误或返回错误？

非常感谢您的帮助:)

package com.att.analytics.ui;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.si.myworld.business.AdminChart;
import com.si.myworld.business.Chart;
import com.si.myworld.dao.AdminChartSummaryData;
import com.si.myworld.dao.BulletinData;
import com.si.myworld.dao.ChartData;

@RequestMapping("/index.html")
@Controller
public class IndexController {

private static final Logger log = Logger.getLogger(IndexController.class);

/**
 * Called to load the page initially (GET request)
 * 
 * @param model
 * @return
 */
@RequestMapping(method = RequestMethod.GET)
public String getCharts(ModelMap model) {

    Chart chart = new Chart();
    chart.setTimeline("Monthly");
    chart.setStartDt("mm/dd/yyyy");
    chart.setEndDt("mm/dd/yyyy");

    AdminChartSummaryData acsd = new AdminChartSummaryData();
    List<AdminChart> list = acsd.getLandingChartDataList();

    if (list.size() == 4) {
        Chart chart1 = new Chart(list.get(0));
        Chart chart2 = new Chart(list.get(1));
        Chart chart3 = new Chart(list.get(2));
        Chart chart4 = new Chart(list.get(3));
        model.put("chart1", chart1);
        model.put("chart2", chart2);
        model.put("chart3", chart3);
        model.put("chart4", chart4);

        log.info("chart 1>>>>" + chart1);


        ChartData cd = new ChartData();

        String chartOneDatasource = cd.fetchChartDatasourceName(chart1
                .getChartSubgroup());
        String chartTwoDatasource = cd.fetchChartDatasourceName(chart2
                .getChartSubgroup());
        String chartThreeDatasource = cd.fetchChartDatasourceName(chart3
                .getChartSubgroup());
        String chartFourDatasource = cd.fetchChartDatasourceName(chart4
                .getChartSubgroup());

        String breadcrumbOne = chart1.getChartGroup() + ">>"
                + chart1.getChartSubgroup();
        String breadcrumbTwo = chart2.getChartGroup() + ">>"
                + chart2.getChartSubgroup();
        String breadcrumbThree = chart3.getChartGroup() + ">>"
                + chart3.getChartSubgroup();
        String breadcrumbFour = chart4.getChartGroup() + ">>"
                + chart4.getChartSubgroup();


        BulletinData bd = new BulletinData();
        String bulletin = bd.getBulletinData();

        model.put("sideForm", chart);



        model.put("chartOneDatasource", chartOneDatasource);
        model.put("chartTwoDatasource", chartTwoDatasource);
        model.put("chartThreeDatasource", chartThreeDatasource);
        model.put("chartFourDatasource", chartFourDatasource);

        model.put("breadcrumbOne", breadcrumbOne);
        model.put("breadcrumbTwo", breadcrumbTwo);
        model.put("breadcrumbThree", breadcrumbThree);
        model.put("breadcrumbFour", breadcrumbFour);

        model.put("bulletin", bulletin);
    }

    return "land";
}


@RequestMapping(method = RequestMethod.POST)
public String loadCharts(HttpServletRequest request, ModelMap model, @ModelAttribute("sideForm") Chart chart) {

    String from_date = request.getParameter("startDt");
    String to_date = request.getParameter("endDt");

    chart.setStartDt(from_date);
    chart.setEndDt(to_date);

    ChartData cd = new ChartData();

    BulletinData bd = new BulletinData();
    String bulletin = bd.getBulletinData();



    AdminChartSummaryData acsd = new AdminChartSummaryData();
    List<AdminChart> list = acsd.getLandingChartDataList();
    if (list.size() == 4) {
        Chart chart1 = new Chart(list.get(0));
        Chart chart2 = new Chart(list.get(1));
        Chart chart3 = new Chart(list.get(2));
        Chart chart4 = new Chart(list.get(3));
        model.put("chart1", chart1);
        model.put("chart2", chart2);
        model.put("chart3", chart3);
        model.put("chart4", chart4);


        String chartOneDatasource = cd.fetchChartDatasourceName(chart1
                .getChartSubgroup());
        String chartTwoDatasource = cd.fetchChartDatasourceName(chart2
                .getChartSubgroup());
        String chartThreeDatasource = cd.fetchChartDatasourceName(chart3
                .getChartSubgroup());
        String chartFourDatasource = cd.fetchChartDatasourceName(chart4
                .getChartSubgroup());

        model.put("chartOneDatasource", chartOneDatasource);
        model.put("chartTwoDatasource", chartTwoDatasource);
        model.put("chartThreeDatasource", chartThreeDatasource);
        model.put("chartFourDatasource", chartFourDatasource);

        String breadcrumbOne = chart1.getChartGroup() + ">>"
                + chart1.getChartSubgroup();
        String breadcrumbTwo = chart2.getChartGroup() + ">>"
                + chart2.getChartSubgroup();
        String breadcrumbThree = chart3.getChartGroup() + ">>"
                + chart3.getChartSubgroup();
        String breadcrumbFour = chart4.getChartGroup() + ">>"
                + chart4.getChartSubgroup();


        model.put("breadcrumbOne", breadcrumbOne);
        model.put("breadcrumbTwo", breadcrumbTwo);
        model.put("breadcrumbThree", breadcrumbThree);
        model.put("breadcrumbFour", breadcrumbFour);
    }
    return "land";
}


@ModelAttribute("timeline")
public Collection<String> populateTimeline() {
    return Arrays.asList("Daily", "Weekly", "Monthly", "Quarterly",
            "Annually", "12_Month_Rolling");
}
}

此页面从如下所示的表单中获取值:

<form:form commandName="sideForm">
<div style="font-weight:bold; color:#000">Timeline</div>


<div style="margin:0 0 5px 0;"><form:select path="timeline" items="${timeline}" id="tm"/></div>

<div class="tofrom">From:</div>

<form:input path="startDt" id="from_date" size="7" maxlength="10" />

<div class="tofrom">To:</div>

<form:input path="endDt" id="to_date" size="7" maxlength="12" />

<input type="submit" value="Update Chart" />

</form:form>

Answer 1

确保您的 Spring 表单提及 modelAttribute="<Model Name" .

示例:

@Controller
@RequestMapping("/greeting.html")
public class GreetingController {

 @ModelAttribute("greeting")
 public Greeting getGreetingObject() {
  return new Greeting();
 }

 /**
  * GET
  * 
  * 
  */
 @RequestMapping(method = RequestMethod.GET)
 public String handleRequest() {
  return "greeting";
 }

 /**
  * POST
  * 
  * 
  */
 @RequestMapping(method = RequestMethod.POST)
 public ModelAndView processSubmit(@ModelAttribute("greeting") Greeting greeting, BindingResult result){
  ModelAndView mv = new ModelAndView();
  mv.addObject("greeting", greeting);  
  return mv;
 }
}

在您的 JSP 中:

<form:form  modelAttribute="greeting" method="POST" action="greeting.html">