彈簧引導+ thymeleaf CRUD：編輯一行

我在春天啓動一個biginner，我有這個表至極有一個編輯按鈕的每一行彈簧引導+ thymeleaf CRUD：編輯一行

<td><a th:href="@{/appel/edit/{id}(id=${appel.id})}">edit</a></td>

這是它的控制器：

@RequestMapping(value= "/appel/edit/{id}", method = RequestMethod.GET) 
    public String editapl(@PathVariable("id") Long id, ModelMap model) { 
    model.put("editappel", appelService.findAppelById(id)); 
       return "edit"; 

    }

當我點擊「編輯」它應該是帶我到編輯視圖，這樣我就可以開始編輯

<form action="#" th:action="@{/update}" th:object="${editappel}" method="post"> 
 
\t \t \t <div class="form-control"> 
 
\t \t \t \t <label class="header"> id <span>:</span></label> 
 
\t \t \t \t <input type="hidden" id="name" th:field="*{id}"/> 
 
\t \t \t </div> 
 
\t \t 
 
\t \t 
 
\t \t \t <div class="form-control"> \t 
 
\t \t \t \t <label class="header">Service Code <span>:</span></label> \t 
 
\t \t \t \t <input type="tel" id="usrtel" th:field="*{serviceCode}" required=""/> 
 
\t \t \t </div> \t 
 
\t \t \t 
 
\t \t \t <div class="form-control"> 
 
\t \t \t \t <label class="enquiry">Description <span>:</span></label> 
 
\t \t \t \t <textarea id="message" th:field="*{description}" ></textarea> 
 
\t \t \t \t <div class="clear"></div> 
 
\t \t \t </div> 
 
\t \t \t 
 
\t \t \t <div class="form-control"> 
 
\t \t \t \t <label class="enquiry">answer <span>:</span></label> 
 
\t \t \t \t <textarea id="answer" th:field="*{answer}" ></textarea> 
 
\t \t \t \t <div class="clear"></div> 
 
\t \t \t </div> 
 
\t \t \t 
 
\t \t \t 
 
\t \t \t <div class="form-control"> 
 
\t \t \t \t <input type="reset" class="reset" value="Reset"/> 
 
\t \t \t \t <input type="submit" class="register" value="save changes" /> 
 
\t \t \t \t <div class="clear"></div> 
 
\t \t \t </div> \t 
 
\t \t </form>

，這裏是它的控制器：

@RequestMapping(value="/update",method=RequestMethod.POST) 
public String saveAppel(@ModelAttribute("editappel") Appel editappel,BindingResult result, ModelMap model) 
{if (result.hasErrors()) { 
    return "edit";} 


    appelRepository.save(editappel); 
     return "index";}

的問題是，當我點擊編輯就帶我到白色標籤的錯誤頁面，當我檢查堆棧跟蹤，它提這：既沒有BindingResult，也沒有作爲請求屬性可用的bean名稱「editappel」的普通目標對象，我無法弄清楚問題出在哪裏？

這是堆棧跟蹤

java.lang.IllegalStateException：既不BindingResult也不對豆名「APPEL」可作爲在org.springframework.web.servlet.support.BindStatus請求屬性平原目標對象（爲bindStatus。 .java：144）〜[spring-webmvc-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.thymeleaf.spring4.util.FieldUtils.getBindStatusFromParsedExpression（FieldUtils.java:401）〜[thymeleaf-spring4 -2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.spring4.util.FieldUtils.getBindStatus（FieldUtils.java:328）〜[thymeleaf-spring4-2.1.5.RELEASE.jar：2.1 .5.RELEASE] at org.thymeleaf.spring4.util.FieldUtils.getBindStatus（FieldUtil s.java:294）〜[thymeleaf-spring4-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.spring4.processor.attr.AbstractSpringFieldAttrProcessor.processAttribute（AbstractSpringFieldAttrProcessor.java:98）〜[ thymeleaf-spring4-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.processor.attr.AbstractAttrProcessor.doProcess（AbstractAttrProcessor.java:87）〜[thymeleaf-2.1.5.RELEASE.jar： 2.1.5.RELEASE] at org.thymeleaf.processor.AbstractProcessor.process（AbstractProcessor.java:212）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom。 Node.applyNextProcessor（Node.java:1017）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.Node.processNode（Node.java:972）〜[thymeleaf- 2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695）〜[thymel eaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5。發佈] at org.thymeleaf.dom.Node.processNode（Node.java:990）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode.computeNextChild（ NestableNode.java:695）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.5。 RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.Node.processNode（Node.java:990）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org。 thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode.doAdditionalProcess（ NestableNode.java:668）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org。thymeleaf.dom.Node.processNode（Node.java:990）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.5.RELEASE.jar：2.1。 5.RELEASE] at org.thymeleaf.dom.Node.processNode（Node.java:990）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode。 computeNextChild（NestableNode.java:695）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1。 5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.Node.processNode（Node.java:990）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode.doAdditionalProcess（NestableNode.java ：668）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.Node.processNode（Node.java:990）〜[thymeleaf-2.1.5.RELEASE.jar ：2.1.5.RELEASE] at org.thymeleaf.dom.NestableNode.computeNextChild（NestableNode.java:695）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom .NestableNode.doAdditionalProcess（NestableNode.java:668）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.Node.processNode（Node.java:990）〜[thymeleaf -2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.dom.Document.process（Document.java:93）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE ] at org.thymeleaf.TemplateEngine.process（TemplateEngine.java:1155）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.TemplateEngine.process（TemplateEngine.java:1060）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.TemplateEngine.process（TemplateEngine.java:1011）〜[thymeleaf-2.1.5.RELEASE.jar：2.1.5。發佈] at org.thymeleaf.spring4.view.ThymeleafView.renderFragment（ThymeleafView.java:335）〜[thymeleaf-spring4-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.thymeleaf.spring4。 view.ThymeleafView.render（ThymeleafView.java:190）〜[thymeleaf-spring4-2.1.5.RELEASE.jar：2.1.5.RELEASE] at org.springframework.web.servlet.DispatcherServlet.render（DispatcherServlet.java： 1286）〜[spring-webmvc-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.web.servlet.DispatcherServlet.pr在org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:984）〜[[]中調用ocessDispatchResult（DispatcherServlet.java:1041）〜[spring-webmvc-4.3.10.RELEASE.jar：4.3.10.RELEASE] 〜 spring-webmvc-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:901）〜[spring-webmvc-4.3.10.RELEASE。 jar：4.3.10.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:970）〜[spring-webmvc-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:861）〜[spring-webmvc-4.3.10.RELEASE.jar：4.3.10.RELEASE] at javax.servlet.http.HttpServlet.service（ HttpServlet.java:635）〜[tomcat-embed-core-8.5.16.jar：8.5.16] at org.springframework.web.servle t.FrameworkServlet.service（FrameworkServlet.java:846）〜[spring-webmvc-4.3.10.RELEASE.jar：4.3.10.RELEASE] at javax.servlet.http.HttpServlet.service（HttpServlet.java:742）〜[tomcat-embed-core-8.5.16.jar：8.5.16] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:231）〜[tomcat-embed-core-8.5.16。 jar：8.5.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）〜[tomcat-embed-core-8.5.16.jar：8.5.16] at org.apache。 tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）〜[tomcat-embed-websocket-8.5.16.jar：8.5.16] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain。 java：193）〜[tomcat-embed-core-8.5.16.jar：8.5.16] at org.apache.catalina.core.ApplicationFilterChain。doFilter（ApplicationFilterChain.java:166）〜[tomcat-embed-core-8.5.16.jar：8.5.16] at org.springframework.web.filter.RequestContextFilter.doFilterInternal（RequestContextFilter.java:99）〜[spring- web-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）〜[spring-web-4.3.10.RELEASE.jar： 4.3.10.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）〜[tomcat-embed-core-8.5.16.jar：8.5.16] at org.apache。 catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）〜[tomcat-embed-core-8.5.16.jar：8.5.16] at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal（HttpPutFormContentFilter.java： 105）〜[spring-web-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）〜[spring-web-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.apache.catalina.core。 ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）〜[tomcat-embed-core-8.5.16.jar：8.5.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）〜[ tomcat-embed-core-8.5.16.jar：8.5.16] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal（HiddenHttpMethodFilter.java:81）〜[spring-web-4.3.10.RELEASE.jar： 4.3.10.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）〜[spring-web-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org。 apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）〜[tomcat-embed-core -8.5.16.jar：8.5.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）〜[tomcat-embed-core-8.5.16.jar：8.5.16] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal（CharacterEncodingFilter.java:197）〜[spring-web-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.springframework.web.filter.OncePerRequestFilter .doFilter（OncePerRequestFilter.java:107）〜[spring-web-4.3.10.RELEASE.jar：4.3.10.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）〜 [tomcat-embed-core-8.5.16.jar：8.5.16] at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）〜[tomcat-embed-core-8.5.16.jar ：8.5.16] at org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.j ava：198）〜[tomcat-embed-core-8.5.16.jar：8.5.16] at org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:96）[tomcat-embed-core-8.5 .16.jar：8.5.16] at org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:478）[tomcat-embed-core-8.5.16.jar：8.5.16] at org。 apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:140）[tomcat-embed-core-8.5.16.jar：8.5.16] at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java ：80）[tomcat-embed-core-8.5.16.jar：8.5.16] at org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:87）[tomcat-embed-core-8.5.16 .jar：8.5.16] at org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:342）[tomcat-embed-core-8.5.16.jar：8.5.16]org.apache.coyote.AbstractProcessorLight.process（AbstractProcessorLight（））; .java：66）[tomcat-embed-core-8.5.16.jar：8.5.16] at org.apache.coyote.AbstractProtocol $ ConnectionHandler.process（AbstractProtocol.java:868）[tomcat-embed-core-8.5 .16.jar：8.5.16] at org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.doRun（NioEndpoint.java:1455）[tomcat-embed-core-8.5.16.jar：8.5.16] at org.apache.tomcat.util.net.SocketProcessorBase.run（SocketProcessorBase.java:49）[tomcat-embed-core-8.5.16.jar：8.5.16] at java.util.concurrent.ThreadPoolExecutor.runWorker （Unknown Source）[na：1.8.0_144] at java.util.concurrent.ThreadPoolExecutor $ Worker.run（Unknown Source）[na：1.8。0_144] at org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）[tomcat-embed-core-8.5.16.jar：8.5.16] at java.lang.Thread .RUN（來源不明）NA：1.8.0_144]

來源

2017-08-30 sana ch

你檢查，如果'appelService.findAppelById（ID）'是'返回null'？ – davioooh

您能否粘貼錯誤的整個堆棧跟蹤？也許會有提示，因爲你的代碼看起來好像IMO。 –

@davioooh：它返回null –

通過更換您的TD語法：

<td><a th:href="@{'/appel/edit/' + ${appel.id}}">edit</a></td>

來源

2017-09-05 12:33:34 cralfaro

謝謝so muchhhhh it workes now –

彈簧引導+ thymeleaf CRUD：編輯一行

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