le modèle peut ne pas exister ou ne pas être accessible par l'un des résolveurs de modèles configurés

Introduction

J'ai récemment écrit un projet java, le framework springboot, et j'ai rencontré ce petit problème.
J'en ai écrit un MyController.java, le code est le suivant :

@Controller
@RequestMapping(path = "/my")
public class MyController {

    Logger logger = LoggerFactory.getLogger(MyController.class);

    /**
     * 测试接口
     */
    @SuppressWarnings("unchecked")
    @RequestMapping("/find")
    public JSONObject findClassExamCount(HttpServletRequest request) throws ParseException {
        logger.info("--------------/my/find---------------");
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","1");
        return jsonObject;
    }

Ensuite http://localhost:8080/my/findlors de l'appel avec le facteur, une erreur est signalée :

{
    "timestamp": "2023-08-02T10:03:02.774+0800",
    "status": 500,
    "error": "Internal Server Error",
    "message": "Error resolving template [my/find], template might not exist or might not be accessible by any of the configured Template Resolvers",
    "trace": "org.thymeleaf.exceptions.TemplateInputException: Error resolving template [my/find], template might not exist or might not be accessible by any of the configured Template Resolvers\r\n\tat org.thymeleaf.engine.TemplateManager.resolveTemplate(TemplateManager.java:869)\r\n\tat org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:607)\r\n\tat org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1098)\r\n\tat org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1072)\r\n\tat org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:362)\r\n\tat org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:189)\r\n\tat org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1370)\r\n\tat org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1116)\r\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1055)\r\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)\r\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)\r\n\tat org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908)\r\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:660)\r\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)\r\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:741)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:90)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:117)\r\n\tat org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:106)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)\r\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)\r\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)\r\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)\r\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)\r\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)\r\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)\r\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)\r\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)\r\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:791)\r\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)\r\n\tat org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)\r\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\r\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\r\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\r\n\tat java.lang.Thread.run(Thread.java:748)\r\n",
    "path": "/my/find"
}

Après avoir regardé le point d'arrêt, returnil n'y a toujours pas d'erreur signalée jusqu'à la méthode, mais une erreur est signalée ultérieurement dans la méthode framework ;
le message d'erreur principal est :
template might not exist or might not be accessible by any of the configured Template Resolvers

Deux, la solution

1. En fait, il suffit de @Controllerle changer . @RestControllercomme suit:

@RestController
@RequestMapping(path = "/my")
public class MyController {

    Logger logger = LoggerFactory.getLogger(MyController.class);

    /**
     * 测试接口
     */
    @SuppressWarnings("unchecked")
    @RequestMapping("/find")
    public JSONObject findClassExamCount(HttpServletRequest request) throws ParseException {
        logger.info("--------------/my/find---------------");
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","1");
        return jsonObject;
    }

2. Alternativement, vous pouvez l'ajouter à l'interface @ResponseBody, comme suit :

@Controller
@RequestMapping(path = "/my")
public class MyController {

    Logger logger = LoggerFactory.getLogger(MyController.class);

    /**
     * 测试接口
     */
    @SuppressWarnings("unchecked")
    @RequestMapping("/find")
    @ResponseBody
    public JSONObject findClassExamCount(HttpServletRequest request) throws ParseException {
        logger.info("--------------/my/find---------------");
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","1");
        return jsonObject;
    }

3. Utilisez postman pour appeler, la valeur de retour est normale :

{
    "code": "1"
}