嗯，我想我是第一个在 Google 上遇到此问题的人!
我有一个正在运行的 Spring Boot 项目，但是当我向模型添加验证并在 Controller 上启用它时，它给出了以下异常:
org.thymeleaf.exceptions.TemplateInputException: Error resolving template "org.springframework.validation.BeanPrope[...]e [Value cannot be empty]", template might not exist or might not be accessible by any of the configured Template Resolvers
at org.thymeleaf.engine.TemplateManager.resolveTemplate(TemplateManager.java:870) ~[thymeleaf-3.0.8.RELEASE.jar:3.0.8.RELEASE]
at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:607) ~[thymeleaf-3.0.8.RELEASE.jar:3.0.8.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1098) [thymeleaf-3.0.8.RELEASE.jar:3.0.8.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1072) [thymeleaf-3.0.8.RELEASE.jar:3.0.8.RELEASE]
at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:355) [thymeleaf-spring5-3.0.8.RELEASE.jar:3.0.8.RELEASE]
at org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:188) [thymeleaf-spring5-3.0.8.RELEASE.jar:3.0.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1325) [spring-webmvc-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1069) [spring-webmvc-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1008) [spring-webmvc-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) [spring-webmvc-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978) [spring-webmvc-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:881) [spring-webmvc-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855) [spring-webmvc-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.servlet.resource.ResourceUrlEncodingFilter.doFilter(ResourceUrlEncodingFilter.java:60) [spring-webmvc-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108) [spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) [spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.0.RELEASE.jar:5.0.0.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.23.jar:8.5.23]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_102]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_102]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.23.jar:8.5.23]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_102]
对我来说很奇怪!听起来不知何故
org.springframework.validation.BeanPrope[...]e [Value cannot be empty]
模板名称放错了位置!!!
这是我的 Maven 依赖项:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.webitalkie</groupId>
<artifactId>web-project</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>instagram-robot</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.M5</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<!-- <exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions> -->
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<!-- Optional, for bootstrap -->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>webjars-locator</artifactId>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>jquery</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>3.3.7</version>
</dependency>
<!-- and the 'Thymeleaf Layout Dialect' -->
<dependency>
<groupId>nz.net.ultraq.thymeleaf</groupId>
<artifactId>thymeleaf-layout-dialect</artifactId>
</dependency>
</dependencies>
<repositories>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</project>
这是用户模型:
package com.webitalkie.web.model;
import javax.validation.constraints.Email;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.Size;
public class User {
@NotBlank(message="{emptyValue}")
@Size(min=2, max=30)
private String firstName;
@NotBlank(message="{emptyValue}")
@Size(min=2, max=30)
private String lastName;
@NotBlank(message="{emptyValue}")
@Size(min=11, max=11)
private String cell;
@Email(message="{invalidEmail}")
private String email;
@NotBlank(message="{emptyValue}")
@Size(min=6, max=30)
private String password;
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getCell() {
return cell;
}
public void setCell(String cell) {
this.cell = cell;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
这是 Controller :
package com.webitalkie.web.controller;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.validation.Valid;
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.CookieValue;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.webitalkie.instagram_robot.model.User;
@Controller
@RequestMapping({"/*/home", "/home"})
@Validated
public class Home {
@Autowired
private HttpSession session;
@GetMapping(path = "/register")
public String register(Map<String, Object> model) {
model.put("user", null);
return "home/register";
}
@PostMapping(path="/createaccount")
public String makeRegister(@Valid @ModelAttribute("user") User user,
@RequestParam(name="confirm_password", required=false) String confirmPassword,
BindingResult result) {
if(result.hasErrors()) {
return "redirect:/home/register";
}
return "redirect:/home/index";
}
}
当我将字段留空并在注册模板中提交表单以创建帐户操作时，它会抛出提到的异常。 如果我删除 makeRegister 方法中的 @Valid 注释，它就可以正常工作!
这是我的整个控制台输出(修剪异常以节省字符数):
2017-12-11 14:28:08.091 INFO 24864 --- [ restartedMain] com.webitalkie.web.App : Starting App on mohamad with PID 24864 (/mnt/backup/MarsWorkplace/web-project/target/classes started by mohamad in /mnt/backup/MarsWorkplace/web-project)
2017-12-11 14:28:08.093 INFO 24864 --- [ restartedMain] com.webitalkie.web.App : No active profile set, falling back to default profiles: default
2017-12-11 14:28:08.418 INFO 24864 --- [ restartedMain] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@6948863d: startup date [Mon Dec 11 14:28:08 IRST 2017]; root of context hierarchy
2017-12-11 14:28:10.444 INFO 24864 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2017-12-11 14:28:10.458 INFO 24864 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2017-12-11 14:28:10.459 INFO 24864 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.23
2017-12-11 14:28:10.680 INFO 24864 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-12-11 14:28:10.681 INFO 24864 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2266 ms
2017-12-11 14:28:10.830 INFO 24864 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-12-11 14:28:10.834 INFO 24864 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-12-11 14:28:10.834 INFO 24864 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-12-11 14:28:10.834 INFO 24864 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-12-11 14:28:10.835 INFO 24864 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2017-12-11 14:28:10.835 INFO 24864 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'resourceUrlEncodingFilter' to: [/*]
2017-12-11 14:28:11.061 INFO 24864 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : testdb - Starting...
2017-12-11 14:28:11.273 INFO 24864 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : testdb - Start completed.
2017-12-11 14:28:11.320 INFO 24864 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2017-12-11 14:28:11.336 INFO 24864 --- [ restartedMain] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2017-12-11 14:28:11.426 INFO 24864 --- [ restartedMain] org.hibernate.Version : HHH000412: Hibernate Core {5.2.11.Final}
2017-12-11 14:28:11.428 INFO 24864 --- [ restartedMain] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2017-12-11 14:28:11.483 INFO 24864 --- [ restartedMain] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2017-12-11 14:28:11.597 INFO 24864 --- [ restartedMain] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5InnoDBDialect
2017-12-11 14:28:11.902 INFO 24864 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2017-12-11 14:28:12.323 INFO 24864 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@6948863d: startup date [Mon Dec 11 14:28:08 IRST 2017]; root of context hierarchy
2017-12-11 14:28:12.410 INFO 24864 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/*/home || /home],methods=[GET]}" onto public java.lang.String com.webitalkie.web.controller.Home.indexWithNoSlash(java.util.Map<java.lang.String, java.lang.Object>)
2017-12-11 14:28:12.411 INFO 24864 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/*/home/ || /home/],methods=[GET]}" onto public java.lang.String com.webitalkie.web.controller.Home.indexWithSlash(java.util.Map<java.lang.String, java.lang.Object>)
2017-12-11 14:28:12.412 INFO 24864 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/*/home/login || /home/login],methods=[GET]}" onto public java.lang.String com.webitalkie.web.controller.Home.login(java.util.Map<java.lang.String, java.lang.Object>)
2017-12-11 14:28:12.412 INFO 24864 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/*/home/createaccount || /home/createaccount],methods=[POST]}" onto public java.lang.String com.webitalkie.web.controller.Home.makeRegister(com.webitalkie.web.model.User,java.lang.String,org.springframework.validation.BindingResult,javax.servlet.http.HttpServletResponse)
2017-12-11 14:28:12.413 INFO 24864 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/*/home/index || /home/index],methods=[GET]}" onto public java.lang.String com.webitalkie.web.controller.Home.index(java.util.Map<java.lang.String, java.lang.Object>)
2017-12-11 14:28:12.413 INFO 24864 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/*/home/register || /home/register],methods=[GET]}" onto public java.lang.String com.webitalkie.web.controller.Home.register(java.util.Map<java.lang.String, java.lang.Object>,javax.servlet.http.HttpServletResponse,java.lang.String)
2017-12-11 14:28:12.418 INFO 24864 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2017-12-11 14:28:12.419 INFO 24864 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2017-12-11 14:28:12.496 INFO 24864 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-12-11 14:28:12.497 INFO 24864 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-12-11 14:28:12.542 INFO 24864 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-12-11 14:28:13.115 INFO 24864 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2017-12-11 14:28:13.224 INFO 24864 --- [ restartedMain] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-12-11 14:28:13.226 INFO 24864 --- [ restartedMain] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'dataSource' has been autodetected for JMX exposure
2017-12-11 14:28:13.232 INFO 24864 --- [ restartedMain] o.s.j.e.a.AnnotationMBeanExporter : Located MBean 'dataSource': registering with JMX server as MBean [com.zaxxer.hikari:name=dataSource,type=HikariDataSource]
2017-12-11 14:28:13.285 INFO 24864 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http)
2017-12-11 14:28:13.290 INFO 24864 --- [ restartedMain] com.webitalkie.web.App : Started App in 5.52 seconds (JVM running for 6.051)
2017-12-11 14:28:27.279 INFO 24864 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2017-12-11 14:28:27.279 INFO 24864 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2017-12-11 14:28:27.294 INFO 24864 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 14 ms
2017-12-11 14:28:27.929 WARN 24864 --- [nio-8080-exec-1] n.n.u.t.expressions.ExpressionProcessor : Fragment expression "layout" is being wrapped as a Thymeleaf 3 fragment expression (~{...}) for backwards compatibility purposes. This wrapping will be dropped in the next major version of the expression processor, so please rewrite as a Thymeleaf 3 fragment expression to future-proof your code. See https://github.com/thymeleaf/thymeleaf/issues/451 for more information.
2017-12-11 14:28:31.488 WARN 24864 --- [nio-8080-exec-8] .m.m.a.ExceptionHandlerExceptionResolver : Resolved exception caused by Handler execution: org.springframework.validation.BindException: org.springframework.validation.BeanPropertyBindingResult: 4 errors
Field error in object 'user' on field 'lastName': rejected value [null]; codes [NotBlank.user.lastName,NotBlank.lastName,NotBlank.java.lang.String,NotBlank]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [user.lastName,lastName]; arguments []; default message [lastName]]; default message [Value cannot be empty]
Field error in object 'user' on field 'password': rejected value [null]; codes [NotBlank.user.password,NotBlank.password,NotBlank.java.lang.String,NotBlank]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [user.password,password]; arguments []; default message [password]]; default message [Value cannot be empty]
Field error in object 'user' on field 'cell': rejected value [null]; codes [NotBlank.user.cell,NotBlank.cell,NotBlank.java.lang.String,NotBlank]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [user.cell,cell]; arguments []; default message [cell]]; default message [Value cannot be empty]
Field error in object 'user' on field 'firstName': rejected value [null]; codes [NotBlank.user.firstName,NotBlank.firstName,NotBlank.java.lang.String,NotBlank]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [user.firstName,firstName]; arguments []; default message [firstName]]; default message [Value cannot be empty]
2017-12-11 14:28:31.497 ERROR 24864 --- [nio-8080-exec-8] org.thymeleaf.TemplateEngine : [THYMELEAF][http-nio-8080-exec-8] Exception processing template "org.springframework.validation.BeanPrope[...]e [Value cannot be empty]": Error resolving template "org.springframework.validation.BeanPrope[...]e [Value cannot be empty]", template might not exist or might not be accessible by any of the configured Template Resolvers
org.thymeleaf.exceptions.TemplateInputException: Error resolving template "org.springframework.validation.BeanPrope[...]e [Value cannot be empty]", template might not exist or might not be accessible by any of the configured Template Resolvers
at org.thymeleaf.engine.TemplateManager.resolveTemplate(TemplateManager.java:870) ~[thymeleaf-3.0.8.RELEASE.jar:3.0.8.RELEASE]
2017-12-11 14:28:31.499 ERROR 24864 --- [nio-8080-exec-8] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateInputException: Error resolving template "org.springframework.validation.BeanPrope[...]e [Value cannot be empty]", template might not exist or might not be accessible by any of the configured Template Resolvers] with root cause
org.thymeleaf.exceptions.TemplateInputException: Error resolving template "org.springframework.validation.BeanPrope[...]e [Value cannot be empty]", template might not exist or might not be accessible by any of the configured Template Resolvers
你们有什么想法吗？
最佳答案
正如 the reference guide 中明确指出的.
Validation results for the command/form object data binding; this argument must be declared immediately after the command/form object in the controller method signature.
因此，您的 BindingResult 必须直接遵循您的 @ModelAttribute 带注释的方法。如果不是这种情况，那么当验证失败时，将抛出异常。
关于java - 向模型添加验证后出现 Spring Boot 异常，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47751827/