java - 带有 Thymeleaf、BindingResult 或 bean 名称“用户”的普通目标对象的 Spring 可用作请求属性
问题描述
我使用 Thymeleaf 和 Spring 创建了一个表单并遇到了这个问题。我也读过这个问题，但它对我不起作用
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>mz.painting</groupId>
<artifactId>mz</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>M&Z Painting</name>
<description>Web Application for M&Z </description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf-spring5</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate.validator</groupId>
<artifactId>hibernate-validator</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
控制器更新
@Controller
public class SavingUser{
@Autowired
private UserRepository userRepository;
@GetMapping("/addUser")
public String addUser(Model model){
System.out.println("Adding User in registration page..");
model.addAttribute("user", new Customer());
return "service";
}
@PostMapping("/registerUser")
public String userRegistration(@ModelAttribute Customer user, Model model){
System.out.println("User in registration page..");
model.addAttribute("user", user);
// userRepository.save(user);
return "redirect:/service";
}
**Bean Class**
Getters()
Setters()
toString()
HTML 表单
<div id="form">
<form action="registerUser" th:action="@{/registerUser}"
th:object="${user}" method="POST">
<br />
<label>Your Name:</label><br />
<input type="text" th:field="*{name}" placeholder="" /><br>
<label >Your Suburb</label><br />
<input type="text" th:field="*{suburb}" placeholder="" /><br />
<label>Email</label><br/>
<input type="email" th:field="*{email}" placeholder="" /><br />
<label>Phone</label><br/>
<input type="tel" th:field="*{phone}" placeholder="" /><br />
<label>Please tell us how we can help</label><br />
<textarea type="text" th:field="*{text}" rows="10" cols="40"></textarea><br />
<div>
<input class="submit" type="submit" value="Submit" /><br/><br/>
</div>
</form>
</div>
完整的错误信息
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: Error during execution of processor 'org.thymeleaf.spring5.processor.SpringInputGeneralFieldTagProcessor' (template: "index" - line 86, col 32)] with root cause
“索引” - 第 86 行，第 32 列）] 在 HTML 表单中是这样的 ->
<input type="text" th:field="*{name}" placeholder="" /><br>
我也检查了这个解决方案，它对我不起作用
更新 终端页面
"C:\Program Files\Java\jdk-13.0.1\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2020.1.2\lib\idea_rt.jar=49969:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2020.1.2\bin" -Dfile.encoding=UTF-8 -classpath C:\Users\shuja\Desktop\mz\target\classes;C:\Users\shuja\.m2\repository\org\springframework\boot\spring-boot-starter\2.5.3\spring-boot-starter-2.5.3.jar;C:\Users\shuja\.m2\repository\org\springframework\boot\spring-boot\2.5.3\spring-boot-2.5.3.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-context\5.3.9\spring-context-5.3.9.jar;C:\Users\shuja\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\2.5.3\spring-boot-autoconfigure-2.5.3.jar;C:\Users\shuja\.m2\repository\org\springframework\boot\spring-boot-starter-logging\2.5.3\spring-boot-starter-logging-2.5.3.jar;C:\Users\shuja\.m2\repository\ch\qos\logback\logback-classic\1.2.4\logback-classic-1.2.4.jar;C:\Users\shuja\.m2\repository\ch\qos\logback\logback-core\1.2.4\logback-core-1.2.4.jar;C:\Users\shuja\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.14.1\log4j-to-slf4j-2.14.1.jar;C:\Users\shuja\.m2\repository\org\apache\logging\log4j\log4j-api\2.14.1\log4j-api-2.14.1.jar;C:\Users\shuja\.m2\repository\org\slf4j\jul-to-slf4j\1.7.32\jul-to-slf4j-1.7.32.jar;C:\Users\shuja\.m2\repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-core\5.3.9\spring-core-5.3.9.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-jcl\5.3.9\spring-jcl-5.3.9.jar;C:\Users\shuja\.m2\repository\org\yaml\snakeyaml\1.28\snakeyaml-1.28.jar;C:\Users\shuja\.m2\repository\org\springframework\boot\spring-boot-starter-web\2.5.3\spring-boot-starter-web-2.5.3.jar;C:\Users\shuja\.m2\repository\org\springframework\boot\spring-boot-starter-json\2.5.3\spring-boot-starter-json-2.5.3.jar;C:\Users\shuja\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.12.4\jackson-databind-2.12.4.jar;C:\Users\shuja\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.12.4\jackson-annotations-2.12.4.jar;C:\Users\shuja\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.12.4\jackson-core-2.12.4.jar;C:\Users\shuja\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.12.4\jackson-datatype-jdk8-2.12.4.jar;C:\Users\shuja\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.12.4\jackson-datatype-jsr310-2.12.4.jar;C:\Users\shuja\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.12.4\jackson-module-parameter-names-2.12.4.jar;C:\Users\shuja\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\2.5.3\spring-boot-starter-tomcat-2.5.3.jar;C:\Users\shuja\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\9.0.50\tomcat-embed-core-9.0.50.jar;C:\Users\shuja\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\9.0.50\tomcat-embed-el-9.0.50.jar;C:\Users\shuja\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.50\tomcat-embed-websocket-9.0.50.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-web\5.3.9\spring-web-5.3.9.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-beans\5.3.9\spring-beans-5.3.9.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-webmvc\5.3.9\spring-webmvc-5.3.9.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-aop\5.3.9\spring-aop-5.3.9.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-expression\5.3.9\spring-expression-5.3.9.jar;C:\Users\shuja\.m2\repository\org\thymeleaf\thymeleaf\3.0.12.RELEASE\thymeleaf-3.0.12.RELEASE.jar;C:\Users\shuja\.m2\repository\ognl\ognl\3.1.26\ognl-3.1.26.jar;C:\Users\shuja\.m2\repository\org\javassist\javassist\3.20.0-GA\javassist-3.20.0-GA.jar;C:\Users\shuja\.m2\repository\org\attoparser\attoparser\2.0.5.RELEASE\attoparser-2.0.5.RELEASE.jar;C:\Users\shuja\.m2\repository\org\unbescape\unbescape\1.1.6.RELEASE\unbescape-1.1.6.RELEASE.jar;C:\Users\shuja\.m2\repository\org\slf4j\slf4j-api\1.7.32\slf4j-api-1.7.32.jar;C:\Users\shuja\.m2\repository\org\springframework\boot\spring-boot-starter-thymeleaf\2.5.3\spring-boot-starter-thymeleaf-2.5.3.jar;C:\Users\shuja\.m2\repository\org\thymeleaf\extras\thymeleaf-extras-java8time\3.0.4.RELEASE\thymeleaf-extras-java8time-3.0.4.RELEASE.jar;C:\Users\shuja\.m2\repository\org\thymeleaf\thymeleaf-spring5\3.0.12.RELEASE\thymeleaf-spring5-3.0.12.RELEASE.jar;C:\Users\shuja\.m2\repository\org\springframework\boot\spring-boot-starter-data-jpa\2.5.3\spring-boot-starter-data-jpa-2.5.3.jar;C:\Users\shuja\.m2\repository\org\springframework\boot\spring-boot-starter-aop\2.5.3\spring-boot-starter-aop-2.5.3.jar;C:\Users\shuja\.m2\repository\org\aspectj\aspectjweaver\1.9.7\aspectjweaver-1.9.7.jar;C:\Users\shuja\.m2\repository\org\springframework\boot\spring-boot-starter-jdbc\2.5.3\spring-boot-starter-jdbc-2.5.3.jar;C:\Users\shuja\.m2\repository\com\zaxxer\HikariCP\4.0.3\HikariCP-4.0.3.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-jdbc\5.3.9\spring-jdbc-5.3.9.jar;C:\Users\shuja\.m2\repository\jakarta\transaction\jakarta.transaction-api\1.3.3\jakarta.transaction-api-1.3.3.jar;C:\Users\shuja\.m2\repository\jakarta\persistence\jakarta.persistence-api\2.2.3\jakarta.persistence-api-2.2.3.jar;C:\Users\shuja\.m2\repository\org\hibernate\hibernate-core\5.4.32.Final\hibernate-core-5.4.32.Final.jar;C:\Users\shuja\.m2\repository\net\bytebuddy\byte-buddy\1.10.22\byte-buddy-1.10.22.jar;C:\Users\shuja\.m2\repository\antlr\antlr\2.7.7\antlr-2.7.7.jar;C:\Users\shuja\.m2\repository\org\jboss\jandex\2.2.3.Final\jandex-2.2.3.Final.jar;C:\Users\shuja\.m2\repository\org\dom4j\dom4j\2.1.3\dom4j-2.1.3.jar;C:\Users\shuja\.m2\repository\org\hibernate\common\hibernate-commons-annotations\5.1.2.Final\hibernate-commons-annotations-5.1.2.Final.jar;C:\Users\shuja\.m2\repository\org\glassfish\jaxb\jaxb-runtime\2.3.4\jaxb-runtime-2.3.4.jar;C:\Users\shuja\.m2\repository\org\glassfish\jaxb\txw2\2.3.4\txw2-2.3.4.jar;C:\Users\shuja\.m2\repository\com\sun\istack\istack-commons-runtime\3.0.12\istack-commons-runtime-3.0.12.jar;C:\Users\shuja\.m2\repository\com\sun\activation\jakarta.activation\1.2.2\jakarta.activation-1.2.2.jar;C:\Users\shuja\.m2\repository\org\springframework\data\spring-data-jpa\2.5.3\spring-data-jpa-2.5.3.jar;C:\Users\shuja\.m2\repository\org\springframework\data\spring-data-commons\2.5.3\spring-data-commons-2.5.3.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-orm\5.3.9\spring-orm-5.3.9.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-tx\5.3.9\spring-tx-5.3.9.jar;C:\Users\shuja\.m2\repository\org\springframework\spring-aspects\5.3.9\spring-aspects-5.3.9.jar;C:\Users\shuja\.m2\repository\mysql\mysql-connector-java\8.0.26\mysql-connector-java-8.0.26.jar;C:\Users\shuja\.m2\repository\jakarta\xml\bind\jakarta.xml.bind-api\2.3.3\jakarta.xml.bind-api-2.3.3.jar;C:\Users\shuja\.m2\repository\jakarta\activation\jakarta.activation-api\1.2.2\jakarta.activation-api-1.2.2.jar;C:\Users\shuja\.m2\repository\javax\validation\validation-api\2.0.1.Final\validation-api-2.0.1.Final.jar;C:\Users\shuja\.m2\repository\org\hibernate\validator\hibernate-validator\6.2.0.Final\hibernate-validator-6.2.0.Final.jar;C:\Users\shuja\.m2\repository\jakarta\validation\jakarta.validation-api\2.0.2\jakarta.validation-api-2.0.2.jar;C:\Users\shuja\.m2\repository\org\jboss\logging\jboss-logging\3.4.2.Final\jboss-logging-3.4.2.Final.jar;C:\Users\shuja\.m2\repository\com\fasterxml\classmate\1.5.1\classmate-1.5.1.jar mz.painting.com.Application
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.5.3)
2021-09-07 23:03:00.710 INFO 13304 --- [ main] mz.painting.com.Application : Starting Application using Java 13.0.1 on DESKTOP-2FIIHFN with PID 13304 (C:\Users\shuja\Desktop\mz\target\classes started by shuja in C:\Users\shuja\Desktop\mz)
2021-09-07 23:03:00.798 INFO 13304 --- [ main] mz.painting.com.Application : No active profile set, falling back to default profiles: default
2021-09-07 23:03:09.837 INFO 13304 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2021-09-07 23:03:10.394 INFO 13304 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 475 ms. Found 1 JPA repository interfaces.
2021-09-07 23:03:17.773 INFO 13304 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-09-07 23:03:17.874 INFO 13304 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-09-07 23:03:17.874 INFO 13304 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.50]
2021-09-07 23:03:18.723 INFO 13304 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-09-07 23:03:18.723 INFO 13304 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 16400 ms
2021-09-07 23:03:19.900 INFO 13304 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2021-09-07 23:03:20.230 INFO 13304 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.32.Final
2021-09-07 23:03:20.927 INFO 13304 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2021-09-07 23:03:21.830 INFO 13304 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2021-09-07 23:03:26.191 INFO 13304 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2021-09-07 23:03:26.507 INFO 13304 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect
2021-09-07 23:03:31.234 INFO 13304 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2021-09-07 23:03:31.296 INFO 13304 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2021-09-07 23:03:33.646 WARN 13304 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2021-09-07 23:03:35.159 INFO 13304 --- [ main] o.s.b.a.w.s.WelcomePageHandlerMapping : Adding welcome page: class path resource [static/index.html]
2021-09-07 23:03:35.961 WARN 13304 --- [ main] ion$DefaultTemplateResolverConfiguration : Cannot find template location: classpath:/templates/ (please add some templates or check your Thymeleaf configuration)
2021-09-07 23:03:37.067 INFO 13304 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-09-07 23:03:37.116 INFO 13304 --- [ main] mz.painting.com.Application : Started Application in 42.214 seconds (JVM running for 50.262)
2021-09-07 23:04:09.649 INFO 13304 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2021-09-07 23:04:09.649 INFO 13304 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2021-09-07 23:04:09.658 INFO 13304 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 9 ms
User is in Homepage
2021-09-07 23:04:12.849 ERROR 13304 --- [nio-8080-exec-1] org.thymeleaf.TemplateEngine : [THYMELEAF][http-nio-8080-exec-1] Exception processing template "index": Error during execution of processor 'org.thymeleaf.spring5.processor.SpringInputGeneralFieldTagProcessor' (template: "index" - line 86, col 32)
org.thymeleaf.exceptions.TemplateProcessingException: Error during execution of processor 'org.thymeleaf.spring5.processor.SpringInputGeneralFieldTagProcessor' (template: "index" - line 86, col 32)
at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:117) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.processor.element.AbstractElementTagProcessor.process(AbstractElementTagProcessor.java:95) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.util.ProcessorConfigurationUtils$ElementTagProcessorWrapper.process(ProcessorConfigurationUtils.java:633) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.engine.ProcessorTemplateHandler.handleStandaloneElement(ProcessorTemplateHandler.java:918) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.engine.StandaloneElementTag.beHandled(StandaloneElementTag.java:228) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.engine.TemplateModel.process(TemplateModel.java:136) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:661) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1098) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1072) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:366) ~[thymeleaf-spring5-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:190) ~[thymeleaf-spring5-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1397) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1142) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1081) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.9.jar:5.3.9]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.50.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.9.jar:5.3.9]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.50.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:228) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.50.jar:9.0.50]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.9.jar:5.3.9]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.9.jar:5.3.9]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.9.jar:5.3.9]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.9.jar:5.3.9]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:190) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:163) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1723) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.50.jar:9.0.50]
at java.base/java.lang.Thread.run(Thread.java:830) ~[na:na]
Caused by: java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'user' available as request attribute
at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:153) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.springframework.web.servlet.support.RequestContext.getBindStatus(RequestContext.java:903) ~[spring-webmvc-5.3.9.jar:5.3.9]
at org.thymeleaf.spring5.context.webmvc.SpringWebMvcThymeleafRequestContext.getBindStatus(SpringWebMvcThymeleafRequestContext.java:227) ~[thymeleaf-spring5-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.spring5.util.FieldUtils.getBindStatusFromParsedExpression(FieldUtils.java:306) ~[thymeleaf-spring5-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.spring5.util.FieldUtils.getBindStatus(FieldUtils.java:253) ~[thymeleaf-spring5-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.spring5.util.FieldUtils.getBindStatus(FieldUtils.java:227) ~[thymeleaf-spring5-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.spring5.processor.AbstractSpringFieldTagProcessor.doProcess(AbstractSpringFieldTagProcessor.java:174) ~[thymeleaf-spring5-3.0.12.RELEASE.jar:3.0.12.RELEASE]
at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74) ~[thymeleaf-3.0.12.RELEASE.jar:3.0.12.RELEASE]
... 52 common frames omitted
知道如何解决这个问题吗？谢谢你
解决方案
乍一看，<br>缺少结束标签，Thymeleaf 处理器可能会抱怨它。
应该是
<input type="text" th:field="*{name}" placeholder="" /><br />。注意 的结尾斜线<br />。
您准确地在指定实际原因的位置删除异常消息，即 after with root cause [...]。:)
推荐阅读
- php - 在选择期间将 MySQL TIMESTAMP 转换为另一个时区
- c - 无法在 Linux 内核中设置 IRQ 的触发类型
- c++ - 检查字符串是否只包含 1 和 0 的程序？
- python - 在线性问题中定义多个约束后，获取当前可能接受的变量边界
- amazon-web-services - 为外部最终用户和内部系统保护 AWS API Gateway
- embedded - 保存并恢复 Semtech SX1276 状态
- javascript - 隐藏 asp:Image SVG 元素
- python-3.x - 基于 Google Discovery 的 API :: 无法创建 API 客户端（SCOPES 错误）
- javascript - React Hooks - 根据条件突出显示星期几
- wordpress - 优化执行需要 20 秒的 Wocommerce Ajax Product Filter 插件查询