我正在使用Spring Boot，Spring MVC和thymeleaf开发一个Web应用程序。我想创建一个简单的表单页面，用户可以编辑配置属性并保存更改。我在这里已经阅读了相关问题，但仍然很困惑。当我尝试呈现页面时，出现了 IllegalStateException ，无法解决问题。
例外：
org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: "class path resource [templates/test.html]")
at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse(AbstractMarkupTemplateParser.java:241) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE]
..........
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.31.jar:8.5.31]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
Caused by: org.attoparser.ParseException: Error during execution of processor 'org.thymeleaf.spring5.processor.SpringInputGeneralFieldTagProcessor' (template: "test" - line 11, col 36)
at org.attoparser.MarkupParser.parseDocument(MarkupParser.java:393) ~[attoparser-2.0.4.RELEASE.jar:2.0.4.RELEASE]
at org.attoparser.MarkupParser.parse(MarkupParser.java:257) ~[attoparser-2.0.4.RELEASE.jar:2.0.4.RELEASE]
at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse(AbstractMarkupTemplateParser.java:230) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE]
... 58 common frames omitted
Caused by: org.thymeleaf.exceptions.TemplateProcessingException: Error during execution of processor 'org.thymeleaf.spring5.processor.SpringInputGeneralFieldTagProcessor' (template: "test" - line 11, col 36)
at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:117) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE]
at org.thymeleaf.processor.element.AbstractElementTagProcessor.process(AbstractElementTagProcessor.java:95) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE]
..........
at org.thymeleaf.spring5.processor.AbstractSpringFieldTagProcessor.doProcess(AbstractSpringFieldTagProcessor.java:174) ~[thymeleaf-spring5-3.0.9.RELEASE.jar:3.0.9.RELEASE]
at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE]
... 85 common frames omitted
2018-07-27 14:39:47.029 ERROR 2168 --- [nio-8080-exec-1] 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: An error happened during template parsing (template: "class path resource [templates/test.html]")] with root cause
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'props[0]' available as request attribute
at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:153) ~[spring-webmvc-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.web.servlet.support.RequestContext.getBindStatus(RequestContext.java:903) ~[spring-webmvc-5.0.7.RELEASE.jar:5.0.7.RELEASE]
..........
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.31.jar:8.5.31]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
FlumeConfiguration类：
public class FlumeConfiguration {
public String flumeName = "Flume Name";
public List<SinkConfiguration> sinkConfigurationList = new ArrayList<SinkConfiguration>();
public FlumeConfiguration(){
}
public String getFlumeName() {
return flumeName;
}
public void setFlumeName(String flumeName) {
this.flumeName = flumeName;
}
public List<SinkConfiguration> getSinkConfigurationList() {
return sinkConfigurationList;
}
public void setSinkConfigurationList(List<SinkConfiguration> sinkConfigurationList) {
this.sinkConfigurationList = sinkConfigurationList;
}
}
SinkConfiguration类：
public class SinkConfiguration {
public String port;
public List<ConfItem> props = new ArrayList<ConfItem>();
public SinkConfiguration(){
port = "123";
}
public String getPort() {
return port;
}
public void setPort(String port) {
this.port = port;
}
public List<ConfItem> getProps() {
return props;
}
public void setProps(List<ConfItem> props) {
this.props = props;
}
}
ConfItem类：
public class ConfItem {
public String key;
public String value;
public ConfItem(){
}
public ConfItem(String key, String value) {
this.key = key;
this.value = value;
}
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
}
TestController类：
@Controller
public class TestController {
@RequestMapping(value = "/test", method = RequestMethod.GET)
public ModelAndView test(ModelAndView mav) {
FlumeConfiguration conf = new FlumeConfiguration();
SinkConfiguration sinkConfiguration = new SinkConfiguration();
sinkConfiguration.props.add(new ConfItem("port", "211"));
sinkConfiguration.props.add(new ConfItem("ip", "1.1.1.1"));
conf.sinkConfigurationList.add(sinkConfiguration);
mav.setViewName("test");
mav.addObject("conf", conf);
return mav;
}
@RequestMapping(value = "/test", method = RequestMethod.POST)
public String test(@ModelAttribute FlumeConfiguration conf,
BindingResult result, ModelMap model) {
return "ok";
}
}
Test.html
<!DOCTYPE html>
<html lang="en" xmlns:layout="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="#" th:action="@{/test}" method="post" >
<th:block th:each="sink, sinkStat : ${conf.sinkConfigurationList}">
<th:block th:each="pr, prStat : ${sink.props}">
<input type="text" th:field="*{props[__${prStat.index}__].key}" th:value="${pr.key}">
<input type="text" th:field="*{props[__${prStat.index}__].value}" th:value="${pr.value}">
</th:block>
</th:block>
<input type="submit" class="button-primary float-none" />
</form>
</body>
</html>
我希望有足够的信息-如果需要提供更多信息，请告诉我。