遵循网站Roo网站的说明：
mkdir hello
cd hello
roo.sh
roo> project setup --topLevelPackage com.foo
roo> jpa setup --provider HIBERNATE --database HYPERSONIC_IN_MEMORY
roo> entity jpa --class ~.domain.Timer
roo> field string --fieldName message --notNull
roo> repository jpa --all
roo> service --all
roo> web mvc setup
roo> web mvc view setup --type THYMELEAF
roo> web mvc controller --all --responseType THYMELEAF
roo> web mvc controller --all --pathPrefix /api
roo> quit
我跑
mvn package
如Roo参考（https://docs.spring.io/spring-roo/docs/2.0.x/reference/html/#using-spring-roo-create-boot-app）
中所述由于此操作，创建了两个罐子。
target/foo-1.0.0.BUILD-SNAPSHOT.jar
target/foo-1.0.0.BUILD-SNAPSHOT-exec.jar
说明用命令
运行它java -jar target/foo-1.0.0.BUILD-SNAPSHOT.jar
这一切顺利。但是在点击网页上的列表项后，我得到了一个例外。
2017-10-05 14:48:43.940 ERROR 1514 --- [nio-8080-exec-4] org.thymeleaf.TemplateEngine : [THYMELEAF][http-nio-8080-exec-4] Exception processing template "timers/list": Error resolving fragment: "${content}": template or fragment could not be resolved (template: "fragments/modal-confirm-delete" - line 18, col 16)
org.thymeleaf.exceptions.TemplateInputException: Error resolving fragment: "${content}": template or fragment could not be resolved (template: "fragments/modal-confirm-delete" - line 18, col 16)
at org.thymeleaf.standard.processor.AbstractStandardFragmentInsertionTagProcessor.doProcess(AbstractStandardFragmentInsertionTagProcessor.java:116) ~[thymeleaf-3.0.0.RELEASE.jar!/:3.0.0.RELEASE]
at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74) ~[thymeleaf-3.0.0.RELEASE.jar!/:3.0.0.RELEASE]
at org.thymeleaf.processor.element.AbstractElementTagProcessor.process(AbstractElementTagProcessor.java:95) ~[thymeleaf-3.0.0.RELEASE.jar!/:3.0.0.RELEASE]
at org.thymeleaf.util.ProcessorConfigurationUtils$ElementTagProcessorWrapper.process(ProcessorConfigurationUtils.java:633) ~[thymeleaf-3.0.0.RELEASE.jar!/:3.0.0.RELEASE]
at org.thymeleaf.engine.ProcessorTemplateHandler.handleOpenElement(ProcessorTemplateHandler.java:1304) ~[thymeleaf-3.0.0.RELEASE.jar!/:3.0.0.RELEASE]
注意：如果使用
运行应用程序，则不会发生这种情况mvn spring-boot:run
知道我做错了吗？