Here, we will introduce the details of the error that occurred and how to deal with it.
* In Eclipse, when I right-clicked the project → Selected "Run" > "Spring Boot Application" and ran it, no error occurred, but when I ran the jar file, an error occurred.
Environment
・Windows 10 64bit・Java 8
・Spring Boot 2.1.3（Spring Tool Suite 4）
・Maven 3.5.3
・Thymeleaf 3.0.11
Error information that occurred
Error information - Check the content output to the command prompt
When I executed the Spring Boot jar file at the command prompt, the following error was output to the command prompt・Execution command
java -jar XXX.jar
・Error information
2019-05-01 13:28:22.161 ERROR 8224 --- [nio-8080-exec-3] org.thymeleaf.TemplateEngine : [THYMELEAF][http-nio-8080-exec-3] Exception processing template "/customer/list": Error resolving template [/customer/list], template might not exist or might not be accessible by any of the configured Template Resolvers org.thymeleaf.exceptions.TemplateInputException: Error resolving template [/customer/list], template might not exist or might not be accessible by any of the configured Template Resolvers
Cause
There is a problem with the source code of the controller class,
An error occurred because the view stored in the folder "customer" under "/src/main/resources/templates" could not be accessed.
・Source code (controller class)
@GetMapping("/customer/list")
public String list() {
return "/customer/list";
}
How to respond
Modify the controller class source code as follows.The above source code
return "/customer/list";↓
return "customer/list";to correct.
・Supplement
For redirects, a leading "/" is required.
return "redirect:/customer/list";If there is no "/" at the beginning, as shown below, an error will occur.
return "redirect:customer/list";
Rreference
Cannot access templates running Spring Boot with JAR
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