when i use jsp,i cant find error.jsp

[wangzhihaolighter]

`pom.xml

<groupId>com.example.springframework.boot</groupId>
    <artifactId>jsp</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>jsp</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</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>
        <!-- Compile -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <!-- Provided -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

my project

my aplication.properties

spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

when i use

return new ModelAndView("error");

i cant find WEB-INF/jsp/error.jsp

when i use

return new ModelAndView("/error");

i can find WEB-INF/jsp/error.jsp

in spring-boot source code BasicErrorController ,it use

   @RequestMapping(
        produces = {"text/html"}
    )
    public ModelAndView errorHtml(HttpServletRequest request, HttpServletResponse response) {
        HttpStatus status = this.getStatus(request);
        Map<String, Object> model = Collections.unmodifiableMap(this.getErrorAttributes(request, this.isIncludeStackTrace(request, MediaType.TEXT_HTML)));
        response.setStatus(status.value());
        ModelAndView modelAndView = this.resolveErrorView(request, response, status, model);
        return modelAndView == null ? new ModelAndView("error", model) : modelAndView;
    }

i guess it is a problem

[wilkinsona]

Sorry, but it's not clear to me what the problem is from a few snippets of code. Can you please describe what you want to be able to do? Once we understand that, we'll be able to tell if your approach is wrong or if your approach is correct and you've found a bug.

[wangzhihaolighter]

when i use freemarker or thymeleaf, make a request to an HTTP server
code throw any RuntimeException can be find templates/error.ftl or templates/error.html
application.properties don't have any configuration
but i use jsp ，i create {src/main}/webapp/WEB-INF/jsp folder, application.properties write

spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

i use this,can find WEB-INF/jsp/welcome.jsp

new ModelAndView("/welcome");

but i use this or throw any RuntimeException ,i cont find WEB-INF/jsp/error.jsp

new ModelAndView("error");

[wilkinsona]

Both throwing a runtime exception and returning a ModelAndView pointing to error work for me with JSPs (I checked using a war file run with java -jar). If you'd like us to spend any more time investigating this, please spend some time producing a minimal example and step-by-step instructions that reproduce the behaviour you have described.

[wangzhihaolighter]

This is my learn demo project linkspring boot learn - jsp

project folder
-src
  -main
    -java
    -resources
    -webapp
      -WEB-INF
        -jsp
          -error.jsp
          -error2.jsp
          -welcome.jsp

code

@GetMapping("/test/error")
    public String error() {
        //cant return error.jsp
        throw new RuntimeException("one error");
    }

    @GetMapping("/to/error")
    public ModelAndView toError() {
        //find WEB-INF/jsp/error.jsp
        //correct
        //return new ModelAndView("/error");

        //error
        //return new ModelAndView("error");

        //spring - BasicErrorController user new ModelAndView("error") cant find error.jsp

        //find WEB-INF/jsp/error2.jsp

        //correct
        //return new ModelAndView("error2");
        return new ModelAndView("/error2");
    }

so,i think BasicErrorController user new ModelAndView("error") error to find error.jsp

[wilkinsona]

Thanks, but that's not quite what I was looking for. I've been able to identify a problem, but I can't tell if it's the problem that you have as you haven't told me what steps to take to reproduce the problem you're seeing. Your sample still looks like an attempt to diagnose a problem rather than to simply reproduce it.

I've opened #12805 for the problem that I've been able to identify. Hopefully this is the same problem as you're seeing. If it's not, please provide the necessary information in this issue and we can re-open it and investigate further.