如何在Spring Boot中创建自定义错误页面

Question

I read the reference from the following url

Customized 404 error page in spring-boot and its working.

In the above document they used .HTML pages. But i need .jsp pages.

src/
+- main/
   +- java/
   +- resources/
       +- public/
           +- error/
           |   +- 404.html

ie. 404.html to 404.jsp

Is it possible?

Answer 1

Yes it is possible.

You just need to configure

InternalViewResolver

as with .jsp extension.

Edit:

Please check the below sample code.

private static final String VIEW_RESOLVER_PREFIX = "your/jsp/location";
private static final String VIEW_RESOLVER_SUFFIX = ".jsp";

@Bean
public ViewResolver viewResolver() {
    InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
    viewResolver.setPrefix(VIEW_RESOLVER_PREFIX);
    viewResolver.setSuffix(VIEW_RESOLVER_SUFFIX);
    return viewResolver;
}

Answer 2

You need first to configure spring boot to use jsp as it is not offered out-of-the-box. In maven pom.xml, add the following dependencies:

    <!-- Need this to compile JSP -->
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.eclipse.jdt.core.compiler</groupId>
        <artifactId>ecj</artifactId>
        <version>4.6.1</version>
        <scope>provided</scope>
    </dependency>
    <!-- JSTL for JSP -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>

In application.properties:

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

The way I have configured it, the .jsp files then need to be in src/main/webapp/WEB-INF/jsp folder so create it if needed. Let's say I then create a file src/main/webapp/WEB-INF/jsp/error/404.jsp. To access it from my controller, I simply refer to it as

return "error/404";

since spring boot will automatically add the view prefix and suffix for me.