springboot - 映射 /error 到自定义且实现了ErrorController的Controller

1、总览

2、代码

1）、pom.xml

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

</dependencies>

2）、application.properties

server.error.whitelabel.enabled=false
server.error.include-stacktrace=always

3）、MyController.java

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class MyController {
    @RequestMapping("/")
    public String handler (Model model) {
        throw new RuntimeException("test exception");
    }
}

4）、MyCustomErrorController.java

import org.springframework.boot.web.servlet.error.ErrorController;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;

/**
 * @author www.gomepay.com
 * @date 2019/11/18
 */
@Controller
public class MyCustomErrorController implements ErrorController {

    @RequestMapping("/error")
    @ResponseBody
    public String handleError(HttpServletRequest request) {
        Integer statusCode = (Integer) request.getAttribute("javax.servlet.error.status_code");
        Exception exception = (Exception) request.getAttribute("javax.servlet.error.exception");
        return String.format("<html><body><h2>Error Page</h2><div>Status code: <b>%s</b></div>"
                        + "<div>Exception Message: <b>%s</b></div><body></html>",
                statusCode, exception==null? "N/A": exception.getMessage());
    }

    @Override
    public String getErrorPath() {
        return "/error";
    }
}

3、执行