springboot - 返回xml error 从自定义的 ErrorController

1、概览

2、在《springboot - 返回JSON error 从自定义的 ErrorController》基础上，做如下调整：

1）、新增Attribute类和Error类

package com.ebc.controller;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Attribute {
    private String key;
    private String value;

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }
}

package com.ebc.controller;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import java.util.List;

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Error {
    @XmlElement(name="attribute")
    private List<Attribute> attributeList;

    public List<Attribute> getAttributeList() {
        return attributeList;
    }

    public void setAttributeList(List<Attribute> attributeList) {
        this.attributeList = attributeList;
    }
}

2）、修改MyCustomErrorController类

import org.springframework.boot.autoconfigure.web.servlet.error.AbstractErrorController;
import org.springframework.boot.web.servlet.error.ErrorAttributes;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * @author www.gomepay.com
 * @date 2019/11/18
 */
@Controller
public class MyCustomErrorController extends AbstractErrorController {
    public MyCustomErrorController(ErrorAttributes errorAttributes) {
        super(errorAttributes);
    }
    @RequestMapping(value = "/error", produces = MediaType.APPLICATION_XML_VALUE)
    @ResponseBody
    public Error handleError(HttpServletRequest request) {
        Map<String, Object> errorAttributes = super.getErrorAttributes(request, true);

        List<Attribute> attributes = new ArrayList<>();
        errorAttributes.forEach((key, value) -> {
            Attribute attribute = new Attribute();
            attribute.setKey(key);
            attribute.setValue(value == null ? "" : value.toString());
            attributes.add(attribute);
        });
        Error error = new Error();
        error.setAttributeList(attributes);
        return error;
    }
    @Override
    public String getErrorPath() {
        return "/error";
    }
}

3、执行

1）、http://localhost:8080/

<?xml version="1.0" encoding="utf-8"?>

<error>
  <attribute>
    <key>timestamp</key>
    <value>Wed Nov 20 17:43:59 GMT+08:00 2019</value>
  </attribute>
  <attribute>
    <key>status</key>
    <value>500</value>
  </attribute>
  <attribute>
    <key>error</key>
    <value>Internal Server Error</value>
  </attribute>
  <attribute>
    <key>message</key>
    <value>test exception</value>
  </attribute>
  <attribute>
    <key>trace</key>
    <value>java.lang.RuntimeException: test exception at com.ebc.controller.MyController.handler(MyController.java:15)。。。</value>
  </attribute>
  <attribute>
    <key>path</key>
    <value>/</value>
  </attribute>
</error>

2）、http://localhost:8080/other

<?xml version="1.0" encoding="utf-8"?>

<error>
  <attribute>
    <key>timestamp</key>
    <value>Wed Nov 20 17:49:51 GMT+08:00 2019</value>
  </attribute>
  <attribute>
    <key>status</key>
    <value>404</value>
  </attribute>
  <attribute>
    <key>error</key>
    <value>Not Found</value>
  </attribute>
  <attribute>
    <key>message</key>
    <value>No message available</value>
  </attribute>
  <attribute>
    <key>path</key>
    <value>/other</value>
  </attribute>
</error>