Springboot 自定义多个404页面

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在Springboot中，可以通过修改配置、或者在static文件夹下添加error文件夹引入个性化的404模版。但是如果需要针对不同url地址规则，返回不同样式的404页面，则难以实现了。针对这个问题，可以参考如下内容。

例如有两种类型的url：
/admin开头的是后台管理，其他url为常规访问，不考虑安全性的情况下，想返回两种样式的404页面。

Springboot中的错误页面均是由BasicErrorController控制，继承BasicErrorController，重写其中方法即可实现自定义错误页面。
package com.haramasu.daomin2.error;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.web.ErrorProperties;
import org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController;
import org.springframework.boot.web.servlet.error.ErrorAttributes;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Collections;
import java.util.Map;

/**
 * @Auther: DingShuo
 * @Date: 2018/7/23 12:25
 * @Description:
 */
@Controller
@RequestMapping(value = "/error")
public class MyBasicErrorController extends BasicErrorController {
    Logger logger =LoggerFactory.getLogger(MyBasicErrorController.class);

    public MyBasicErrorController(ErrorAttributes errorAttributes, ErrorProperties errorProperties) {
        super(errorAttributes, errorProperties);
    }

    @Override
    public ModelAndView errorhtml(HttpServletRequest request, HttpServletResponse response) {
        HttpStatus status = getStatus(request);
        Map<String, Object> model = Collections.unmodifiableMap(getErrorAttributes(
                request, isIncludeStackTrace(request, MediaType.TEXT_HTML)));
        response.setStatus(status.value());
        ModelAndView modelAndView = resolveErrorView(request, response, status, model);
        if(modelAndView!=null){
            return modelAndView;
        }else {
            String path=model.get("path").toString();
            logger.debug("该地址无法访问:"+path);
            if(path.startsWith("/admin/")){
                return new ModelAndView("error/adminError", model);
            }else {
                return new ModelAndView("error/homeError", model);
            }

        }
    }
    
}
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package com.haramasu.daomin2.error;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.boot.autoconfigure.web.ErrorProperties;
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import org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController;
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import org.springframework.boot.web.servlet.error.ErrorAttributes;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.MediaType;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.servlet.ModelAndView;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.util.Collections;
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import java.util.Map;
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/**
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 * @Auther: DingShuo
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 * @Date: 2018/7/23 12:25
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 * @Description:
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 */
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@Controller
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@RequestMapping(value = "/error")
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public class MyBasicErrorController extends BasicErrorController {
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    Logger logger =LoggerFactory.getLogger(MyBasicErrorController.class);
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    public MyBasicErrorController(ErrorAttributes errorAttributes, ErrorProperties errorProperties) {
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        super(errorAttributes, errorProperties);
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    }
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    @Override
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    public ModelAndView errorHtml(HttpServletRequest request, HttpServletResponse response) {
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        HttpStatus status = getStatus(request);
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        Map<String, Object> model = Collections.unmodifiableMap(getErrorAttributes(
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                request, isIncludeStackTrace(request, MediaType.TEXT_HTML)));
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        response.setStatus(status.value());
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        ModelAndView modelAndView = resolveErrorView(request, response, status, model);
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        if(modelAndView!=null){
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            return modelAndView;
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        }else {
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            String path=model.get("path").toString();
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            logger.debug("该地址无法访问:"+path);
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            if(path.startsWith("/admin/")){
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                return new ModelAndView("error/adminError", model);
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            }else {
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                return new ModelAndView("error/homeError", model);
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            }
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        }
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    }
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}
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需要注意，继承BasicErrorController后的构造函数，会提示errorProperties的bean未被初始化。
可以在@Configration注解的类中初始化bean
package com.haramasu.daomin2.conf;

import org.springframework.boot.autoconfigure.web.ErrorProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @Auther: DingShuo
 * @Date: 2018/7/23 12:08
 * @Description:
 */
@Configuration
public class BeanConfig  {

    @Bean
    public ErrorProperties errorProperties(){
        return new ErrorProperties();
    }
}
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package com.haramasu.daomin2.conf;
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import org.springframework.boot.autoconfigure.web.ErrorProperties;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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/**
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 * @Auther: DingShuo
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 * @Date: 2018/7/23 12:08
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 * @Description:
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 */
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@Configuration
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public class BeanConfig  {
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    @Bean
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    public ErrorProperties errorProperties(){
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        return new ErrorProperties();
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    }
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}
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