SpringBoot 配置全局异常统一处理

@Controller
@RequestMapping("${server.error.path:${error.path:/error}}")
public class BasicErrorController extends AbstractErrorController {
    // 统一异常处理（View）
    @RequestMapping(produces = "text/html")
    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);
        return (modelAndView == null ? new ModelAndView("error", model) : modelAndView);
    }

package com.hehe.error;

@ControllerAdvice
public class GlobalErrorHandler {

    private final static String DEFAULT_ERROR_VIEW = "error";//错误信息页

    @Autowired
    private ErrorInfoBuilder errorInfoBuilder;//错误信息的构建工具

    /**
     * 根据业务规则,统一处理异常。
     */
    @ExceptionHandler(Exception.class)
    @ResponseBody
    public Object exceptionHandler(HttpServletRequest request, Throwable error) {

        //1.若为AJAX请求,则返回异常信息(JSON)
        if (isAjaxRequest(request)) {
           return errorInfoBuilder.getErrorInfo(request,error);
        }
        //2.其余请求,则返回指定的异常信息页(View).
        return new ModelAndView(DEFAULT_ERROR_VIEW, "errorInfo", errorInfoBuilder.getErrorInfo(request, error));
    }

    private boolean isAjaxRequest(HttpServletRequest request) {

        return "XMLHttpRequest".equals(request.getHeader("X-Requested-With"));
    }

}

package com.hehe.error;

public class ErrorInfo {

    private String time;//发生时间
    private String url;//访问Url
    private String error;//错误类型
    String stackTrace;//错误的堆栈轨迹
    private int statusCode;//状态码
    private String reasonPhrase;//状态码

    //Getters And Setters
       ...

}

package com.hehe.error;

@Order(Ordered.HIGHEST_PRECEDENCE)
@Component
public class ErrorInfoBuilder implements HandlerExceptionResolver, Ordered {

    /**
     * 错误KEY
     */
    private final static String ERROR_NAME = "hehe.error";

    /**
     * 错误配置(ErrorConfiguration)
     */
    private ErrorProperties errorProperties;

    public ErrorProperties getErrorProperties() {
        return errorProperties;
    }

    public void setErrorProperties(ErrorProperties errorProperties) {
        this.errorProperties = errorProperties;
    }

    /**
     * 错误构造器 (Constructor) 传递配置属性：server.xx -> server.error.xx
     */
    public ErrorInfoBuilder(ServerProperties serverProperties) {
        this.errorProperties = serverProperties.getError();
    }

    /**
     * 构建错误信息.(ErrorInfo)
     */
    public ErrorInfo getErrorInfo(HttpServletRequest request) {

        return getErrorInfo(request, getError(request));
    }

    /**
     * 构建错误信息.(ErrorInfo)
     */
    public ErrorInfo getErrorInfo(HttpServletRequest request, Throwable error) {
        ErrorInfo errorInfo = new ErrorInfo();
        errorInfo.setTime(LocalDateTime.now().toString());
        errorInfo.setUrl(request.getRequestURL().toString());
        errorInfo.setError(error.toString());
        errorInfo.setStatusCode(getHttpStatus(request).value());
        errorInfo.setReasonPhrase(getHttpStatus(request).getReasonPhrase());
        errorInfo.setStackTrace(getStackTraceInfo(error, isIncludeStackTrace(request)));
        return errorInfo;
    }

    /**
     * 获取错误.(Error/Exception)
     *
     * @see DefaultErrorAttributes #addErrorDetails
     */
    public Throwable getError(HttpServletRequest request) {
        //根据HandlerExceptionResolver接口方法来获取错误.
        Throwable error = (Throwable) request.getAttribute(ERROR_NAME);
        //根据Request对象获取错误.
        if (error == null) {
            error = (Throwable) request.getAttribute(WebUtils.ERROR_EXCEPTION_ATTRIBUTE);
        }
        //当获取错误非空,取出RootCause.
        if (error != null) {
            while (error instanceof ServletException && error.getCause() != null) {
                error = error.getCause();
            }
        }//当获取错误为null,此时我们设置错误信息即可.
        else {
            String message = (String) request.getAttribute(WebUtils.ERROR_MESSAGE_ATTRIBUTE);
            if (StringUtils.isEmpty(message)) {
                HttpStatus status = getHttpStatus(request);
                message = "Unknown Exception But " + status.value() + " " + status.getReasonPhrase();
            }
            error = new Exception(message);
        }
        return error;
    }

    /**
     * 获取通信状态(HttpStatus)
     *
     * @see AbstractErrorController #getStatus
     */
    public HttpStatus getHttpStatus(HttpServletRequest request) {
        Integer statusCode = (Integer) request.getAttribute(WebUtils.ERROR_STATUS_CODE_ATTRIBUTE);
        try {
            return statusCode != null ? HttpStatus.valueOf(statusCode) : HttpStatus.INTERNAL_SERVER_ERROR;
        } catch (Exception ex) {
            return HttpStatus.INTERNAL_SERVER_ERROR;
        }
    }

    /**
     * 获取堆栈轨迹(StackTrace)
     *
     * @see DefaultErrorAttributes  #addStackTrace
     */
    public String getStackTraceInfo(Throwable error, boolean flag) {
        if (!flag) {
            return "omitted";
        }
        StringWriter stackTrace = new StringWriter();
        error.printStackTrace(new PrintWriter(stackTrace));
        stackTrace.flush();
        return stackTrace.toString();
    }

    /**
     * 判断是否包含堆栈轨迹.(isIncludeStackTrace)
     *
     * @see BasicErrorController #isIncludeStackTrace
     */
    public boolean isIncludeStackTrace(HttpServletRequest request) {

        //读取错误配置(server.error.include-stacktrace=NEVER)
        IncludeStacktrace includeStacktrace = errorProperties.getIncludeStacktrace();

        //情况1：若IncludeStacktrace为ALWAYS
        if (includeStacktrace == IncludeStacktrace.ALWAYS) {
            return true;
        }
        //情况2：若请求参数含有trace
        if (includeStacktrace == IncludeStacktrace.ON_TRACE_PARAM) {
            String parameter = request.getParameter("trace");
            return parameter != null && !"false".equals(parameter.toLowerCase());
        }
        //情况3：其它情况
        return false;
    }

    /**
     * 保存错误/异常.
     *
     * @see DispatcherServlet #processHandlerException 进行选举HandlerExceptionResolver
     */
    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, @Nullable Object handler, Exception ex) {
        request.setAttribute(ERROR_NAME, ex);
        return null;
    }

    /**
     * 提供优先级 或用于排序
     */
    @Override
    public int getOrder() {
        return Ordered.HIGHEST_PRECEDENCE;
    }
}

package com.hehe;

@SpringBootApplication
@RestController
public class ErrorHandlerApplication {
    /**
     * 随机抛出异常
     */
    private void randomException() throws Exception {
        Exception[] exceptions = { //异常集合
                new NullPointerException(),
                new ArrayIndexOutOfBoundsException(),
                new NumberFormatException(),
                new SQLException()};
        //发生概率
        double probability = 0.75;
        if (Math.random() < probability) {
            //情况1：要么抛出异常
            throw exceptions[(int) (Math.random() * exceptions.length)];
        } else {
            //情况2：要么继续运行
        }

    }

    /**
     * 模拟用户数据访问
     */
    @GetMapping("/")
    public List index() throws Exception {
        randomException();
        return Arrays.asList("正常用户数据1!", "正常用户数据2! 请按F5刷新!!");
    }

    public static void main(String[] args) {
        SpringApplication.run(ErrorHandlerApplication.class, args);
    }
}

package com.hehe.error;

@Controller
@RequestMapping("${server.error.path:/error}")
public class GlobalErrorController implements ErrorController {

@Autowired
    private ErrorInfoBuilder errorInfoBuilder;//错误信息的构建工具.

    private final static String DEFAULT_ERROR_VIEW = "error";//错误信息页

    /**
     * 情况1：若预期返回类型为text/html,则返回错误信息页(View).
     */
    @RequestMapping(produces = MediaType.TEXT_HTML_VALUE)
    public ModelAndView errorHtml(HttpServletRequest request) {
        return new ModelAndView(DEFAULT_ERROR_VIEW, "errorInfo", errorInfoBuilder.getErrorInfo(request));
    }

    /**
     * 情况2：其它预期类型 则返回详细的错误信息(JSON).
     */
    @RequestMapping
    @ResponseBody
    public ErrorInfo error(HttpServletRequest request) {
        return errorInfoBuilder.getErrorInfo(request);
    }

    @Override
    public String getErrorPath() {//获取映射路径
        return errorInfoBuilder.getErrorProperties().getPath();
    }
}