com.feingto.cloud.config.web.ExceptionResolverUtil Maven / Gradle / Ivy

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package com.feingto.cloud.config.web;

import com.feingto.cloud.kit.HttpKit;
import org.springframework.http.HttpStatus;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.json.MappingJackson2JsonView;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;

/**
 * 异常解析工具
 *
 * @author longfei
 */
public class ExceptionResolverUtil {
    public static final String LINE_SEPARATOR = "
";

    public static ModelAndView handleException(HttpServletRequest request, int status, String error) {
        if (HttpKit.isAjaxWithRequest(request)) {
            return renderJsonView(status, error);
        }

        Map map = new HashMap<>();
        map.put("code", status);
        map.put("error", error);
        return new ModelAndView("error/500", map, HttpStatus.valueOf(status));
    }

    public static ModelAndView renderJsonView(int status, String message) {
        ModelAndView mv = new ModelAndView(new MappingJackson2JsonView())
                .addObject("success", false)
                .addObject("code", status)
                .addObject("message", message);
        return Optional.ofNullable(HttpStatus.resolve(status))
                .map(httpStatus -> {
                    mv.setStatus(httpStatus);
                    mv.addObject("error", httpStatus.getReasonPhrase());
                    return mv;
                })
                .orElseGet(() -> {
                    String code = String.valueOf(status);
                    HttpStatus s = HttpStatus.valueOf(code.length() > 3 ?
                            Integer.parseInt(code.substring(0, 3)) : status);
                    mv.setStatus(s);
                    mv.addObject("error", s.getReasonPhrase());
                    return mv;
                });
    }

    public static String trace(Throwable t) {
        return t.getCause() == null ? t.getMessage() : trace(t.getCause());
    }

    public static String resolverException(Exception ex, String message) {
        return StringUtils.hasText(ex.getMessage()) ? trace(ex) : message;
    }

    public static String resolverBindException(BindingResult result) {
        List errorList = result.getFieldErrors();
        StringBuilder sb = new StringBuilder();
        for (FieldError fieldError : errorList) {
            sb.append("[")
                    .append(fieldError.getField())
                    .append("]验证失败: ")
                    .append(fieldError.getDefaultMessage())
                    .append(LINE_SEPARATOR);
        }
        sb.deleteCharAt(sb.length() - LINE_SEPARATOR.length());
        return sb.toString();
    }
}