SpringBoot全局异常处理

lz在这里只列举了一些常见的异常，上代码

1、全局配置类

import com.alibaba.fastjson.JSON;
import com.future.common.pojo.Result.ResponseMessage;
import com.future.common.pojo.Result.ResultCode;
import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConversionException;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.context.request.RequestContextListener;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.NoHandlerFoundException;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@Configuration
public class WebMvcConfigurer extends WebMvcConfigurerAdapter {


    //统一异常处理
    @Override
    public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
        exceptionResolvers.add(new HandlerExceptionResolver() {
            public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception e) {
                ResponseMessage result = null;
                boolean resultSuccess = false;
                if (e instanceof NoHandlerFoundException) {
                    result = new ResponseMessage(ResultCode.NOT_FOUND.getCode(), ResultCode.NOT_FOUND.getMessage(), resultSuccess);
                } else if (e instanceof MethodArgumentNotValidException) {
                    result = new ResponseMessage(ResultCode.PARAM_MISS.getCode(), ResultCode.PARAM_MISS.getMessage(), resultSuccess);
                } else if (e instanceof HttpMessageConversionException) {
                    result = new ResponseMessage(ResultCode.PARAM_TYPE_ERROR.getCode(), ResultCode.PARAM_TYPE_ERROR.getMessage(), resultSuccess);
                } else if (e instanceof HttpMessageNotReadableException) {
                    result = new ResponseMessage(ResultCode.PARAM_MISS.getCode(), ResultCode.PARAM_MISS.getMessage(), resultSuccess);
                } else if (e instanceof HttpRequestMethodNotSupportedException) {
                    result = new ResponseMessage(ResultCode.METHOD_NOT_SUPPORTED.getCode(), ResultCode.METHOD_NOT_SUPPORTED.getMessage(), resultSuccess);
                } else {
                    result = new ResponseMessage(ResultCode.INTERNAL_SERVER_ERROR.getCode(), ResultCode.INTERNAL_SERVER_ERROR.getMessage(), resultSuccess);
                }
                responseResult(response, result);
                return new ModelAndView();
            }
        });
    }

    private void responseResult(HttpServletResponse response, ResponseMessage result) {
        response.setCharacterEncoding("UTF-8");
        response.setHeader("Content-type", "application/json;charset=UTF-8");
        response.setStatus(200);
        try {
            response.getWriter().write(JSON.toJSONString(result));
        } catch (IOException ex) {
        }
    }

    /**
     * RequestContextListener注册
     */
    @Bean
    public ServletListenerRegistrationBean<RequestContextListener> requestContextListenerRegistration() {
        return new ServletListenerRegistrationBean<>(new RequestContextListener());
    }

    /**
     * 将swagger-ui.html 添加 到 resources目录下
     *
     * @param registry
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
        registry.addResourceHandler("/web_frontend/**").addResourceLocations("classpath:/web_frontend/");

    }

}

2、yml配置
由于全局异常捕捉无法捕捉404异常，所以还需要在yml配置文件中加入几行代码

spring:
  mvc:
    throw-exception-if-no-handler-found: true
  resources:
    add-mappings: false