springboot对springmvc的全局异常处理

1.application.properties配置中加入：

## global exception ##
#出现错误时, 直接抛出异常
spring.mvc.throw-exception-if-no-handler-found=true
#不要为我们工程中的资源文件建立映射
spring.resources.add-mappings=false

2.创建全局异常处理类：

import com.my.iot.app.entity.dto.HttpResponse;
import com.my.iot.app.enums.CodeEnum;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.method.annotation.MethodArgumentTypeMismatchException;
import org.springframework.web.servlet.NoHandlerFoundException;


@RestControllerAdvice
public class GlobalControllerExceptionHandler {

    /**
     * 前端参数错误   400
     *
     * @param exception
     * @return
     */
    @ExceptionHandler(value = {MethodArgumentTypeMismatchException.class})
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public HttpResponse methodArgumentTypeMismatchException(MethodArgumentTypeMismatchException exception) {
        exception.printStackTrace();
        return new HttpResponse(CodeEnum.TYPEERROR.getKey(), CodeEnum.TYPEERROR.getValue(), null);
    }

    /**
     * 请求路径错误   404
     *
     * @param exception
     * @return
     */
    @ExceptionHandler(value = {NoHandlerFoundException.class})
    @ResponseStatus(HttpStatus.NOT_FOUND)
    public HttpResponse noHandlerFoundException(NoHandlerFoundException exception) {
        exception.printStackTrace();
        return new HttpResponse(CodeEnum.NOMAPPING.getKey(), CodeEnum.NOMAPPING.getValue(), null);
    }

    /**
     * 运行时异常    500
     *
     * @param re
     * @return
     */
    @ExceptionHandler(value = {RuntimeException.class})
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public HttpResponse runtimeException(RuntimeException re) {
        re.printStackTrace();
        return new HttpResponse(CodeEnum.ERROR.getKey(), CodeEnum.ERROR.getValue(), null);
    }

}

其中HttpResponse：

import java.io.Serializable;


public class HttpResponse implements Serializable {

    private Integer code;//响应码 
    private String message;//响应说明
    private Object data;//响应数据

    public HttpResponse() {
    }

    public HttpResponse(Integer code, String message, Object data) {
        this.code = code;
        this.message = message;
        this.data = data;
    }

    @Override
    public String toString() {
        return "HttpResponse{" +
                "code=" + code +
                ", message='" + message + '\'' +
                ", data=" + data +
                '}';
    }

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }
}