摘要：一使用實現全局異常處理注解定義全局異常處理類指定自定義錯誤處理方法攔截的異常類型同一個異常被小范圍的異常類和大范圍的異常處理器同時覆蓋，會選擇小范圍的異常處理器定義異常業務類異常年月日定義自定義異常無數據系統異常年月日定義全局異常處理類異常

一、springboot Restful使用@ControllerAdvice、@ExceptionHandler、@ResponseBody實現全局異常處理
@ControllerAdvice 注解定義全局異常處理類
@ExceptionHandler 指定自定義錯誤處理方法攔截的異常類型
同一個異常被小范圍的異常類和大范圍的異常處理器同時覆蓋，會選擇小范圍的異常處理器

1.定義異常業務類

/**
 * 異常VO
 * 
 * @date 2017年2月17日
 * @since 1.0.0
 */
public class ExceptionVO {

    private String errorCode;
    private String message;

    public String getMessage() {
        return message;
    }

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

    public String getErrorCode() {
        return errorCode;
    }

    public void setErrorCode(String errorCode) {
        this.errorCode = errorCode;
    }
}

2.定義自定義異常

package exception;

/**
 * 無數據Exception
 *
 * @date 17/4/25
 * @since 1.0.0
 */
public class NotFoundException extends SystemException {

    public NotFoundException(String message) {
        super(message);
    }
}


/**
 * 系統異常
 * 
 * @date 2017年2月12日
 * @since 1.0.0
 */
public class SystemException extends RuntimeException {

    private static final long serialVersionUID = 1095242212086237834L;

    protected Object errorCode;
    protected Object[] args;

    public SystemException() {
        super();
    }

    public SystemException(String message, Throwable cause) {
        super(message, cause);
    }

    public SystemException(String message) {
        super(message);
    }

    public SystemException(String message, Object[] args, Throwable cause) {
        super(message, cause);
        this.args = args;
    }

    public SystemException(String message, Object[] args) {
        super(message);
        this.args = args;
    }

    public SystemException(Object errorCode, String message, Throwable cause) {
        super(message, cause);
        this.errorCode = errorCode;
    }

    public SystemException(Object errorCode, String message) {
        super(message);
        this.errorCode = errorCode;
    }

    public SystemException(Object errorCode, String message, Object[] args, Throwable cause) {
        super(message, cause);
        this.args = args;
        this.errorCode = errorCode;
    }

    public SystemException(Object errorCode, String message, Object[] args) {
        super(message);
        this.args = args;
        this.errorCode = errorCode;
    }

    public SystemException(Throwable cause) {
        super(cause);
    }

    public Object[] getArgs() {
        return args;
    }

    public Object getErrorCode() {
        return errorCode;
    }
}

3.定義全局異常處理類

import java.util.HashMap;
import java.util.Map;
import java.util.stream.Collectors;

import NotFoundException;
import org.apache.commons.collections.CollectionUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.MessageSource;
import org.springframework.context.NoSuchMessageException;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.http.HttpStatus;
import org.springframework.validation.BindException;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;
import ExceptionVO;


/**
 * WEB異常處理器
 * 
 * @date 2017年2月16日
 * @since 1.0.0
 */
@ControllerAdvice("web") //指定異常處理期攔截范圍
public class WebExceptionHandler {

    static Logger LOG = LoggerFactory.getLogger(WebExceptionHandler.class);

    @Autowired
    private MessageSource messageSource;

    @ExceptionHandler(FieldException.class)
    @ResponseStatus(HttpStatus.CONFLICT) //指定http響應狀態
    @ResponseBody

    /**
     * 未找到數據
     *
     * @param e
     * @return
     */
    @ExceptionHandler(NotFoundException.class)//指定異常類型
    @ResponseStatus(HttpStatus.NOT_FOUND)
    @ResponseBody
    public ExceptionVO handleNotFoundException(NotFoundException e) {
        ExceptionVO vo = new ExceptionVO();
        fillExceptionVO(e, vo);
        return vo;
    }


    @ExceptionHandler(SystemException.class)
    @ResponseStatus(HttpStatus.CONFLICT)
    @ResponseBody
    public ExceptionVO handleSystemException(SystemException e) {
        ExceptionVO vo = new ExceptionVO();
        fillExceptionVO(e, vo);
        return vo;
    }

    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    @ExceptionHandler(Exception.class)
    public void globalError(Exception e) {
        LOG.error(e.getMessage(), e);
    }

    /**
     * 填充異常響應消息
     * 
     * @param e
     * @param vo
     */
    private void fillExceptionVO(SystemException e, ExceptionVO vo) {
        if (e.getMessage() != null) {
            String message = e.getMessage();
            try {
                message = messageSource.getMessage(e.getMessage(), e.getArgs(), LocaleContextHolder.getLocale());
            } catch (NoSuchMessageException ex) {
                ; // ignore
            }
            vo.setMessage(message);
        }
        vo.setErrorCode(String.valueOf(e.getErrorCode()));
    }
}

二、springboot 返回 ModelAndView

package exception.handler;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
@Commpent
public class OverallExceptionHandler implements HandlerExceptionResolver {

    @Override
    public ModelAndView resolveException(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2,
            Exception ex) {
        ModelAndView mav = new ModelAndView();
        System.out.println(ex.getMessage());
        mav.addObject("errMsg", ex.getMessage());
        mav.setViewName("error");
        return mav;
    }

}

其它方式：

@ControllerAdvice
public class GlobalExceptionHandler {

      @ExceptionHandler(value = Exception.class)
      public ModelAndView resolveException(HttpServletRequest request, Exception ex) throws Exception {
        ModelAndView mav = new ModelAndView();
        System.out.println(ex.getMessage());
        mav.addObject("errMsg", ex.getMessage());
        mav.setViewName("error");
        return mav;
      }
}