springboot 全局异常处理配置

摘要：一使用实现全局异常处理注解定义全局异常处理类指定自定义错误处理方法拦截的异常类型同一个异常被小范围的异常类和大范围的异常处理器同时覆盖，会选择小范围的异常处理器定义异常业务类异常年月日定义自定义异常无数据系统异常年月日定义全局异常处理类异常

一、springboot Restful使用@ControllerAdvice、@ExceptionHandler、@ResponseBody实现全局异常处理
@ControllerAdvice 注解定义全局异常处理类
@ExceptionHandler 指定自定义错误处理方法拦截的异常类型
同一个异常被小范围的异常类和大范围的异常处理器同时覆盖，会选择小范围的异常处理器

1.定义异常业务类

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/**
 * 异常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.定义自定义异常

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package exception;
/**
 * 无数据Exception
 *
 * @date 17/4/25
 * @since 1.0.0
 */
public class NotFoundException extends SystemException {
    public NotFoundException(String message) {
        super(message);
    }
}
/**
 * 系统异常
 * 
 * @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.定义全局异常处理类

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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异常处理器
 * 
 * @date 2017年2月16日
 * @since 1.0.0
 */
@ControllerAdvice("web") //指定异常处理期拦截范围
public class WebExceptionHandler {
    static Logger LOG = LoggerFactory.getLogger(WebExceptionHandler.class);
    @Autowired
    private MessageSource messageSource;
    @ExceptionHandler(FieldException.class)
    @ResponseStatus(HttpStatus.CONFLICT) //指定http响应状态
    @ResponseBody
    /**
     * 未找到数据
     *
     * @param e
     * @return
     */
    @ExceptionHandler(NotFoundException.class)//指定异常类型
    @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);
    }
    /**
     * 填充异常响应消息
     * 
     * @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

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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：

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@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;
      }
}