SpringBoot错误处理机制以及自定义异常处理详解

 @GetMapping("/user/{id:\\d+}")
 public User get(@PathVariable String id) {
  throw new RuntimeException();
 }

@Controller
@RequestMapping("${server.error.path:${error.path:/error}}")
public class BasicErrorController extends AbstractErrorController {

 private final ErrorProperties errorProperties;

 /**
  * Create a new {@link BasicErrorController} instance.
  * @param errorAttributes the error attributes
  * @param errorProperties configuration properties
  */
 public BasicErrorController(ErrorAttributes errorAttributes,
   ErrorProperties errorProperties) {
  this(errorAttributes, errorProperties,
    Collections.emptyList());
 }

 /**
  * Create a new {@link BasicErrorController} instance.
  * @param errorAttributes the error attributes
  * @param errorProperties configuration properties
  * @param errorViewResolvers error view resolvers
  */
 public BasicErrorController(ErrorAttributes errorAttributes,
   ErrorProperties errorProperties, List errorViewResolvers) {
  super(errorAttributes, errorViewResolvers);
  Assert.notNull(errorProperties, "ErrorProperties must not be null");
  this.errorProperties = errorProperties;
 }

 @Override
 public String getErrorPath() {
  return this.errorProperties.getPath();
 }

 @RequestMapping(produces = "text/html")
 public ModelAndView errorHtml(HttpServletRequest request,
   HttpServletResponse response) {
  HttpStatus status = getStatus(request);
  Map model = Collections.unmodifiableMap(getErrorAttributes(
    request, isIncludeStackTrace(request, MediaType.TEXT_HTML)));
  response.setStatus(status.value());
  ModelAndView modelAndView = resolveErrorView(request, response, status, model);
  return (modelAndView == null &＃63; new ModelAndView("error", model) : modelAndView);
 }

 @RequestMapping
 @ResponseBody
 public ResponseEntity> error(HttpServletRequest request) {
  Map body = getErrorAttributes(request,
    isIncludeStackTrace(request, MediaType.ALL));
  HttpStatus status = getStatus(request);
  return new ResponseEntity>(body, status);
 }

 亲，您所访问的页面不存在

 服务器内部错误

package cn.shinelon.exception;

/**
 * @author Shinelon
 *
 */
public class UserNotExistException extends RuntimeException{

 /**
  * 
  */
 private static final long serialVersiOnUID= 1L;
 private String id;
 public UserNotExistException(String id) {
  super("user not exist");
  this.id=id;
 }
public void setId(String id) {
 this.id = id;
}
public String getId() {
 return id;
}
}

/**
 * 
 */
package cn.shinelon.exception;

import java.util.HashMap;
import java.util.Map;

import org.springframework.http.HttpStatus;
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;

/**
 * 控制器的异常处理类
 * @author Shinelon
 *
 */
//这个注解是指这个类是处理其他controller抛出的异常
@ControllerAdvice
public class ControllerExceptionHandler {

 //这个注解是指当controller中抛出这个指定的异常类的时候，都会转到这个方法中来处理异常
 @ExceptionHandler(UserNotExistException.class)
 //将返回的值转成json格式的数据
 @ResponseBody
 //返回的状态码
 @ResponseStatus(value=HttpStatus.INTERNAL_SERVER_ERROR)  //服务内部错误
 public Map handlerUserNotExistException(UserNotExistException ex){
  Map result=new HashMap();
  result.put("id", ex.getId());
  result.put("message", ex.getMessage());
  return result;
 }
}

@GetMapping("/user/{id:\\d+}")
 //@RequestMapping(value="/user/{id:\\d+}",method=RequestMethod.GET)
 @JsonView(User.DetailJsonView.class)
 public User get(@PathVariable String id) {
  throw new UserNotExistException(id);
 }