springboot简单的异常处理例子-Toy模板网

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1. ExceptionHandler仅仅处理当前controller的Exception

@RestController

@RequestMapping("/ex")

public class ExController {

@GetMapping("thex")

public String throwEx() throws Exception {

throw new Exception("exception thrown from ExController.throwEx");

}

@GetMapping("fnfex")

public String FileNotFound() throws Exception {

throw new FileNotFoundException("FileNotFoundException thrown from ExController.throwEx");

}

@ExceptionHandler(FileNotFoundException.class)

public String exHandler(Exception e) {

System.out

.println("==================ExController.exHandler===================================================");

e.printStackTrace();

return e.getMessage() + " from ExController.exHandler";

}

2.@ControllerAdvice

用以定义全局异常处理，当controller自己的@ExceptionHandler无法处理时，就交给全局的@ControllerAdvice 中定义的@ExceptionHandler，

@ExceptionHandler methods in @ControllerAdvice can be used to handle exceptions from any @Controller or any other handler.

@ControllerAdvice(annotations = { Controller.class, RestController.class })

public class AdController {

@ResponseBody

@ExceptionHandler(Exception.class)

public Map errorHandler(Exception ex) {

Map errorMap = new HashMap();

errorMap.put("msg", ex.getMessage()+" from AdController");

System.out.println("---------------in AdController.errorHandler ");

return errorMap;

}

@ExceptionHandler(IOException.class)

public Map errorHandler2(IOException ex,, HttpServletRequest request) {

.....

}

@ExceptionHandler(FileNotFoundException.class)

public Map errorHandler3(FileNotFoundException ex) {

.....

}

3.BasicErrorController

BasicErrorController用来处理前两个处理不了的Exception

@Slf4j

@RestController

public class ExAdController extends BasicErrorController {

public ExAdController(ErrorProperties ep) {

super(new DefaultErrorAttributes(),ep);

}

@Override

@RequestMapping(value = "", produces = {MediaType.APPLICATION_JSON_VALUE})

public ResponseEntity<Map<String, Object>> error(HttpServletRequest request) {

// 获取错误信息

Map<String, Object> body = getErrorAttributes(request, getErrorAttributeOptions(request, MediaType.ALL));

HttpStatus status = getStatus(request);

String code = body.get("status").toString();

String message = body.get("message").toString();

String trace="";

if(this.getErrorProperties().getIncludeStacktrace()==IncludeAttribute.ALWAYS) {

Object sb=body.get("trace");

trace=sb.toString();

}

return new ResponseEntity(message+" dealt by ExAdController \r\n "+trace , HttpStatus.OK);

}

在1中处理不了的Exception会在BasicErrorController 进行处理

-----------------------------------------------------------------------------------------------------------------------------------------------

@ControllerAdvice("org.example.controllers")
@ControllerAdvice(assignableTypes = {ControllerInterface.class, AbstractController.class})
@ControllerAdvice(annotations = RestController.class)文章来源地址https://www.toymoban.com/news/detail-434760.html

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