この記事の内容 サイクル こんにちは！キーボードのほこりを取り除きましょう。スプリングブート プロジェクトを作成します。Maven の依存関係から以下が必要になります。
![Spring Boot コントローラーでの例外処理 - 1]()
BusinessException および CustomException を作成します。
![Java-университет]()
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<java.version>1.8</java.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.0.RELEASE</version>
<relativePath/><!-- lookup parent from repository -->
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
BusinessException および CustomException を作成します。
public class BusinessException extends Exception{
public BusinessException(String message) {
super(message);
}
}
public class CustomException extends Exception{
public CustomException(String message) {
super(message);
}
}
public class Response {
private String message;
public Response() {
}
public Response(String message) {
this.message = message;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
private String debugMessage;
public Response(String message, String debugMessage) {
this.message = message;
this.debugMessage = debugMessage;
}
@RestController
public class Example7Controller {
@GetMapping(value = "/testExtendsControllerAdvice")
public ResponseEntity<?> testExtendsControllerAdvice(@RequestBody Response response) {
return ResponseEntity.ok(response);
}
}
{
"message": "message"
}
{
"message": "message",
"debugMessage": null
}
{
11"message": "message"
}
@ControllerAdvice
public class DefaultAdvice extends ResponseEntityExceptionHandler {//унаследовались от обработчика-заготовки
@ExceptionHandler(BusinessException.class)
public ResponseEntity<Response> handleException(BusinessException e) {
Response response = new Response(e.getMessage());
return new ResponseEntity<>(response, HttpStatus.OK);
}
//Небольшое отступление: В обработчике выше, обратите внимание на HttpStatus.OK,
//он может быть и HttpStatus.BAD_REQUEST or другим, тут ограничений нет,
//попробуйте поменять статусы и потестить этот обработчик
@Override//переопределor метод родительского класса
protected ResponseEntity<Object> handleHttpMessageNotReadable
(HttpMessageNotReadableException ex, HttpHeaders headers, HttpStatus status, WebRequest request) {
Response response = new Response("Не правильный JSON",ex.getMessage());
return new ResponseEntity<>(response, status);
}
}
{
11"message": "message"
}
{
"message": "Не правильный JSON",
"debugMessage": "JSON parse error: Unexpected character ('1' (code 49)): was expecting double-quote to start field name; nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected character ('1' (code 49)): was expecting double-quote to start field name\n at [Source: (PushbackInputStream); line: 2, column: 6]"
}
{
"message": "message"
}
{
"message": "message",
"debugMessage": null
}
@JsonInclude(JsonInclude.Include.NON_NULL)
private String debugMessage;
{
"message": "message"
}
{
"name": "Katy Perry"
“status”: “super star”
}
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