예외 처리
ExceptionController.java
package com.fastcampus.app;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class ExceptionController {
@RequestMapping("/ex")
public String main() throws Exception{
try {
throw new Exception("예외가 발생했습니다.");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
@RequestMapping("/ex2")
public String main2() throws Exception{
try {
throw new Exception("예외가 발생했습니다.");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "error";
}
}
}
error.jsp
<%@ page contentType="text/html;charset=utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<title>error.jsp</title>
</head>
<body>
<h1>예외가 발생했습니다.</h1>
발생한 예외 : ${ex}<br>
예외 메시지 : ${ex.message}<br>
<ol>
<c:forEach items="${ex.stackTrace}" var="i">
<li>${i.toString()}</li>
</c:forEach>
</ol>
</body>
</html>
ExceptionHandler 추가
package com.fastcampus.app;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class ExceptionController {
@ExceptionHandler(Exception.class)
public String catcher(Exception ex) {
return "error";
}
@RequestMapping("/ex")
public String main() throws Exception{
throw new Exception("예외가 발생했습니다.");
}
@RequestMapping("/ex2")
public String main2() throws Exception{
throw new Exception("예외가 발생했습니다.");
}
}
@ControllerAdvice
ExceptionHandler 는 같은 클래스 안에서만 동작한다
이를 해결하기 위해
@ControllerAdvice 를 사용해서 코드를 분리한다
@ControllerAdvice("com.jcy.ch2") : 설정한 패키지 안에서만 적용
@ContorllerAdvice : 모든 패키지에 적용
GlobalCatcher.java
package com.fastcampus.app;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
@ControllerAdvice
public class GlobalCatcher {
@ExceptionHandler(Exception.class)
public String catcher(Exception ex, Model m) {
m.addAttribute("ex", ex);
return "error";
}
}
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