Spring 对Controller异常的统一处理

对于Controller的异常处理，分为两种，一种是对已知的异常处理，一种是未知的异常处理

1、定义自定义异常类

/**
 * @author hzc
 *
 */
public class UserNotExitException extends RuntimeException {

    /**
     * 
     */
    private static final long serialVersionUID = -6271509017751433865L;

    private String id;
    
    public UserNotExitException(String id) {
        super("user not exit");
        this.setId(id);
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }
    
}

2、使用@ControllerAdvice

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;
import com.maple.exception.UserNotExitException;

@ControllerAdvice
public class ControllerExceptionHandle { 
    @ExceptionHandler(UserNotExitException.class)
    @ResponseBody
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public Map<String, Object> handleUserNotExistException(UserNotExitException ex){
        Map<String, Object> result = new HashMap<>();
        result.put("id", ex.getId());
        result.put("message", ex.getMessage());     
        return result;
    }
}