在Spring MVC中使用@ControllerAdvice创建全局异常处理器的方法

import lombok.Data;
import java.io.Serializable;
/**
 * 后端统一返回结果
 * @param <T>
 */
@Data
public class Result<T> implements Serializable {
    private Integer code; //编码：1成功，0和其它数字为失败
    private String msg; //错误信息
    private T data; //数据
    public static <T> Result<T> success() {
        Result<T> result = new Result<T>();
        result.code = 1;
        return result;
    }
    public static <T> Result<T> success(T object) {
        Result<T> result = new Result<T>();
        result.data = object;
        result.code = 1;
        return result;
    }
    public static <T> Result<T> error(String msg) {
        Result result = new Result();
        result.msg = msg;
        result.code = 0;
        return result;
    }
}

/**
 * 业务异常
 */
public class BaseException extends RuntimeException {
    public BaseException() {
    }
    public BaseException(String msg) {
        super(msg);
    }
}

public class UserNotLoginException extends BaseException {
    public UserNotLoginException() {
    }
    public UserNotLoginException(String msg) {
        super(msg);
    }
}

import com.example.result.Result;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
@RestControllerAdvice
public class GlobalExceptionHandler {
    /**
     * 捕获业务异常
     */
    @ExceptionHandler
    public Result<?> exceptionHandler(BaseException ex){
        return Result.error(ex.getMessage());
    }
	/**
     * 捕获除数为0异常
     */
    @ExceptionHandler
    public Result<?> exceptionHandler(ArithmeticException ex){
        return Result.error("分母不能为0");
    }
    /**
     * 根据异常类型和业务需求，以以下格式继续完善代码
     */
}

 @ExceptionHandler
    public Result<?> exceptionHandler(异常类型 ex){
        return Result.error("异常类型信息");
    }

import com.example.result.Result;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class webTest {
	/**
     * 测试捕获业务异常
     */
    @GetMapping("/aa/{id}")
    public Result<?> aa(@PathVariable Long id){
        if(id<2)
            throw new UserNotLoginException("密码错误");
        return Result.success("成功");
    }
    /**
     * 测试捕获除数为0异常
     */
    @GetMapping("/bb")
    public Result<?> bb(){
        int a = 1/0;
        return Result.success("成功");
    }