SpringBoot中的统一异常处理示例代码

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import springbook.model.Result;
@Slf4j
@ResponseBody
@ControllerAdvice
public class ExceptionAdvice {
    @ExceptionHandler
    public Result handlerException(Exception e){
        log.error("发生异常, e: {}", e);
        return Result.fail("内部错误");
    }
    @ExceptionHandler
    public Result handlerException(NullPointerException e){
        log.error("发生异常, e:", e);
        return Result.fail("发生空指针异常");
    }
    @ExceptionHandler
    public Result handlerException(ArithmeticException e){
        log.error("发生异常, e:", e);
        return Result.fail("发生算术异常");
    }
}

import lombok.Data;
import springbook.enums.ResultStatus;
@Data
public class Result<T> {
    private ResultStatus code; 
    private String errMsg; //错误信息, 如果业务成功, errMsg为空
    private T data;
    public static <T> Result success(T data){
        Result result = new Result<>();
        result.setCode(ResultStatus.SUCCESS);
        result.setData(data);
        return result;
    }
    public static Result fail(String msg){
        Result result = new Result<>();
        result.setCode(ResultStatus.FAIl);
        result.setErrMsg(msg);
        return result;
    }
    public static Result fail(ResultStatus resultStatus, String msg){
        Result result = new Result<>();
        result.setCode(resultStatus);
        result.setErrMsg(msg);
        return result;
    }
}

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RequestMapping("/test")
@RestController
public class TestController {
    @RequestMapping("/t1")
    public String t1(){
        int result = 10/0;
        return "string";
    }
    @RequestMapping("/t2")
    public Integer t2(){
        String str = null;
        System.out.println(str.length());
        return 1;
    }
    @RequestMapping("/t3")
    public Boolean t3(){
        Integer[] integers = new Integer[]{1,2,3,4};
        System.out.println(integers[5]);
        return true;
    }
}