代码

需要配置统一返回对象使用

import com.fan.model.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.util.Map;
import java.util.Objects;

/**
 * 全局异常拦截
 */
@Slf4j
@RestControllerAdvice(basePackages = "com.fan.controller")
public class ExceptionForGlobal {

    /**
     * JSR303校验异常拦截
     */
    @ExceptionHandler(value = {MethodArgumentNotValidException.class, BindException.class})
    public Result<Map<String, String>> handleValidationException(Exception e) {
        BindingResult bindingResult = null;
        if (e instanceof MethodArgumentNotValidException) {
            bindingResult = ((MethodArgumentNotValidException) e).getBindingResult();
        } else if (e instanceof BindException) {
            bindingResult = ((BindException) e).getBindingResult();
        }
        // 获取第一个错误参数
        String msg = "请求参数错误";
        if (Objects.nonNull(bindingResult)) {
            for (FieldError fieldError : bindingResult.getFieldErrors()) {
                msg = fieldError.getDefaultMessage();
                break;
            }
        }
        return Result.failMsg(msg);
    }

    /**
     * 断言异常信息拦截
     */
    @ExceptionHandler(value = {IllegalArgumentException.class})
    public Result<Map<String, String>> dealIllegalArgumentException(Exception e) {
        return Result.failMsg(e.getMessage());
    }

    /**
     * 异常拦截
     */
    @ExceptionHandler(value = {Exception.class})
    public Result<Map<String, String>> dealException(Exception e) {
        e.printStackTrace();
        return Result.error("服务异常");
    }

}

常见异常处理

import com.fan.model.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.util.Map;
import java.util.Objects;

/**
 * 全局异常拦截
 */
@Slf4j
@RestControllerAdvice(basePackages = "com.fan.controller")
public class ExceptionForGlobal {

    /**
     * JSR303校验异常拦截
     */
    @ExceptionHandler(value = {MethodArgumentNotValidException.class, BindException.class})
    public Result<Map<String, String>> handleValidationException(Exception e) {
        BindingResult bindingResult = null;
        if (e instanceof MethodArgumentNotValidException) {
            bindingResult = ((MethodArgumentNotValidException) e).getBindingResult();
        } else if (e instanceof BindException) {
            bindingResult = ((BindException) e).getBindingResult();
        }
        // 获取第一个错误参数
        String msg = "请求参数错误";
        if (Objects.nonNull(bindingResult)) {
            for (FieldError fieldError : bindingResult.getFieldErrors()) {
                msg = fieldError.getDefaultMessage();
                break;
            }
        }
        return Result.failMsg(msg);
    }

    /**
     * 断言异常信息拦截
     */
    @ExceptionHandler(value = {IllegalArgumentException.class})
    public Result<Map<String, String>> dealIllegalArgumentException(Exception e) {
        return Result.failMsg(e.getMessage());
    }

    /**
     * 参数不合法异常
     */
    @ExceptionHandler(value = {HttpMessageNotReadableException.class})
    public Result<Map<String, String>> dealHttpMessageNotReadableException(Exception e) {
        return Result.failMsg("参数不合法");
    }

    /**
     * 异常拦截
     */
    @ExceptionHandler(value = {Exception.class})
    public Result<Map<String, String>> dealException(Exception e) {
        e.printStackTrace();
        return Result.error("服务异常");
    }

}