项目中必不可少的全局异常处理

import lombok.Data;

@Data
public class Result {
    private static final String SUCCESS = "1";
    private static final String ERROR = "-1";

    /**
     * 成功返回 1
     * 失败返回 -1
     */
    private String code;
    private String msg;
    private Object data;

    public static Result success(){
        Result result = new Result();
        result.setCode(SUCCESS);
        return result;
    }

    public static Result success(Object data){
        Result result = new Result();
        result.setCode(SUCCESS);
        result.setData(data);
        return result;
    }
    public static Result error(String msg){
        Result result = new Result();
        result.setCode(ERROR);
        result.setMsg(msg);
        return result;
    }
}

先创建一个 exception 包 直接复制这两个类。 

public class CustomException extends RuntimeException {
    private String msg;

    public CustomException(String msg) {
        this.msg = msg;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }
}

import com.xxxx.common.Result;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;

@ControllerAdvice(basePackages="com.xxxx.controller")
public class GlobalExceptionHandler {

    private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    //统一异常处理@ExceptionHandler,主要用于Exception
    @ExceptionHandler(Exception.class)
    @ResponseBody
    public Result error(HttpServletRequest request, Exception e){
        log.error("异常信息：",e);
        return Result.error("系统异常");
    }

    @ExceptionHandler(CustomException.class)
    @ResponseBody
    public Result customError(HttpServletRequest request, CustomException e){
        return Result.error(e.getMsg());
    }
}

 

使用用例：throw new CustomException("该用户已存在！");

public void add(CrmPartyUser crmPartyUser){
    //判断用户名是否为空
    if (crmPartyUser.getLoginName() == null || !"".equals(crmPartyUser.getLoginName()){
        throw new CustomException("用户名不能为空");
    }
    CrmPartyUser user = crmPartyUserMapper.findByName(crmPartyUser.getLoginName());
    if (user != null){
        throw new CustomException("该用户已存在！");
    }
}