springboot2.0 全局异常处理以及状态码处理 (ainusers亲测)

目前我这里处理的一种是404、500等状态码，另外一个就是自定义code码在程序中try()catch(){}的时候throw()

这两个基本可以覆盖全了

一、先说状态码吧

/**
 * @author: tianyong
 * @Time: 2019/7/3 11:00
 * @description:错误码包装枚举类
 */
public enum CodeInfo {


    //状态码
    STATUS_CODE_400(400,"请求无效"),
    STATUS_CODE_403(403,"禁止访问"),
    STATUS_CODE_404(404,"请求的网页不存在"),
    STATUS_CODE_405(405,"资源被禁止"),
    STATUS_CODE_500(500,"内部服务器错误,请联系管理员"),

    //自定义状态码
    CHART_INVALID_PARAM(100002,"图表请求参数错误"),
    PAGE_INVALID_PARAM(100003,"页面请求参数错误"),
    MENU_INVALID_PARAM(100004,"菜单请求参数错误"),
    CHART_FIND_SUCCESS(100005,"查询结果为空");
    ......


    private String msg;
    private Integer code;

    CodeInfo(Integer code, String msg) {
        this.msg = msg;
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

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

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    @Override
    public String toString() {
        return "CodeInfo{" +
                "msg='" + msg + '\'' +
                ", code=" + code +
                '}';
    }
}

/**
 * @author: tianyong
 * @Time: 2019/7/15 15:54
 * @description:状态码配置类
 */
@Controller
public class StatusCodeConfig implements ErrorController {


    /**
      * @author: tianyong
      * @time: 2019/7/16 11:36
      * @description:指定跳转路径/error
      */
    @Override
    public String getErrorPath() {
        return "/error";
    }


    /**
      * @author: tianyong
      * @time: 2019/7/16 11:37
      * @description:处理错误状态码
      */
    @RequestMapping("/error")
    public String handleError(HttpServletRequest request) {
        Integer statusCode = (Integer) request.getAttribute("javax.servlet.error.status_code");
        if(statusCode == 400) {
            return "/400";
        }else if(statusCode == 403) {
            return "/403";
        }else if(statusCode == 404) {
            return "/404";
        }else if(statusCode == 405) {
            return "/405";
        }else if(statusCode == 500) {
            return "/500";
        }else{
            return "/500";
        }
    }


    /**
      * @author: tianyong
      * @time: 2019/7/15 16:14
      * @description:400 请求无效
      */
    @ResponseBody
    @RequestMapping("/400")
    public ReturnBone error400 (){
        return error(CodeInfo.STATUS_CODE_400);
    }


    /**
     * @author: tianyong
     * @time: 2019/7/15 16:14
     * @description:403 禁止访问
     */
    @ResponseBody
    @RequestMapping("/403")
    public ReturnBone error403 (){
        return error(CodeInfo.STATUS_CODE_403);
    }


    /**
     * @author: tianyong
     * @time: 2019/7/15 16:14
     * @description:404 请求的网页不存在
     */
    @ResponseBody
    @RequestMapping("/404")
    public ReturnBone error404 (){
        return error(CodeInfo.STATUS_CODE_404);
    }


    /**
     * @author: tianyong
     * @time: 2019/7/15 16:14
     * @description:405 资源被禁止
     */
    @ResponseBody
    @RequestMapping("/405")
    public ReturnBone error405 (){
        return error(CodeInfo.STATUS_CODE_405);
    }


    /**
     * @author: tianyong
     * @time: 2019/7/15 16:14
     * @description:500 内部服务器错误,请联系管理员
     */
    @ResponseBody
    @RequestMapping("/500")
    public ReturnBone error500 (){
        return error(CodeInfo.STATUS_CODE_500);
    }

}

状态码的使用，当程序遇到空指针，此时没有用自定义code码包裹，就会用到返回500的状态码

二、自定义code码

/**
 * @author: tianyong
 * @Time: 2019/6/4 11:27
 * @description:resultful接口返回结构
 */
public class ReturnBone {

    /*返回码*/
    private Integer code;

    /*提示信息 */
    private String msg;

    /*数据*/
    private  T data;

    public ReturnBone() {}

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

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

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }

    @Override
    public String toString() {
        return "ReturnBone{" +
                "code=" + code +
                ", msg='" + msg + '\'' +
                ", data=" + data +
                '}';
    }
}

/**
 * @author: tianyong
 * @Time: 2019/7/16 11:01
 * @description:状态码对象(错误)
 */
public class StatusCodeBO extends RuntimeException{


    private CodeInfo codeInfo;


    public StatusCodeBO(CodeInfo codeInfo){
        this.codeInfo = codeInfo;
        makeInfo();
    }


    public ReturnBone makeInfo() {
        ReturnBone rb = new ReturnBone();
        rb.setCode(codeInfo.getCode());
        rb.setMsg(codeInfo.getMsg());
        return rb;
    }


}

/**
 * @author: tianyong
 * @Time: 2019/7/15 16:08
 * @description:自定义异常处理类
 */
@ControllerAdvice
public class CustomExceptionHandler {


    /**
     * @author: tianyong
     * @time: 2019/7/15 16:10
     * @description:自定义异常处理方法
     */
    @ResponseBody
    @ExceptionHandler({StatusCodeBO.class})
    public ReturnBone HandlerException(StatusCodeBO info){
        return info.makeInfo();
    }


}

使用  if(datas.size() == 0) throw new StatusCodeBO(CodeInfo.CHART_FIND_SUCCESS);

好好理解理解，胸弟，我这边针对网上的，和我这里现实的统一封装结果的，做了一些整合，肯定好使的