全局异常处理 ---＞ 封装统一格式进行返回

全局异常处理

1、响应结果集封装

public class ResponseResult<T> implements Serializable {
    private Integer code;
    private String msg;
    private T data;

    public ResponseResult() {
        this.code = AppHttpCodeEnum.SUCCESS.getCode();
        this.msg = AppHttpCodeEnum.SUCCESS.getMsg();
    }

    public ResponseResult(Integer code, T data) {
        this.code = code;
        this.data = data;
    }

    public ResponseResult(Integer code, String msg, T data) {
        this.code = code;
        this.msg = msg;
        this.data = data;
    }

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

    public static ResponseResult errorResult(int code, String msg) {
        ResponseResult result = new ResponseResult();
        return result.error(code, msg);
    }

    public static ResponseResult okResult() {
        ResponseResult result = new ResponseResult();
        return result;
    }

    public static ResponseResult okResult(int code, String msg) {
        ResponseResult result = new ResponseResult();
        return result.ok(code, null, msg);
    }

    public static ResponseResult okResult(Object data) {
        ResponseResult result = setAppHttpCodeEnum(AppHttpCodeEnum.SUCCESS, AppHttpCodeEnum.SUCCESS.getMsg());
        if (data != null) {
            result.setData(data);
        }
        return result;
    }

    public static ResponseResult errorResult(AppHttpCodeEnum enums) {
        return setAppHttpCodeEnum(enums, enums.getMsg());
    }

    public static ResponseResult errorResult(AppHttpCodeEnum enums, String msg) {
        return setAppHttpCodeEnum(enums, msg);
    }

    public static ResponseResult setAppHttpCodeEnum(AppHttpCodeEnum enums) {
        return okResult(enums.getCode(), enums.getMsg());
    }

    private static ResponseResult setAppHttpCodeEnum(AppHttpCodeEnum enums, String msg) {
        return okResult(enums.getCode(), msg);
    }

    public ResponseResult<?> error(Integer code, String msg) {
        this.code = code;
        this.msg = msg;
        return this;
    }

    public ResponseResult<?> ok(Integer code, T data) {
        this.code = code;
        this.data = data;
        return this;
    }

    public ResponseResult<?> ok(Integer code, T data, String msg) {
        this.code = code;
        this.data = data;
        this.msg = msg;
        return this;
    }

    public ResponseResult<?> ok(T data) {
        this.data = data;
        return this;
    }

    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;
    }
}

2、异常响应状态枚举类

public enum AppHttpCodeEnum {
    /**
     * 操作成功
     */
    SUCCESS(200,"操作成功"),
    SYSTEM_ERROR(504,"系统未知错误"),
    LOGIN_ERROR(505,"除数不能为0");
    final int code;
    final String msg;

    AppHttpCodeEnum(int code, String errorMessage){
        this.code = code;
        this.msg = errorMessage;
    }

    public int getCode() {
        return code;
    }

    public String getMsg() {
        return msg;
    }
}

3、自定义全局异常类

public class SystemException extends RuntimeException{

    private int code;

    private String msg;

    public int getCode() {
        return code;
    }

    public String getMsg() {
        return msg;
    }

    public SystemException(AppHttpCodeEnum httpCodeEnum) {
        super(httpCodeEnum.getMsg());
        this.code = httpCodeEnum.getCode();
        this.msg = httpCodeEnum.getMsg();
    }

}

4、配置全局异常处理

/**
 * 全局异常处理
 * @author YLi_Jing
 */
@RestControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(SystemException.class)
    public ResponseResult systemExceptionHandler(SystemException e){
        //从异常对象中获取提示信息封装返回
        return ResponseResult.errorResult(e.getCode(),e.getMsg());
    }


    @ExceptionHandler(Exception.class)
    public ResponseResult exceptionHandler(Exception e){
        //从异常对象中获取提示信息封装返回
        return ResponseResult.errorResult(AppHttpCodeEnum.SYSTEM_ERROR.getCode(),e.getMessage());
    }
}