1.系统异常捕获
@ControllerAdvice(annotations = {RestController.class})
public class GlobalExceptionHandler {
private Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);
/**
* 系统异常处理，比如：404,500
* @param req
* @param e
* @return
* @throws Exception
*/
@ExceptionHandler(value = Exception.class)
@ResponseBody
public BaseResp<?> defaultErrorHandler(HttpServletRequest req, Exception e) throws Exception {
logger.error("", e);
BaseResp baseResp = new BaseResp();
baseResp.setMessage(e.getMessage());
if (e instanceof org.springframework.web.servlet.NoHandlerFoundException) {
baseResp.setCode(ResultStatus.http_status_not_found.getErrorCode());
} else {
baseResp.setCode(ResultStatus.http_status_internal_server_error.getErrorCode());
}
baseResp.setData("");
return baseResp;
}
}
2.数据返回统一格式
public class BaseResp<T> {
private int code;//返回码
private String message;//返回信息描述
private T data;//返回数据
private long currentTime;//返回时间戳
public BaseResp(int code,String message,T data){
this.code = code;
this.message = message;
this.data = data;
this.currentTime = System.currentTimeMillis();
}
public BaseResp(ResultStatus resultStatus){
this(resultStatus.getErrorCode(),resultStatus.getErrorMsg(),null);
}
public BaseResp(ResultStatus resultStatus,T data){
this(resultStatus.getErrorCode(),resultStatus.getErrorMsg(),data);
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public T getData() {
return data;
}
public void setData(T data) {
this.data = data;
}
public long getCurrentTime() {
return currentTime;
}
public void setCurrentTime(long currentTime) {
this.currentTime = currentTime;
}
}
3.错误码
public enum ResultStatus {
// -1为通用失败（根据ApiResult.java中的构造方法注释而来）
FAIL(-1, "common fail"),
// 0为成功
SUCCESS(0, "success"),
error_pic_file(3,"非法图片文件"),
error_pic_upload(4,"图片上传失败"),
error_record_not_found(5, "没有找到对应的数据"),
error_max_page_size(6, "请求记录数超出每次请求最大允许值"),
error_create_failed(7,"新增失败"),
error_update_failed(8,"修改失败"),
error_delete_failed(9,"删除失败"),
error_search_failed(10,"查询失败"),
error_count_failed(11,"查询数据总数失败"),
error_string_to_obj(12,"字符串转java对象失败"),
error_invalid_argument(13,"参数不合法"),
error_update_not_allowed(14,"更新失败：%s"),
error_duplicated_data(15,"数据已存在"),
error_unknown_database_operation(16,"未知数据库操作失败，请联系管理员解决"),
error_column_unique(17,"字段s%违反唯一约束性条件"),
error_file_download(18,"文件下载失败"),
error_file_upload(19,"文件上传失败"),
//100-511为http 状态码
// --- 4xx Client Error ---
http_status_bad_request(400, "Bad Request"),
http_status_unauthorized(401, "Unauthorized"),
http_status_payment_required(402, "Payment Required"),
http_status_forbidden(403, "Forbidden"),
http_status_not_found(404, "Not Found"),
http_status_method_not_allowed(405, "Method Not Allowed"),
http_status_not_acceptable(406, "Not Acceptable"),
http_status_proxy_authentication_required(407, "Proxy Authentication Required"),
http_status_request_timeout(408, "Request Timeout"),
http_status_conflict(409, "Conflict"),
http_status_gone(410, "Gone"),
http_status_length_required(411, "Length Required"),
http_status_precondition_failed(412, "Precondition Failed"),
http_status_payload_too_large(413, "Payload Too Large"),
http_status_uri_too_long(414, "URI Too Long"),
http_status_unsupported_media_type(415, "Unsupported Media Type"),
http_status_requested_range_not_satisfiable(416, "Requested range not satisfiable"),
http_status_expectation_failed(417, "Expectation Failed"),
http_status_im_a_teapot(418, "I'm a teapot"),
http_status_unprocessable_entity(422, "Unprocessable Entity"),
http_status_locked(423, "Locked"),
http_status_failed_dependency(424, "Failed Dependency"),
http_status_upgrade_required(426, "Upgrade Required"),
http_status_precondition_required(428, "Precondition Required"),
http_status_too_many_requests(429, "Too Many Requests"),
http_status_request_header_fields_too_large(431, "Request Header Fields Too Large"),
// --- 5xx Server Error ---
http_status_internal_server_error(500, "系统错误"),
http_status_not_implemented(501, "Not Implemented"),
http_status_bad_gateway(502, "Bad Gateway"),
http_status_service_unavailable(503, "Service Unavailable"),
http_status_gateway_timeout(504, "Gateway Timeout"),
http_status_http_version_not_supported(505, "HTTP Version not supported"),
http_status_variant_also_negotiates(506, "Variant Also Negotiates"),
http_status_insufficient_storage(507, "Insufficient Storage"),
http_status_loop_detected(508, "Loop Detected"),
http_status_bandwidth_limit_exceeded(509, "Bandwidth Limit Exceeded"),
http_status_not_extended(510, "Not Extended"),
http_status_network_authentication_required(511, "Network Authentication Required"),
// --- 8xx common error ---
EXCEPTION(800, "exception"),
INVALID_PARAM(801, "invalid.param"),
INVALID_PRIVI(802, "invalid.privi"),
//1000以内是系统错误，
no_login(1000,"没有登录"),
config_error(1001,"参数配置表错误"),
user_exist(1002,"用户名已存在"),
userpwd_not_exist(1003,"用户名不存在或者密码错误"),
;
private static final Logger LOGGER = LoggerFactory.getLogger(ResultStatus.class);
private int code;
private String msg;
ResultStatus(int code, String msg){
this.code = code;
this.msg = msg;
}
public static int getCode(String define){
try {
return ResultStatus.valueOf(define).code;
} catch (IllegalArgumentException e) {
LOGGER.error("undefined error code: {}", define);
return FAIL.getErrorCode();
}
}
public static String getMsg(String define){
try {
return ResultStatus.valueOf(define).msg;
} catch (IllegalArgumentException e) {
LOGGER.error("undefined error code: {}", define);
return FAIL.getErrorMsg();
}
}
public static String getMsg(int code){
for(ResultStatus err : ResultStatus.values()){
if(err.code==code){
return err.msg;
}
}
return "errorCode not defined ";
}
public int getErrorCode(){
return code;
}
public String getErrorMsg(){
return msg;
}
}