如果我们团队在开发项目的时候,程序出现异常是正常的,比如因为业务操作没有按照流程,程序的运行异常等等,我们不可能也不应该每一处异常进行单独处理,或者不处理将异常信息直接抛出给用户,这样会导致用户体验差。
之前章节也讲过
不熟悉的朋友可以去看一下。
我们在上一章节实际上已经介绍过了,但是怕一些人没有看过,这里再进行介绍一次
/**
* 统一返回结果接口
*/
public interface IResultCode {
/**
* 返回码
*
* @return int
*/
int getCode();
/**
* 返回消息
*
* @return String
*/
String getMsg();
}
@Getter
@AllArgsConstructor
public enum ResultCode implements IResultCode{
/**
* 操作成功
*/
SUCCESS(200, "操作成功"),
/**
* 业务异常
*/
FAILURE(400, "业务异常"),
/**
* 服务异常
*/
ERROR(500, "服务异常"),
/**
* 参数错误
*/
GLOBAL_PARAM_ERROR(4000, "参数错误");
/**
* 状态码
*/
final int code;
/**
* 消息内容
*/
final String msg;
}
@Data
@Getter
public class Result implements Serializable {
private static final long serialVersionUID = 1L;
private int code;
private String msg;
private long time;
private T data;
private Result() {
this.time = System.currentTimeMillis();
}
private Result(IResultCode resultCode) {
this(resultCode, null, resultCode.getMsg());
}
private Result(IResultCode resultCode, String msg) {
this(resultCode, null, msg);
}
private Result(IResultCode resultCode, T data) {
this(resultCode, data, resultCode.getMsg());
}
private Result(IResultCode resultCode, T data, String msg) {
this(resultCode.getCode(), data, msg);
}
private Result(int code, T data, String msg) {
this.code = code;
this.data = data;
this.msg = msg;
this.time = System.currentTimeMillis();
}
/**
* 返回状态码
*
* @param resultCode 状态码
* @param 泛型标识
* @return ApiResult
*/
public static Result success(IResultCode resultCode) {
return new Result<>(resultCode);
}
public static Result success(String msg) {
return new Result<>(ResultCode.SUCCESS, msg);
}
public static Result success(IResultCode resultCode, String msg) {
return new Result<>(resultCode, msg);
}
public static Result data(T data) {
return data(data, "处理成功");
}
public static Result data(T data, String msg) {
return data(ResultCode.SUCCESS.code, data, msg);
}
public static Result data(int code, T data, String msg) {
return new Result<>(code, data, data == null ? "承载数据为空" : msg);
}
public static Result fail() {
return new Result<>(ResultCode.FAILURE, ResultCode.FAILURE.getMsg());
}
public static Result fail(String msg) {
return new Result<>(ResultCode.FAILURE, msg);
}
public static Result fail(int code, String msg) {
return new Result<>(code, null, msg);
}
public static Result fail(IResultCode resultCode) {
return new Result<>(resultCode);
}
public static Result fail(IResultCode resultCode, String msg) {
return new Result<>(resultCode, msg);
}
public static Result condition(boolean flag) {
return flag ? success("处理成功") : fail("处理失败");
}
}
@Data
public class BaseException extends RuntimeException {
private static final long serialVersionUID = 5782968730281544562L;
private int status = INTERNAL_SERVER_ERROR.value();
public BaseException() {
}
public BaseException(String message) {
super(message);
}
public BaseException(int status, String message) {
super(message);
this.status = status;
}
}
@Data
public class ValidateCodeException extends RuntimeException {
private static final long serialVersionUID = -7285211528095468156L;
private int status = INTERNAL_SERVER_ERROR.value();
public ValidateCodeException() {
}
public ValidateCodeException(String msg) {
super(msg);
}
public ValidateCodeException(int code, String message) {
super(message);
this.status = code;
}
}
使用**@RestControllerAdvice+@ExceptionHandler**
具体介绍可以看我的全局异常处理介绍这里只说实现过程
@Slf4j
@ResponseBody
@RestControllerAdvice
public class BaseExceptionHandler {
/**
* BaseException 异常捕获处理
* @param ex 自定义BaseException异常类型
* @return Result
*/
@ExceptionHandler(BaseException.class)
public Result<?> handleException(BaseException ex) {
log.error("程序异常:" + ex.toString());
return Result.fail(ex.getStatus(), ex.getMessage());
}
/**
* BaseException 异常捕获处理
* @param ex 自定义BaseException异常类型
* @return Result
*/
@ExceptionHandler(ValidateCodeException.class)
@ResponseStatus
public Result<?> handleValidateCodeException(ValidateCodeException ex) {
log.error("验证码错误:" + ex.getMessage());
return Result.fail(ex.getStatus(), ex.getMessage());
}
/**
* FileNotFoundException,NoHandlerFoundException 异常捕获处理
* @param exception 自定义FileNotFoundException异常类型
* @return Result
*/
@ExceptionHandler({FileNotFoundException.class, NoHandlerFoundException.class})
public Result<?> noFoundException(Exception exception) {
log.error("程序异常==>errorCode:{}, exception:{}", HttpStatus.NOT_FOUND.value(), exception.getMessage());
return Result.fail(HttpStatus.NOT_FOUND.value(), exception.getMessage());
}
/**
* NullPointerException 空指针异常捕获处理
* @param ex 自定义NullPointerException异常类型
* @return Result
*/
@ExceptionHandler
@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
public Result<?> handleException(NullPointerException ex) {
log.error("程序异常:{}" + ex.toString());
return Result.fail(HttpStatus.INTERNAL_SERVER_ERROR.value(), ex.getMessage());
}
/**
* 通用Exception异常捕获
* @param ex 自定义Exception异常类型
* @return Result
*/
@ExceptionHandler
@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
public Result<?> handleException(Exception ex) {
log.error("程序异常:" + ex.toString());
String message = ex.getMessage();
if (StringUtils.contains(message, "Bad credentials")){
message = "您输入的密码不正确";
} else if (StringUtils.contains(ex.toString(), "InternalAuthenticationServiceException")) {
message = "您输入的用户名不存在";
}
return Result.fail(HttpStatus.INTERNAL_SERVER_ERROR.value(), message);
}
}
@RequestMapping("test")
@RestController
public class TestController {
@GetMapping("/base/{name}")
public void BaseException(@PathVariable("name") String name) {
System.out.println("Hello: BaseException "+ name);
throw new BaseException(HttpStatus.MULTI_STATUS,"错误");
}
@GetMapping("/valid/{name}")
public void ValidateCodeException(@PathVariable("name") String name) {
System.out.println("Hello: ValidateCodeException "+ name);
throw new ValidateCodeException(ResultCode.GLOBAL_PARAM_ERROR.getCode(),ResultCode.GLOBAL_PARAM_ERROR.getMsg());
}
}
使用postman分别测试
测试结果如下:
在上面图标记处不知道大家发现一个问题,自定义业务状态码和HttpStatus状态码存在不一致的情况,如果相应自定义的业务状态码,在HttpStatus存在,相应HttpStatus和自定义状态码一致需要怎么办呢?
@Component
@ControllerAdvice
public class GlobalResponseAdvice implements ResponseBodyAdvice {
@Override
public boolean supports(MethodParameter returnType, Class converterType) {
return true;
}
@Override
public Object beforeBodyWrite(Object body,
MethodParameter returnType,
MediaType selectedContentType,
Class selectedConverterType,
ServerHttpRequest request,
ServerHttpResponse response) {
//如果响应结果是JSON数据类型
if(selectedContentType.equalsTypeAndSubtype(
MediaType.APPLICATION_JSON)){
int code= ((Result) body).getCode();
if(code>0 && code<512) {
//HTTP响应结果设置状态码,状态码就是IResultCode的code,二者达到统一
response.setStatusCode(
HttpStatus.valueOf(((Result) body).getCode())
);
}
return body;
}
return body;
}
}
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更新时间:2024-08-19
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