Spring Boot统一接口返回及全局异常处理的方法
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1、解决方案
定义公共模块,实现统一接口定义规范和异常处理,其他的系统进行依赖和扩展即可。
2、具体实现
2.1 定义状态码统一接口
public interface BaseResultCode{ int getCode(); String getMsg();}
2.2 公共模块状态码枚举类
public enum ResultCode implements BaseResultCode{ OK(200, "成功"), ERROR(300,"系统异常"), NEED_AUTH(301, "非法请求,请重新登录"), PARAMTER_ERROR(302, "参数错误"); //省略其他定义错误码 private int code; private String msg; private ResultCode(int code, String msg) { this.code = code; this.msg = msg; } public static ResultCode getValue(int code) { for (ResultCode errorCode : values()) { if (errorCode.getCode() == code) { return errorCode; } } return null; } //省略Get、Set方法 }
2.3 定义全局自定义异常
public class SysException extends RuntimeException{ private static final long serialVersionUID = 5225171867523879342L; private int code; private String msg; private Object[] params; private BaseResultCode errorCode; public SysException() { super(); } public SysException(String message) { super(message); } public SysException(Throwable cause) { super(cause); } public SysException(int code ,String message) { this.code = code; this.msg = message; } public SysException(int code ,String message, Object[] params) { this(code, message); this.params= params; } public SysException(String message, Throwable cause) { super(message, cause); } public SysException(BaseResultCode errorCode) { this.errorCode = errorCode; } public SysException(String message, Object[] params) { super(message); this.params = params; } public SysException(BaseResultCode errorCode, String message, Object[] params) { this(message, params); this.errorCode = errorCode; } public SysException(String message, Object[] params, Throwable cause) { super(message, cause); this.params = params; } public int getCode() { return code; } public void setCode(int code) { this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public Object[] getParams() { return params; } public void setParams(Object[] params) { this.params = params; } public BaseResultCode getErrorCode() { return errorCode; } public void setErrorCode(BaseResultCode errorCode) { this.errorCode = errorCode; } }
2.4 定义统一接口格式输出类
public class Result implements Serializable{ private static final long serialVersionUID = -1773941471021475043L; private Object data; private int code; private String msg; public Result() { } public Result(int code, Object data, String msg) { this.code = code; this.data = data; this.msg = msg; } public Result(int code, String desc) { this(code, null, desc); } public Result(BaseResultCode errorCode) { this(errorCode.getCode(), null, errorCode.getMsg()); } public static Result success() { return success(null); } public static Result success(Object data) { Result result = new Result(); result.setData(data); result.setCode(ResultCode.OK.getCode()); return result; } public static Result error(String msg) { Result result = new Result(); result.setCode(ResultCode.ERROR.getCode()); result.setMsg(msg); return result; } public static Result error(BaseResultCode baseCode) { Result result = new Result(); result.setCode(baseCode.getCode()); result.setMsg(baseCode.getMsg()); return result; }}
个人建议:统一接口输出类不要定义为泛型类型
2.5 定义统一接口格式输出类
@RestControllerAdvicepublic class SysExceptionHandler{ public static Log logger = LogManager.getLogger(SysExceptionHandler.class); @ExceptionHandler(Exception.class) public Result handleException(HttpServletRequest request, Exception ex) { logger.error("Handle Exception Request Url:{},Exception:{}",request.getRequestURL(),ex); Result result = new Result(); //系统异常 if (ex instanceof SysException) { SysException se = (SysException) ex; BaseResultCode resultCode =se.getErrorCode(); if(resultCode==null) { result = Result.error(se.getMessage()); } else { result = new Result(resultCode.getCode(), StringUtil.isNotEmpty(se.getMessage())?se.getMessage():resultCode.getMsg()); } } //参数错误 else if (ex instanceof ConstraintViolationException) { ConstraintViolationException v = (ConstraintViolationException) ex; String message = v.getConstraintViolations().iterator().next() .getMessage(); result.setCode(ResultCode.PARAMTER_ERROR.getCode()); result.setMsg(ResultCode.PARAMTER_ERROR.getMsg() + ":" + message); } //参数错误 else if (ex instanceof BindException) { BindException v = (BindException) ex; String message = v.getAllErrors().stream().map(ObjectError::getDefaultMessage).collect(Collectors.joining(",")); result.setCode(ResultCode.PARAMTER_ERROR.getCode()); result.setMsg(ResultCode.PARAMTER_ERROR.getMsg() + ":" + message); } //参数错误 else if (ex instanceof MethodArgumentNotValidException) { MethodArgumentNotValidException v = (MethodArgumentNotValidException) ex; String message = v.getBindingResult().getAllErrors().stream().map(ObjectError::getDefaultMessage).collect(Collectors.joining(",")); result.setCode(ResultCode.PARAMTER_ERROR.getCode()); result.setMsg(ResultCode.PARAMTER_ERROR.getMsg() + ":" + message); } else { result = new Result(ResultCode.ERROR.getCode(),ExceptionUtil.getErrorMsg(ex)); } logger.info("exception handle reuslt:" + result); return result; }}
上述定义已经可以实现全局接口和异常的统一处理,但是存在的如下问题
每个controller
都需要返回Reesult类型,且每个方法都需要返回Result.success()
或者Result.success(data)
的结果,有点重复,需要进行优化。
@GetMapping("addUser") public Result add() { for(int i=0;i<10;i++) { TUser user = new TUser(); //user.setOid(IdWorker.getId()); user.setName("shareing_"+i); user.setAge(i); userService.addUser(user); } return Result.success(); }
2.6 接口统一输出优化
实现方式只需要实现ResponseBodyAdvice接口,重写beforeBodyWrite方法接口。
@RestControllerAdvicepublic class ResponseAdvice implements ResponseBodyAdvice<Object>{ private Logger logger = LoggerFactory.getLogger(ResponseAdvice.class); @Override public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) { return true; } @Override public Object beforeBodyWrite(Object o, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) { logger.info("before body write param:{}",o); if(o instanceof String) { //序列化结果输出 return FastJsonUtil.toJSONString(Result.success(o)); } else if (o instanceof Result) { return o; } return Result.success(o); }}
经过优化后,controller
输出可以根据业务的需求定义输出对象。
@GetMapping("getUserByName") public TUser getUserByName1(@RequestParam String name) { logger.info("getUserByName paramter name:"+name); return userService.getUserByName(name); }
2.7 子系统如何实现
子系统引入common的jar包,
<dependency> <groupId>com.xx</groupId> <artifactId>xx-common</artifactId> <version>2.0</version></dependency>
3、子系统定义状态码,实现BaseResultCode接口
public enum OrderModelErrorCode implements BaseResultCode{ ORDER_STATUS_ERROR(1000, "订单状态不正确"); private int code; private String msg; private UserModelErrorCode(int code, String msg) { this.code = code; this.msg = msg; } @Override public int getCode() { return code; } @Override public String getMsg() { return msg; }}
定义异常处理类,继承公共异常处理类SysExceptionHandler
@RestControllerAdvicepublic class OrderModalExceptionHandle extends SysExceptionHandler{ @Override public Result handleException(HttpServletRequest request, Exception ex) { return super.handleException(request, ex); //子系统可以扩展异常处理 }}
子系统使用示例:
@Overridepublic Order getOrder(String orderId){Order order =getOrder(orderId); //相关伪代码if(order.getStatus()>120){ throw new SysException(OrderModelErrorCode.ORDER_STATUS_ERROR); }return order;}
感谢各位的阅读,以上就是“Spring Boot统一接口返回及全局异常处理的方法”的内容了,经过本文的学习后,相信大家对Spring Boot统一接口返回及全局异常处理的方法这一问题有了更深刻的体会,具体使用情况还需要大家实践验证。这里是编程网,小编将为大家推送更多相关知识点的文章,欢迎关注!
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