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SpringMVC中怎么对异常进行处理，很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。
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ResultCode
CommonCode
UserCode
CustomException
ExceptionCatch
org.springframework.boot spring-boot-starter-parent 2.1.9.RELEASE org.springframework.boot spring-boot-starter-web
统一异常处理
@ControllerAdvice
@ExceptionHandler
@ResponseBody
package com.mozq.mybatisplus.mybatisplus01.exception;
import com.mozq.mybatisplus.mybatisplus01.model.CommonCode;
import com.mozq.mybatisplus.mybatisplus01.model.Result;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
@ControllerAdvice
public class ExceptionCatch {
@ExceptionHandler(Exception.class)
@ResponseBody
public Result handleException(Exception e){
return Result.of(CommonCode.SERVER_ERROR);
}
@ExceptionHandler(CustomException.class)
@ResponseBody
public Result handleException(CustomException e){
return Result.of(e.getResultCode());
}
}package com.mozq.mybatisplus.mybatisplus01.exception;
import com.mozq.mybatisplus.mybatisplus01.model.ResultCode;
public class CustomException extends RuntimeException {
private ResultCode resultCode;
public CustomException(ResultCode resultCode){
super("错误码：" + resultCode.code() + "错误消息：" + resultCode.message());
this.resultCode = resultCode;
}
public ResultCode getResultCode(){
return resultCode;
}
}异常处理测试
@RestController
@RequestMapping("/demo")
public class DemoController {
//单个参数非空校验，使用@RequestParam
@RequestMapping("/get")
public String getName(@RequestParam String name){
return name;
}
/*
public Result myCustomException(boolean flag)
不传参数默认false
0-false 1-true 其他数字抛异常 MethodArgumentTypeMismatchException
正确方式：
localhost:8080/demo/myCustomException?flag=1
localhost:8080/demo/myCustomException?flag=true
*/
@RequestMapping("/myCustomException")
public Result myCustomException(boolean flag){
if(flag){
throw new CustomException(UserCode.USER_NOT_EXIST);
}
return Result.ok();
}
}统一响应结果
package com.mozq.mybatisplus.mybatisplus01.model;
import lombok.Data;
import java.util.LinkedHashMap;
@Data
public class Result extends LinkedHashMap {
private static final String SUCCESS = "success";
private static final String CODE = "code";
private static final String MESSAGE = "message";
private static final String RESULT = "result";
public static Result of(ResultCode resultCode){
Result R = new Result();
R.put(SUCCESS, resultCode.success());
R.put(CODE, resultCode.code());
R.put(MESSAGE, resultCode.message());
return R;
}
public static Result ok(){
return Result.of(CommonCode.SUCCESS);
}
public static Result okWithResult(Object data){
Result R = Result.of(CommonCode.SUCCESS);
R.put(RESULT, data);
return R;
}
public static Result fail(){
return Result.of(CommonCode.FAIL);
}
}响应状态码
package com.mozq.mybatisplus.mybatisplus01.model;
public interface ResultCode {
boolean success();
String code();
String message();
}package com.mozq.mybatisplus.mybatisplus01.model;
public enum CommonCode implements ResultCode {
SUCCESS(true, "000000", "处理成功"),
FAIL(true, "000001", "处理失败"),
INVALID_PARAM(false, "100000", "无效的参数"),
SERVER_ERROR(false, "999999", "系统忙，请稍后重试");
private boolean success;
private String code;
private String message;
CommonCode(boolean success, String code, String message){
this.success = success;
this.code = code;
this.message = message;
}
@Override
public boolean success() {
return success;
}
@Override
public String code() {
return code;
}
@Override
public String message() {
return message;
}
}package com.mozq.mybatisplus.mybatisplus01.model;
public enum UserCode implements ResultCode {
USER_USERNAME_ALREADY_EXIST(false, "200000", "用户名已经存在"),
USER_TELEPHONE_ALREADY_USED(false, "200001", "电话号码已经存在"),
USER_NOT_EXIST(false, "200002", "用户不存在");
private boolean success;
private String code;
private String message;
UserCode(boolean success, String code, String message){
this.success = success;
this.code = code;
this.message = message;
}
@Override
public boolean success() {
return success;
}
@Override
public String code() {
return code;
}
@Override
public String message() {
return message;
}
}看完上述内容是否对您有帮助呢？如果还想对相关知识有进一步的了解或阅读更多相关文章，请关注创新互联行业资讯频道，感谢您对创新互联的支持。