JSR303加全局異常處理器

JSR303需要的依賴

 <!--  jsr 303  -->
        <dependency>
            <groupId>javax.el</groupId>
            <artifactId>javax.el-api</artifactId>
            <version>3.0.0</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.web</groupId>
            <artifactId>javax.el</artifactId>
            <version>2.2.4</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate.validator</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>6.0.7.Final</version>
        </dependency>

        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.1.Final</version>
        </dependency>

        <!--  jsr 303  -->

全局異常處理器

package com.hzy.work.aspect;

import com.hzy.work.base.HzyException;
import com.hzy.work.base.JsonResultUtil;
import com.hzy.work.base.Result;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import java.util.List;

/**
 * @author hzy
 * @date 2020/3/24 10:34
 * @description 全局異常處理器
 */
@ControllerAdvice
@ResponseBody
public class ExceptionAspect {

    @ExceptionHandler(value=Exception.class)
    public Result<Object> exceptionHandler(HttpServletRequest request, Exception e){
        System.out.println("進入全局異常處理器");
        e.printStackTrace();
        if (e instanceof MethodArgumentNotValidException){
        	//JSR303異常
        	//這裏需要注意，我這裏是判斷jsr303拋出來的異常是MethodArgumentNotValidException而我在網上看到很多都是BindException，這裏原因在哪我也不知道，如果有知道的也可以和我分享下，謝謝啦
            MethodArgumentNotValidException bindException = (MethodArgumentNotValidException) e;
            return JsonResultUtil.error(bindException.getBindingResult().getAllErrors().iterator().next().getDefaultMessage());
        }else if (e instanceof HzyException){
        	//自定義異常
            HzyException myException = (HzyException)e;
            return JsonResultUtil.error(myException.getMsg());
        }else {
        	//系統bug
            return JsonResultUtil.error("系統內部異常，請聯繫管理員");
        }
    }

}

Controller測試

 @RequestMapping("test")
    public Result test(@Valid @RequestBody Student student){
        Result<Student> result = new Result<>();
        System.out.println("進入test");
        result.setData(student);
        return result;
    }

    /**
     * 測試自定義異常
     * @return
     */
    @RequestMapping("test1")
    public Result test1(){
        Result<String> result = new Result<>();
        System.out.println("進入test  1");
        try{
            int i = 5 / 0;
        }catch (Exception e){
            throw new HzyException(Constants.ERROR,"除數不能爲0");
        }
        return result;
    }

package com.hzy.work.pojo;

import lombok.Data;

import javax.persistence.Entity;
import javax.validation.constraints.*;
import java.util.Date;

/**
 * @author hzy
 * @date 2020/3/23 16:11
 * @description
 */
@Entity
@Data
public class Student {

    @NotBlank(message = "字段no不能爲空")
    @Size(min = 6,max = 32,message = "字段no的長度必須在6-32位")
    private String no;

    @NotBlank(message = "字段name不能爲空")
    @Size(min = 2,max = 32,message = "字段name的長度必須在2-32位")
    private String name;

    @Min(value = 0 ,message = "字段age必須大於等於0")
    @Max(value = 150,message = "字段age必須小於等於150")
    @NotNull(message = "字段age不能爲空")
    private Integer age;

    @Email(message = "字段email請按照郵箱格式填寫")
    private String email;

    @Past(message = "字段birthday必須是今天之前")
    private Date birthday;

    @AssertTrue(message = "字段status必須是true")
    private Boolean status;
}