崛起于Springboot2.X + 统一异常处理（51）

《SpringBoot2.X心法总纲》

      序言：不少时候都要写try catch，因此为了减小代码把异常处理单独拿出来，作一个全局处理，通常公司都是自定义异常为主，今天写一个默认异常和自定义异常的配置，很简单，五分钟就能掌握，并且代码全面，属于企业用法。

一、pom依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>

二、application.properties

server.port=8082

三、响应信息

@Data
@AllArgsConstructor
public class Result {
    private boolean success;
    private String code;
    private String message;
    private Object data;
    public Result() {
        this.success = true;
        this.code = "200";
    }
}

四、自定义异常

@Data
@NoArgsConstructor
@AllArgsConstructor
public class MyException extends RuntimeException {

    /**
     * 异常状态码
     */
    private String code;

    /**
     * 异常信息
     */
    private String message;

    /**
     * 发生的方法
     */
    private String method;

    /**
     * 描述
     */
    private String desc;
}

五、全局异常配置

@ControllerAdvice
public class MyControllerAdvice {

    /**
     * 全局异常处理
     */
    @ResponseBody
    @ExceptionHandler(value = Exception.class)
    public Result exceptionHandler(Exception e){
        Result result = new Result();
        result.setCode("201");
        result.setSuccess(false);
        result.setMessage(e.getMessage());
        //异常业务逻辑处理（日志记录或者其余存储）

        return result;
    }

    /**
     * 自定义异常
     */
    @ResponseBody
    @ExceptionHandler(value = MyException.class)
    public Result exceptionHandler(MyException e) {
        Result result = new Result();
        result.setCode(e.getCode());
        result.setMessage(e.getMessage());
        result.setSuccess(false);
        result.setData(e.getDesc());
        return result;
    }
}

六、Controller层

@Controller
public class FirstController {
    
    @RequestMapping(value = "/test",method = RequestMethod.GET)
    @ResponseBody
    public Result test1() throws Exception {
        throw new Exception("dnwbid");
    }

    @RequestMapping(value = "/test2",method = RequestMethod.GET)
    @ResponseBody
    public Result test2() {
        throw new MyException("201","测试异常保持","testOne","desc");
    }
}

七、测试

        http://localhost:8082/test1

        http://localhost:8082/test2