Springboot 全局异常捕获以及统一接口返回结果

以前写过一篇全局异常抓取以及日志log使用的文章, 今天我们再来单独优化一下这个全局异常抓取,并结合统一的接口返回类。

 

首先,我们先定义一个错误码接口(其实是返回码接口),里面包含返回码和错误描述,BaseErrorInfoInterface.java :

/**
 * @Author:JCccc
 * @Description:此接口用于返回码枚举使用
 * @Date: created in 15:11 2019/5/3
 */

public interface BaseErrorInfoInterface {
    /** 错误码*/
    String getResultCode();

    /** 错误描述*/
    String getResultMsg();
}

然后是整一个返回码枚举类,CommonEnum.java实现上面的接口:

import com.soelegant.elegantdemo.common.base.BaseErrorInfoInterface;

/**
 * @Author:JCccc
 * @Description:
 * @Date: created in 15:13 2019/5/3
 */
public enum CommonEnum implements BaseErrorInfoInterface {

    // 数据操作错误定义
    SUCCESS("200", "成功!"),
    BODY_NOT_MATCH("400", "请求的数据格式不符!"),
    SIGNATURE_NOT_MATCH("401", "请求的数字签名不匹配!"),
    NOT_FOUND("404", "未找到该资源!"),
    INTERNAL_SERVER_ERROR("500", "服务器内部错误!"),
    SERVER_BUSY("503", "服务器正忙,请稍后再试!"),
    REQUEST_METHOD_SUPPORT_ERROR("40001","当前请求方法不支持");
    /**
     * 错误码
     */
    private String resultCode;
    /**
     * 错误描述
     */
    private String resultMsg;

    CommonEnum(String resultCode, String resultMsg) {
        this.resultCode = resultCode;
        this.resultMsg = resultMsg;
    }

    @Override
    public String getResultCode() {
        return resultCode;
    }

    @Override
    public String getResultMsg() {
        return resultMsg;
    }
}

 然后是响应接口的返回值类,ResultBody.java:

/**
 * @Author:JCccc
 * @Description:
 * @Date: created in 15:19 2019/5/3
 */

public class ResultBody {
    /**
     * 响应代码
     */
    private String code;

    /**
     * 响应消息
     */
    private String message;

    /**
     * 响应结果
     */
    private Object result;

    public ResultBody() {
    }

    public ResultBody(BaseErrorInfoInterface errorInfo) {
        this.code = errorInfo.getResultCode();
        this.message = errorInfo.getResultMsg();
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public Object getResult() {
        return result;
    }

    public void setResult(Object result) {
        this.result = result;
    }

    /**
     * 成功
     *
     * @return
     */
    public static ResultBody success() {
        return success(null);
    }

    /**
     * 成功
     * @param data
     * @return
     */
    public static ResultBody success(Object data) {
        ResultBody rb = new ResultBody();
        rb.setCode(CommonEnum.SUCCESS.getResultCode());
        rb.setMessage(CommonEnum.SUCCESS.getResultMsg());
        rb.setResult(data);
        return rb;
    }





    /**
     * 失败
     */
    public static ResultBody error(BaseErrorInfoInterface errorInfo) {
        ResultBody rb = new ResultBody();
        rb.setCode(errorInfo.getResultCode());
        rb.setMessage(errorInfo.getResultMsg());
        rb.setResult(null);
        return rb;
    }

    /**
     * 失败
     */
    public static ResultBody error(String code, String message) {
        ResultBody rb = new ResultBody();
        rb.setCode(code);
        rb.setMessage(message);
        rb.setResult(null);
        return rb;
    }

    /**
     * 失败
     */
    public static ResultBody error( String message) {
        ResultBody rb = new ResultBody();
        rb.setCode("-1");
        rb.setMessage(message);
        rb.setResult(null);
        return rb;
    }

    @Override
    public String toString() {
        return JSONObject.toJSONString(this);
    }

}

 OK,到此关于返回码的东西以及大致完毕,我们现在开始写关于异常捕捉的。

首先写一个异常类继承RuntimeException,  BizException.java:

/**
 * @Author:JCccc
 * @Description:
 * @Date: created in 15:18 2019/5/3
 */

public class BizException extends RuntimeException {

    private static final long serialVersionUID = 1L;

    /**
     * 错误码
     */
    protected String errorCode;
    /**
     * 错误信息
     */
    protected String errorMsg;

    public BizException() {
        super();
    }

    public BizException(BaseErrorInfoInterface errorInfoInterface) {
        super(errorInfoInterface.getResultCode());
        this.errorCode = errorInfoInterface.getResultCode();
        this.errorMsg = errorInfoInterface.getResultMsg();
    }

    public BizException(BaseErrorInfoInterface errorInfoInterface, Throwable cause) {
        super(errorInfoInterface.getResultCode(), cause);
        this.errorCode = errorInfoInterface.getResultCode();
        this.errorMsg = errorInfoInterface.getResultMsg();
    }

    public BizException(String errorMsg) {
        super(errorMsg);
        this.errorMsg = errorMsg;
    }

    public BizException(String errorCode, String errorMsg) {
        super(errorCode);
        this.errorCode = errorCode;
        this.errorMsg = errorMsg;
    }

    public BizException(String errorCode, String errorMsg, Throwable cause) {
        super(errorCode, cause);
        this.errorCode = errorCode;
        this.errorMsg = errorMsg;
    }


    public String getErrorCode() {
        return errorCode;
    }

    public void setErrorCode(String errorCode) {
        this.errorCode = errorCode;
    }

    public String getErrorMsg() {
        return errorMsg;
    }

    public void setErrorMsg(String errorMsg) {
        this.errorMsg = errorMsg;
    }

    public String getMessage() {
        return errorMsg;
    }

    @Override
    public Throwable fillInStackTrace() {
        return this;
    }

}


接着是,全局异常Handler, GlobalExceptionHandler.java:

/**
 * @Author:JCccc
 * @Description:
 * @Date: created in 15:29 2019/5/3
 */

@ControllerAdvice
public class GlobalExceptionHandler {
    private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    /**
     * 处理自定义的业务异常
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value = BizException.class)
    @ResponseBody
    public ResultBody bizExceptionHandler(HttpServletRequest req, BizException e){
        logger.error("发生业务异常!原因是:{}",e.getErrorMsg());
        return ResultBody.error(e.getErrorCode(),e.getErrorMsg());
    }


    /**
     * 处理空指针的异常
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value =NullPointerException.class)
    @ResponseBody
    public ResultBody exceptionHandler(HttpServletRequest req, NullPointerException e){
        logger.error("发生空指针异常!原因是:",e);
        return ResultBody.error(CommonEnum.BODY_NOT_MATCH);
    }

    /**
     * 处理请求方法不支持的异常
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value =HttpRequestMethodNotSupportedException.class)
    @ResponseBody
    public ResultBody exceptionHandler(HttpServletRequest req, HttpRequestMethodNotSupportedException e){
        logger.error("发生请求方法不支持异常!原因是:",e);
        return ResultBody.error(CommonEnum.REQUEST_METHOD_SUPPORT_ERROR);
    }

    /**
     * 处理其他异常
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value =Exception.class)
    @ResponseBody
    public ResultBody exceptionHandler(HttpServletRequest req, Exception e){
        logger.error("未知异常!原因是:",e);
        return ResultBody.error(CommonEnum.INTERNAL_SERVER_ERROR);
    }



}

 这里可以手动配置自己想抓取的异常以及处理返回码。

 

接着写个Controller来模拟一下异常抛出,抓取,使用统一返回码,UserController.java:

/**
 * @Author:JCccc
 * @Description:
 * @Date: created in 15:50 2019/5/20
 */
@RestController
@RequestMapping("/user")
public class UserController {

 
    @GetMapping("/test")
    public boolean test()  {
        System.out.println("开始...");
        //这里故意造成一个异常,并且不进行处理
        Integer.parseInt("abc123");
        return true;
    }
    @GetMapping("/testNull")
    public boolean testNull() {
        System.out.println("开始...");
        //这里故意造成一个空指针的异常,并且不进行处理
        String str=null;
        str.equals("111");
        return true;
    }
    @PostMapping("/testBizException")
    public boolean testBizException() {

        System.out.println("开始...");
        //如果姓名为空就手动抛出一个自定义的异常!
        String userName=null;
        if(userName==null){
            throw  new BizException("-1","用户姓名不能为空!");
        }
        return true;
    }
    @GetMapping("/testSuccess")
    public ResultBody testSuccess(){
       Map map=new HashMap<>();
        map.put("A","a");
        map.put("B","b");
        map.put("C","c");
        return ResultBody.success(map);
    }

    @RequestMapping("/testError")
    public ResultBody testError(){
        return ResultBody.error("099","错误错误错误");
    }

}




 

OK,接口的调用就不一一展示了,到此。

 

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