feat：增加controller层的异常处理

src/main/java/com/dpkj/common/exception/ControllerAdvice.java

@@ -0,0 +1,141 @@
+package com.dpkj.common.exception;
+
+import com.dpkj.common.vo.Result;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.stereotype.Component;
+import org.springframework.stereotype.Controller;
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.FieldError;
+import org.springframework.web.HttpRequestMethodNotSupportedException;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.MissingServletRequestParameterException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+import org.springframework.web.method.annotation.MethodArgumentTypeMismatchException;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * controller控制器异常处理接口实现类
+ * <p>其它module可以集成此类进行controller层的异常处理</p>
+ * @author <a href="https://gitee.com/shi-chongli">石头人</a>
+ */
+@Slf4j
+@Component
+@RestControllerAdvice(annotations = {RestController.class, Controller.class})
+public class ControllerAdvice {
+
+    /**
+     * controller方法中的参数校验失败，但是前提是要使用
+     * #@Validated注解开启参数校验
+     *
+     * @param e 异常
+     * @return Result
+     */
+    @ExceptionHandler(value = MethodArgumentNotValidException.class)
+    public Result<String> bindingException(MethodArgumentNotValidException e) {
+        // 获得所有校验出错的返回集
+        BindingResult bindingResult = e.getBindingResult();
+        List<FieldError> fieldErrors = bindingResult.getFieldErrors();
+        // 循环获得所有校验异常的字段
+        Map<String, String> fieldMap = new HashMap<>();
+        for (FieldError fieldError : fieldErrors) {
+            fieldMap.put(fieldError.getField(), fieldError.getDefaultMessage());
+        }
+
+        String errMsg = fieldMap.values().toString().replaceAll("]", "").replaceAll("\\[", "");
+        log.warn(errMsg);
+        // 返回给前端
+        return Result.error(errMsg);
+    }
+
+    /**
+     * 处理空指针异常
+     * @param nullPointerException 空指针异常
+     * @return Result
+     */
+    @ExceptionHandler(value = java.lang.NullPointerException.class)
+    public Result<String> nullPointException(java.lang.NullPointerException nullPointerException) {
+        log.error("空指针异常类型: {},信息: {}", nullPointerException.getClass(),nullPointerException.getMessage());
+        return Result.error(ErrorEnum.NULL_POINTER_EXCEPTION);
+    }
+
+    /**
+     * 所有的运行时异常，抛出异常
+     * @param throwable 异常
+     * @return Result
+     */
+    @ExceptionHandler(value = Throwable.class)
+    public Result<String> handleException(Throwable throwable) {
+        log.error("异常类型: {}, {}, 信息为: {}", throwable.getCause(), throwable.getClass(), throwable.getMessage());
+        if (throwable instanceof RRException){
+            RRException rrException = (RRException) throwable;
+            return Result.error(rrException.getCode(), rrException.getMsg());
+        }
+        return Result.error(ErrorEnum.RUNTIME_EXCEPTION);
+    }
+
+    /**
+     * http信息无可读
+     * @param e 异常
+     * @return Result
+     */
+    @ExceptionHandler(value = HttpMessageNotReadableException.class)
+    public Result<String> httpMessageNotReadAbleException(HttpMessageNotReadableException e){
+        log.warn("异常类型: {} 无可读信息: {}", e.getClass(), e.getMessage());
+        return Result.error(ErrorEnum.HTTP_MESSAGE_NOT_READABLE_EXCEPTION);
+    }
+
+    /**
+     * 运行时异常
+     * @param e 运行异常对象
+     * @return Result
+     */
+    @ExceptionHandler(value = RuntimeException.class)
+    public Result<String> runtimeException(RuntimeException e){
+        if (!e.getMessage().isEmpty()){
+            log.error("运行时异常 消息为: {}", e.getMessage());
+        }
+        if (e instanceof RRException){
+            RRException rrException = (RRException) e;
+            return Result.error(rrException.getCode(), rrException.getMsg());
+        }
+        return Result.error(ErrorEnum.RUNTIME_EXCEPTION);
+    }
+
+    /**
+     * 请求不支持
+     * @return Result
+     */
+    @ExceptionHandler(value = HttpRequestMethodNotSupportedException.class)
+    public Result<String> httpRequestMethodNotSupportedException(HttpRequestMethodNotSupportedException e){
+        log.warn("暂不支持该请求: {}", e.getMessage());
+        return Result.error("暂不支持此请求方式");
+    }
+
+    /**
+     * 参数类型错误
+     * @return Result
+     */
+    @ExceptionHandler(MethodArgumentTypeMismatchException.class)
+    public Result<String> methodArgument(MethodArgumentTypeMismatchException e){
+        log.warn("参数发生错误: {}", e.getMessage());
+        return Result.error("参数发生错误");
+    }
+
+    /**
+     * 缺少请求参数
+     * @param e 缺少请求参数异常
+     * @return Result
+     */
+    @ExceptionHandler(MissingServletRequestParameterException.class)
+    public Result<String> exception(MissingServletRequestParameterException e){
+        log.warn("缺少请求参数: {}", e.getMessage());
+        return Result.error("缺少请求参数");
+    }
+
+}

src/main/java/com/dpkj/common/exception/ErrorEnum.java

@@ -0,0 +1,70 @@
+package com.dpkj.common.exception;
+
+import lombok.Getter;
+
+
+/**
+ * 错误返回枚举类
+ */
+@Getter
+public enum ErrorEnum implements ErrorInterface{
+
+// ==========================================================================
+
+    /**
+     * 成功范围
+     * @code 200
+     * @apiNote 访问成功
+     */
+    SUCCESS(200, "访问成功"),
+
+    /**
+     * 系统异常
+     * @code 500
+     * @apiNote 系统异常
+     */
+    FAIL(500, "系统异常"),
+
+    /**
+     * 所有的空指针异常
+     * @code 10002
+     * @apiNote 填写信息为空
+     */
+    NULL_POINTER_EXCEPTION(501, "填写信息为空"),
+
+    /**
+     * 运行时异常,
+     * @code 10003
+     * @apiNote 系统发生错误，请联系管理员
+     */
+    RUNTIME_EXCEPTION(502, "系统发生错误，请联系管理员"),
+
+    /**
+     * Http传入的参数没有可以读的数据
+     * @code 10004
+     * @apiNote 传入的数据不可读
+     */
+    HTTP_MESSAGE_NOT_READABLE_EXCEPTION(503, "传入的数据不可读"),
+
+
+
+// ==========================================================================
+
+    ;
+    private final Integer code;
+    private final String message;
+    ErrorEnum(Integer code, String message){
+        this.message = message;
+        this.code = code;
+    }
+
+    @Override
+    public int getCode(){
+        return this.code;
+    }
+
+    @Override
+    public String getMessage(){
+        return this.message;
+    }
+}

src/main/java/com/dpkj/common/exception/ErrorInterface.java

@@ -0,0 +1,23 @@
+package com.dpkj.common.exception;
+
+/**
+ * 错误枚举接口，所有的错误枚举都需要实现该接口,如果需要自定义
+ *      错误信息，可通过实现该接口与RespBean进行使用
+ *
+ * @author <a href="https://gitee.com/shi-chongli">石头人</a>
+ * @see com.dpkj.common.vo.Result
+ * @since 2023-07-27 13:05:00
+ */
+public interface ErrorInterface {
+
+    /**
+     * 获取响应码
+     */
+    int getCode();
+
+    /**
+     * 获取响应信息
+     */
+    String getMessage();
+
+}

src/main/java/com/dpkj/common/exception/RRException.java

@@ -0,0 +1,59 @@
+package com.dpkj.common.exception;
+
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+/**
+ * 总的异常，所有的自定义异常都需要继承类
+ *
+ * @author <a href="https://gitee.com/shi-chongli">石头人</a>
+ * @since 2023-07-24 09:42:00
+ */
+@EqualsAndHashCode(callSuper = true)
+@Data
+public class RRException extends RuntimeException{
+
+    private static final long serialVersionUID = 1L;
+
+    private String msg;
+    private int code = 500;
+
+    public RRException(){
+        super("系统错误");
+        this.msg = "系统错误";
+    }
+
+    public RRException(Throwable throwable){
+        super(throwable);
+    }
+
+    public RRException(String msg) {
+        super(msg);
+        this.msg = msg;
+    }
+
+    public RRException(String msg, Throwable e) {
+        super(msg, e);
+        this.msg = msg;
+    }
+
+    public RRException(int code, String msg) {
+        super(msg);
+        this.msg = msg;
+        this.code = code;
+    }
+    public RRException(ErrorInterface error){
+        super(error.getMessage());
+        this.code = error.getCode();
+        this.msg = error.getMessage();
+    }
+
+    public RRException(int code,String msg, Throwable e) {
+        super(msg, e);
+        this.msg = msg;
+        this.code = code;
+    }
+
+}
+

src/main/java/com/dpkj/common/vo/Result.java

@@ -1,6 +1,7 @@
 package com.dpkj.common.vo;
 
 import com.dpkj.common.constant.CommonConst;
+import com.dpkj.common.exception.ErrorEnum;
 import lombok.Data;
 
 import java.io.Serializable;
@@ -69,6 +70,14 @@ public class Result<T> implements Serializable {
         return error(CommonConst.SC_500, msg, null);
     }
 
+    public static <T> Result<T> error(ErrorEnum errorEnum) {
+        return error(errorEnum.getCode(), errorEnum.getMessage(), null);
+    }
+
+    public static <T> Result<T> error(int code, String message) {
+        return error(code, message, null);
+    }
+
     public static <T> Result<T> error(int code, String msg, T data) {
         Result<T> r = new Result<T>();
         r.setCode(code);