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java 使用 instanceof 關鍵字,捕獲自定義異常

/**
 * 業務級異常
 */
public class BusinessException extends Exception{
private String errMsg;
private int errCode;
public String getErrMsg() {
return errMsg;
}
public void setErrMsg(String errMsg) {
this.errMsg = errMsg;
}
public int getErrCode() {
return errCode;
}
public void setErrCode(int errCode) {
this.errCode = errCode;
}
public BusinessException() {}

public BusinessException(String errMsg) {
this.errMsg = errMsg;
this.errCode = ErrCode.USER_OP_ERROR;
}
public BusinessException(String errMsg, int errCode) {
this.errMsg = errMsg;
this.errCode = errCode;
}
}