- **RuntimeException异常自定义**
```java
public class ServiceException extends RuntimeException {

public ServiceException() {
        super();
    }
    
    public ServiceException(String message) {
        super(message);
    }
    
    public ServiceException(String message, Throwable cause) {
        super(message, cause);
    }
    
    public ServiceException(Throwable cause) {
        super(cause);
    }
    
    protected ServiceException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
        super(message, cause, enableSuppression, writableStackTrace);
    }
}
```

- **Exception自定义异常**
```java
public class ServiceException extends Exception{
    public ServiceException() {
    }

public ServiceException(String message) {
        super(message);
    }

public ServiceException(String message, Throwable cause) {
        super(message, cause);
    }

public ServiceException(Throwable cause) {
        super(cause);
    }

public ServiceException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
        super(message, cause, enableSuppression, writableStackTrace);
    }
}
```

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自定义异常

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