FindBugs警告(may expose internal representation)

在编写JavaBean时，如果类内部的成员变量为一个对象类型，用FindBugs扫描后可能会产生如下警告：

M V EI: com.digu.api.db.model.HuotuSnsUserModel.getAddDate() may expose internal representation by returning HuotuSnsUserModel.addDate

 

 

public class StudentBean 
{
	private Date addDate;

	public Date getAddDate() 
	{
		return addDate;
	}

	public void setAddDate(Date addDate) 
	{
		this.addDate = addDate;
	}
}

 

 

为消除警告，可以进行如下修改：

 

public class StudentBean 
{
	private Date addDate;

	public Date getAddDate() 
	{
		if (addDate == null)
		{
			return null;
		}
		return (Date)addDate.clone();
	}

	public void setAddDate(Date addDate) 
	{
		if (addDate == null)
		{
			this.addDate = null;
		} else {
			this.addDate = (Date)addDate.clone();
		}
	}
}

 

测试代码：

 
public static void main(String[] args) throws InterruptedException 
{
 	StudentBean model = new StudentBean();
 	Date date = new Date();
 	model.setAddDate(date);
 	System.out.println(model.getAddDate().getTime());
	Thread.sleep(2000);
 	date.setTime(new Date().getTime());
 	System.out.println(model.getAddDate().getTime());
 }

 

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