public class User implements serilizable{
    private String name;

    public void setName(String name){
        this.name = name;
    }

    //所说建议的写法,这么写就不会导致不必要的sql update
    public String getName(){
        return new String(name);
    }

    //而大部分通常的写法是
    public String getName(){
        return this.name;
    }
}