川哥哥

public class ConversionAction extends ActionSupport {
    private Date date;

    @Override
    public String execute() throws Exception {
        return SUCCESS;
    }

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

public class DateConversion extends StrutsTypeConverter {
    private static final List<SimpleDateFormat> list=new ArrayList<SimpleDateFormat>();
    static {
        list.add(new SimpleDateFormat("yyyy-MM-dd"));
        list.add(new SimpleDateFormat("yyyy年MM月dd日"));
        list.add(new SimpleDateFormat("yyyy/MM/dd"));
        list.add(new SimpleDateFormat("yyyy.MM.dd"));
    }
    public Object convertFromString(Map map, String[] strings, Class aClass) {
        //獲取日期的字符串
        String date=strings[0];
        for(SimpleDateFormat item:list){
            try {
                //把String類型轉為Date
                Date parse = item.parse(date);
                return parse;
            } catch (ParseException e) {
                continue;
            }
        }
        //如果遍歷完畢后扔沒有轉換成功，表明出現轉換異常
       throw new TypeConversionException();
    }

    public String convertToString(Map map, Object obj) {
        Date date=(Date)obj;
        //輸出格式
        return new SimpleDateFormat("yyyy-MM-dd").format(date);
    }
}

 <form action="conversion" method="post">
        日期<input name="date">
        <input type="submit" value="提交">
    </form>

 <action name="conversion" class="cn.happy.action.ConversionAction" >
            <!--轉換失敗，進入login.jsp頁面-->
            <result name="input">login.jsp</result>
            <result name="success">sucess.jsp</result>
        </action>