struts2中重写框架类型转换类StrutsTypeConverter建一个时间转换工具

xwork-conversion.properties
内容：
java.util.Date=util.DateConvert

//继承系统StrutsTypeConverter类
public class DateConvert extends StrutsTypeConverter {
private final SimpleDateFormat[] sdfArr = {
new SimpleDateFormat("yyyy-MM-dd"),
new SimpleDateFormat("yyyy/MM/dd"),
new SimpleDateFormat("yyyy年MM月dd日") };

@Override
public Object convertFromString(Map arg0, String[] arg1, Class arg2) {
System.out.println("进入转换器");
String dateStr = arg1[0];
Date dateResult = null;
for (int i = 0; i < sdfArr.length; i++) {
try {
dateResult = sdfArr[i].parse(dateStr);
System.out.println(dateResult);
break;
} catch (ParseException e) {
System.out.println("第"+(i+1)+"种转换失败："+e.getMessage());
continue;
}
}
return dateResult;
}

@Override
public String convertToString(Map arg0, Object arg1) {
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
String strResult=sdf.format(arg1);
System.out.println(strResult);
return null;
}