首先定义一个时间转换器的类DateAdvice,在springmvc中DateFormat不能是数组,所以就重写CustomDateEditor类并且命名为
MyCustomDateEditor类
@ControllerAdvice public class DateAdvice { @InitBinder public void init(WebDataBinder binder){ DateFormat[] dateFormat={ new SimpleDateFormat("yyyy-MM-dd"), new SimpleDateFormat("yyyy/MM/dd"), new SimpleDateFormat("yyyy.MM.dd"), new SimpleDateFormat("yyyy年MM月dd日") }; MyCustomDateEditor customDateEditor = new MyCustomDateEditor(dateFormat,true); binder.registerCustomEditor(Date.class,customDateEditor); } }
接下来就对MyCustomDateEditor进行修改
public class MyCustomDateEditor extends PropertyEditorSupport { private final DateFormat[] dateFormat; private final boolean allowEmpty; private final int exactDateLength; /** * Create a new CustomDateEditor instance, using the given DateFormat * for parsing and rendering. * <p>The "allowEmpty" parameter states if an empty String should * be allowed for parsing, i.e. get interpreted as null value. * Otherwise, an IllegalArgumentException gets thrown in that case. * @param dateFormat the DateFormat to use for parsing and rendering * @param allowEmpty if empty strings should be allowed */ public MyCustomDateEditor(DateFormat[] dateFormat, boolean allowEmpty) { this.dateFormat = dateFormat; this.allowEmpty = allowEmpty; this.exactDateLength = -1; } /** * Create a new CustomDateEditor instance, using the given DateFormat * for parsing and rendering. * <p>The "allowEmpty" parameter states if an empty String should * be allowed for parsing, i.e. get interpreted as null value. * Otherwise, an IllegalArgumentException gets thrown in that case. * <p>The "exactDateLength" parameter states that IllegalArgumentException gets * thrown if the String does not exactly match the length specified. This is useful * because SimpleDateFormat does not enforce strict parsing of the year part, * not even with {@code setLenient(false)}. Without an "exactDateLength" * specified, the "01/01/05" would get parsed to "01/01/0005". However, even * with an "exactDateLength" specified, prepended zeros in the day or month * part may still allow for a shorter year part, so consider this as just * one more assertion that gets you closer to the intended date format. * @param dateFormat the DateFormat to use for parsing and rendering * @param allowEmpty if empty strings should be allowed * @param exactDateLength the exact expected length of the date String */ public MyCustomDateEditor(DateFormat[] dateFormat, boolean allowEmpty, int exactDateLength) { this.dateFormat = dateFormat; this.allowEmpty = allowEmpty; this.exactDateLength = exactDateLength; } /** * Parse the Date from the given text, using the specified DateFormat. */ @Override public void setAsText(@Nullable String text) throws IllegalArgumentException { if (this.allowEmpty && !StringUtils.hasText(text)) { // Treat empty String as null value. setValue(null); } else if (text != null && this.exactDateLength >= 0 && text.length() != this.exactDateLength) { throw new IllegalArgumentException( "Could not parse date: it is not exactly" + this.exactDateLength + "characters long"); } else { boolean flag = false; for (DateFormat df : dateFormat) { try { setValue(df.parse(text)); flag = true; break; } catch (ParseException ex) { continue; } } if (flag == false) { throw new IllegalArgumentException("Could not parse date: "); } } } /** * Format the Date as String, using the specified DateFormat. */ @Override public String getAsText() { Date value = (Date) getValue(); for (DateFormat df : dateFormat) { try { return df.format(value); } catch (Exception e) { continue; } } return ""; } }
注意:主要是为了把DateFormat转为数组,这样就进行了多种日期转换