SpringMVC 日期格式转换（配置方法）

• 在时间（date）属性的字段上加上

  @DateTimeFormat(pattern="xxxx")

• 使用转换器

1. 新增一个类实现Converter接口

   import java.text.SimpleDateFormat;
   import java.util.Date;
   import org.springframework.core.convert.converter.Converter;
   import org.springframework.stereotype.Component;
   public class StringToDateConverter implements Converter<String, Date> {
    private static final String dateFormat = "yyyy-MM-dd HH:mm:ss";
    private static final String shortDateFormat = "yyyy-MM-dd";
    private static final String dateFormat2 = "yyyy/MM/dd HH:mm:ss";
    private static final String shortDateFormat2 = "yyyy/MM/dd";
    private static final String timeFormat = "HH:mm:ss";
    private static final String shortTimeFormat = "HH:mm";
   
    @Override
    public Date convert(String source) {
        if (source == null) {
            return null;
        }
        source = source.trim();
        try {
            SimpleDateFormat formatter;
            if (source.contains("-")) {
                if (source.contains(":")) {
                    formatter = new SimpleDateFormat(dateFormat);
                } else {
                    formatter = new SimpleDateFormat(shortDateFormat);
                }
                Date dtDate = formatter.parse(source);
                return dtDate;
            } else if (source.contains("/")) {
                if (source.contains(":")) {
                    formatter = new SimpleDateFormat(dateFormat2);
                } else {
                    formatter = new SimpleDateFormat(shortDateFormat2);
                }
                Date dtDate = formatter.parse(source);
                return dtDate;
            } else if (!source.contains("/") && !source.contains("-") && source.contains(":")) {
                if (source.length() > 5) {
                    formatter = new SimpleDateFormat(timeFormat);
                    Date dtDate = formatter.parse(source);
                    return dtDate;
                } else {
                    formatter = new SimpleDateFormat(shortTimeFormat);
                    Date dtDate = formatter.parse(source);
                    return dtDate;
                }
   
            }
        } catch (Exception e) {
            throw new RuntimeException(String.format("parser %s to Date fail", source));
        }
   
        throw new RuntimeException(String.format("parser %s to Date fail", source));
   
    }
   }

2. 注册转换器

<mvc:annotation-driven conversion-service="conversionService"/  />
<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
    <property name="converters">
        <list>
            <bean class="转换器的类" />
        </list>
    </property>
</bean>