springmvc默认无法自动封装枚举类，解决方法如下：

1.枚举类

public enum GoodsPromoteEnum {    /**     * 0 精品     */    fine("精品",0),    /**     * 1 限时购     */    limit("限时购",1),     /**     * 2 特价     */    cheap("特价",2);        private String value;    private int index;    private GoodsPromoteEnum(String value, int index) {        this.value = value;        this.index = index;    }        public  static GoodsPromoteEnum get(String value){        for (GoodsPromoteEnum p : GoodsPromoteEnum.values()) {            if (p.getValue().equals(value)) {                return p;            }        }        return null;    }        public  static GoodsPromoteEnum get(int index){        for (GoodsPromoteEnum p : GoodsPromoteEnum.values()) {            if (p.getIndex() == index) {                return p;            }        }        return null;    }    public String getValue() {        return value;    }    public void setValue(String value) {        this.value = value;    }    public int getIndex() {        return index;    }    public void setIndex(int index) {        this.index = index;    }}

2.编写自定义处理类，继承Converter接口

public class StringToGoodsConverter implements Converter
     
       {    @Override    public GoodsPromoteEnum convert(String value) {        if (StringUtils.isBlank(value)) {          return null;        }        return GoodsPromoteEnum.get(value);    }}
     

3.在springmvc配置文件里配置