详解SpringMVC 自动封装枚举类的方法

springMVC默认无法自动封装枚举类，解决方法如下：

枚举类

public enum GoodsPromoteEnum {    fine("精品",0),    limit("限时购",1),     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;  }}