枚举的使用

//--------------------------------------------实体-------------------------------------  

private CanCi name;
    @Enumerated(EnumType.STRING)
    @Column(name = "name",nullable = false, length = 10)
    public CanCi getName() {
        return name;
    }
    public void setName(CanCi name) {
        this.name = name;
    }
    public enum CanCi
    {
    QT("全天"){},
        ZC("早餐"){},
        WC("午餐") {},
        W_C("晚餐") {};
        
        private String value;

        private CanCi(String value)
        {
            this.value = value;
        }

        public String getValue()
        {
            return value;
        }

    }

//--------------------------------------------controller-------------------------------------  
 model.addAttribute("types", MealTime.CanCi.values());

//--------------------------------------------jsp------------------------------------- 
<select style="width: 80%;" id="coursesTypeId" name="name">
    <c:forEach items="${types}" var="type">
        <option value="${type}" <c:if test="${pageModel.name eq type}">selected="selected"</c:if> >${type.value}</option>
    </c:forEach>
</select>

 

 

 

 -----------------------------------jsp页面取固定的key和value---------------

 

 

//----------------------实体---------------

private ProductPayWay payType;

 

@Enumerated(EnumType.STRING)
@Column(name = "pay_type",nullable = false, length = 10)
public ProductPayWay getPayType() {
return payType;
}

public enum ProductPayWay
{
HTZ("后台支付"){},
WX("微信"){},
ZFB("支付宝"){},
CK("餐卡"){};

private String value;

private ProductPayWay(String value)
{
this.value = value;
}

public String getValue()
{
return value;
}

}

//---------------controller------------------

 model.addAttribute("productPayWay",ProductPayWay.values());

//-------------jsp----------------------

${productPayWay[0]}     --得到HTZ       ${productPayWay[0].value }    --得到后台支

${productPayWay[1]}     --得到WX      ${productPayWay[1].value }    --得到微信

${productPayWay[2]}     --得到ZFB      ${productPayWay[2].value }    --得到支付宝

${productPayWay[3]}     --得到CK       ${productPayWay[2].value }    --得到餐卡

 

 

 

 

----------------------------------controller页面取固定的key和value---------------

//----------------------实体---------------

private ProductPayWay payType;

 

@Enumerated(EnumType.STRING)
@Column(name = "pay_type",nullable = false, length = 10)
public ProductPayWay getPayType() {
return payType;
}

public enum ProductPayWay
{
HTZ("后台支付"){},
WX("微信"){},
ZFB("支付宝"){},
CK("餐卡"){};

private String value;

private ProductPayWay(String value)
{
this.value = value;
}

public String getValue()
{
return value;
}

}

取key:

  Enum.valueOf(ProductPayWay.class, ProductPayWay.WX.toString())

  ProductPayWay.WX.name()

取value:

  ProductPayWay.values()[1].getValue()

 

 

获取枚举的value:

mealTime.setTypeStr(MealType.valueOf(mealTime.getMealType().toString()).getValue());

获取枚举的key:

 mealTime.setMealType(MealType.valueOf(mealTime.getTypeStr())); 

 

posted @ 2017-02-27 16:07  baby孔祥超  阅读(190)  评论(0编辑  收藏  举报