java enum类的使用

枚举类是我一直没有疏忽掉的东西，做了一个demo发现还是比较容易的。

例子：

PayType.java

/*
 *Project Name: Woqi
 * File Name: PayType.java
 * Class Name: PayType
 *
 * Copyright 2014 Hengtian Software Inc
 *
 * Licensed under the Hengtiansoft
 *
 * http://www.hengtiansoft.com
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


/**
 * Description:
 * 
 * @author bindizhang
 * 
 */
public enum PayType {
	/** 资信支付 **/
	credit_pay("资信支付", 0),
	/** 网银 **/
	E_bank_wap("银联支付", 1),
	/** 线下支付 **/
	under_pay("线下支付", 2),
	/** 网银对公支付 **/
	E_bank_pub("网银银联对公支付", 3),
	/** ERP下单 **/
	ERP_order("ERP下单", 4),
	/** ERP充值 **/
	ERP_add_credit("ERP充值", 5),
	/** 支付宝 **/
	alipay("支付宝", 6),
	/** 财付通 **/
	tenpay("财付通", 7),
	/** 线下出账 **/
	under_clear("线下出账", 8),
	/*** 备用金 - 退款金额 **/
	store_pay("退款金额", 9),
	/** 在增加资信时，审核状态为待审核的时候，支付状态为待审核 **/
	verify("待审核", 10);
	private final String typeDesc;
	private final Integer typePosition;

	private PayType(String typeDesc, Integer typePosition) {
		this.typeDesc = typeDesc;
		this.typePosition = typePosition;
	}

	/**
	 * @return the typeDesc
	 */
	public String getTypeDesc() {
		return typeDesc;
	}

	/**
	 * @return the typePosition
	 */
	public Integer getTypePosition() {
		return typePosition;
	}

	public static PayType getPayTypeFromPosition(Integer position) {
		PayType payType;
		switch (position) {
		case 0:
			payType = credit_pay;
			break;
		case 1:
			payType = E_bank_wap;
			break;
		case 2:
			payType = under_pay;
			break;
		case 3:
			payType = E_bank_pub;
			break;
		default:
			payType = null;
		}
		return payType;
	}

}

测试类

public class HelloEnum {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println("helloworld");
		System.out.println(PayType.alipay.getTypeDesc());
		System.out.println(PayType.getPayTypeFromPosition(2).getTypeDesc());
		System.out.println(PayType.getPayTypeFromPosition(3).getTypePosition());
	}

}

测试结果

helloworld
支付宝
线下支付
3