GWT优势发挥：简单代码打造优雅用户体验利器

不知不觉GWT就要上2.0了。只从去年做完公司网站：http://www.hotye.com/，几乎就没在用过了。最近又在一个web项目用到了，所以又突然觉得特亲切。
下面就抛砖引玉，用一个小的示例来show一些我们用GWT的理由
PS：从项目 copy的一段代码。本来可以做成二级联动菜单的，结果觉得数据不多有点浪费。

public enum VehicleTpye {

	大型汽车("01","大型汽车"),小型汽车("02","小型汽车"),使馆汽车("03","使馆汽车"),
	领馆汽车("04","领馆汽车"),境外汽车("05","境外汽车"),外籍汽车("06","外籍汽车"),
	两三轮摩托车("07","两/三轮摩托车"),轻便摩托车("08","轻便摩托车"),使馆摩托车("09","使馆摩托车"),
	领馆摩托车("10","领馆摩托车"),境外摩托车("11","境外摩托车"),外籍摩托车("12","外籍摩托车"),
	农用运输车("13","农用运输车"),拖拉机("14","拖拉机"),挂车("15","挂车"),
	教练汽车("16","教练汽车"),教练摩托车("17","教练摩托车"),试验汽车("18","试验汽车"),
	试验摩托车("19","试验摩托车"),临时入境汽车("20","临时入境汽车"),临时入境摩托车("21","临时入境摩托车"),
	临时行驶车("22","临时行驶车"),警用汽车("23","警用汽车"),警用摩托("24","警用摩托");
	
	private final String code;
	private final String name;
	
	public static String[] car={"01","02","03","04","05","06","16","18","20","23"};
	public static String[] Moto={"07","08","09","10","11","12","17","19","21","24"};
	public static String[] other={"13","14","15","22"};
	
	private VehicleTpye(String code, String name) {
		this.name = name;
		this.code = code;
	}

	public String getCode() {
		return code;
	}

	public String getName() {
		return name;
	}
	
	public static String code2Name(String code){
		for (VehicleTpye vehicleTpye : VehicleTpye.values()) {
			if(vehicleTpye.code.equals(code))
				return vehicleTpye.getName();
		}
		return "";
	}
	
	public static void main(String[] args) {
		System.out.println(code2Name("02"));
	}
}

public class VehicleTypeListBox extends ListBox {

	public VehicleTypeListBox() {
		addItem("请选择...", "");
		addItem("汽车类", "");
		for (String string : VehicleTpye.car) {
			addItem("  |-"+VehicleTpye.code2Name(string), string);
		}
		addItem("摩托类", "");
		for (String string : VehicleTpye.Moto) {
			addItem("  |-"+VehicleTpye.code2Name(string), string);
		}
		addItem("其他类", "");
		for (String string : VehicleTpye.other) {
			addItem("  |-"+VehicleTpye.code2Name(string), string);
		}
	}

效果：