c:forEach實現動態select標簽

<c:forEach>標簽是更加通用的標簽，因為它迭代一個集合中的對象。

<c:forTokens>標簽通過指定分隔符將字符串分隔為一個數組然后迭代它們。

• JavaBean

  public class SelectData {
  	private String	key;	// 鍵
  	private String	value;	// 值
  							
  	public SelectData(String key, String value) {
  		super();
  		this.key = key;
  		this.value = value;
  	}
  	
  	public String getKey() {
  		return key;
  	}
  	
  	public void setKey(String key) {
  		this.key = key;
  	}
  	
  	public String getValue() {
  		return value;
  	}
  	
  	public void setValue(String value) {
  		this.value = value;
  	}
  	
  }
  

• Servlet

  public class ServletDemo3 extends HttpServlet {
  
      @Override
      protected void doGet(HttpServletRequest req, HttpServletResponse resp)
              throws ServletException, IOException {
        List<SelectData> list = new ArrayList<SelectData>();
  		proList.add(new SelectData("1", "北京"));
  		proList.add(new SelectData("2", "上海"));
  		proList.add(new SelectData("3", "廣州"));
  		proList.add(new SelectData("4", "深圳"));
  		proList.add(new SelectData("5", "河北"));
  		proList.add(new SelectData("6", "河南"));
  		proList.add(new SelectData("7", "山西"));
  		proList.add(new SelectData("8", "山東"));
  		proList.add(new SelectData("9", "江蘇"));
  		proList.add(new SelectData("10", "浙江"));
          req.setAttribute("proList",proList);
      }
  
      @Override
      protected void doPost(HttpServletRequest req, HttpServletResponse resp)
              throws ServletException, IOException {
          doGet(req,resp);
      }
  
  }
  

• 前端核心代碼

<select name="sel_Province">
    <c:forEach items="${proList}" var="user" varStatus="status">
            <option value="${user.key}">${list.value}</option>
    </c:forEach>
</select>