自定义标签之带文本自动完成的下拉框

1、使用说明，如在添加人员页面中使用,调用的页面必须要引入jquery库及标签<%@ taglib uri="/web-tags" prefix="tc" %>

<th>职称：</th>
          <td>
          <tc:selectTextTag defaultValue="1010" width="220px" name="orgUser.title" dispayProperty="titleName" id="orgTitleId" optionValueProperty="titleId"  objList="${orgTitleList}"/>

</td>

属性说明：defaultValue：是下拉框默认的值，可以是el表达式，对应select-->option被选中的value值 （可选）

              width：下拉框的宽度，默认为100%px  （可选）

              name : 对应下拉框select-->name的值   （必填）

              objList: 要遍历的List 集合                   （必填）

                id：对应select的id                             （必填）

              dispayProperty: 要取的javabean的属性 ,对应<option>dispayProperty</option>  （必填）

              optionValueProperty：要取的javabean的属性，对应select-->option的value值对应的属性值， （必填）

             对应<option value="optionValueProperty"></option>

显示的效果图：

 2、标签处理类：

public class SelectTextTag extends TagSupport{

	private static final long serialVersionUID = 1L;
	private static Configuration freemarkerCfg = FreemarkerUtil.getConfiguration();
	private String id="selectId";
	private String name="selectTextName";
	private String defaultValue;
	private String optionValueProperty;
	private String dispayProperty;
	private List<Object> objList;
	private String preStr="selectText_";
	private String width="100%px";
	public int doStartTag() throws JspException {
		JspWriter out=super.pageContext.getOut();
		String basePath=(String)pageContext.getRequest().getAttribute("basePath");
		Writer writer = new StringWriter();
		try {
			Template template = freemarkerCfg.getTemplate("selectText.ftl", "UTF-8");
			SimpleHash root = new SimpleHash(ObjectWrapper.BEANS_WRAPPER); 
			//给模板动态填充数据
			root.put("path",basePath);
			root.put("selectName",name);
			root.put("id", id);
			root.put("selectWidth", width);
			root.put("seelctTextName", preStr+createRandomId(4)+"_"+createRandomId(4));
			//处理模版      
			StringBuffer optionList = new StringBuffer();
			StringBuffer optionDatas=new StringBuffer();
			processMethod(dispayProperty,optionValueProperty);
			 try {
				 for(Object object : objList){
					String selected=" ";
					Method dispayMethod=object.getClass().getMethod(dispayProperty);
					Method optionMethod=object.getClass().getMethod(optionValueProperty);
					Object displayValue=(Object)dispayMethod.invoke(object);
					Object optionValue=(Long)optionMethod.invoke(object);
					if(defaultValue!=null&&(defaultValue.equals(optionValue.toString()))){
						selected=" selected";
					}
					optionList.append("<option value=\""+optionValue.toString().trim()+"\""+selected+">")
					.append(displayValue.toString()).append("</option>");
					optionDatas.append(displayValue.toString()).append(",");
				 }
				 if(optionDatas.length()>1){
					 optionDatas.deleteCharAt(optionDatas.length()-1);
				 }
				root.put("optionDatas",optionDatas.toString());
				root.put("optionList",optionList.toString());
				template.process(root, writer);		
				} catch (Exception e) {
					throw new JspException("自定义带文本框的下拉框处理失败,请检查配置的属性是否存在!");	
				
				}    
			writer.flush();    
			String content = writer.toString();
			writer.close(); 
			out.write(content);
		} catch (IOException e) {
			e.printStackTrace();
		}
		return super.doStartTag();
	}
	private void processMethod(String dispayNameMethod,String optionValueMethod){
		String dispayNameHeadLetter=dispayNameMethod.substring(0,1).toUpperCase();
		String dispayNameLastLetter=dispayNameMethod.substring(1,dispayNameMethod.length());
		this.dispayProperty="get"+dispayNameHeadLetter+dispayNameLastLetter;
		String optionValueHeadLetter=optionValueMethod.substring(0,1).toUpperCase();
		String optionValueLastLetter=optionValueMethod.substring(1,optionValueMethod.length());
		this.optionValueProperty="get"+optionValueHeadLetter+optionValueLastLetter;
	}
	private static String createRandomId(int x){
        Map pool = new HashMap();   
        Random random = new Random();   
        StringBuffer result = new StringBuffer();   
        for (int i = 0; i < x; i++) {   
            int temp = random.nextInt(9);   
            if(pool.containsValue(temp)){   
                x++;       
            }else{   
	            pool.put(i, temp);   
	            result.append(temp);   
            }   
        }       
        return result.toString();   
	}
//....省略get&set方法
}

 3、selectText.ftl模板

<script type="text/javascript" src="${path}js/autocomplete/jquery.autocomplete.js"></script>
<script type="text/javascript" src="${path}js/selectText.js"></script>
<link rel="stylesheet" href="${path}js/autocomplete/jquery.autocomplete.css" type="text/css" />
 <select name="${selectName}" id="${id}" style="width:${selectWidth}">
    ${optionList}
 </select> 
<SCRIPT LANGUAGE="JavaScript">
  <!--
$(function(){
	 var ${seelctTextName}=new combox("${seelctTextName}","${id}","输入的值不存在!");
 	 ${seelctTextName}.init(${seelctTextName});
 	 var data = "${optionDatas}".split(",");
	$("#${seelctTextName}").autocomplete(data); 
	//改变时更新select框的值
	$("#${seelctTextName}").result(function(event, data, formatted) {
		${seelctTextName}.find();
	});
});
  //-->
</SCRIPT>