日期:2014-05-16  浏览次数:20613 次

请各位老师给看看,做的是jQuery对ajax 的支持
问题是这样的:我按照课件上面的例子,对项目进行了部署,但是在页面上点击的时候一点反应都没有
下面是代码:
Java code

public class Car {
    
    private String name;
    private double price;
    private String desc;
    
    public Car(String name,double price,String desc){
        super();
        this.name = name;
        this.price = price;
        this.desc = desc;
    }
    
    public Car(){
        super();
    }
    
    public String getDesc(){
        return desc;
    }
    public void setDesc(String desc){
        this.desc = desc;
    }
    public String getName(){
        return name;
    }
    public void setName(String name){
        this.name = name;
    }
    public double getPrice(){
        return price;
    }
    public void setPrice(double price){
        this.price = price;
    }
}

这是类car

Java code

public class ActionServlet  extends HttpServlet {
    
    public void service(HttpServletRequest request,HttpServletResponse response)
        throws ServletException,IOException{
        String uri = request.getRequestURI();
        String path = uri.substring(uri.lastIndexOf("/"), uri.lastIndexOf("."));
        if(path.equals("/crinfo")){
            response.setContentType("text/html;charset=utf-8");
            PrintWriter out = response.getWriter();
            String name = request.getParameter("name");
            System.out.println(name);
            if(name.equals("bmw520")){
                Car car = new Car("bmw520",50,"还行");
                JSONObject obj = JSONObject.fromObject(car);
                out.println(obj.toString());
            }else if(name.equals("qqme")){
                Car car = new Car("qqme",5,"真不错");
                JSONObject obj = JSONObject.fromObject(car);
                out.println(obj.toString());
            }else{
                Car car = new Car("maiten",18,"高性能商务车");
                JSONObject obj = JSONObject.fromObject(car);
                out.println(obj.toString());
            }
            out.close();
        }
    }
}

这是action里面的内容

HTML code

<head>
    <title>Insert title here</title>
    <style>
        #d1{
            width:300px;
            height:80px;
            background-color:#fff8dc;
            display:none;
        }
    </style>
    <script type="text/javascript" src="js/jquery-1.4.2.js"></script>
    <script type="text/javascript">       
        $(function(){
            $('select').change(function(){
                //当change函数执行时将之前显示的东西清空
                $('#d1').remove();
                    
                //ajax对象
                $.ajax({
                    'url':            'carinfo.do',
                    'type':            'post',
                    'data':            {'name':$('#s1').val()},
                    'dataType':        'json',
                    'success':
                        function(data,textStatus){
                            // data已经被转换成了js对象
                            // 1.在id为s1的<select>元素后增加一个<div>
                            $('#s1').after("<div id='d1'></div>");
                            // 2.该<div>元素的内容赋为“价格”和“描述”
                            $('#d1').html('报价:' +data.price+ '<br />' +'描述:'+ data.desc);
                            //设置该<div>动画效果
                            $('#d1').slideDown('slow');