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5、jQuery的Ajax与Java通过GET方式交互

16-05-07 来源：[db:作者]

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1、jQuery.get( url, [data], [callback] )：使用GET方式来进行异步请求

1.1 参数：

url(String) : 发送请求的URL地址.

data(Map) : (可选) 要发送给服务器的数据，以 Key/value 的键值对形式表示，会做为jQueryString附加到请求URL中。

callback(Function) : (可选) 载入成功时回调函数(只有当Response的返回状态是success才是调用该方法)。

请求成功时可调用回调函数。如果需要在出错时执行函数，请使用 $.ajax。

1.2 jQuery的Ajax与Java通过GET方式交互

1.2.1 html代码

<body>
	<div id="main">
		<button id="myBut">Ajax获取数据</button>
		<div id="container"></div>
	</div>
</body>

1.2.2 style代码

<style type="text/css">
#main {
	margin: 0 auto;
	width: 400px;
}
#container {
	width: 400px;
	height: 300px;
	border: 1px dashed #666;
	text-align: center;
	line-height: 300px;
}
</style>

1.2.3 Javascript代码

<script type="text/javascript" src="js/jquery-1.8.3.js"></script>
<script type="text/javascript">
	$(function() {
		$('#myBut').click(function() {
			$.get("JqueryAjaxServlet", {
				age : 18,
				name : "zhang"
			}, function(data, textStatus) {
				var container = $('#container');
				var resultData = $.parseJSON(data);
				var age = resultData.age;
				var name = resultData.name;
				container.html("name:" + name + "," + "age:" + age);
			});
		});
	});
</script>

1.2.4 JqueryAjaxServlet.java代码

public class JqueryAjaxServlet extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String age = request.getParameter("age");
		String name = request.getParameter("name");

		String personJSON = "{\"name" + "\":\"" + name + "\"," + "\"age"
				+ "\":" + age + "}";
		System.out.println(personJSON);
		response.getWriter().write(personJSON);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doGet(request, response);

	}

}

1.2.5 web.xml代码

<servlet>
    <servlet-name>JqueryAjaxServlet</servlet-name>
    <servlet-class>com.jquery.ajax.com.JqueryAjaxServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>JqueryAjaxServlet</servlet-name>
    <url-pattern>/JqueryAjaxServlet</url-pattern>
  </servlet-mapping>	
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>

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