如何从rest服务发送json对象,以便在客户端javascript上进行解析
我只想将一个JSON对象(使用ajax)从我的服务器返回到客户端,这样我就可以读取客户端的数据了如何从rest服务发送json对象,以便在客户端javascript上进行解析,java,jquery,ajax,json,jsp,Java,Jquery,Ajax,Json,Jsp,我只想将一个JSON对象(使用ajax)从我的服务器返回到客户端,这样我就可以读取客户端的数据了 @GET @Produces("application/json") @Consumes("application/json") @Path("/getStatus/") public void getStatus( @Context HttpServletRequest request, @Context HttpServletResponse re
@GET
@Produces("application/json")
@Consumes("application/json")
@Path("/getStatus/")
public void getStatus(
@Context HttpServletRequest request,
@Context HttpServletResponse response) throws ServletException,
IOException
{
//create the JSON Object to pass to the client
JSONObject object=new JSONObject();
response.setContentType("text/javascript");
try
{
object.put("name", nameDataFromClass);
object.put("status",someData);
}
catch(Exception e)
{
throw new ServletException("JSON Hosed up");
}
String json = object.toString();
response.getOutputStream().println(json);
}
这将是JSP的客户端,我想在页面上提取数据
<html>
<head>
<!-- Calls in jQuery file -->
<script src="jquery.js"></script>
<title>JQuery Test</title>
<script>
$.getJSON("http://localhost:8080/scout/rest/admin/mamba/getStatus",
function(json)
{
alert("Server naame: " + json.name);
});
</script>
</head>
<body>
</body>
</html>
JQuery测试
$.getJSON(“http://localhost:8080/scout/rest/admin/mamba/getStatus",
函数(json)
{
警报(“服务器名称:+json.name”);
});
Jackson库应该负责将json对象编组到您的对象,反之亦然。只需创建一个简单的POJO,如下所示:
public class Mystatus{
public String name;
public String status;
public Mystatus(){} // a default empty constructor is needed
public Mystatus(String name,String status){
this.name=name;
this.status=status;
}
}
然后从RESTful Web服务返回此对象:
@GET
@Produces("application/json")
@Consumes("application/json")
@Path("/getStatus/")
public Mystatus getStatus(
@Context HttpServletRequest request,
@Context HttpServletResponse response)
{
response.setContentType("text/javascript");
return new Mystatus("Hello","World");
}
@GET
@生成(“应用程序/json”)
@使用(“应用程序/json”)
@路径(“/状态”)
//服务器:8080/server/rest/status
公共字符串getStatus(
@上下文HttpServletRequest请求,
@上下文HttpServletResponse)引发异常
{
//创建一个字符串来保存JSON
字符串json;
集合svr=SomeHashMap.getStuff().values();
JSONArray jArray=新的JSONArray();
用于(服务器i:svr)
{
JSONObject m=新的JSONObject();
ServerStatus status=i.getStatus();
m、 put(“id”,i.getId());
m、 put(“name”,i.getName());
m、 put(“status”,status.getState());
加上(m);
}
json=jArray.toString();
}
setContentType(“text/javascript”);
response.getOutputStream().print(json);
response.flushBuffer();
返回null;
}
index.jsp
<head>
<script src="jquery-1.6.js"></script>
<!--AJAX FOR STATUS PAGE REFRESH -->
<script type="text/javascript">
//when page is ready do the following
$(document).ready(function()
{
// Disable caching of AJAX responses
$.ajaxSetup ({cache: false});
//set interval of refresh
setInterval(doAjaxStuff, 1000);
//function to call to fire off ajax
function doAjaxStuff()
{
$.ajax
({
url: "status", // <-- this refers to the Controller function above called "status()"
dataType: 'json',
success: function(json)
{
//traverse throught each element in the incoming JSON object
for(var i = 0; i< json.length; i++)
{
if(json[i].status == "ACTIVE")
{
$("#Status"+json[i].id).html("Running");
}
}
}
});
}
});
</script>
</head>
//当页面准备就绪时,请执行以下操作
$(文档).ready(函数()
{
//禁用AJAX响应的缓存
$.ajaxSetup({cache:false});
//设置刷新间隔
设置间隔(DOA,1000);
//函数调用以触发ajax
函数doAjaxStuff()
{
$.ajax
({
url:“状态”,//那么什么对您不起作用呢?客户端没有收到任何数据。我的restful java是否应该返回?是否缺少一些jquerry/ajax片段?请求是否确实到达java层?没有-只是检查了。是否需要为ajax部分实现更多内容?好的,请求正在返回。尝试写入并刷新响应。不确定为什么在其中包含“回调”位。顺便说一句,这可能会使json无效。
<head>
<script src="jquery-1.6.js"></script>
<!--AJAX FOR STATUS PAGE REFRESH -->
<script type="text/javascript">
//when page is ready do the following
$(document).ready(function()
{
// Disable caching of AJAX responses
$.ajaxSetup ({cache: false});
//set interval of refresh
setInterval(doAjaxStuff, 1000);
//function to call to fire off ajax
function doAjaxStuff()
{
$.ajax
({
url: "status", // <-- this refers to the Controller function above called "status()"
dataType: 'json',
success: function(json)
{
//traverse throught each element in the incoming JSON object
for(var i = 0; i< json.length; i++)
{
if(json[i].status == "ACTIVE")
{
$("#Status"+json[i].id).html("Running");
}
}
}
});
}
});
</script>
</head>