使用jquery将JSON数组从jsp传递到javascript [英] Passing JSON array from jsp to javascript using jquery
问题描述
我已经搜索了两天，并尝试了我认为可能的所有事情. 我使用GSON创建一个JSON数组.当我在通过jquery将其发送到Javascript之前打印出json字符串时，它看起来像这样:
I've searched for two days now and tried every possible thing I think. I use GSON to create a JSON array. When I print out my json string before sending it to Javascript via jquery it looks like this:
[{"var1":"hi","var2":"this","var3":"is"}]
对我很好.我尝试通过以下2种方式发送给js:
Looks good to me. I've tried sending to js the following 2 ways:
String json = gson.toJson(googData, listType);
response.setContentType("application/json");
response.setCharacterEncoding("UTF-8");
response.getWriter().write(json);
和
String json = gson.toJson(googData, listType);
<%= json %>
这是我的js代码:
$.getJSON("testgoogle.jsp", function(json) {
$.each (json, function(k, v) {
alert(v.val1);
});
});
很简单吧?我可以将其更改为$ .get并查看字符串.如果我提醒(k)，它只会提醒0次.我怀疑我的json字符串传递了一些空格.当我警告从jsp返回的任何内容时，它在警告框中的显示要比说alert("hi")低.你知道在哪里！在警报框中，"hi"在中间的位置如何！ img.好吧，当我从jsp发送<％="hi"％>时，它在！之下.我一直将<％="hi"％>一直移到顶部，所以我的jsp看起来像:
Pretty simple right? I can change it to $.get and see the string. If I alert(k) it only alerts 0 one time. I have a suspicion that i'm passing some white space with my json string. When I alert anything returned from the jsp's it appears lower in the alert box than say an alert("hi"). You know where the ! is in the alert box and how "hi" is right in the middle of the ! img. Well when I have <%= "hi" %> sent from jsp it is below the !. I moved <%= "hi" %> all the way to the top so my jsp looked like:
<%@page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%= "hi" %>
如您所见，我正在抓稻草.这在！的底部返回了"hi".我将jsp中的行越多，将"hi"移到警报框中的位置就越低.另外，有些奇怪.如果我将此保留在我的jsp顶部:
As you can see, I'm grasping at straws. This returned "hi" at the bottom of the !. The more lines in my jsp I move the "hi" down the lower it is in my alert box. Also, something weird. If I leave this at the top of my jsp:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
这实际上会在我的警报中打印出来.
That will actually print out in my alert.
如果您需要更多信息，请告诉我.
Please let me know if you need more info.
解决方案: 当密钥为var1时，我试图调用val1.哇！我永远不会把所有这些小时都弄回来；)正确的代码与上面的相同，只是val1应该是var1.此外，我尝试使用eval(json)进行操作，但仍然可以参考.感谢您尝试帮助所有人！
Solution: I was trying to call val1 when the key was var1. Wow! I will never get all those hours back ;) The correct code is identical to the above except val1 should be var1. Also, I tried it with eval(json) and it still worked FYI. Thanks for trying to help everyone!
推荐答案
成功回调传递给返回的数据，通常是 由JSON结构定义并解析的JavaScript对象或数组 使用$ .parseJSON()方法.它还传递了的文本状态 响应.
The success callback is passed the returned data, which is typically a JavaScript object or array as defined by the JSON structure and parsed using the $.parseJSON() method. It is also passed the text status of the response.
您不必自己解析"字符串，因为jQuery已经对其进行了解析
You don't have to "parse" the string yourself as it is already parsed by jQuery
$.getJSON("testgoogle.jsp", function(json) {
$.each (json, function(k, v) {
alert(v.val1);
});
});
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