jQuery 在jsp中创建一个json对象并将其与JQuery一起使用
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Creating a json object in jsp and using it with JQuery
提问by Decrypter
I've created a JSP application, which gets results based on a user search (using lucene). I store the results in a Bean.
我创建了一个 JSP 应用程序,它根据用户搜索(使用 lucene)获取结果。我将结果存储在 Bean 中。
I'm also using Jquery Ajax to display the results.
我也在使用 Jquery Ajax 来显示结果。
$.ajax({
url : "search.jsp",
data : "search=test",
success : function(html) {
("#search_results").hide().html(html).fadeIn(1500);
}
});
search.jsp
搜索.jsp
for (int i = 0; i < size; i++) {
out.println(searchResult.get(i).getHTML());
}
This is working fine, however I want to change it so it returns a JSON object to JQuery and then let JQuery parse the objects and display the results
这工作正常,但是我想更改它,以便它向 JQuery 返回一个 JSON 对象,然后让 JQuery 解析对象并显示结果
I am not sure how to do this as I'm new to JSON objects and JSP. I could possibly do something like
我不知道如何做到这一点,因为我是 JSON 对象和 JSP 的新手。我可能会做类似的事情
JSONObject json = new JSONObject();
json.put("title", "TITLE_TEST");
json.put("link", "LINK_TEST");
but I dont know how to return json
to jquery then let jquery parse the objects
但我不知道如何返回json
jquery 然后让 jquery 解析对象
Any help is appreciated :)
任何帮助表示赞赏:)
回答by Darin Dimitrov
Here's an exampleyou may take a look at. Basically your JSP page might look like this:
这是一个您可以查看的示例。基本上您的 JSP 页面可能如下所示:
<%@page contentType="text/html; charset=UTF-8"%>
<%@page import="org.json.simple.JSONObject"%>
<%
JSONObject json = new JSONObject();
json.put("title", "TITLE_TEST");
json.put("link", "LINK_TEST");
out.print(json);
out.flush();
%>
and on the client:
在客户端:
$.ajax({
url : 'search.jsp',
data : { search: 'test' },
dataType: 'json',
success : function(json) {
alert(json.title);
}
});
And here are even more examples.
这里还有更多的例子。
回答by Jashwant
Ultimately its being trasnferred over http. So, creating a json object wont do much help.
最终它是通过 http 传输的。因此,创建一个 json 对象不会有太大帮助。
I am not a java expert but you can create a simple string which matches with json structure and then parse it on client side.
我不是 Java 专家,但您可以创建一个与 json 结构匹配的简单字符串,然后在客户端解析它。
Like
喜欢
string s = { "title": "testTitle", "link" : "testLink"}
out.println(s)
This will do the trick.
这将解决问题。
Edit: by seeing Darin's answer,
编辑:通过看到达林的回答,
Include this on you java code,
将此包含在您的 Java 代码中,
<%@page contentType="application/json; charset=UTF-8"%>
回答by nightmareTomek
This worked for me:
这对我有用:
%>
String json = "{ \"title\": \"testTitle\", \"link\" : \"testLink\"}";
response.getWriter().write(json);
response.getWriter().flush();
response.getWriter().close();
<%
I used it to feed an easyui-datagrid. response.getWriter().write(json)
worked, but out.println(json)
did not though he didn't throw any exceptions. Also the inner quotes must be double as well, so it becomes necessary to mask them with `\".
我用它来提供一个easyui-datagrid。response.getWriter().write(json)
工作,但out.println(json)
没有,尽管他没有抛出任何异常。此外,内部引号也必须是双引号,因此有必要用“\”来掩盖它们。
回答by Varun Ved
Pretty simple approach would be to use taglib - json something like this :
非常简单的方法是使用 taglib-json 是这样的:
<%@ taglib prefix="json" uri="http://www.atg.com/taglibs/json" %>
Then you can use json tags to create it out of list:
然后你可以使用 json 标签从列表中创建它:
<json:array items="${someObject.someList}" var="oneRow">
<json:object>
<json:property name="username" value="${oneRow.username}"/>
<json:property name="password" value="${oneRow.password}"/>
<json:property name="email" value="${oneRow.email}"/>
</json:object>
Above jsp when executes will O/P following :
以上jsp执行时会O/P如下:
[
{"username":"varun","password":"*****","email":"johndoe@sssdotcom"},
{"username":"ved","password":"*****","email":"johndoe1@sssdotcom"},
{"username":"von","password":"*****","email":"johndoe2@sssdotcom"}
]
Thats all folks!
这就是所有人!