如何在jsp中显示Json对象 [英] How to display Json object in jsp
问题描述
我是jsp的新手。我有一个 JSON 编码
{eventDetails：[{的startDate ：1387175589253， eventJSON ：{\ userIp\：\ \ organizationUid\ *** *** *** ** \。：\ 4261-5404a609bd14\，\ userAgent\：\ 的Restlet-Framework\ / 2.1m3\，\ currentSessionToken\：\ 9f3ee5b076-27dbead458ca\，\\ \\ endTime\：1312，\ apiKey\：\ b6bd9-30849cf17727\，\ startTime\：13853，\ sessionToken\：空，\ eventId\ ：\ 4731d1-adb6-10faaa3ee269\ \ userUid\：空，\ userId\：1，\ context\：\ \ / v2 \ / account \ / loginas\ / anonymous \，\eventName\：\user-loginAs\
我需要显示eventJSON对象作为原始数据： {\ userIp\：\ 204.236.177.80\，\ organizationUid\：\4261739e-CCAE-11e1的-ADFB-5404a609 bd14\，\ userAgent\：\ 的Restlet-Framework\ / 2.1m3\，\ currentSessionToken\：\ 9f3ee54a-4f5f-b076-27d8ca\， \ endTime\：1387175589312，\ apiKey\：\ b6b8-4ad5-96d9-3084927\，\ startTime\：1387175589253，\ sessionToken\：空，\ eventId\：\ 478e8-4ed1-adb6-10faaa3ee269\，\ userUid\：空，\ userId\：11878，\context\ ：\\ / v2 \ / act \ / lonas \ / anonymous \，\eventName\：\user-loginAs\}
如何使用gson显示eventJSON并使用 c：out 进行打印。
JSP页面 = datalogList - $ {gC.index} >
< td id =eventName - $ {gC.index}>
< c：out value =$ {datalog.eventName}/>
< / td>
< td id =startTime - $ {gC.index}>
< c：out value =$ {datalog.startTime}/>
< / td>
< td id =endTime - $ {gC.index}>
< c：out value =$ {datalog.endTime}/>
< / td>
< td id =apiKey - $ {gC.index}>< / a>
< / tr>
Java
Datalogging [] logevents =（Datalogging []）gson.fromJson（eventValueList.toString（），Datalogging []。class）;
感谢您阅读。
-
您可以像下面这样使用JavaScript变量：
var persons = [
{name：John Doe，address：Main Street 1}，
{name：Jane Doe，address：Baker Street 1}，
{name：Jack Doe，address：Church Street 1}
];
$ b $
<！DOCTYPE html>>我建议使用jQuery创建一个HTML表格。
< html lang =en>
< head>
< title>测试< /标题>
< script src =http://code.jquery.com/jquery-latest.min.js>< / script>
< script>
var persons = [
{name：John Doe，address：Main Street 1}，
{name：Jane Doe，address ：Baker Street 1}，
{name：Jack Doe，address：Church Street 1}
];
$（document）.ready（function（）{
var table = $（'< table />'）。appendTo（$（'＃somediv'））;
$ （person）.each（function（i，person）{
$（'< tr />'）。appendTo（table）
.append（$（'< td />' ）.text（person.name））
.append（$（'< td />'）.text（person.address））;
}）;
}）;
< / script>
< / head>
< body>
< div id =somediv>< / div>
< / body>
< / html>
2。你可以像Java String这样的变量：
String jsonPersons =[
+{\ name \：\John Doe \，\address \：\Main Street 1 \}，
+{\name \： \\Jane Doe \，\address \：\Baker Street 1 \}，
+{\name \：\Jack Doe \\ \\地址\\：\Church Street 1 \}
+];
然后我建议使用JSON解析器来获取List，例如Google Gson： / p>
列表< Person> fromJson（jsonPersons，new TypeToken< List< Person>>（）{} .getType（））;
其中Person类看起来像这样：
public class Person {
private String name;
私有字符串地址;
//添加或生成getters / setters。
}
让servlet将它放入请求范围并转发到JSP以进行显示所以：
request.setAttribute（persons，persons）;
request.getRequestDispatcher（/ WEB-INF / persons.jsp）。forward（request，response）;
在JSP中，使用JSTL遍历它：
<％@ taglib uri =http://java.sun.com/jsp/jstl/coreprefix =c％>
...
< table>
< c：forEach items =$ {persons}var =person>
< tr>
< td> $ {person.name}< / td>
< td> $ {person.address}< / td>
< / tr>
< / c：forEach>
< / table>
<3>与2）相同，您将它作为Java变量，但您希望获得它由JSP中的Ajax实现。然后创建一个Servlet类，它在doGet（）方法中执行以下操作：
response.setCharacterEncoding（UTF-8）;
response.setContentType（application / json）;
response.getWriter（）。write（jsonPersons）;
用jQuery Ajax调用它，它的回调函数与1）相同。
$（document）.ready（function（）{
var table = $（'< table />'）。 appendTo（$（'＃somediv'））;
$ .getJSON（'url / to / servlet'，function（persons）{
persons.each（function（i，person）{
$（'< tr />'）。appendTo（table）
.append（$（'< td />'）.text（person.name））
.append $（'< td />'）。text（person.address））;
}）;
}）;
}）;
I'm newbie to jsp. I have a JSON coding
{"eventDetails":[{"startDate":1387175589253,"eventJSON":"{\"userIp\":\"***.***.***.**\",\"organizationUid\":\"4261-5404a609bd14\",\"userAgent\":\"Restlet-Framework\/2.1m3\",\"currentSessionToken\":\"9f3ee5b076-27dbead458ca\",\"endTime\":1312,\"apiKey\":\"b6bd9-30849cf17727\",\"startTime\":13853,\"sessionToken\":null,\"eventId\":\"4731d1-adb6-10faaa3ee269\",\"userUid\":null,\"userId\":1,\"context\":\"\/v2\/account\/loginas\/anonymous\",\"eventName\":\"user-loginAs\""
I need to display eventJSON object as a raw data :
{\"userIp\":\"204.236.177.80\",\"organizationUid\":\"4261739e-ccae-11e1-adfb-5404a609bd14\",\"userAgent\":\"Restlet-Framework\/2.1m3\",\"currentSessionToken\":\"9f3ee54a-4f5f-b076-27d8ca\",\"endTime\":1387175589312,\"apiKey\":\"b6b8-4ad5-96d9-3084927\",\"startTime\":1387175589253,\"sessionToken\":null,\"eventId\":\"478e8-4ed1-adb6-10faaa3ee269\",\"userUid\":null,\"userId\":11878,\"context\":\"\/v2\/act\/lonas\/anonymous\",\"eventName\":\"user-loginAs\"}
how to display eventJSON using gson and printing with c:out.
JSP Page
<tr id="datalogList-${gC.index}">
<td id = "eventName-${gC.index}">
<c:out value="${datalog.eventName}" />
</td>
<td id = "startTime-${gC.index}">
<c:out value="${datalog.startTime}" />
</td>
<td id = "endTime-${gC.index}">
<c:out value="${datalog.endTime}" />
</td>
<td id = "apiKey-${gC.index}"></a>
<c:out value="${datalog.apiKey}" />
</td>
</tr>
Java
Datalogging[] logevents = (Datalogging[]) gson.fromJson(eventValueList.toString(),Datalogging[].class);
Thanks for reading.
You have it as a JavaScript variable like so:
var persons = [ { "name": "John Doe", "address": "Main Street 1" }, { "name": "Jane Doe", "address": "Baker Street 1" }, { "name": "Jack Doe", "address": "Church Street 1" } ];
I'd suggest to use jQuery to create a HTML table out of it.
<!DOCTYPE html>
<html lang="en">
<head>
<title>Test</title>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script>
var persons = [
{ "name": "John Doe", "address": "Main Street 1" },
{ "name": "Jane Doe", "address": "Baker Street 1" },
{ "name": "Jack Doe", "address": "Church Street 1" }
];
$(document).ready(function() {
var table = $('<table/>').appendTo($('#somediv'));
$(persons).each(function(i, person) {
$('<tr/>').appendTo(table)
.append($('<td/>').text(person.name))
.append($('<td/>').text(person.address));
});
});
</script>
</head>
<body>
<div id="somediv"></div>
</body>
</html>
2. You have it as a Java String variable like so:
String jsonPersons = "["
+ "{ \"name\": \"John Doe\", \"address\": \"Main Street 1\" },"
+ "{ \"name\": \"Jane Doe\", \"address\": \"Baker Street 1\" },"
+ "{ \"name\": \"Jack Doe\", \"address\": \"Church Street 1\" }"
+ "]";
Then I suggest to use a JSON parser to get a List out of it, like Google Gson:
List<Person> persons = new Gson().fromJson(jsonPersons, new TypeToken<List<Person>>() {}.getType());
Where the Person class look like this:
public class Person {
private String name;
private String address;
// Add or generate getters/setters.
}
Let the servlet put it in the request scope and forward to JSP for display like so:
request.setAttribute("persons", persons);
request.getRequestDispatcher("/WEB-INF/persons.jsp").forward(request, response);
In JSP, use JSTL to iterate over it:
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
...
<table>
<c:forEach items="${persons}" var="person">
<tr>
<td>${person.name}</td>
<td>${person.address}</td>
</tr>
</c:forEach>
</table>
3 Same as 2), you have it as a Java variable, but you'd like to obtain it by Ajax in JSP. Then create a Servlet class which does the following in doGet() method:
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json");
response.getWriter().write(jsonPersons);
And call it by jQuery Ajax with a callback which does the same as 1).
$(document).ready(function() {
var table = $('<table/>').appendTo($('#somediv'));
$.getJSON('url/to/servlet', function(persons) {
persons.each(function(i, person) {
$('<tr/>').appendTo(table)
.append($('<td/>').text(person.name))
.append($('<td/>').text(person.address));
});
});
});
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