Question

我是jsp的新手。我有一个JSON编码

{"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\""

我需要将eventJSON对象显示为原始数据：

{\"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\"}

如何使用gson显示eventJSON并使用c:out进行打印。

JSP页面

<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>

爪哇

  Datalogging[]  logevents = (Datalogging[]) gson.fromJson(eventValueList.toString(),Datalogging[].class);

感谢阅读。

Answer 1

您可以将其作为JavaScript变量：

var persons = [ {“name”：“John Doe”，“address”：“Main Street 1”}， {“name”：“Jane Doe”，“地址”：“Baker Street 1”}， {“name”：“Jack Doe”，“address”：“Church Street 1”} ];

我建议使用jQuery从中创建一个HTML表。

<!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。你将它作为Java String变量，如下所示：

String jsonPersons = "["
    + "{ \"name\": \"John Doe\", \"address\": \"Main Street 1\" },"
    + "{ \"name\": \"Jane Doe\", \"address\": \"Baker Street 1\" },"
    + "{ \"name\": \"Jack Doe\", \"address\": \"Church Street 1\" }"
+ "]";

然后我建议使用JSON解析器从中获取List，例如Google Gson：

List<Person> persons = new Gson().fromJson(jsonPersons, new TypeToken<List<Person>>()       {}.getType());

Person类看起来像这样：

public class Person {
   private String name;
   private String address;
   // Add or generate getters/setters.
}

让servlet将它放在请求范围内并转发到JSP进行显示，如下所示：

request.setAttribute("persons", persons); 
request.getRequestDispatcher("/WEB-INF/persons.jsp").forward(request, response);

在JSP中，使用JSTL迭代它：

<%@ 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与2相同，你将它作为Java变量，但是你想在JSP中通过Ajax获取它。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);

并通过jQuery Ajax调用它，回调与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));
    });
  });
});

如何在jsp中显示Json对象

1 个答案: