How to display Json object in jsp

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I\'m newbie to jsp. I have a JSON coding

{\"eventDetails\":[{\"startDate\":1387175589253,\"eventJSON\":\"{\\\"userIp\\\":\\\"***.***.***.**\\\"


                      
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                  不要未来只要你来        
                
              
                            
                2021-01-06 19:56
              
            
            
                                                                       

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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