spring mvc portlet ajax

ViewBookController.java

import java.io.IOException;

import javax.portlet.ActionResponse;
import javax.portlet.ResourceRequest;
import javax.portlet.ResourceResponse;

import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.portlet.ModelAndView;
import org.springframework.web.portlet.bind.annotation.ActionMapping;
import org.springframework.web.portlet.bind.annotation.RenderMapping;
import org.springframework.web.portlet.bind.annotation.ResourceMapping;

import sample.code.listing.domain.Book;
import sample.code.listing.service.BookService;
import sample.code.listing.utils.LongNumberEditor;
import util.JsonMapper;

@Controller
@RequestMapping("VIEW")
public class ViewBookController {
 static Logger logger = Logger.getLogger(ViewBookController.class);
 @Autowired
 @Qualifier("myBookService")
 private BookService bookService;
 final JsonMapper jsonMapper = new JsonMapper(Book.class);
 final LongNumberEditor longNumberEditor = new LongNumberEditor();

 @ModelAttribute("book")
 public Book getBook(@RequestParam Long isbnNumber) {
  System.out.println("getBook:" + isbnNumber);
  return bookService.getBook(isbnNumber);
 }

 @InitBinder
 public void initBinder(WebDataBinder binder) {
  binder.registerCustomEditor(Long.class, longNumberEditor);
  binder.setDisallowedFields(new String[] { "isbnNumber" });
 }

 @ResourceMapping("jsonOutput")
 public String jsonOutput(ResourceRequest request) throws IOException {
  Long isbnNumber = longNumberEditor.getValue(request.getParameter("isbnNumber"));
  Book book = getBook(isbnNumber);
  request.setAttribute("book", book);
  return "viewBookForm2";
 }

 @RenderMapping(params = "myaction=viewBookForm")
 public String showViewBookForm() {
  return "viewBookForm";
 }

 @ResourceMapping
 public ModelAndView toJson(@ModelAttribute("book") Book book, ResourceRequest request, ResourceResponse response) {
  response.setContentType("text/plain");
  try {
   response.getWriter().println(jsonMapper.toJson(book));
  } catch (IOException e) {
   logger.error("exception serving resource: {}" + e.getMessage());
  }
  return null;
 }

 @ResourceMapping("jsonView1")
 public ModelAndView toJson1(@ModelAttribute("book") Book book, ResourceRequest request, ResourceResponse response) {
  response.setContentType("text/plain");
  try {
   response.getPortletOutputStream().write(jsonMapper.toJson(book).getBytes());
  } catch (IOException e) {
   logger.error("exception serving resource: {}" + e.getMessage());
  }
  return null;
 }

 @ResourceMapping("jsonView2")
 public void toJson2(ResourceRequest request, ResourceResponse response) throws IOException {
  response.setContentType("text/plain");
  try {
   Long isbnNumber = longNumberEditor.getValue(request.getParameter("isbnNumber"));
   response.getPortletOutputStream().write(jsonMapper.toJson(getBook(isbnNumber)).getBytes());
  } catch (IOException e) {
   logger.error("exception serving resource: {}" + e.getMessage());
  }
 }

 @ActionMapping(params = "myaction=viewBook")
 public void viewBook(@ModelAttribute("book") Book book, ActionResponse response) {
  //--this is required. the getBook method is not invoked but the @RequestParam
  //--is still evaluated
  response.setRenderParameter("isbnNumber", book.getIsbnNumber().toString());
  response.setRenderParameter("myaction", "viewBookForm");
 }
}

viewBookForm.jsp

<%@ taglib prefix="portlet" uri="http://java.sun.com/portlet_2_0"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<%@ page contentType="text/html" isELIgnored="false"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>

<portlet:actionURL var="viewBookActionUrl">
 <portlet:param name="myaction" value="viewBook" />
</portlet:actionURL>
<portlet:renderURL var="homeUrl">
 <portlet:param name="myaction" value="books" />
</portlet:renderURL>
<portlet:resourceURL var="default1" escapeXml="false" id="default1">
</portlet:resourceURL>
<portlet:resourceURL var="jsonView1" escapeXml="false" id="jsonView">
</portlet:resourceURL>
<portlet:resourceURL var="jsonView2" escapeXml="false" id="jsonView">
</portlet:resourceURL>
<portlet:resourceURL var="jsonOutput" escapeXml="false" id="jsonOutput">
</portlet:resourceURL>

<script type="text/javascript" src="http://code.jquery.com/jquery-1.6.1.js" ></script>
<script type="text/javascript">
 function showJson(url) {
   $.get(url, function(response) {
   $("#ajaxContent").html(response);
  var json = eval(&apos;(&apos; + response + &apos;)&apos;);
  alert(json.name);
   });
 }
 function showJsonMarkup(url) {
   $.get(url, function(response) {
   $("#ajaxMarkup").html(response);
   //alert(${"#ajaxMarkup"}.html())
   });
 }
</script>

<div id="ajaxContent">
</div>

<div id="ajaxMarkup">
</div>

<form:form name="viewBookForm" commandName="book" method="post"
 action="${viewBookActionUrl}">
 <table>
  <tr align="left">
   <a href="${homeUrl}">Home</a>
  </tr>
 </table>
 <table>
  <tr>
   <td>Name:<font style="color: #C11B17;"></font></td>
   <td>${book.name}</td>
   <td><font style="color: #C11B17;"></font></td>
  </tr>
  <tr>
   <td>Author:<font style="color: #C11B17;"></font></td>
   <td>${book.author}</td>
   <td><font style="color: #C11B17;"></font></td>
  </tr>
  <tr>
   <td>ISBN:<font style="color: #C11B17;"></font></td>
   <td>${book.isbnNumber}</td>
   <td><font style="color: #C11B17;"></font></td>
  </tr>
 </table>
</form:form>
<br></br>
<a href="${default1}">json data</a><br/>
<a href="${jsonView1}">json data 1</a><br/>
<a href="${jsonView2}">json data 2</a><br/>
<a href="${jsonOutput}">json markup</a><br/>
<a onclick="showJson(&apos;${jsonView1}&apos;); return false" href="javascript:void(0)">json data ajax 1</a><br/>
<a onclick="showJson(&apos;${jsonView2}&apos;); return false" href="javascript:void(0)">json data ajax 2</a><br/>
<a onclick="showJsonMarkup(&apos;${jsonOutput}&apos;); return false" href="javascript:void(0)">json markup ajax</a><br/>
<br></br>

<form:form name="viewBookForm" commandName="book" method="post"
 action="${homeUrl}">
 <input type="submit" value="Home" name="Home" />
</form:form>

viewBookForm2.jsp

<%@ taglib prefix="portlet" uri="http://java.sun.com/portlet_2_0"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<%@ page contentType="text/html" isELIgnored="false"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>

<table>
 <tr>
  <td>Name:<font style="color: #C11B17;"></font></td>
  <td>${book.name}</td>
  <td><font style="color: #C11B17;"></font></td>
 </tr>
 <tr>
  <td>Author:<font style="color: #C11B17;"></font></td>
  <td>${book.author}</td>
  <td><font style="color: #C11B17;"></font></td>
 </tr>
 <tr>
  <td>ISBN:<font style="color: #C11B17;"></font></td>
  <td>${book.isbnNumber}</td>
  <td><font style="color: #C11B17;"></font></td>
 </tr>
</table>