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jQuery treeview在JSP中的应用：ASYNC

2009-08-17 22:29 211 查看

1. async.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
       <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
       <title>Insert title here</title>
       <link rel="stylesheet" href="css/jquery.treeview.css" />
       <link rel="stylesheet" href="css/screen.css" />

       <script src="javascript/jquery.js" type="text/javascript"></script>
       <script src="javascript/jquery.cookie.js" type="text/javascript"></script>
       <script src="javascript/jquery.treeview.js" type="text/javascript"></script>
       <script src="javascript/jquery.treeview.async.js"
           type="text/javascript"></script>

       <script type="text/javascript">
           $(document).ready(function(){
              $("#black").treeview({
                  url: "source.html",
                  control: "#treecontrol",
                  persist: "location"
              });
           });
       </script>
    </head>
    <body>
       <h1 id="banner">
           <a
              href="http://bassistance.de/jquery-plugins/jquery-plugin-treeview/">jQuery
              Treeview Plugin</a> Demo
       </h1>
       <div id="main">
           <a href=".">Main</a>
           <h4>
              Sample - async
           </h4>
           <div id="treecontrol">
              <a title="Collapse the entire tree below" href="#"><img
                     src="images/minus.gif" /> Collapse All</a>
              <a title="Expand the entire tree below" href="#"><img
                     src="images/plus.gif" /> Expand All</a>
              <a
                  title="Toggle the tree below, opening closed branches, closing open branches"
                  href="#">Toggle All</a>
           </div>
           <ul id="black">
           </ul>
       </div>
    </body>
</html>

2. SourceController
@Controller
public class SourceController {

    @Autowired
    SourceService sourceService;

    @RequestMapping("/source.html")
    public void source(HttpServletRequest request, HttpServletResponse response)
           throws IOException {
       request.setCharacterEncoding("utf-8");
       response.setContentType("text/json;charset=UTF-8");

       PrintWriter out = response.getWriter();
       String root = request.getParameter("root");
       String output = sourceService.generateNodeString(root);
       out.print(output);
       out.flush();
       out.close();
    }
}

3. SourceService
@Service("sourceService")
public class SourceService {

    @Autowired

    TestDao testDao;


    public String generateNodeString(String root) {
       if (root == null) {
           return "";
       } else if (root.equalsIgnoreCase("source")) {
           return generateTopTreeString();
       } else {
           return generateSubTreeString(Long.parseLong(root));
       }
    }

    private String generateTopTreeString() {
       StringBuilder sb = new StringBuilder();
       sb.append("[");

       List<Item> list = testDao.findTopItem();

       int i = 0;
       for (Iterator<Item> it = list.iterator(); it.hasNext(); i++) {
           if (i > 0) {
              sb.append(",");
           }
           Item item = (Item) it.next();
           sb.append(generateNodeString(item));
       }

       sb.append("]");
       return sb.toString();
    }

    private String generateSubTreeString(Long itemId) {
       StringBuilder sb = new StringBuilder();
       sb.append("[");

       List<Item> list = testDao.findSubItem(itemId);

       int i = 0;
       for (Iterator<Item> it = list.iterator(); it.hasNext(); i++) {
           if (i > 0) {
              sb.append(",");
           }
           Item item = (Item) it.next();
           sb.append(generateNodeString(item));
       }

       sb.append("]");
       return sb.toString();
    }

    private String generateNodeString(Item item) {
       StringBuilder sb = new StringBuilder();
       sb.append(" {");
       sb.append(" /"text/": /"" + generateLinkString(item) + "/"");

       if (testDao.hasSubItem(item.getItemId())) {
           sb.append(", /"id/":/"" + item.getItemId() + "/"");
           sb.append(", /"hasChildren/":true");
       }

       sb.append(" }");
       return sb.toString();
    }

    private String generateLinkString(Item item) {
       return "<a href='menu.html?menuId=" + item.getItemId()
              + "' target='main' >" + item.getItem() + "</a>";
    }
}

4. Item

public class Item implements java.io.Serializable {
……
private Long itemId;
    private String item;
    private Long itemLevel;
    private Set<Item> itemsForParentId = new HashSet<Item>(0);
    private Set<Item> itemsForItemId = new HashSet<Item>(0);
……
}

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标签： jquery jsp string autowired stylesheet tree

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