ZK 数据传输二：使用Hibernate/Spring在后台获取数据(jsp页面，实现CRUD)
index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://www.zkoss.org/jsp/zul" prefix="z"%> <!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>ZK Data Demo</title> </head> <body> <z:page zscriptLanguage="java"> <z:window id="win3" title="Spring后台获取数据---------->Users" border="normal" width="500px" use="cn.wempire.zkcrud.web.ui.UserWindow"> <z:vbox> <z:listbox mold="paging" id="lb" width="490px" rows="5" pageSize="5"> <z:listhead> <z:listheader label="LoginName" width="150px" sort="auto" /> <z:listheader label="Password" width="150px" sort="auto"/> </z:listhead> </z:listbox> <z:hbox> <z:button label="Change Paging Mold"> <z:attribute name="onClick"> lb.pagingChild.mold = "os".equals(lb.pagingChild.mold) ? "default" : "os"; </z:attribute> </z:button> <z:button label="创建" forward="onNew" /> <z:button label="更新" forward="onUpdate" /> <z:button label="删除" forward="onDelete" /> </z:hbox> </z:vbox> </z:window> </z:page> </body> </html>
分页,排序（使用默认算法）都在下面一段代码中，一看就懂，不赘述：
<z:listbox mold="paging" id="lb" width="490px" rows="5" pageSize="5">
<z:listhead>
<z:listheader label="LoginName" width="150px" sort="auto" />
<z:listheader label="Password" width="150px" sort="auto"/>
</z:listhead>
</z:listbox>
在后台创建Window的类UserWindow：
public class UserWindow extends Window
{
/**
*
*/
private static final long serialVersionUID = 1L;
private UserService userService;
private List users;
public void onCreate() throws Exception
{
ApplicationContext ctx = WebApplicationContextUtils
.getRequiredWebApplicationContext((ServletContext) getDesktop()
.getWebApp().getNativeContext());
userService = (UserService) ctx.getBean("userService");
users = userService.findAllUsers();
render();
}
protected void render()
{
Listbox lb = (Listbox) this.getFellow("lb");
lb.getItems().clear();
for (Iterator it = users.iterator(); it.hasNext();)
{
User t = (User) it.next();
Listitem lt = new Listitem();
lt.setValue(t);
Listcell lc = new Listcell(t.getLoginName());
lc.setHeight("30px");
lt.appendChild(lc);
Listcell lc2 = new Listcell(t.getPassword());
lc2.setHeight("30px");
lt.appendChild(lc2);
lb.appendChild(lt);
}
}
public void onNew() throws Exception
{
Window win = (Window) Executions.createComponents("task.zul", null,
null);
win.doModal();
if (win.getAttribute("OK") != null)
{
users = userService.findAllUsers();
render();
}
}
public void onUpdate() throws Exception
{
Listbox lb = (Listbox) this.getFellow("lb");
Listitem lt = lb.getSelectedItem();
if (lt == null)
return;
User t = (User) lt.getValue();
Map params = new HashMap();
params.put("user", t);
Window win = (Window) Executions.createComponents("task.zul", null,
params);
win.doModal();
if (win.getAttribute("OK") != null)
{
users = userService.findAllUsers();
render();
}
}
public void onDelete() throws Exception
{
Listbox lb = (Listbox) this.getFellow("lb");
Listitem lt = lb.getSelectedItem();
if (lt == null)
return;
User t = (User) lt.getValue();
userService.delete(t.getId());
lt.detach();
}
}
用于创建和更新数据的页面task.zul,注意user属性与后台的对应，arg指后台传递过来的数据（即UserWindow中的params）：
<?xml version="1.0" encoding="utf-8"?>
<window id="userWnd" title="User" border="normal" width="300px"
use="cn.wempire.zkcrud.web.ui.PopWindow" user="${arg.user}">
<vbox>
<grid>
<columns>
<column width="150px"/>
</columns>
<rows>
<row>
LoginName:
<textbox id="LoginName"/>
</row>
<row>
Password:
<textbox id="Password" rows="5" cols="25"/>
</row>
</rows>
</grid>
<hbox>
<button label="OK" forward="onOK()"/>
<button label="Cancle" forward="onCancle()"/>
</hbox>
</vbox>
</window>
task.zul背后的类PopWindow.java：
package cn.wempire.zkcrud.web.ui;
import javax.servlet.ServletContext;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.zkoss.zul.Textbox;
import org.zkoss.zul.Window;
import cn.wempire.zkcrud.pojo.User;
import cn.wempire.zkcrud.service.UserService;
public class PopWindow extends Window
{
/**
*
*/
private static final long serialVersionUID = 1L;
protected UserService userService;
protected User user;
public User getUser()
{
return user;
}
public void setUser(User user)
{
this.user = user;
}
public void onCreate()
{
if (user != null)
{
// update
Textbox ctrl = (Textbox) this.getFellow("LoginName");
ctrl.setValue(user.getLoginName());
ctrl = (Textbox) this.getFellow("Password");
ctrl.setValue(user.getPassword());
}
// spring bean
ApplicationContext ctx = WebApplicationContextUtils
.getRequiredWebApplicationContext((ServletContext) getDesktop()
.getWebApp().getNativeContext());
userService = (UserService) ctx.getBean("userService");
}
public void onOK() throws Exception
{
if (user == null)
{
// new
user = new User();
Textbox ctrl = (Textbox) this.getFellow("LoginName");
user.setLoginName(ctrl.getValue());
ctrl = (Textbox) this.getFellow("Password");
user.setPassword(ctrl.getValue());
userService.save(user);
}
else
{
// update
Textbox ctrl = (Textbox) this.getFellow("LoginName");
user.setLoginName(ctrl.getValue());
ctrl = (Textbox) this.getFellow("Password");
user.setPassword(ctrl.getValue());
userService.update(user);
}
this.setAttribute("OK", Boolean.TRUE);
this.detach();
}
public void onCancle()
{
this.detach();
}
}
注意PopWindow中得到Spring类的方式：
ApplicationContext ctx = WebApplicationContextUtils
.getRequiredWebApplicationContext((ServletContext) getDesktop()
.getWebApp().getNativeContext());
userService = (UserService) ctx.getBean("userService");