以下示例说明如何使用Spring Web MVC框架在表单中使用多个复选框.首先，让我们使用一个有效的Eclipse IDE，并坚持以下步骤，使用Spring Web Framework开发基于动态表单的Web应用程序.
| Step | 描述 |
|---|---|
| 1 | 在com.it1352包下创建一个名为HelloWeb的项目，如Spring MVC - Hello World章. |
| 2 | 在com.it1352包下创建Java类User，UserController. |
| 3 | 在jsp子文件夹下创建视图文件user.jsp，users.jsp. |
| 4 | 最后一步是创建源文件和配置文件的内容并导出应用程序，如下所述. |
package com.it1352;
public class User {
private String username;
private String password;
private String address;
private boolean receivePaper;
private String [] favoriteFrameworks;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public boolean isReceivePaper() {
return receivePaper;
}
public void setReceivePaper(boolean receivePaper) {
this.receivePaper = receivePaper;
}
public String[] getFavoriteFrameworks() {
return favoriteFrameworks;
}
public void setFavoriteFrameworks(String[] favoriteFrameworks) {
this.favoriteFrameworks = favoriteFrameworks;
}
}package com.it1352;
import java.util.ArrayList;
import java.util.List;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.ui.ModelMap;
@Controller
public class UserController {
@RequestMapping(value = "/user", method = RequestMethod.GET)
public ModelAndView user() {
User user = new User();
user.setFavoriteFrameworks((new String []{"Spring MVC","Struts 2"}));
ModelAndView modelAndView = new ModelAndView("user", "command", user);
return modelAndView;
}
@RequestMapping(value = "/addUser", method = RequestMethod.POST)
public String addUser(@ModelAttribute("SpringWeb")User user,
ModelMap model) {
model.addAttribute("username", user.getUsername());
model.addAttribute("password", user.getPassword());
model.addAttribute("address", user.getAddress());
model.addAttribute("receivePaper", user.isReceivePaper());
model.addAttribute("favoriteFrameworks", user.getFavoriteFrameworks());
return "users";
}
@ModelAttribute("webFrameworkList")
public List<String> getWebFrameworkList() {
List<String> webFrameworkList = new ArrayList<String>();
webFrameworkList.add("Spring MVC");
webFrameworkList.add("Struts 1");
webFrameworkList.add("Struts 2");
webFrameworkList.add("Apache Wicket");
return webFrameworkList;
}
}这里，对于第一种服务方法 user()，我们已经通过了名为"command"的ModelAndView对象中的空白用户对象，因为如果您使用< form:form>，则spring框架需要名为"command"的对象. JSP文件中的标记.因此，当调用 user()方法时，它会返回 user.jsp 视图.
第二种服务方法将对 HelloWeb/addUser URL上的POST方法调用addUser().您将根据提交的信息准备模型对象.最后，将从service方法返回"users"视图，这将导致呈现users.jsp
<%@taglib uri = "http://www.springframework.org/tags/form" prefix = "form"%>
<html>
<head>
<title>Spring MVC Form Handling</title>
</head>
<body>
<h2>User Information</h2>
<form:form method = "POST" action = "/HelloWeb/addUser">
<table>
<tr>
<td><form:label path = "username">User Name</form:label></td>
<td><form:input path = "username" /></td>
</tr>
<tr>
<td><form:label path = "password">Age</form:label></td>
<td><form:password path = "password" /></td>
</tr>
<tr>
<td><form:label path = "address">Address</form:label></td>
<td><form:textarea path = "address" rows = "5" cols = "30" /></td>
</tr>
<tr>
<td><form:label path = "receivePaper">Subscribe Newsletter</form:label></td>
<td><form:checkbox path = "receivePaper" /></td>
</tr>
<tr>
<td><form:label path = "favoriteFrameworks">Favorite Web Frameworks</form:label></td>
<td><form:checkboxes items = "${webFrameworkList}" path = "favoriteFrameworks" /></td>
</tr>
<tr>
<td colspan = "2">
<input type = "submit" value = "Submit"/>
</td>
</tr>
</table>
</form:form>
</body>
</html>在这里，我们使用< form:checkboxes/> 标记来呈现HTML复选框.
<form:checkboxes items = "${webFrameworkList}" path = "favoriteFrameworks" />它将呈现以下HTML内容.
<span> <input id = "favoriteFrameworks1" name = "favoriteFrameworks" type = "checkbox" value = "Spring MVC" checked = "checked"/> <label for = "favoriteFrameworks1">Spring MVC</label> </span> <span> <input id = "favoriteFrameworks2" name = "favoriteFrameworks" type = "checkbox" value = "Struts 1"/> <label for = "favoriteFrameworks2">Struts 1</label> </span> <span> <input id = "favoriteFrameworks3" name = "favoriteFrameworks" type = "checkbox" value = "Struts 2" checked = "checked"/> <label for = "favoriteFrameworks3">Struts 2</label> </span> <span> <input id = "favoriteFrameworks4" name = "favoriteFrameworks" type = "checkbox" value = "Apache Wicket"/> <label for = "favoriteFrameworks4">Apache Wicket</label> </span> <input type = "hidden" name = "_favoriteFrameworks" value = "on"/>
<%@taglib uri = "http://www.springframework.org/tags/form" prefix = "form"%>
<html>
<head>
<title>Spring MVC Form Handling</title>
</head>
<body>
<h2>Submitted User Information</h2>
<table>
<tr>
<td>Username</td>
<td>${username}</td>
</tr>
<tr>
<td>Password</td>
<td>${password}</td>
</tr>
<tr>
<td>Address</td>
<td>${address}</td>
</tr>
<tr>
<td>Subscribed to Newsletter</td>
<td>${receivePaper}</td>
</tr>
<tr>
<td>Favorite Web Frameworks</td>
<td> <% String[] favoriteFrameworks = (String[])request.getAttribute("favoriteFrameworks");
for(String framework: favoriteFrameworks) {
out.println(framework);
}
%></td>
</tr>
</table>
</body>
</html>完成创建源文件和配置文件后，导出应用程序.右键单击您的应用程序，使用 Export → WAR文件选项并将 HelloWeb.war 文件保存在Tomcat的webapps文件夹中.
现在，启动Tomcat服务器并确保能够使用标准浏览器从webapps文件夹访问其他网页.尝试使用URL http://localhost:8080/HelloWeb/user ，如果Spring Web Application的一切正常，我们将看到以下屏幕.
提交所需信息后，单击"提交"按钮提交表单.如果您的Spring Web应用程序一切正常，我们将看到以下屏幕.
