Spring MVC列表多选框

以下示例显示如何在使用Spring Web MVC框架的表单中使用列表框(Listbox)。首先使用Eclipse IDE来创建一个WEB工程，实现一个让用户可选择自己所善长的技术(多选)的功能。并按照以下步骤使用Spring Web Framework开发基于动态表单的Web应用程序：

1. 创建一个名称为 Listbox 的动态WEB项目。
2. 在 com.yiibai.springmvc 包下创建两个Java类User，UserController。
3. 在jsp子文件夹下创建两个视图文件：user.jsp，userlist.jsp。
4. 最后一步是创建所有源和配置文件的内容并运行应用程序，详细如下所述。

完整的项目文件目录结构如下所示 -

User.java 的代码如下所示 -

package com.yiibai.springmvc;
public class User {

       private String username;
       private String password;
       private String address;
       private boolean receivePaper;
       private String [] favoriteFrameworks;   
       private String gender;
       private String favoriteNumber;
       private String country;
       private String [] skills;

       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;
       }
       public String getGender() {
          return gender;
       }
       public void setGender(String gender) {
          this.gender = gender;
       }
       public String getFavoriteNumber() {
          return favoriteNumber;
       }
       public void setFavoriteNumber(String favoriteNumber) {
          this.favoriteNumber = favoriteNumber;
       }
       public String getCountry() {
          return country;
       }
       public void setCountry(String country) {
          this.country = country;
       }
       public String[] getSkills() {
          return skills;
       }
       public void setSkills(String[] skills) {
          this.skills = skills;
       }
    }

Java

UserController.java 的代码如下所示 -

package com.yiibai.springmvc;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

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"}));
      user.setGender("M");
      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());
      model.addAttribute("gender", user.getGender());
      model.addAttribute("favoriteNumber", user.getFavoriteNumber());
      model.addAttribute("country", user.getCountry());
      model.addAttribute("skills", user.getSkills());
      return "userlist";
   }

   @ModelAttribute("webFrameworkList")
   public List<String>