spring mvc数据绑定和表单标签的应用（附带实例）-亚博电竞手机版

应用的相关配置

                     springmvc         org.springframework.web.servlet.dispatcherservlet     1                   springmvc         /                        encodingfilter                       org.springframework.web.filter.characterencodingfilter                       encoding         utf-8                   forceencoding         true                        encodingfilter         /*      

领域模型

 package pojo;  public class user {     private string username;     private string[] hobby; // 兴趣爱好     private string[] friends; // 朋友     private string carrer;     private string houseregister;     private string remark;     // 省略setter和getter方法 }

service 层

 package service; import java.util.arraylist; import pojo.user; public interface userservice {     boolean adduser(user u);     arraylist getusers(); }

 package service;  import java.util.arraylist; import pojo.user; @service public class userserviceimpl implements userservice {     // 使用静态集合变量users模拟数据库     private static arraylist users = new arraylist();      @override     public boolean adduser(user u) {         if (!"it民工".equals(u.getcarrer())) { // 不允许添加it民工             users.add(u);             return true;         }         return false;     }      @override     public arraylist getusers() {         return users;     } }

controller 层

 package controller;  import java.util.hashmap; import java.util.list; import org.apache.commons.logging.log; import org.apache.commons.logging.logfactory; import org.springframework.beans.factory.annotation.autowired; import org.springframework.stereotype.controller; import org.springframework.ui.model; import org.springframework.web.bind.annotation.modelattribute; import org.springframework.web.bind.annotation.requestmapping; import pojo.user; import service.userservice;  @controller @requestmapping("/user") public class usercontroller {     // 得到一个用来记录日志的对象,这样在打印信息的时候能够标记打印的是哪个类的信息     private static final log logger = logfactory.getlog(usercontroller.class);     @autowired     private userservice userservice;      @requestmapping(value = "/input")     public string inputuser(model model) {         hashmap hobbys = new hashmap();         hobbys.put("篮球", "篮球");         hobbys.put("乒乓球", "乒乓球");         hobbys.put("电玩", "电玩");         hobbys.put("游泳", "游泳");         // 如果model中没有user属性，useradd.jsp会抛出异常，因为表单标签无法找到         // modelattribute 属性指定的 form backing object         model.addattribute("user", new user());         model.addattribute("hobbys", hobbys);         model.addattribute("carrers", new string[] { "教师", "学生", "coding 搬运工",                 "it民工", "其他" });         model.addattribute("houseregisters", new string[] { "北京", "上海", "广州",                 "深圳", "其他" });         return "useradd";     }      @requestmapping(value = "/save")     public string adduser(@modelattribute user user, model model) {         if (userservice.adduser(user)) {             logger.info("成功");             return "redirect:/user/list";         } else {             logger.info("失败");             hashmap hobbys = new hashmap();             hobbys.put("篮球", "篮球");             hobbys.put("乒乓球", "乒乓球");             hobbys.put("电玩", "电玩");             hobbys.put("游泳", "游泳");             // 这里不需要 model.addattribute ("user", new user ()),因为 @modelattribute             // 指定 form backing object             model.addattribute("hobbys", hobbys);             model.addattribute("carrers", new string[] { "教师", "学生",                     " coding搬运工", "it民工", "其他" });             model.addattribute("houseregisters", new string[] { "北京", "上海",                     "广州", "深圳", "其他" });             return "useradd";         }     }      @requestmapping(value = "/list")     public string listusers(model model) {         list users = userservice.getusers();         model.addattribute("users", users);         return "userlist";     } }

view 层

 <%@ page language="java" contenttype="text/html; charset=utf-8"     pageencoding="utf-8"%> <%@taglib prefix="form" uri="http://www.springframework.org/tags/form"%>                     
             
 添加一个用户 
             
                 用户名:                              
             
                 爱好:                              
             
                 朋友:                  张三                  李四                  王五                  赵六             
             
                 职业:                                      请选择职业                                                   
             
                 户籍：                                      请选择户籍                                                   
             
                 个人描述:                              
             
                                               
         
       

 <%@ page language="java" contenttype="text/html; charset=utf-8"     pageencoding="utf-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>                                   
         
             
用户名
             
兴趣爱好
             
朋友
             
职业
             
户籍
             
个人描述
         
         
                 
${user.username }
                 
                                              ${hobby }                                       
                 
                                              ${friend }                                       
                 
${user.carrer }
                 
${user.houseregister }
                 
${user.remark }
             
              
  

测试应用