SpringMVC如何获取表单数据(radio和checkbox)

SpringMVC如何获取表单数据(radio和checkbox)

SpringMVC获取表单数据

1、实体类

package cn.hadron.bean;

import java.io.Serializable;

import java.util.Arrays;

/**

* create table users(

id int auto_increment primary key,

username varchar(45),

password varchar(45),

age int default 0

);

insert into users(username,password,age) values('hadron','123',18);

* @author chengyq

*

*/

// 域对象，实现序列化接口

public class UserBean implements Serializable {

private Integer id;

private String username;

private String password;

private String birthday;

private Integer age;

//测试单选按钮

private String sex;

//测试复选按钮

private String[] favorite;

public UserBean() {}

public UserBean(String username, String password,int age) {

this.username = username;

this.password = password;

this.age=age;

}

public UserBean(String username, String birthday,String sex) {

this.username = username;

this.birthday = birthday;

this.sex=sex;

}

public Integer getId() {

return id;

}

public String getUsername() {

return username;

}

public String getPassword() {

return password;

}

ZuXiayu public Integer getAge() {

return age;

}

public void setId(Integer id) {

this.id = id;

}

public void setUsername(String username) {

this.username = username;

}

public void setPassword(String password) {

this.password = password;

}

public void setAge(Integer age) {

this.age = age;

}

public String getSex() {

return sex;

}

public void setSex(String sex) {

this.sex = sex;

}

public String[] getFavorite() {

return favorite;

}

public void setFavorite(String[] favorite) {

this.favorite = favorite;

}

public String getBirthday() {

return birthday;

}

public void setBirthday(String birthday) {

this.birthday = birthday;

}

@Override

public String toString() {

return "UserBean{" +

"id=" + id +

", username='" + username + '\'' +

", password='" + password + '\'' +

", birthday='" + birthday + '\'' +

", age=" + age +

", sex='" + sex + '\'' +

", favorite=" + Arrays.toString(favorite) +

'}';

}

}

2、控制器

package cn.hadron.controller;

import cn.hadron.bean.UserBean;

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 org.springframework.web.bind.annotation.RequestMethod;

import java.util.ArrayList;

import java.util.List;

@Controller

@RequestMapping(value = "/f")

public class FormController {

@RequestMapping(value="/getEditPage",method= RequestMethod.GET)

public String getEditPage(Model model) {

System.out.println("表单测试");

UserBean user = new UserBean("jack","1997-7-1","女");

// model中添加属性user，值是user对象

model.addAttribute("user",user);

//返回Edit.jsp页面

return "edit";

}

@RequestMapping(value="/edit",method=RequestMethod.POST)

public String edit(@ModelAttribute UserBean user,Model model) {

System.out.println("获取表单数据：");

//@ModelAttribute注解指示了参数应该从模型（这里所说的“模型”指 Model）中获取

model.addAttribute("username", user.getUsername());

model.addAttribute("birthday", user.getBirthday());

model.addAttribute("sex", user.getSex());

model.addAttribute("favorite", user.getFavorite());

System.out.println("user="+user);

//返回userPage.jsp页面

return "userPage";

}

/**

* 可以用@ModelAttribute注解的方法做一些初始化操作。

* 当同一个controller中有多个方法被@ModelAttribute注解标记，

* 所有被@ModelAttribute标记的方法均会被执行，按先后顺序执行，然后再进入请求的方法

* @return

*/

@ModelAttribute("webList")

public List getWebList() {

List webList = new ArrayList();

webList.add("SpringMVC");

webList.add("SpringBoot");

webList.add("SpringCloud");

return webList;

}

}

3、页面

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<%@ taglib prefix="form" uri="http://springframework.org/tags/form" %>

<%--

Created by IntelliJ IDEA.

User: chengyq

Date: 2018/9/3

Time: 14:27

To change this template use File | Settings | File Templates.

--%>

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<%@taglib uri="http://springframework.org/tags/form" prefix="form"%>

<%

String[] favorite = (String[])request.getAttribute("favorite");

for(String f: favorite) {

out.println(f);

}

%>

SpringMVC获取表单参数

以下几种方式只有在已搭好的SpringMVC环境中，才能执行成功！

一、首先，写一个登陆页面和一个Bean类

登陆页面

<%@ page language="java" contentType="text/html; charset=UTF-8"

pageEncoding="UTF-8"%>

method="post">

java实体类

package com.yyx.model;

public class User{

private String userName;

private String userPwd;

public String getUserName() {

return userName;

}

public void setUserName(String userName) {

this.userName = userName;

}

public String getUserPwd() {

return userPwd;

}

public void setUserPwd(String userPwd) {

this.userPwd = userPwd;

}

}

二、获取表单数据的方法

1、直接把表单的参数写在Controller相应的方法的形参中

注意：控制器中方法的形参String userName，String userPwd名称必须和登陆页面的name="userName"，name="userPwd"相同

package com.yyx.controller;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

@Controller

@RequestMapping("/user")

public class UserController {

@RequestMapping("/login")

public String loginByUser(String userName, String userPwd) {

System.out.println("userName is:" + userName);

System.out.println("userPwd is:" + userPwd);

return "success";

}

}

2.通过HttpServletRequest接收

控制器中

String userName=request.getParameter("userName");

String userPwd=request.getParameter("userPwd");

的参数名称必须和登陆页面的name="userName"，name="userPwd"相同

package com.yyx.controller;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

@Controller

@RequestMapping("/user")

public class UserController {

@RequestMapping("/login")

public String loginByUser(HttpServletRequest request) {

String userName=request.getParameter("userName");

String userPwd=request.getParameter("userPwd");

System.out.println("userName is:" + userName);

System.out.println("userPwd is:" + userPwd);

return "success";

}

}

3.通过一个bean来接收

登陆页面的name="userName"，name="userPwd"必须和Bean类的属性名称相同

package com.yyx.controller;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import com.yyx.model.User;

@Controller

@RequestMapping("/user")

public class UserController {

@RequestMapping("/login")

public String loginByUser(User user) {

System.out.println("userName is:" + user.getUserName());

System.out.println("userPwd is:" + user.getUserPwd());

return "success";

}

}

4.利用js中ajax请求通过json数据接收

在页面中添加js代码

控制器中的代码和方法3中的相同。

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