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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;
- }
- 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<String> getWebList() {
- List<String> webList = new ArrayList<String>();
- 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://www.springframework.org/tags/form" %>
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="UTF-8">
- <title>测试form标签</title>
- </head>
- <body>
- <h3>用户信息编辑页面</h3>
- <form:form modelAttribute="user" method="post" action="/elastic/f/edit.do" >
- <table>
- <tr>
- <td>姓名:</td>
- <td><form:input path="username"/></td>
- </tr>
- <tr>
- <td>性别:</td>
- <td>
- <form:radiobutton path="sex" value="男" label="男" />
- <form:radiobutton path="sex" value="女" label="女" />
- </td>
- </tr>
- <tr>
- <td>生日:</td>
- <td><form:input path="birthday"/></td>
- </tr>
- <tr>
- <td>爱好:</td>
- <td><form:checkboxes items="${webList}" path="favorite" /></td>
- </tr>
- <tr>
- <td colspan="2">
- <input type="submit" value="提交变更"/>
- </td>
- </tr>
- </table>
- </form:form>
- </body>
- </html>
- <%--
- Created by IntelliJ IDEA.
- User: chengyq
- Date: 2018/9/3
- Time: 14:27
- To change this template use File | Settings | File Templates.
- --%>
- <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
- <%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
- <html>
- <head>
- <title>Title</title>
- </head>
- <body>
- <h2>您提交的用户信息</h2>
- <table>
- <tr>
- <td>Username</td>
- <td>${username}</td>
- </tr>
- <tr>
- <td>Birthday</td>
- <td>${birthday}</td>
- </tr>
- <tr>
- <td>Sex</td>
- <td>${sex}</td>
- </tr>
- <tr>
- <td>favorite</td>
- <td>
- <%
- String[] favorite = (String[])request.getAttribute("favorite");
- for(String f: favorite) {
- out.println(f);
- }
- %>
- </td>
- </tr>
- </table>
- </body>
- </html>
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! 。
1、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"%>
-
- <!DOCTYPE html>
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
- <title>yyx博客后台登录</title>
- </head>
- <body>
- <form action="${pageContext.request.contextPath}/user/login.do"
- method="post">
- <table>
- <tr>
- <td>用户名:</td>
- <td><input type="text" name="userName"></td>
- </tr>
- <tr>
- <td>密码:</td>
- <td><input type="password" name="userPwd"></td>
- </tr>
- <tr>
- <td colspan="2"><input type="submit" value="登陆"></td>
- </tr>
- </table>
- </form>
- </body>
- </html>
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;
- }
- }
2、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 。
- <script type="text/javascript"
- src="${pageContext.request.contextPath}/static/jquery-3.1.1.min.js"></script>
- <script type="text/javascript">
- $(document).ready(function() {
- $("#button_submit").click(function() {
- var name = $("#userName").val();
- var pwd = $("#userPwd").val();
- var user = {
- userName : name,
- userPwd : pwd
- };//拼装成json格式
- $.ajax({
- type : "POST",
- url : "${pageContext.request.contextPath}/user/login.do",
- data : user,
- success : function(data) {
- alert("成功");
- },
- error : function(e) {
- alert("出错:" + e);
- }
- });
- });
- });
- </script>
控制器中的代码和方法3中的相同.
以上为个人经验,希望能给大家一个参考,也希望大家多多支持我们.
原文链接:https://blog.csdn.net/chengyuqiang/article/details/82348542 。
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