本篇内容介绍了“SpringMVC获取表单数据的方法”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
SpringMVC获取表单数据
1、实体类
package cn.hadron.bean;import java.io.Serializable;import java.util.Arrays;// 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"; } @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><h4>用户信息编辑页面</h4><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="${webList}" path="favorite" /></td> </tr> <tr> <td colspan="2"> <input type="submit" value="提交变更"/> </td> </tr> </table></form:form></body></html>
<%-- Created by IntelliJ IDEA. User: chengyq Date: 2018/9/3 Time: 14:27 To change this template use File | Settings | File Templates.--%><%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%><html><head> <title>Title</title></head><body><h3>您提交的用户信息</h3><table> <tr> <td>Username</td> <td>${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！
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"%> <!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; }}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
<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。
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