[Spring MVC] - Simple form submission instance

The form tags that come with Spring MVC are relatively simple, and often need to be completed with the help of EL and JSTL.

Here is a relatively simple form submission page function:

1. User model

 package com.my.controller.bean;import java.util.Date;import java.util.List;import javax.validation.constraints.Future;import javax.validation.constraints.Max;import javax.validation.constraints.Min;import javax.validation.constraints.NotNull;import org.hibernate.validator.constraints.Email;import org.hibernate.validator.constraints.Length;import org.hibernate.validator.constraints.NotEmpty;public class User { private long id; @Length(min=2, max=50, message="User name length range = 2-50") private String name; @Future(message="time cannot be less than today") private Date createTime; @NotEmpty(message="Customer cannot be empty") private List<Customer> customers; @NotNull(message="Girl cannot be empty") private boolean girl; private String[] cbx; @NotNull(message="Age can NOT be Null") @Min(value=18, message="minimum 18 years old") @Max(value=100, message="maximum 100 years old") private int age; @Email(message="Email format is incorrect") private String email; public long getId() { return id; } public void setId(long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Date getCreateTime() { return createTime; } public void setCreateTime(Date createTime) { this.createTime = createTime; } public List<Customer> getCustomers() { return customers; } public void setCustomers(List<Customer> customers) { this.customers = customers; } public boolean isGirl() { return girl; } public void setGirl(boolean girl) { this.girl = girl; } public String[] getCbx() { return cbx; } public void setCbx(String[] cbx) { this.cbx = cbx; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; }}

2. Controller

 package com.my.controller;import java.util.ArrayList;import java.util.Date;import java.util.List;import javax.validation.Valid;import org.springframework.stereotype.Controller;import org.springframework.validation.BindingResult;import org.springframework.validation.FieldError;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 com.my.controller.bean.Customer;import com.my.controller.bean.User;@Controller@RequestMapping(value="/post")public class TestPostController { private static List<User> users = new ArrayList<User>(); { //----------------------------------------------- // 设置Entity // ----------------------------------------------- users.add(new User()); User user = users.get(0); user.setId(1); user.setName("Robin"); user.setCreateTime(new Date()); user.setGirl(true); user.setCbx(new String[] {"1", "2", "3"}); user.setAge(18); user.setEmail("[email protected]"); user.setCustomers(new ArrayList<Customer>()); Customer customer1 = new Customer(); customer1.setId(1); customer1.setCompany("Company - 1"); customer1.setCreateTime(new Date()); customer1.setUser(user); user.getCustomers().add(customer1); Customer customer2 = new Customer(); customer2.setId(1); customer2.setCompany("Company - 2"); customer2.setCreateTime(new Date()); customer2.setUser(user); user.getCustomers().add(customer2); } @RequestMapping public ModelAndView index() { ModelAndView view = new ModelAndView("TestPost/index"); view.addObject("users", users); return view; } @RequestMapping(value="/addUser", method=RequestMethod.POST) public ModelAndView addUser(@ModelAttribute @Valid User user, BindingResult result) { ModelAndView view = new ModelAndView("redirect:/post"); if(result.hasErrors()) { List<FieldError> errors = result.getFieldErrors(); for(FieldError err : errors) { System.out.println("ObjectName:" + err.getObjectName() + "/tFieldName:" + err.getField() + "/tFieldValue:" + err.getRejectedValue() + "/tMessage:" + err.getDefaultMessage()); } view.addObject("users", users); return view; } user.setId(users.size() + 1); user.getCustomers().get(0).setId(1); user.getCustomers().get(0).setUser(user); users.add(user); view.addObject("users", users); return view; } }

3. View

 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ page import="com.my.controller.bean.*" %><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%><%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %><%@ taglib prefix="st" uri="http://www.springframework.org/tags" %><%@ taglib uri="http://www.springframework.org/tags/form" prefix="sf" %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Index</title></head><body> <fmt:setLocale value="zh_cn" /> <form action="<st:url value="/post/addUser"></st:url>" method="post"> <c:forEach items="${users}" var="user"> User:${user.name}<br/> Create time:<fmt:formatDate value="${user.createTime}"/><br/> Is girl: <c:choose> <c:when test="${user.girl}">Yes</c:when> <c:when test="${!user.girl}">No</c:when> <c:otherwise>N/A</c:otherwise> </c:choose> <br/> Checkboxs: <c:forEach items="${user.cbx}" var="item"> ${item}, </c:forEach> <br/> Age:${user.age}<br/> E-mail:${user.email}<br/> <hr/> <table> <thead> <tr style="text-align:left; background-color:#eee;"> <th>Company name</th> <th>User</th> <th>Create time</th> </tr> </thead> <tbody> <c:forEach items="${user.customers}" var="item"> <tr> <td>${item.company}</td> <td>${item.user.name}</td> <td><fmt:formatDate value="${item.createTime}" pattern="yyyy-MM-dd"/></td> </td> </c:forEach> </tbody> </table> <hr/> </c:forEach> User name: <input type="text" name="name" id="name" /><br/> Is girl: <input type="radio" name="girl" id="isGirl" value="true" checked="checked" /><label for="isGirl">Yes</label> <input type="radio" name="girl" id="noGirl" value="false" /><label for="noGirl">No</label><br/> Checkboxs: <input type="checkbox" name="cbx" id="cbx1" value="1" /><label for="cbx1">1</label> <input type="checkbox" name="cbx" id="cbx2" value="2" /><label for="cbx2">2</label> <input type="checkbox" name="cbx" id="cbx3" value="3" /><label for="cbx3">3</label> <br/> Age:<input type="text" name="age" id="age" /><br/> E-mail:<input type="text" name="email" id="email" /><br/> Create time: <input type="text" name="createTime" id="createTime" /><br/> Company: <input type="text" name="customers[0].company" id="customers[0].company" /><br/> <input type="submit" value="add" /> <sf:errors path="*"></sf:errors> </form> <hr//</body></html>

4. Test results

The above is all the content of this article. I hope it will be helpful to everyone's learning and I hope everyone will support Wulin.com more.