Spring MVC学习教程之流程表单提交，3步实现这个功能

本文中将用Spring实现流程表单的提交功能，具体功能是使用web表单来添加一个新员工到员工名单列表中。

网络配图

第1步:准备所需的类

添加 addEmployeeEmployeeManager.java方法，这个方法将用于添加新员工到列表中。

EmployeeManager.java
package com.programcreek.helloworld.service;
import java.util.ArrayList;
import java.util.List;
import com.programcreek.helloworld.model.Employee;
public class EmployeeManager {
private static List<Employee> employeeList;
public EmployeeManager(){
employeeList = new ArrayList<Employee>();
employeeList.add(new Employee(1, "Mike", "Smith"));
employeeList.add(new Employee(2, "John", "Taylor"));
employeeList.add(new Employee(3, "Dave", "Wilson"));
}
public List<Employee> getEmployeeList(){
return employeeList;
}
public Employee addEmployee(Employee e){
Employee employee = new Employee();
employee.setId(employeeList.size()+1);
employee.setFirstName(e.getFirstName());
employee.setLastName(e.getLastName());
employeeList.add(employee);
return employee;
}
}
Employee.java
package com.programcreek.helloworld.model;
public class Employee {
private int id;
private String lastName;
private String firstName;
public Employee(){
}
public Employee(int id, String lastName, String firstName) {
this.id = id;
this.lastName = lastName;
this.firstName = firstName;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
}

第2步:创建控制器

创建一个控制器来处理表单的提交。

EmployeeAddController.java
package com.programcreek.helloworld.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.programcreek.helloworld.model.Employee;
import com.programcreek.helloworld.service.EmployeeManager;
@Controller
public class EmployeeAddController {
@RequestMapping("/showEmployeeForm")
public ModelAndView getEmployeeForm(){
ModelAndView mv = new ModelAndView("employeeAdd");
mv.addObject("employeeEntity", new Employee());
return mv;
}
@RequestMapping("/addEmployee")
public ModelAndView addEmployee(@ModelAttribute Employee e){
ModelAndView mv = new ModelAndView("EmployeeList");
EmployeeManager employeeManager = new EmployeeManager();
employeeManager.addEmployee(e);
mv.addObject("EmployeeList", employeeManager.getEmployeeList());
return mv;
}
}

网络配图

控制器有两个请求:一个是实现网页表单和其他流程表单的提交，这里用 @ModelAttribute的注解形式将属性映射到一个

员工表。

第3步:创建视图即jsp页面

employeeAdd.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<body>
<h1>Add Employee</h1>
<form:form method="post" modelAttribute="employeeEntity" action="addEmployee">
First Name:<form:input path="firstName"></form:input><br/>
Last Name: <form:input path="lastName"></form:input><br/>
<input type="submit" value="Submit">
</form:form>
</body>
</html>

添加一个新的链接,用来完成添加员工。

index.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Spring 4 MVC - HelloWorld Index Page</title>
</head>
<body>
<center>
<h3>
<a href="hello">Hello World</a>
</h3>
<h3>
<a href="employee">员工列表</a>
</h3>
<h3>
<a href="showEmployeeForm">添加</a>
</h3>
</center>
</body>
</html>