공식문서
결과
클라이언트가 /user URL에 접속:
- 사용자가 웹 브라우저를 통해 /user로 GET 요청
- Spring MVC의 UserController가 요청 처리:
- @RequestMapping(value = "/user", method = RequestMethod.GET)에 매핑된 user() 메서드가 호출
- ModelAndView 객체 생성 및 반환:
user() 메서드는 ModelAndView 객체를 생성, 뷰 이름으로 "user", 모델 객체로 "command"를 설정하고, 초기화된 User 객체를 모델에 추가. 이 ModelAndView 객체는 뷰(즉, user.jsp)와 모델 데이터를 포함한다.- 뷰 렌더링:
반환된 ModelAndView 객체에 따라 user.jsp 페이지가 렌더링된다.- 폼 데이터 제출:
사용자가 폼을 작성하고 제출 버튼을 클릭하면, 폼 데이터는 /addUser로 POST 요청을 통해 전송된다.- POST 요청 처리:
- @RequestMapping(value = "/addUser", method = RequestMethod.POST)에 매핑된 addUser(@ModelAttribute("SpringWeb") User user, ModelMap model) 메서드가 호출.
- 이 메서드는 제출된 폼 데이터를 받아 User 객체에 바인딩하고, 이 객체를 모델에 추가한다.
- 결과 뷰 렌더링:
addUser 메서드는 "users" 문자열을 반환한다. 반환된 뷰 이름에 따라 users.jsp 페이지가 렌더링되고, 이 페이지에는 ModelMap에 추가된 사용자 정보가 표시된다.- ModelAttribute 메서드:
@ModelAttribute 어노테이션이 붙은 메서드들은 UserController의 모든 요청 처리 메서드가 호출되기 전에 실행되어, 뷰에 전달될 모델 데이터를 준비한다.
User (M)
public class User {
private String username;
private String password;
private String address;
private boolean receivePaper;
private String[] favoriteFrameworks;
private String gender;
private String favoriteNumber;
private String country;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public boolean isReceivePaper() {
return receivePaper;
}
public void setReceivePaper(boolean receivePaper) {
this.receivePaper = receivePaper;
}
public String[] getFavoriteFrameworks() {
return favoriteFrameworks;
}
public void setFavoriteFrameworks(String[] favoriteFrameworks) {
this.favoriteFrameworks = favoriteFrameworks;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getFavoriteNumber() {
return favoriteNumber;
}
public void setFavoriteNumber(String favoriteNumber) {
this.favoriteNumber = favoriteNumber;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
}User (V)
<%@taglib uri = "http://www.springframework.org/tags/form" prefix = "form"%><%@ page isELIgnored="false" %>
<html>
<head>
<title>Spring MVC Form Handling</title>
</head>
<body>
<h2>User Information</h2>
<form:form method = "POST" action = "addUser">
<table>
<tr>
<td>
<form:label path = "username">User Name</form:label>
</td>
<td>
<form:input path = "username" />
</td>
</tr>
<tr>
<td>
<form:label path = "password">Password</form:label>
</td>
<td>
<form:password path = "password" />
</td>
</tr>
<tr>
<td>
<form:label path = "address">Address</form:label>
</td>
<td>
<form:textarea path = "address" rows = "5" cols = "30" />
</td>
</tr>
<tr>
<td>
<form:label path = "receivePaper">Subscribe Newsletter</form:label>
</td>
<td>
<form:checkbox path = "receivePaper" />
</td>
</tr>
<tr>
<td>
<form:label path = "favoriteFrameworks">Favorite Web Frameworks</form:label>
</td>
<td>
<form:checkboxes items = "${webFrameworkList}" path = "favoriteFrameworks" />
</td>
</tr>
<tr>
<td>
<form:label path = "gender">Gender</form:label>
</td>
<td>
<form:radiobutton path = "gender" value = "M" label = "Male" />
<form:radiobutton path = "gender" value = "F" label = "Female" />
</td>
</tr>
<tr>
<td>
<form:label path = "favoriteNumber">Favorite Number</form:label>
</td>
<td>
<form:radiobuttons path = "favoriteNumber" items = "${numbersList}" />
</td>
</tr>
<tr>
<td>
<form:label path = "country">Country</form:label>
</td>
<td>
<form:select path = "country">
<form:option value = "NONE" label = "Select"/>
<form:options items = "${countryList}" />
</form:select>
</td>
</tr>
<tr>
<td colspan = "2">
<input type = "submit" value = "Submit"/>
</td>
</tr>
</table>
</form:form>
</body>
</html>Users (V)
<%@taglib uri = "http://www.springframework.org/tags/form" prefix = "form"%>
<html>
<head>
<title>Spring MVC Form Handling</title>
<%@ page isELIgnored="false" %>
</head>
<body>
<h2>Submitted User Information</h2>
<table>
<tr>
<td>Username</td>
<td>${username}</td>
</tr>
<tr>
<td>Password</td>
<td>${password}</td>
</tr>
<tr>
<td>Address</td>
<td>${address}</td>
</tr>
<tr>
<td>Subscribed to Newsletter</td>
<td>${receivePaper}</td>
</tr>
<tr>
<td>Favorite Web Frameworks</td>
<td>
<% String[] favoriteFrameworks = (String[])request.getAttribute("favoriteFrameworks");
for(String framework: favoriteFrameworks) {
out.println(framework);
}
%>
</td>
</tr>
<tr>
<td>Gender</td>
<td>${(gender=="M"? "Male" : "Female")}</td>
</tr>
<tr>
<td>Favourite Number</td>
<td>${favoriteNumber}</td>
</tr>
<tr>
<td>Country</td>
<td>${country}</td>
</tr>
</table>
</body>
</html>UserController (C)
@Controller
public class UserController {
@RequestMapping(value = "/user", method = RequestMethod.GET)
public ModelAndView user() {
User user = new User();
user.setFavoriteFrameworks((new String[] {
"Spring MVC",
"Struts 2"
}));
user.setGender("M");
ModelAndView modelAndView = new ModelAndView("user", "command", user);
return modelAndView;
}
@RequestMapping(value = "/addUser", method = RequestMethod.POST)
public String addUser(@ModelAttribute("SpringWeb") User user,
ModelMap model) {
model.addAttribute("username", user.getUsername());
model.addAttribute("password", user.getPassword());
model.addAttribute("address", user.getAddress());
model.addAttribute("receivePaper", user.isReceivePaper());
model.addAttribute("favoriteFrameworks", user.getFavoriteFrameworks());
model.addAttribute("gender", user.getGender());
model.addAttribute("favoriteNumber", user.getFavoriteNumber());
model.addAttribute("country", user.getCountry());
return "users";
}
@ModelAttribute("webFrameworkList")
public Object[] getWebFrameworkList() {
List < String > webFrameworkList = new ArrayList < String > ();
webFrameworkList.add("Spring MVC");
webFrameworkList.add("Struts 1");
webFrameworkList.add("Struts 2");
webFrameworkList.add("Apache Wicket");
return webFrameworkList.toArray();
}
@ModelAttribute("numbersList")
public List < String > getNumbersList() {
List < String > numbersList = new ArrayList < String > ();
numbersList.add("1");
numbersList.add("2");
numbersList.add("3");
numbersList.add("4");
return numbersList;
}
@ModelAttribute("countryList")
public Map < String, String > getCountryList() {
Map < String, String > countryList = new HashMap < String, String > ();
countryList.put("US", "United States");
countryList.put("KR", "Republic of Korea");
countryList.put("SG", "Singapore");
countryList.put("MY", "Malaysia");
return countryList;
}
}소스코드
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